最新刊期
卷 45 ， 期 10 ， 2025
- “在熔模铸造领域，研究了注射成型和MJP 3D打印技术在叶盘蜡模制备中的应用效果，为叶盘蜡模初期生产和后续的大规模批量化生产提供参考。”摘要：As the first step in investment casting， the dimensional accuracy of wax pattern directly influences the size of the ceramic shell， thus effecting dimensional precision of the final casting. In order to reduce the production time of wax patterns while improving their dimensional accuracy， the application of injection molding and MultiJet Printing （MJP） 3D printing technologies in the fabrication of vane disk wax patterns was investigated. The results indicate that the dimensional deviation of wax patterns produced by MJP 3D printing technology ranges from -0.1 to 0.1 mm after optimization， meeting the accuracy standard of CT3 grade. Additionally， the maximum warpage deformation of the wax patterns is reduced to 0.275 2 mm by optimizing injection molding process parameters， providing technical guidance for both the initial production and subsequent large-scale manufacturing of vane disk wax patterns.关键词：Investment Casting;Vane Disk Wax Pattern;Injection Molding;MultiJet 3D Printing2|0|0更新时间：2025-10-22
- “在尖端科技产业中，激光熔覆技术制备高温耐磨涂层的研究取得新进展，为材料耐磨性能提升提供新方案。”摘要：Due to the rapid development of aerospace， nuclear power， military and other cutting-edge technology industries， the requirements for wear resistance of materials under extreme conditions such as high temperature and heavy load are demanding. The preparation of high temperature wear-resistant coatings on the surface of substrate by laser cladding technology has become a research hotspot of surface treatment technology. The high temperature oxidation， high temperature formation of solid lubricant and friction diffusion in high temperature tribological behavior were summarized. The research status， advantages and disadvantages of design of high temperature wear-resistant powder， composite process and laser cladding preparation of high temperature wear-resistant coating were reviewed， and the development trend and application direction of high temperature wear-resistant coating by laser cladding technology were prospected.关键词：Laser Cladding;High Temperature Coating;Wear-resistance2|0|0更新时间：2025-10-22
- “在硬质合金增材制造领域，研究了不同成分和粒度对合金显微结构和力学性能的影响，为硬质合金制造提供新思路。”摘要：Cemented carbides with different compositions （WC-12Co and WC-17Co） and granularity （15～53 μm and 10～38 μm） were printed， degreased and sintered by BJAM technology. The influence of composition and granularity of raw powders on microstructure and mechanical properties of alloys were systematically investigated. The results indicate that the BJAMed WC-12Co and WC-17Co cemented carbides after degreasing and sintering achieve a relative density of 96%～98% and a sintering shrinkage rate of 25%～30%， where the hardness of former one is 1 270～1 280 HV30 with flexural strength of 1 840～2 000 MPa， while that of latter one is 1 080～1 090 HV30 with flexural strength of 1 640～1 960 MPa. The size distribution of raw powders has a significantly impact on microstructure of BJAMed specimens. Due to the presence of the second type of pores formed by feedstock interlocking during the powder spreading process， the abnormal growth of WC grains in BJAMed cemented carbides becomes a major challenge， especially for the feedstock powder with high Co content and coarser granules.关键词：Cemented Carbides;Binder Jetting;Additive Manufacturing;Microstructure;Mechanical Properties0|0|0更新时间：2025-10-22
- “在高保真选区激光熔化领域，专家建立了多物理场模型，揭示了AlSi10Mg合金SLM过程中匙孔形成机制，为解决孔隙问题提供解决方案。”摘要：A high-fidelity constituency laser melting multi-physical field model was established based on discrete element method and fluid volume method. Considering the rejuvenation pressure caused by material evaporation and Marlangoni convection， the formation mechanism of keyhole during the process of AlSi10Mg alloy SLM process was investigated through numerical simulation and experimental verification. The air bubble migration and solidification process under keyhole mode was revealed， and the effect of scanning speed on the formation of keyhole was explored. The results indicate that the deeper lockholes are formed in the molten pool under the action of high -energy density laser beams， which are prone to collapse. Bubbles generated by collapse of keyhole are migrated with the complicated convection in the molten pool， leading to final solidification to form pores. With the scanning speed decreasing， the molten pool becomes wider and the flow slows down， which inhibits the number and size of pores in the fusion path.关键词：Selective Laser Melting;AlSi10Mg Alloys;Keyhole;Numerical Simulation2|0|0更新时间：2025-10-22
- “在增材制造领域，研究人员构建了GH4169合金激光粉末床熔融三维高保真数值模型，探究了熔池形貌特征及匙孔演化规律。”摘要：3D numerical model with high fidelity for GH4169 alloy by laser powder bed fusion （LPBF） process was developed based on Discrete Element Method （DEM） combined with Volume of Fluid （VOF） method.The morphological characteristics of molten pool and keyhole evolution was investigated by numerical simulation method.The results indicate that the width and depth of molten pool， the peak temperature at monitored points， and the primary dendrite arm spacing are increased with the increase of laser power. In addition， with the laser power rising from 250 W to 300 W， the average width of molten pool is increased from 102.13 μm to 115.54 μm， with the amplification of 13.1%， and the average depth is increased from 69.06 μm to 104.72 μm， with the amplification of 51.6%. The proposed model was experimentally validated， and the simulation results were well consistant with the experimental ones with the overall error less than 5%， meeting the requirements of engineering application. Furthermore， the heat input in the molten pool is increased with the increase of laser power， leading to the raise of recoil pressure. The collapse of molten pool is intensified driven by the strong recoil force， resulting in a significant occurrence of keyhole-induced porosity defects.关键词：Laser Powder Bed Fusion;GH4169 Alloy;Molten Pool Morphology;Keyhole;Numerical Simulation2|0|0更新时间：2025-10-22
- “在增材制造领域，研究人员采用碳纳米管增强复合树脂覆膜砂，制备出高性能SLS砂型（芯），显著提升了抗拉强度和精度，降低了发气量，为提高铸件质量提供了新途径。”摘要：Taking arbon nanotubes as nanofiller and diphenylmethane dimaleimide and thermoplastic phenolic resin serving as composite binder， coated sand was prepared for selective laser sintering （SLS） in order to fabricate intricate structure sand molds （cores）. The tensile strength， gas evolution， and accuracy of SLS specimens were tested， and post-processing procedures were investigated. The results indicate that the composite resin-coated sand exhibits superior tensile strength and accuracy in comparison to traditional coated sand. With equivalent strength requirements， the composite resin-coated sand can utilize binder with a lower content， thereby reducing gas evolution， minimizing porosity defects， and enhancing casting quality.关键词：Carbon Nanotubes;Coated Sand;Selective Laser Sintering（SLS）2|0|0更新时间：2025-10-22
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Research Progress in Laser Wire Additive Manufacturing and Its Hybrid Manufacturing Technologies AI导读
“激光熔丝增材制造技术在复杂结构制造领域取得进展，专家探讨了复合热源熔丝技术，为提升部件质量提供策略。”摘要：Laser wire additive manufacturing technology exhibits unique advantages in the production of complex geometric structures， large equipment components， and lightweight production， which boasts high material utilization， promotes green production， and has garnered widespread attention in both industrial and academic fields. However， the technology faces significant challenges in adaptability to special materials， defect control， and equipment stability. Continuous optimization of process parameters is essential to ensure component quality. The current state on laser wire additive manufacturing technology was summarized. On this basis， the research status of hybrid heat source wire technology was explored， and the development trends of laser wire additive manufacturing technology was prospected.关键词：Additive Manufacturing;Laser Wire;Laser Hybrid Heat Source2|0|0更新时间：2025-10-22 - “在现代飞机轻质高效指标实现领域，专家研究了TA15薄壁结构激光成形连接变形控制技术，采用温差拉伸法有效抑制变形，为飞机结构整体化提供解决方案。”摘要：Large scale integration is an important technological direction for achieving lightweight and efficient indicators of modern aircraft. The use of additive manufacturing and laser forming connection technology is a key technical means to achieve the integration of aircraft structure， and shape control is the core problem that should be solved during the laser forming connection process. In view of deformation control problem in aircraft thin-walled structures during laser forming connection process， deformation control technology of laser forming connection for TA15 thin-walled structure was investigated， and simulation calculations and experimental verification were carried out based on temperature difference tensile method. The results indicate that the static temperature difference tensile method can effectively suppress the deformation of thin-walled structure connection compared with the conventional connection mode. The deformation amount of thin plate with 4 mm and typical thin-walled part is reduced by 49.6% and 24.4%， respectively， and the connection deformation amount is decreased with the increase of preheating temperature of base material.关键词：Thin-walled Structure;Laser Forming Connection;Temperature Difference Tensile Method;Deformation Control2|0|0更新时间：2025-10-22
- “在增材制造领域，研究了4043铝合金CMT电弧增材过程中层间锤击变形对其组织和力学性能的影响，优化工艺参数，提高零件性能。”摘要：The influence of different interlayer hammering deformation on the microstructure and mechanical properties of 4043 aluminum alloy during cold metal transition （CMT） arc additive manufacturing was investigated， and the process parameters were optimized to improve comprehensive performance of additive manufacturing parts. Thin-walled parts were prepared with welding wire of 4043 aluminum alloy. The influence of deformation amounts on the microstructure and mechanical properties of the material were analyzed by microstructure observation， grain size comparison， microhardness measurement， and tensile test. The results indicate that the grains of specimens without hammering are coarse， while those of ones with a deformation of 13% are finer， and those of ones with a deformation of 21% are the finest. Meanwhile， the fine strip Al-Si eutectic strip is distributed in a specific direction in α solid solution， and the dispersion degree is increased with the increase of distance from the substrate. In addition， the microhardness measurement and tensile test results reveal that the tensile strength and hardness of specimens without hammering are 160 MPa and 40.28~52.94 HV， while those of ones with hammering deformation of 13% is 173 MPa and 54.38~55.50 HV， and those of ones with hammering deformation of 21% is 182 MPa and 54.00~61.04 HV， respectively. The mechanical properties of the alloy are improved with the increase of hammering deformation.关键词：4043 Aluminum Alloy;CMT Additive;Additive Manufacturing;Arc Additive2|0|0更新时间：2025-10-22
- “WC-17Co硬质合金3DP成形研究取得进展，揭示了打印参数对生坯强度的影响，建立了参数优化模型。”摘要：Taking WC-17Co cemented carbides as object， binder jetting 3D printing （3DP） was untilized to design a three-factor three-level orthogonal experiment， and the standard test pieces were prepared and mechanical properties were tested. Effects of parameters including printing layer thickness， binder saturation， and binder standing time on the flexural strength of printed parts were investigated. The results indicate that the binder saturation has the greatest impact on bending strength， of which the range value is 5～10 times higher than that of other parameters. The followed ones are binder standing time， while the printing layer thickness demonstrate little impact. The bending strength is positively correlated with the saturation and standing time of binder. Finally， the relationship model between print parameter factor and bending strength was established through regression fitting analysis， and optimal values of printing parameters were obtained.关键词：Binder Jetting 3D Printing;Orthogonal Experiment;Bending Strength;Cemented Carbides;Process Optimization2|0|0更新时间：2025-10-22
Topic·Laser and Additive Manufacturing Technology
- “稀土元素在铸造铝合金中的作用研究取得进展，为优化性能提供新思路。”摘要：The role of rare earth elements in cast aluminum alloys was summarized， including grain refinement， modification， microalloying and improvement of corrosion resistance. The influence law of common single and multiple rare earth elements on microstructure and corrosion properties of as-cast aluminum alloys as well as mechanisms were reviewed. Future direction was proposed that synergy between rare earth elements and other elements need to be further explored to optimize properties of cast aluminum alloys， promoting wide application and development in the engineering field.关键词：Cast Aluminum Alloys;Rare Earth Elements;Microstructure;Corrosion Properties2|0|0更新时间：2025-10-22
Research·Review
- “在铝合金缸体铸件领域，研究者设计了两种浇注系统方案，通过数值模拟和生产验证，发现正置底注式方案能有效减少缩孔缩松缺陷，提高铸件质量。”摘要：Aiming at the problems of poor molding quality and casting defects of aluminum alloy cylinder block castings， different gating system schemes were designed， and effects of different gating system schemes on mold filling process， cooling rate of solidification process， and the shrinkage porosities and cavities in aluminum alloy cylinder block castings were investigated by numerical simulation and production verification. The results reveal that the filling process of normalized bottom injection design is relatively smooth without liquid metal turbulence， splashing and other phenomena， where the average cooling rate is increased by 23.91%， and the defective volume is reduced by 30.13% compared to that of casting inverted bottom injection design. Shrinkage defects are effectively reduced， therefore normalized bottom injection design is superior. After production verification， the molding quality of castings is satisfied without casting defects， and mechanical properties are desirable， meeting the requirements of aluminum alloy cylinder block castings.关键词：Engine Cylinder Block;Numerical Simulation;Gating System;Production Verification2|0|0更新时间：2025-10-22
- “在风冷淬火工艺研究中，提高中间喷管气体流速可优化FGH96合金环件毛坯温度场分布和残余应力控制。”摘要：The influence of air-cooled quenching parameter on temperature distribution， cooling rate， residual stress of FGH96 powder metallurgy （PM） superalloy ring was investigated by numerical simulation. The results reveal that on the basis of gas flow velocity of 90 m/s， overall improvement or only increasing the gas flow velocity of the middle nozzle to 120 m/s leads to the cooling rate enhancement of PM superalloy ring. The cooling rate of rings under different air-cooling conditions can be maintained above 120 ℃/min for an adequate time， which ensures the precipitation of γ′ phase. Improving the gas flow rate of the middle nozzles can intensify the cooling rate at the core of ring， resulting in the homogenization of temperature distribution， which indicates the preferred air-cooled quenching solution. The surfacial residual stress of the ring by air-cooled quenching is 35 MPa lower than that of ones by after conventional oil quenching with uniform distribution， which is conducive to the residual stress control of the ring.关键词：Air-cooled Quenching;Numerical Simulation;Ring Blank;Superalloy2|0|0更新时间：2025-10-22
- “在铝合金压铸领域，专家通过正交试验和AnyCasting软件模拟，建立了非线性压铸模型，优化工艺参数，有效降低孔隙缺陷，提升生产质量。”摘要：In order to optimize the production process parameters of aluminium alloy die castings and reduce the cost of trial-mould， the concept of comprehensive defect score was put forward with the objective of reducing pore defects， shrinkage and cavities. An orthogonal test scheme was designed for the key process parameters including mould temperature， filling speed and pouring temperature， and AnyCasting software was employed to simulate the aluminium alloy die casting process to obtain corresponding defect score. The non-linear die-casting model between process parameters and defect scores was established through the integrated learning model， and the improved grey wolf algorithm was utilized to determine the process parameters for aluminium alloy die-casting as follows： mould temperature of 188.84 ℃， filling speed of 1.83 m/s and pouring temperature of 670 ℃. The defect location of aluminium alloy die castings is consistent with the simulated ones after production verification with optimized process parameters， and the production quality meets the expected requirements.关键词：Aluminium Alloy Die Casting;Integrated Learning;Improved Grey Wolf Algorithm;Process Parameter Optimization2|0|0更新时间：2025-10-22
Research·Computer Application
- “在铸造技术领域，专家通过陶瓷颗粒砂和硅酸盐无机粘结剂的砂型工艺性能试验，确定了最佳陶瓷颗粒砂规格和粘结剂添加含量，为提高铸型强度提供解决方案。”摘要：The composition， particle size， and sphericity of ceramic sand were tested， and the performance of sand mold process based on ceramic sand and silicate inorganic adhesive were analyzed combined with single factor variable and orthogonal experiment. The results indicate that the optimal particle size in the single factor variable process performance test is 650 mesh， meanwhile the tensile strength is increased continuously with the addition of heating temperature， and the heating time shows a faint influence. With the increasing content of JNY-W81 inorganic adhesive， the tensile strength is increased continuously， which shows a trend of first rising and then falling with the growing content of JNY-A hardening accelerator. According to the orthogonal experiment and main factor analysis test results， the influence weights of each factor are determined as ceramic sand particle size， contents of JNY-W81 inorganic adhesive， heating time and heating temperature. The peak values of tensile strength at 10 min and 24 h are 3.528 MPa and 2.632 MPa， respectively， and compressive strength at 10 min is 11.659 MPa.关键词：Ceramic Sand;Silicate Inorganic Adhesive;Low-pressure Casting;Al Alloy;Processing Properties2|0|0更新时间：2025-10-22
- “在Mo-14Re合金真空钎焊领域，研究了Ni-Cr-Si-B焊膏对接头显微组织与力学性能的影响，发现钎焊温度和保温时间对焊接接头剪切强度有显著影响。”摘要：The influence of different process parameters on microstructure and mechanical properties of Mo-14Re alloy joint brazed by Ni-Cr-Si-B solder paste was investigated. The microstructure and phase composition of the joint were determined by scanning electron microscopy （SEM）， energy dispersive spectroscopy （EDS） and X-ray diffraction （XRD）. The results indicate that the content of Mo- and Ni-matrix solid solution in brazing seam is increased with brazing temperature increasing， and cracks occur at the joint between brazing joint and base metal. With the increase of preservation， the content of Mo-matrix solid solution is firstly increased and then decreased， and CrB content is gradually increased， gathering in the center of weld. With the increase of preservation and brazing temperature， the shearing strength of welded joints is increased firstly and then decreased. Under the brazing process parameter of 1 180 ℃×20 min， the shearing strength of the joint reaches the maximum of 84.76 MPa， and the shear fracture is characterized by cleavage fracture， which occurs on the base matel.关键词：Mo-14Re Alloy;Ni-Cr-Si-B Solder Paste;Vacuum Brazing;Interfacial Microstructure;Mechanical Property2|0|0更新时间：2025-10-22
- “在金属材料领域，研究者通过对TA18合金进行不完全再结晶退火处理，制备出具有软硬相特征的层状结构，实现了高强度与高塑性的优异性能。”摘要：Incomplete recrystallization annealing treatment was carried out on hot-rolled TA18 sheet， and inhomogeneous microstructure with the characteristics of soft and hard phases was successfully obtained. Subsequently， lamellar TA18 titanium alloy with high strength and plasticity was fabricated through cold-rolling at room temperature， and the microstructure and mechanical properties of alloy were explored. The results indicate that the specimen with a thickness of 2.4 mm exhibits desirable performance after 700 ℃×3 h annealing + cold rolling treatment， where the tensile strength is 891 MPa and elongation reaches up to 15.6%. Therefore， the lamellar structure effectively retains the excellent plasticity specific to the recrystallized microstructure， leading to excellent strength and plasticity.关键词：High Strength and Plasticity;Cold Processing Technology;Microstructure;Mechanical Properties2|0|0更新时间：2025-10-22
Research·Alloy Process
- “在快硬硅酸盐水泥环境中，A356与6061铝合金的腐蚀行为及机理被系统探讨。研究发现，优化合金成分、调整加工工艺及采用表面防护措施，可有效提升铝合金的耐蚀性能。”摘要：Corrosion behavior and mechanisms of A356 and 6061 aluminum alloys in a rapid-hardening silicate cement environment were systematically investigated. As-cast A356 alloy and as-extruded 6061 alloy before and after anodizing were selected to analyze the microstructure evolution and corrosion layers through immersion experiments with varying durations. The results indicate that as-cast A356 alloy is prone to local corrosion due to the coarse and unevenly distributed secondary phase， resulting in a higher corrosion rate. In contrast， the as-extruded 6061 alloy exhibits lower corrosion rate and thinner corrosion layer on the condition owing to reduction of secondary phase content and improvement of microstructural uniformity. Furthermore， anodizing leads to a dense Al2O3 protective layer on the surface， significantly enhancing the corrosion resistance. Therefore， the corrosion resistance of Al alloys in alkaline rapid-hardening cement environments can be effectively improved by optimizing alloy composition， regulating processing parameters， and utilizing surface protection strategies . In practice， direct contact between Al alloys and cement materials should be refrained to reduce corrosion risk.关键词：Aluminum Alloys;Corrosion Resistance;Alkaline Cement2|0|0更新时间：2025-10-22
- “在材料科学领域，研究人员采用“中频熔炼+均匀化退火+热挤压”工艺制备了低Sn含量Cu-Ni合金，通过EBSD、XRD、SEM、TEM和拉伸测试研究了合金的微观组织和力学性能。发现Ni、Sn质量比增大可提高合金的抗拉强度、屈服强度和伸长率，为合金性能优化提供新思路。”摘要：Cu-Ni alloys with low-Sn content and different mass ratios of Ni to Sn were prepared using "medium frequency melting + homogenization annealing + hot extrusion" process. The microstructure and mechanical properties of alloys were investigated using electron backscatter diffraction （EBSD）， X-ray diffraction （XRD）， scanning electron microscopy （SEM）， transmission electron microscopy （TEM）， and tensile testing. The results indicate that as mass ratio of Ni to Sn rising from 2.5 to 10， the lattice constant and the size of recrystallized grains are decreased， and the amount of γ phase precipitated at grain boundaries are increased. With w（Ni）/w（Sn） of 10， the tensile strength， yield strength and elongation of alloy are 486 MPa， 293 MPa and 49.6%， respectively. The tensile strength and yield strength are increased by 28.6% and 60.1%， respectively， compared to those of ones with w（Ni）/w（Sn） of 2.5， while maintaining desirable plasticity. The increase mass in ratio of Ni to Sn enhances the solid solution strengthening effect of the alloy， and γ phase precipitated at grain boundaries promotes the refinement of recrystallized grains， contributing to grain refinement strengthening. The improvement in strength is attributed to the synergistic effects of solid solution strengthening， grain refinement strengthening， and dislocation strengthening， and grain refinement strengthening plays a dominant role.关键词：Cu-Ni-Sn Alloy;Mass Ratio of Ni to Sn;Microstructures;Mechanical Properties2|0|0更新时间：2025-10-22
- “在铝合金搅拌摩擦焊接领域，研究了不同旋转速度对接头微观组织和力学性能的影响，发现热输入量增加时再结晶比例升高，晶粒尺寸减小，为焊接工艺优化提供参考。”摘要：The microstructure and mechanical properties of 2024 aluminum alloy stirring friction welded joints under different rotational speeds were investigated by electron backscatter diffraction， digital image correlation technology and scanning electron microscope. The results indicate that as heat input rises from 600 r/min to 800 r/min， the recrystallization ratio of weld nugget zone and therm-mechanically affected zone presents an increasing trend， and the average grain size is decreased with the increase of the recrystallization ratio. However， when the heat input reaches up to 1 000 r/min， the recrystallization ratio of weld nugget zone and therm-mechanically affected zone is reduced due to the adhesion phenomenon， and the average grain size becomes larger compared to that with ω=800 r/min. with ω= 600 r/min. The joint exhibits the maximum tensile strength of 456.8 MPa， and the softening of heat-affected zone is attribrtted to the fracture of the joint near the interface between the heat-affected zone at the forward side and base metal， which is characterized by quasi cleavage fracture. The hardness of cross-section of joint is distributed in a "W" shape，and the highest hardness of 178.0 HV can be observed in nugget zone.关键词：2024 Aluminum Alloy;Friction Stirring Welding;Microstructure Evolution;Mechanical Properties2|0|0更新时间：2025-10-22
Research·Alloy Performance
- “在材料连接领域，研究者采用摩擦焊技术成功实现大直径45钢与2A12铝合金异种金属的有效连接，通过多种检测设备分析焊接接头性能，为异种金属连接提供新方案。”摘要：Friction welding technology was employed to effectively connect the dissimilar metals of large-diameter 45 steel and 2A12 aluminum alloy bar. The interface characteristics， tensile strength， hardness and other properties of welded joint were analyzed by SEM， EDS， metallographic microscope， tensile testing machine， hardness tester. The results indicate that element diffusion occurs at the interface of aluminum/steel dissimilar welded joints without defects， generating the intermetallic compounds containing FeAlx phase with thickness of 1~4 μm. The tensile properties of welded joints in different region are diverse， where the tensile strength of specimen along radial R/3 zone reaches the maximum of 39 MPa， while that along the radial outside of weld section is more than twice of that in the inner center zone， and the fracture occurs at the welding joint. The hardness values at the weld interface present an obvious step in the range of -0.4~+0.2 mm， which is the main area affected by friction heat and deformation， where the hardness value is higher than that of base. The increase of hardness on aluminum alloy side is more significant than that on the steel side with wider variation region， which is about 20% higher than that of base， while hardness on 45 steel side is about 10% higher than that of base.关键词：Dissimilar Metals;Friction Welding;Microstructure;Mechanical Property;Intermetallic Compounds0|0|0更新时间：2025-10-22
- “在材料科学领域，研究人员采用等离子熔覆技术在Q235合金表面制备出TiC-Ti（CN）颗粒增强的铁基复合熔覆层，显著提升了硬度、耐磨性和耐腐蚀性能。”摘要：Plasma cladding technology was employed to successfully fabricate TiC-Ti（CN） particle-reinforced Fe-based compound cladding layer on the surface of Q235 alloy with TiC and Fe-based powders as cladding materials and nitrogen gas as protective and reactive atmosphere. The influence of TiC on phase composition， microstructure， hardness， wear resistance， and corrosion resistance of Fe-based cladding layer was systematically investigated using X-ray diffraction， scanning electron microscopy， microhardness testing， friction and wear testing， and electrochemical analysis. The results demonstrate that the compound cladding layer consists of α-Fe（Cr）， Fe₃C， Cr₂₃C₆， TiC， and Ti（CN） phases. With TiC content increasing， the relative proportions of TiC， Cr₂₃C₆， and Ti（CN） in the cladding layer are significantly enhanced， along with a gradual enlargement of particle size. Cross-sectional images reveal a fusion zone between cladding layer and substrate， indicating robust metallurgical bonding， and TiC and Ti（CN） particles are dispersively distributed throughout the matrix. The hardness， wear resistance， and corrosion resistance of cladding layer are significantly enhanced with TiC content increasing.关键词：Plasma Cladding;Particle-reinforce;TiC;Corrosion Resistance;Wear Resistance2|0|0更新时间：2025-10-22
Research·Composites
- “在一体式车体低压铸造工艺领域，专家设计并优化了工艺方案，显著提升了铸件力学性能，满足设计要求。”摘要：Taking integrated vehicle body as object， a low-pressure casting process scheme was designed， and the initial gating system was simulated and optimized by MagmaSoft software. The results indicate that the optimized process scheme can eliminate casting defects and significantly improve the mechanical properties of castings， meeting design requirement.关键词：Integrated Vehicle Body;Numerical Simulation;Low Pressure Casting;Process Optimization2|0|0更新时间：2025-10-22
- “铝合金电机壳后端盖压铸工艺开发，通过优化浇道和冷却系统，有效改善气孔问题，降低废品率。”摘要：Die-casting process of back end cover of aluminum alloy motor shell was developed. The pouring channel was reasonably arranged according to the product structure in the early stage， and the filling and solidification of gating system were analyzed by numerical simulation software. It is found that the pores are difficult to control in the actual production process. Based on the product structure， different solutions are adopted for different areas. For the thin-walled positioned pores unable to arrange slag at the product end， inserting parts and increasing wall thickness were utilized for exhaust to improve the fluidity of aluminum liquid. For the dense thick-walled positioned pores at the pouring and exhausting end， enhancing the cooling rate， accelerating the local solidification and thickness of product surface dense layer can be employed to improve quality. For the thick-walled pores at the feeding inlet， the pouring and exhausting were analyzed， and local reinforcement of feeding was carried out. The trial production results indicate that the overall pores of the product were improved by adopting the optimized solution， and the scrap rate is reduced.关键词：Motor Shell Rear Cover;Die-Casting Process;Numerical Simulation2|0|0更新时间：2025-10-22
Application·Die Casting
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