最新刊期
      卷 31 ， 期 6 ， 2011
      • Zhang Aimin,Hao Hai,Li Ming,Song Yingde,Zhang Xingguo
        Vol. 31, Issue 6, Pages: 491-495(2011)
        摘要：Effects of Al-3Ti-3B master alloy on grain refinement of AZ31 magnesium alloy were observed by OM （optical microscope）, XRD （X-ray diffraction）, SEM （scanning electron microscope） and EPMA. The results reveal that coarse dendrite is transformed into uniform equiaxed grain in the as-cast AZ31 alloy with proper Al-3Ti-3B master alloy. Desirable refining effects can be observed in the alloy with 0.4% Al-3Ti-3B alloy. Average grain size in solid solution treated AZ31 alloy is refined from 300 μm to 50 μm. Grain refinement is mainly controlled by creation of TiB2 and AlB2 particles as heterogeneous nuclei, and aggravation of TiB2 phase at the grain boundary can further restrain the growth of the primary Mg phase.  
        关键词：AZ31 Magnesium Alloy;Grain Refinement;Al-3Ti-3B Master Alloy;Heterogeneous Nucleation   
        2
        |
        209
        |
        4
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46141022 false
        发布时间：2023-12-18
      • Zhao Qian1,Fang Canfeng1,Hou Xiaoguang2,Han Yanbo1,Zhang Nan1,Zhang Xingguo1
        Vol. 31, Issue 6, Pages: 495-500(2011)
        摘要：Effects of spiral magnetic field on solidification structure of the continuous casting low point alloy were investigated. It is found that the spiral magnetic field can effectively relieve the macro-segregation and cause the broke of dendrite and refinement of solidification structure. Meanwhile, effects of different magnetic fields on solidification structure were analyzed comparatively. The results reveal that, at the same electromagnetic stirring parameters, compared with rotating magnetic field, spiral magnetic field exhibits the better effect in decreasing composition segregation between the bottom and the top of ingot, refining grain size and promoting the homogenization of ingot composition. Distribution of electromagnetic force in the spiral magnetic field is more beneficial for the uniform stirring of the larger zone to effectively promote the formation of equiaxed grain. Meanwhile, orientation of grain arrangement in the spiral magnetic field is lower than that in rotating magnetic field, exhibiting the more acceptable isotropy.  
        关键词：Spiral Magnetic Field;Rotating Magnetic Field;Macro-segregation;Low Point Alloys   
        2
        |
        388
        |
        9
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46143255 false
        发布时间：2023-12-18
      • Hu Yong1,Rao Li1,Yan Hong2
        Vol. 31, Issue 6, Pages: 501-503(2011)
        摘要：A fluidity model of semi-solid magnesium alloy was established based on the solidification theory. Filling behavior of the semi-solid AZ91D magnesium alloy was simulated by the model, which was well in agreement with experimental ones. The filling ability of the semi-solid alloy was tested by fluidity experiment. The results show that filling ability of the sheared semi-solid magnesium alloy slurry is greatly superior to that of un-sheared ones. Filling length of magnesium alloy slurry before and after shearing is firstly increased gradually and then decreased with decreasing in filling temperature. The maximum filling length of the semi-solid magnesium alloy slurry can be observed at filling temperature of 560570℃.  
        关键词：Semi-solid;Magnesium Alloy;Fluidity   
        2
        |
        215
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46141780 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 500(2011)
        摘要：<正>美国铸造业正处在经济危机（从2008年年底至2010年年初）后的恢复当中。2007美国铸造业年销售额为282亿美元,而在金融危机最严重的2009年,年销售额仅为212亿美元。美国铸造行业从2010年出现回暖迹象,年增长率为9.3%。2011年经济复苏的速度有望加速增长,预计年销售额263亿美元。美国铸造业将于2012年恢复到2007年的水平,有望于2013年超越。  
          
        2
        |
        22
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46142724 false
        发布时间：2023-12-18
      • Zhao Jipeng,Shao Songwei,Chen Jiaoxian
        Vol. 31, Issue 6, Pages: 504-506(2011)
        摘要：MoSi2 alloy samples contained various W were prepared with Mo, W and Si powder as raw materials by mechanical activation combining with hot pressing sintering technology. The microstructure of the MoSi2 alloy was observed by OM （optical microscope） and SEM （scanning electron microscope）. The results show that the MoSi2 alloy containing W element is mainly composed of MoSi2 phase, （Mo,W）Si2 solid solution phase and a little Mo4.8Si3C0.6 phase. With W addition, grain size is refined in range of 59.778.6 nm which exhibits nano-crystalline structure as a result of causing the increase of micro-strain of MoSi2 and the decrease of grain size and the matrix is strengthened. With increasing in W addition, lattice constant and lattice volume are increased in the MoSi2 alloy with the decrease of the density.  
        关键词：MoSi2;Hot Pressing Sintering;Metallic Silicide;Alloying   
        2
        |
        86
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46140477 false
        发布时间：2023-12-18
      • Wei Zhongshan1,Liu Liufa2
        Vol. 31, Issue 6, Pages: 507-510(2011)
        摘要：Effects of laser cladding treatment on surface performance of AZ31 magnesium alloy sheet were observed by the help of Nd-YAG laser. Rapid melting-solidification occurs on the surface of the AZ31 magnesium alloy sheet, and treated surface is composed of re-melting zone and heat history zone. Grain size is apparently refined in the re-melting zone, and hardness is increased by 5% compared to that of the matrix. Immersing corrosion experiment shows that corrosion resistance of AZ31 magnesium alloy with laser cladding treatment is greatly improved in 3.5% NaCl solution, which is attributed to grain refinement in re-melting zone and enrichment of Al element in cladding surface.  
        关键词：Magnesium Alloy;Laser Cladding Treatment;Microstructure;Corrosion Resistance   
        3
        |
        271
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46141112 false
        发布时间：2023-12-18
      • Liu Jingfu1,Cui Jia1,Li Rongde2,Song Jian2,Chen Pengfei2
        Vol. 31, Issue 6, Pages: 510-513(2011)
        摘要：Precipitate phase MnAl6 was fabricated based on element distribution of Mn-enriched in high Mn ZA35 alloy to understand effects of precipitated phase on electrochemical behavior of high Mn ZA35 alloy. Open circuit potential against time and polarization curves of Mn-enriched phase MnAl6 and ZA35-1.2Mn in NaCl aqueous solution were measured by potential dynamic polarization, and phase constituent of the alloy was examined by XRD （X-ray diffraction）. The results show that with increasing in temperature of NaCl solution, the open-circuit potential （OCP）of the alloy is shifted gradually into the negative direction, and the OCP of the Mn-enriched phase MnAl6 is lower than that of ZA35-1.2Mn alloy, while corrosion current density is higher than that of the ZA35-1.2 Mn alloy. The precipitate MnAl6 phase in ZA35-1.2Mn alloy is dissolved preferentially as anode zone in 3.5% NaCl aqueous solution.  
        关键词：Mn-enriched Phase;ZA35-1.2Mn Alloy;Potentiodynamic Polarization;Open-circuit Potential;Polarization Curves   
        2
        |
        102
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46140562 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 506(2011)
        摘要：<正>近日,山东兖矿轻合金有限公司进口的美国阿尔麦斯公司30吨立式液压半连续铸造机带料试车成功,并一次成功铸出3根长6米,质量约8.5吨,直径816毫米合金铸棒,此铸棒为国内采用电解铝液铸造规格最大的铝合金圆铸锭,处于国内领先水平;据了解,截止4月底,该公司已经顺利铸出直径  
          
        2
        |
        24
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46139984 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 513(2011)
        摘要：<正>2011年5月27日,"中南大学有色金属材料科学与工程教育部重点实验室——清远再生金属技术开发试验室"在清远云铜举行揭牌仪式。2010年8月,清远市清城区人民政府、中南大学材料科学与工程学院、清远市再生金属科技创新  
          
        2
        |
        19
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46140911 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 524(2011)
        摘要：<正>近日,哈电集团哈尔滨电机厂有限责任公司与美国GE（通用电气公司）运输集团签约成为合作伙伴。根据合约,哈电机公司将为美国GE生产380吨矿用卡车驱动部分铸件。由此,哈电铸件产品将成为全球一流运输机械制造商的配套产品。  
          
        2
        |
        36
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46140823 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 528(2011)
        摘要：<正>日前,一款超大型低压铸造机4512在万丰科技成功问世。该低压铸造机高13米,宽10米,重70吨,工作台面尺寸达4.5米×3米,保温炉容量1.5吨,可以生产重量为30800千克,尺寸范围为4米×2.5米×2.5米以内的各类复杂的高品质铝合金低压铸件。如发动机的K50连接体、K38连接体、齿轮箱盖、油底壳等产  
          
        2
        |
        65
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46140094 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 531(2011)
        摘要：<正>随着国家城镇化战略的实施,全国各地都在加强供水管网等基础设施的建设和改造。从今后发展动向来看,全国县城和建制镇是今后国内供水管道建设发展的重点。2600多个中小城镇和广大农村乡镇都将实现自来水供应,需建立众多的自来水管网,铺设和使用更多的供水压力管材。国家的发展规划和政策导向已明确提  
          
        2
        |
        50
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46143736 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 539(2011)
        摘要：<正>通州以形成百亿级汽车压铸产业为目标,加快引进压铸行业大企业,做大做强汽车压铸产业链,完善汽车配件产业链,着力打造中国压铸行业生产基地,助推通州装备制造业转型升级。目前,首期投资3亿元,注册资本5000万元的鸿图压铸项目正在进行基础设施建设,项目已于今年3月  
          
        2
        |
        37
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46140128 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 560(2011)
        摘要：<正>尽管主要经济体近期发布的宏观经济数据逊于预期,但与之前希腊债务问题炒作阶段相比,市场的担忧情绪有所缓和,金属市场从5月中旬的阶段性底部逐步走强。在这样的背景下,国家发改委宣布自2011年6月1日起,将山西、青海、甘肃、江西、海  
          
        2
        |
        18
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46142347 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 564(2011)
        摘要：<正>近日,在徐州徐航压铸有限公司的车间看到,庞大的压力铸造机一边吞进铝锭,一边吐出一组组造型复杂的铸件。"下线的产品是6缸发动机铝合金缸体,这是公司最新自主研发、拥有完全自主知识产权的产品,填补  
          
        2
        |
        29
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46140113 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 575(2011)
        摘要：<正>面对企业发展难寻人才、学生毕业难觅高就的"两难"怪圈,天津立鑫晟精细铸造有限公司（简称立鑫晟）,分别与河北机电职业技术学院、佳木斯大学材料学院、河北工业大学、安徽科技大学、河北科技大学等院校的铸造专业,签订定向培育铸造行业各类人才的协议,辟出校企联手育才新路径。  
          
        2
        |
        25
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46142242 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 579(2011)
        摘要：<正>铸造用生铁行业再掀风暴。继此前对铸造行业专用优质铸造生铁生产企业提出过渡性政策后,铸造用生铁企业的认定规范工作于日前正式启动。为促进该领域健康发展,防止落后炼铁产能变相逃避淘汰,工业和信息化部近期发布了《铸造用生铁企业认定规范条件》（以下简称《规范》）。《规范》要求,符合条件的企业应进行技术升级改造、兼并重组、整合达标,而不符者,将依据钢铁行业政策按期淘汰。  
          
        2
        |
        20
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46140152 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 586(2011)
        摘要：<正>在国内,铸造业是关系国计民生的重要行业,是汽车、石化、钢铁、电力、造船、纺织、装备制造等支柱产业的基础,是制造业的重要组成部份。据国际模具及五金塑胶产业供应商协会秘书长罗百辉介绍,我国铸造生产企业主要分布在东部,西部产量较少,目前全国铸造企业约有24000家,从业人员约120多万。  
          
        2
        |
        89
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46143701 false
        发布时间：2023-12-18
      • Wu Shiping1,Wang Ye1,Chen Liliang2,Kong Liming3
        Vol. 31, Issue 6, Pages: 514-516(2011)
        摘要：Filling and solidification of aluminum alloy drain pipe for automobile in tilting casting and in gravity casting were predicted by the Anycasting software. Simulated results were analyzed quantitatively. The results reveal that, for thin-walled drain pie with complex structure and large ratio of length via thickness , compared with gravity casting, tilting casting exhibits the features of lower and smooth filling velocity, uniform distribution of filling pressure from bottom to top, desirable exhausting effects and lower entrapped-gas and shrinkage porosity tendency, greatly improving the quality of the parts and production yield.  
        关键词：Aluminum Alloy;Automobile Drain Pipe;Tilting Casting;Numerical Simulation   
        2
        |
        213
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46140750 false
        发布时间：2023-12-18
      • Wang Xiaolin1,Zhao Zhilong2,Ma Yuxuan1,Zhang Yansheng1,Ma Haiyin3,Ma Mintuan4
        Vol. 31, Issue 6, Pages: 517-520(2011)
        摘要：Interface problem in the three-dimensional model and the software which was used to mesh the grid was resolved by modeling with the Solidworks and meshing grid with the Meshcast. Flow field and temperature field of ZTC4 frame-shaped parts during filling and solidification process were visualized to predict the possible location of shrinkage porosity and cold shut in the parts, which is well in agreement with the practical product. The simulated results were applied to optimize the process of the same type castings with the larger size and more complex structure, avoiding the generation of the similar defects.  
        关键词：Ti Alloy Castings;Filling;Solidification;Numerical Simulation   
        2
        |
        78
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46141257 false
        发布时间：2023-12-18
      • Chen Bin,Liu Ge,Zhang Xianming,Wang Xudong
        Vol. 31, Issue 6, Pages: 520-524(2011)
        摘要：Aiming at the characteristics of complexity, non-linear and multi-model of HVAS recovery for large shaft, by using fuzzy C-means clustering algorithm to obtain input space location and the clustering center, T-S model of wear resistance with spraying parameters of the coating was established based on the least square method identifying consequent parameters. The T-S fuzzy model was verified with the experimental data. The results show that the error is in range of -8.6%5.8% in experimental range. The T-S fuzzy model exhibits the higher identification precision and desirable generation ability. Effects of spraying parameters on wear resistance of the coating were analyzed by the established model, and the maximum value of hardness of the coating, such as HRC 92.4, was presented with the optimized spraying parameters.  
        关键词：T-S Fuzzy Model;Wear Resistance;Fuzzy C-means;Fuzzy Identification   
        2
        |
        48
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46141994 false
        发布时间：2023-12-18
      • Li Jingtan1,Wang Shuncheng2,Qi Wenjun2,Chen Hexing2,Yin Dengfeng1
        Vol. 31, Issue 6, Pages: 525-528(2011)
        摘要：Effects of pouring temperature and grain refiner （Al-5Ti-1B）addition on microstructure of semi-solid A356 alloy billets prepared by compound process of low temperature pouring and grain refining were investigated. The results show that with decreasing pouring temperature from 715℃ to 635℃, primary Al phase is transformed from dendrite into rosette structure and then into equiaxed one, where grain size is refined and spheroidized with decreasing in the pouring temperature. However, with decreasing pouring temperature to 615℃, grain exhibits coarse and un-even. At a given pouring temperature, grain size is refined with increasing in grain refiner addition, however, the refining effects are gradually fade as the pouring temperature decreases. Grain size and morphology change can be ignored with adding grain refiner at below 635℃.Optimized processing parameters are as follows: pouring at 635655℃ and 0.1%0.2% grain refiner addition.  
        关键词：Semi-solid Metal;A356 Aluminum Alloy;Low Super-heat Pouring;Grain Refiner   
        2
        |
        276
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46142883 false
        发布时间：2023-12-18
      • Wang Jiaxuan,Fang Min,Luo Yizheng,Liu Zhaoliang
        Vol. 31, Issue 6, Pages: 529-531(2011)
        摘要：Effects of temperature and distance of treated area on the solidification of semi-solid A356 alloy in the double ultrasonic field were investigated. The results show that double ultrasonic field exhibits desirable refining and spheroidized effects on solidification structure in the alloy. The desirable grain size with spheroidization in the microstructure of the alloy can be observed with pouring at 630℃ and applying ultrasonic treatment. However, with increasing in ultrasonic temperature, grain size is gradually coarsened. In addition, due to the fade of ultrasonic wave, microstructure exhibits the most desirable when the distance of treated area is 5 mm.  
        关键词：Double Ultrasonic Field;A356 Alloy;Grain;Spheroidization   
        2
        |
        104
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46142367 false
        发布时间：2023-12-18
      • Hu Qingming1,Liu Jie2,Li Xibing1,Wang Shigang1,Lin Ying3
        Vol. 31, Issue 6, Pages: 532-535(2011)
        摘要：Through analyzing the T-shaped gating system for magnesium alloy cylinder cover for automobile engine, thickness of the runner and structure size of exhausting-overflow system were optimized. Temperature filed and flow field of the magnesium alloy in die casting during filling and solidification process were simulated by the JScast to predict the potential defects, such as shrinkage porosity （hole） and flowing mark. Based on simulated results, corresponding optimized process was conducted to improve the filling effects and quality of the die casting cylinder cover. The results indicate that the volume of optimized cylinder cover is decreased by 2.5% with excellent filling effects. Reliability of numerical simulation was verified.  
        关键词：T-shaped Gating System;Numerical Simulation;JScast Software;Temperature Field   
        2
        |
        124
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46140931 false
        发布时间：2023-12-18
      • Xiang Chun1,Ying Xinfa2
        Vol. 31, Issue 6, Pages: 535-539(2011)
        摘要：As an important technical parameter in squeezing casting, the squeezing force is the dominant effects on microstructure and properties of the squeezing castings. Thermodynamic coupling model based on the FEM was employed to simulate squeezing casting convex-type punch and to analyze function of specific pressure with microstructure and mechanical properties of the A356 alloy parts, obtaining economic critical squeezing forces. The results reveal that with increasing in squeezing force, shrinkage porosity （hole） is gradually decreased to be eliminated, and then the further improvement of the defects can be ignored, however, loading of the mould is increased. In addition, with increasing in squeezing force, grain size in the castings is refined, where with 120MPa squeezing force, grain size is decreased by 8%, and secondary arm spacing is narrowed by 12.5%, and then refinement of grain size can be ignored.  
        关键词：Squeezing Casting;Squeezing Force;Thermodynamic Coupling;Stress Field;Numerical Simulation   
        2
        |
        142
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46143430 false
        发布时间：2023-12-18
      • Liu Honglei
        Vol. 31, Issue 6, Pages: 540-541(2011)
        摘要：Sr content in A356.2 aluminum alloy ingot, in melt in smelting furnace and ladle as well as in melt in holding furnace of low pressure die casting was analyzed comparatively to understand the burning-loss of Sr in A356.2 aluminum alloy during melting process. The results show that there exists serious Sr burning-loss in A356.2 aluminum alloy during melting process, and Sr burning-loss in melt in holding furnace of low pressure die casting is lower than that during melting process. Sr content in the Al alloy could be modified by adding Al-Sr alloy before refining and degassing to meet the processing requirement.  
        关键词：A356.2 Aluminum Alloy;Melting;Sr;Burning-loss   
        2
        |
        318
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46141151 false
        发布时间：2023-12-18
      • Fan Xiuqian,Tang Yongrong
        Vol. 31, Issue 6, Pages: 542-544(2011)
        摘要：The tolerance of the main installed dimension of C2, C2K typed blade fram of scraper for conveyor is required to be CT23 class. Through adjusting mould dimension, making the draft angle of some key location in the mould to 0, using side-core-board and push-out mechanism to take out the wax pattern, designing hard-wax core to reduce shaping error of the wax pattern as well as using special knife to repair the wax pattern, and setting rational wax pattern assembling tree , pouring with a higher temperature, CT23 class accuracy can be realized in the key location in the heat treated investment castings after controlling geometric tolerance with dedicated gauges and C shaped plate.  
          
        2
        |
        68
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46142263 false
        发布时间：2023-12-18
      • Xu Gaolei1,Zhang Yinghui2,Yang Bin2,Zhao Hongjin2,Yao Youfu1,Luo Yuefeng1
        Vol. 31, Issue 6, Pages: 545-547(2011)
        摘要：Effects of annealing treatment on microstructure and performance of Cu cladding Al strip for coaxial cable were investigated. Three-stage compound method that is surface treatment, rolling compound and heat treatment was used for preparing the Cu cladding Al strip. The results show that with rolling compound reduction of 67% and annealing at 310℃ for 1 hours, tensile strength and elongation and cupping value reach up to 78 MPa and 23.17%, 8.56 mm, respectively.  
        关键词：Cu Cladding Al Strip;Annealing Treatment;Elongation;Tensile Strength;Cupping Value   
        2
        |
        247
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46142609 false
        发布时间：2023-12-18
      • Yue Xudong,Chen Shuying,Chang Guowei
        Vol. 31, Issue 6, Pages: 547-549(2011)
        摘要：Macro-structure and microstructure of horizontal continuous Pb brass with two diameters produced with copper scraps as raw materials were observed by OM （optical microscope） and SEM （scanning electron microscope）. The results reveal that microstructure of the ingot with 105 mm in diameter is mainly composed of equiaxed grain with fine size, and absence of apparent columnar grain at cross section can be observed, while microstructure of the ingot with 150 mm in diameters exhibits turbulent, and presence of columnar grain at cross section can be observed, and coarse equiaxed grain zone is located nearby the bottom. Round fine Pb particle occurs in the boundary of equiaxed grain. Change of solidification structure is attributed to incorrect secondary cooling ways and deviation of cooling capacity of crystallizer along circle. Through adopting ring-shaped cooling equipment to perform secondary cooling and to decrease drawing velocity, solidification structure of the ingot is greatly improved.  
        关键词：Horizontal Continuous Casting;Pb-brass;Grain;Solidification Structure   
        2
        |
        149
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46143084 false
        发布时间：2023-12-18
      • Zhang Weiqi
        Vol. 31, Issue 6, Pages: 550-552(2011)
        摘要：To further improve the stability and reliability of SCR copper bar line, backfire on the nozzle of shaft furnace was overcome through long-term exploration from practical production. Considering factors and harms of backfire on the shaft furnace, through emphatic and regular maintenance and in-time monitoring as well as proper-time replacement for water cooling sleeve, backfire filter and proof-explosion film for the nozzle, and sustainable processing equipment innovation, backfire on the shaft furnace can effective be avoided, realizing the goal of energy-saving and consumption-reduction, increase of shaft furnace life and economic profit.  
          
        2
        |
        73
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46140985 false
        发布时间：2023-12-18
      • Guo Guangsi,Jia Weitao
        Vol. 31, Issue 6, Pages: 553-556(2011)
        摘要：By using bauxite and zircon powder as refractory materials, bentonite of natrium and CMC as compound defloculant and sol silicate, PVB and phenolic resin as compound binding agent, based on the orthogonal testing, the water-based coating for EPC steel castings was developed. The various properties of the prepared coating were examined, and it was compared with coating from the Asland company at the U.S.A in performances. The results show that the prepared coating has the advantages of desirable performance and low cost.  
        关键词：EPC;Bauxite;Zircon Powder;Water-based Coating   
        2
        |
        312
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46142487 false
        发布时间：2023-12-18
      • Liu Dejun,Fan Zitian,Jiang Wenming,Liao Defeng
        Vol. 31, Issue 6, Pages: 556-560(2011)
        摘要：Relationship between processing parameters of LFC shell mold casting aluminum alloy with vacuum and low pressure and filling as well as inner quality of castings was investigated. The results show that filling ability is proportional to processing parameters, such as pouring temperature, gas flow, vacuum rate, gas pressure. Compared with vacuum rate and gas pressure, gas flow and pouring temperature is dominant in filling ability of the castings. Filling behavior in thin-walled castings is seriously related to processing parameters than in thick-walled ones. Porosity in the castings is firstly decreased and then increased with increasing in pouring temperature, and it is decreased with increasing in gas flow, gas pressure and vacuum rate, while density is increased with the increase of parameters. The desirable processing parameters are as follows: pouring temperature of 720750 ℃, gas flow of 1219 m3/h, vacuum rate of -0.03-0.04 MPa and gas pressure of 0.030.04 MPa.  
        关键词：LFC Shell Mold Casting;Filling Behavior;Quality of Castings;Thin-walled Castings   
        4
        |
        218
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46143141 false
        发布时间：2023-12-18
      • Zhang Yinghui,Wang Da,Zhao Hongjin,Zhang Mingming,Li Zhiyu
        Vol. 31, Issue 6, Pages: 561-564(2011)
        摘要：Bonding mechanism of cold rolling Cu cladding Al Compound was analyzed by OM （optical microscope） and SEM （scanning electron microscope） as well as EDS （energy dispersive spectrometer）. Growth dynamic equation of diffusion layer of the interface at different rolling reduction with annealing treatment was established to understand effects of different reduction on growth rate of diffusion layer. The results show that with increasing in reduction, numbers of activated center formed at the interface are increased during rolling compound, and maximum value can be observed with 75% reduction. In addition, in the condition of the higher annealing temperature, reduction is greatly related to the growth rate of diffusion layer.  
        关键词：Cu/Al Compound;Rolling Reduction;Interface Reaction;Growth Dynamics   
        2
        |
        402
        |
        7
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46144191 false
        发布时间：2023-12-18
      • Sui Yudong,Jiang Yehua,Li Zulai,Zhou Rong,Shan Quan
        Vol. 31, Issue 6, Pages: 565-567(2011)
        摘要：WC particle reinforced steel matrix surface composites were successfully prepared by casting-infiltration method, and effects of nickel powder on microstructure and interface of WC/steel matrix surface composites were observed by OM （optical microscope） and SEM （scanning electron microscope） and EDS （energy dispersive spectrometer）. The results reveal that with increasing in nickel powder addition, WC particles in infiltrated layer are increased, which results in the smooth transition between composite layer and the matrix and the improvement of surface quality. In addition, with the increase of Ni powder addition, interface layer exhibits smooth change, and martensite, residual austenite as well as eutectic carbide in the matrix are increased gradually, resulting in the gradient increase of hardness of composite surface layer.  
        关键词：Preform Layers;Steel Matrix Surface Composites;Ni Powder   
        2
        |
        146
        |
        4
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46141511 false
        发布时间：2023-12-18
      • Li Liang,Liu Lanjun,Cui Xiao,Wang Zhizhi,Yang Dongdong,Lü Xue,Zu Fangqiu
        Vol. 31, Issue 6, Pages: 568-571(2011)
        摘要：Cu40Zr45Al7Ag8 bulk metallic glasses were prepared by water quenching under different overheating temperatures（930℃, 1030℃）. The crystallization behavior was studied by differential scanning calorimetry （DSC）. The precipitated phases in Cu40Zr45Al7Ag8 bulk metallic glasses at different annealing temperatures with different time were analyzed by X-ray diffraction. The results show that melt overheating treatment can enhance glass-forming ability and resistance for crystallization and thermodynamic stability.  
        关键词：Bulk Metallic Glasses;Superheat;Glass-Forming Ability;Crystallization   
        2
        |
        135
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46142665 false
        发布时间：2023-12-18
      • Jia Zheng,Zhang Zhiqiang,Le Qizhi,Cui Jianzhong
        Vol. 31, Issue 6, Pages: 571-575(2011)
        摘要：Hydrogen content measurement in Al and Mg alloy is an important work because hydrogen-absorption during melting process can seriously affect the microstructure and properties of the alloy. Measuring ways of hydrogen content in Al alloy and Mg alloy were surveyed including sampling method, direct measuring method and other methods. The difference of various methods was analyzed. Developing tendency of measuring ways of hydrogen in the aluminum alloy was presented. The hydrogen-measuring in Mg alloy would be a spotlight in the future. It is a developing tendency to develop a kind of hydrogen-measuring instrument for Mg alloy with rapidly, precisely, simply, and directly measuring hydrogen in Al alloy is a future direction.  
        关键词：Aluminum Alloy;Magnesium Alloy;Hydrogen Content;Hydrogen-measuring   
        2
        |
        451
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46142417 false
        发布时间：2023-12-18
      • Zhang Lili1,Li Pengting1,Liu Sida2,Nie Jinfeng1,Liu Xiangfa1
        Vol. 31, Issue 6, Pages: 576-579(2011)
        摘要：Grain refinement performances of Al-5Ti-0.4C, Al-5Ti-1B and Al-3Ti-1B-0.2C on A356 alloy were investigated comparatively. The results show that average size of α-Al is decreased from above 1000μm to approximately 175μm with 0.2% Al-3Ti-1B-0.2C at 730 ℃, and the fade of refining efficiency can not be observed within 60 min, which is greatly superior to those of Al-5Ti-0.4C and Al-5Ti-1B master alloy. It is also found that modification effects of Sr on eutectic Si is independent of addition of the Al-3Ti-1B-0.2C master alloy. Compared with those of A356 alloy modified with Al-5Ti-1B, ambient tensile strength and elongation of the alloy modified with Al-3Ti-1B-0.2C are increased by 5.18% and 15.98%, respectively.  
        关键词：A356 Alloy;Refinement;Modification;Al-3Ti-1B-0.2C Master Alloy   
        2
        |
        321
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46143039 false
        发布时间：2023-12-18
      • Li Yanguang,Zhan Lihua,Tan Sige
        Vol. 31, Issue 6, Pages: 580-582(2011)
        摘要：Tensile creep aging treatment was conducted with 2124 aluminum alloy plate on the RWS electronic creep-relaxation testing machine with aging at 185℃ for 5 15 hours and 150250 MPa to obtain creep strain of the alloy at different aging time and stress. Microstructure and ambient hardness of the alloy with aging at 185℃ for 8 hours and 12 hours as well as 200250 MPa were presented by OM （optical microscope） and the Vickers hardness testing. The results show that material forming is closely related to aging time and stress. At a given 200MPa stress, hardness of the alloy is increased with increasing in aging time at 185 ℃ for 015 hours, and maximum hardness value of the alloy reaches up to 136.7 Hv for 15 hours. Creep rate, strain rate and grain size in the alloy are increased with the increase of aging time and stress.  
        关键词：Creep Aging Treatment;2124 Aluminum Alloy;Creep Time;Stress   
        2
        |
        299
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46142750 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 582(2011)
          
        2
        |
        26
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46144273 false
        发布时间：2023-12-18
      • Lu Yang,Zhou Jingjing,Yang Xiaotian,Ding Minghui
        Vol. 31, Issue 6, Pages: 583-586(2011)
        摘要：Cu-14Al-X powder coating was prepared by HVOF. Dry sliding experiment against 304 stainless steel was carried out to evaluate the friction and wear behavior of Cu-14Al-X coating by SEM （scanning electron microscope）, EDS （energy dispersive spectrometer）, EPMA （electronic probe micro-area analysis）. The results reveal that under dry sliding conditions, main wear mechanism of Cu-14Al-X coating is characterized by adhesive wear with slightly abrasive wear. The coating possesses excellent self-lubrication and wear resistance, especially under high loads, as a result of friction heat changing the coating to a perfect adhesive tribology surface. Micro-hardness of the coating reaches 500Hv, which makes the coating exhibit a lower wear rate, belonging to the mild wear.  
        关键词：High Al Bronze;HVOF;Dry Sliding;Friction and Wear Properties   
        2
        |
        195
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46141638 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 587-588(2011)
        摘要：<正>曾侯乙尊、盘（见下页）〔1〕战国（公元前475-前221年）早期青铜尊高39.1 cm,盘高24 cm湖北随州出土湖北省博物馆藏尊（盛酒器）和盘（盛水器）出土于曾国国君曾侯乙的墓中,故名。  
          
        2
        |
        317
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46143001 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 589(2011)
        摘要：<正>20110601大森齐,佐藤文好,金森幸一,等.铝合金悬架部件压铸模不良的改善.铸造工学,2010,82（5）:312-315.悬架部件的模具故障主要是内浇道前的烧蚀,约占90%。产生原因在于悬架采用高真空压铸形成的压差以及很高的内浇道速度两者而引起。烧蚀频率为8次/月,或每2000件左右发  
          
        2
        |
        33
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46144329 false
        发布时间：2023-12-18
      • Vol. 31, Issue 6, Pages: 590(2011)
        摘要：<正>20110601精密铸造模壳的烧结热处理炉,CN101905290A,2010.12.08,苏州工业园区振兴电炉有限公司.本发明提供一种精密铸造模壳的烧结热处理炉,包括炉体、炉门、推料机构、转送料机构和电气系统,炉体包括外套、内衬、内衬与外套之间的保温层、内衬形成的炉膛、内衬底部连接的底盘,炉体的外套和内衬呈圆柱形,内衬由微孔绝热板与陶  
          
        2
        |
        24
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46144303 false
        发布时间：2023-12-18
      0