最新刊期
卷 45 ， 期 12 ， 2025
- “在金属材料加工领域，低温处理技术通过引入孪晶、相变等缺陷，显著提升合金强度，为性能优化提供新思路。”摘要：As an innovative metal processing technique， cryogenic treatment not only enhances the deformation and processing efficiency of material， but also introduces deformation defects such as twinning， phase transformation， and stacking faults during processing， significantly strengthening the alloy， which attracts widespread attention due to the advantages of low cost， simplicity， and high forming efficiency. Applications of cryogenic rolling and deep cryogenic treatment in multi-principal element alloy and other conventional alloys were reviewed， and the effects of cryogenic treatment on microstructure and mechanical properties were analyzed. Research progress in the microstructure and properties of various alloys under cryogenic treatment was summarized. Different cryogenic treatment techniques were compared to reveal the potential in improving the strength-ductility balance of alloys， providing new insights for performance optimization of metallic materials.关键词：Cryogenic Rolling;Subzero Treatment;Multi-principal element alloy;Strength-ductility Balance5|1|0更新时间：2025-12-18
- “在铝合金领域，研究了等温热处理对ZC63-0.1Cr合金非枝晶组织的影响，为制备半固态坯料提供解决方案。”摘要：Semi-solid billets of ZC63-0.1Cr-xV（x=0， 0.1%， 0.2%， 0.3%， 0.4%， 0.5%，in mass fraction） alloy were prepared by isothermal heat treatment. Effects of V content and isothermal heat treatment on non-dendrite structure of ZC63-0.1Cr alloy were investigated. The results indicate that the average size and shape factor of solid particles are decreased firstly and then increased with the increase of V content under constant isothermal heat treatment temperature and time. Desirable semi-solid non-dendritic structure can be obtained with V content of 0.4% under treatment of 600 ℃×30 min， where the average particle size is 36.15 μm with the shape factor of 1.57， and the solid fraction of 66%. The evolution process of non-dendrite structure is divided into three stages： Initial coarsening of non-dendrite， separation and spheroidization of solid particles， and consolidation and ripening of solid particles.关键词：ZC63-0.1Cr Alloy;Isothermal Heat Treatment;Semi-solid Non-dendrite Structure4|0|0更新时间：2025-12-18
Current Recommendation
- “挤压铸造技术发展迅速，新技术不断涌现，自动化智能化水平提高，材料应用领域拓宽，未来将聚焦复合挤压铸造等方向。”摘要：As a forming technology， squeeze casting has made great progress in recent years. The scope of the process technology has been continuously broadened， and new technologies such as high-speed injection， stepped pressure holding， squeeze casting with sand core， and hybrid casting HDFC with integrated low-pressure casting advantages have emerged. The degree of automation and intelligence of technical equipment has been significantly improved， and nearly 300 sets of automatic squeeze casting units have been used in China. In terms of materials， while maintaining the focus on aluminum alloys， it continues to expand to magnesium alloys， steel materials， especially composites. The application field is constantly expanding， and there are a large number of successful applications in automobiles， bicycles， high-speed rail， military industry， aerospace and other fields. The main development directions in the future were proposed as follows： Compound squeeze casting，ultra-high pressure squeeze casting， special materials for squeeze casting and multi-functional squeeze casting.关键词：Squeeze Casting;Molten Metal Die Forging （MMDF）;Technical Equipment6|1|0更新时间：2025-12-18
Research·Review
- “在铝合金转向节制造领域，专家采用正交试验与信噪比分析，优化浇注工艺参数，显著改善铸件缺陷和枝晶臂间距。”摘要：Taking a certain aluminum alloy steering knuckle as object， orthogonal experimental design and signal-to-noise ratio analysis method were used to investigate effects of three key factors， including pouring temperature， mold preheating temperature， and cooling water temperature， on the volume of internal porosity and shrinkage cavities， as well as secondary dendrites arm spacing in the castings. The casting process parameters were optimized by ProCAST software， and the results reveal that with pouring temperature of 700 ℃， mold preheating temperature of 320 ℃， and cooling water temperature of 30 ℃， the defects of internal porosity and shrinkage cavities in the castings as well as secondary dendrite arm spacing can be significantly improved.关键词：Aluminum Alloy Steering Knuckle;Low Pressure Casting;Orthogonal Test;Signal-to-Noise Ratio;Process Optimization5|1|0更新时间：2025-12-18
- “在材料科学领域，研究者通过ProCAST软件模拟，优化了推力轴瓦合金层的离心铸造工艺，有效减少了缩孔和缩松缺陷，提高了产品质量。”摘要：ProCAST software was utilized to investigate the filling flow simulation of alloy layer of thrust bearing under vertical and horizontal centrifugal casting. The results indicate that horizontal centrifugal casting exhibits better forming effect with fewer shrinkage and porosity defects compared to vertical casting. Orthogonal experiments were conducted on horizontal centrifugal casting of bearing alloy layers at different casting temperatures， casting position offset distances， pouring speeds， and temperatures of castings. The optimized process parameters were determined as casting temperature of Babbitt alloy of 430 ℃， initial temperature of steel blank body of 320 ℃， casting position offset distance of 40 mm， and centrifugal speed of 380 r/min. The alloy layer of thrust bearing produced according to optimized process parameters is free of shrinkage or cracks with satisfied quality， meeting requirements.关键词：Large Diameter Steam Turbine;Centrifugal Casting;Thrust Bearing Alloy;Orthogonal Experiment5|0|0更新时间：2025-12-18
- “在铸件成形精度评估领域，专家提出了误差值匹配算法，构建了三位一体评价体系，显著提升了评估可靠性，为工程应用提供高效解决方案。”摘要：An error matching algorithm was proposed based on shrinkage deformation simulation， and a trinity evaluation system corresponding to point error， adjacent point error and adjacent surface error was established. Specialized algorithm programs were designed to quantitatively evaluate the simulation accuracy of castings. Aiming at the systematic errors existing in the simulation， a heuristic optimization algorithm based on deformation matching method was initially proposed to reverse compensatingly optimize each node of casting， and the overall matching error distribution was obtained， significantly improving the evaluation reliability for dimensional accuracy of casting. The comparison results indicate that direct adoption of corresponding error index of simulated nodes exhibits higher computational efficiency and engineering applicability.关键词：Casting Simulation;Dimensional Accuracy;Thermal Stress Deformation;Heuristic Optimization2|0|0更新时间：2025-12-18
Research·Computer Application
- “在材料科学领域，研究者通过激光选区熔化技术制备GH4169合金，揭示了其组织演化和裂纹扩展机制，为合金性能优化提供新思路。”摘要：In-situ fatigue experiments of heat-treated GH4169 superalloy prepared by selective laser melting were carried out by scanning electron microscope （SEM） at room temperature to investigate microstructural evolution. The results indicate that cracks are originated from the twin boundary in a single-crack initiation mode. When the minor cracks propagate and meet other twin boundaries， the secondary cracks are formed at twin boundary， carbides， slip bands and original defects at the front end of the crack， and the primary cracks are merged with the secondary cracks and expanded to fracture. The grain orientation of specimen is unevenly distributed in different regions， which varies greatly in the non-complete recrystallization， grain boundary and carbide region. The minor crack initiation and slow expanding zone are fluctuated around 10-2 μm/cycle， and the grain boundaries can hinder the crack expansion.关键词：Additive Manufacturing;GH4169 Superalloy;Low Cycle Fatigue;Minor Crack;Fracture Mechanism2|0|0更新时间：2025-12-18
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Microstructure and Properties of LAMed Nickel-based Alloys by Synergistic Regulation of W and Ti， Al AI导读
“在激光增材制造领域，研究人员通过调整IN738LC合金中Ti、Al和W含量，成功抑制了裂纹产生，并优化了材料的力学性能。”摘要：In order to solve crack formation in IN738LC alloy by laser additive manufacturing， a design thought was proposed to reduce Ti and Al content and enhance W content. Al and Ti contents in IN738LC were reduced to 2.85% and 2.49%， respectively， and specimens with different W contents were prepared to investigate microstructure and mechanical properties. The results indicate that as-deposited grain is refined with the increase of W content， and the proportion of γ′ phase is increased without cracks. When W content exceeds 6.83%， harmful P phase is precipitated. As W content rises， the tensile properties of specimens at room temperature and 900 ℃ are increased firstly and then decreased， reaching desirable effects with W content of 6.03%， where the yield strength， tensile strength and elongation reach 1 008 MPa， 1 273 MPa and 15.3% at room temperature， respectively， and 414 MPa， 523 MPa and 8.5% at 900 ℃ after heat treatment.关键词：Laser Additive Manufacturing;Nickel-based Alloys;Mechanical Properties;Microstructure2|0|0更新时间：2025-12-18
Research·Additive Manufacture
- “在材料科学领域，研究人员采用搅拌铸造法制备了TiN纳米颗粒增强铝基复合材料，并通过多种实验手段研究了TiN纳米颗粒的增强作用及复合材料的腐蚀行为。结果表明，当TiN颗粒添加量为0.2%时，合金综合性能最优。”摘要：TiN nanoparticle-reinforced aluminum matrix composites were successfully prepared by stir casting method， and the reinforcing effect of TiN nanoparticles and corrosion behavior of the composites were investigated by metallographic microscopy， hardness testing， polarization curves， impedance spectrograms， immersion experiments， and scanning electron microscopy. The results indicate that the grain refinement effect on α-Al exhibits excellent with 0.3% TiN particles addition， where the grain size is 56.8 μm， and the hardness reaches the maximum of 59.6 HB. Moreover， the composites exhibit desirable corrosion resistance with 0.2% TiN particles addition. TiN particles are evenly distributed in composites with 0.3% TiN particle addition， and cauliflower-like corrosion products can be observed， while partial dense corrosion product can hinder the entry of corrosive ions. In conclusion， the comprehensive performance is satisfied with 0.2% TiN addition.关键词：Aluminum Matrix Composites;TiN;Nanoparticle Reinforcement;Corrosion Electrochemistry2|0|0更新时间：2025-12-18
- “在材料科学领域，研究人员采用超声和机械振动耦合场辅助原位合成技术、挤压铸造技术制备了免热处理Al3Ti/Al-Mg-Mn复合材料，研究了振动和压力场作用下不同Ti含量对Al3Ti/Al-Mg-Mn复合材料的显微组织和力学性能的影响。结果表明，Al3Ti/Al-Mg-Mn复合材料中Al3Ti颗粒呈方块状，分布较均匀。复合材料的抗拉强度和屈服强度随着Ti含量的增加而提高，伸长率有所降低，这是由于Al3Ti引起的晶粒细化和第二相强化作用所致。此外，Al3Ti导致合金孔隙率增加，并在拉伸过程中作为裂纹源，使复合材料塑性下降。Ti含量为3%的复合材料具有理想的力学性能，其抗拉强度为282 MPa，屈服强度为162 MPa，伸长率为15.5%。”摘要：Heat-free treated Al3Ti/Al-Mg-Mn composites were prepared by ultrasonic and mechanical vibration coupled field assisted in-situ synthesis technology and squeezing casting， and influence of different Ti contents on microstructure and mechanical properties of Al3Ti/Al-Mg-Mn composites under the action of vibration and pressure field was investigated. The results indicate that Al3Ti particles present blocky and evenly distributed in Al3Ti/Al-Mg-Mn composites. With the increase of Ti content， the tensile strength and yield strength of composites are increased， while elongation is decreased， which is mainly attributed to the grain refinement and second phase strengthening induced by Al3Ti. Moreover， Al3Ti leads to the increase of porosity in the alloy， which acts as crack source during the tensile process， resulting in the decline of toughness. The composites with 3% Ti content exhibit excellent mechanical properties， where the tensile strength， yield strength and elongation reach 282 MPa， 162 MPa， and 15.5%， respectively.关键词：Heat-free Treatment;Al3Ti Reinforcement Phase;Composites;Mechanical Properties;Microstructure2|0|0更新时间：2025-12-18
Research·Composites
- “在材料科学领域，研究人员采用UN-100交流电阻对焊设备，成功焊接Q235低碳钢和6061铝合金棒材。通过正交试验优化工艺参数，发现圆锥台端面、氩气保护和添加锌作为过渡层可显著提高焊接接头性能，抗拉强度可达172 MPa。”摘要：UN-100 AC resistance butt welding equipment was utilized to weld Q235 low carbon steel and 6061 aluminum alloy bar with a diameter of 10 mm. The range of process parameters was determined through preliminary experiments， and several orthogonal experiments were conducted to understand relatively excellent welding process parameters. The effects of end surface form， protective gas and transition layer metal on the microstructure and properties of aluminum-steel bar joints were investigated by means of metallographic microscope， microhardness tester and universal testing machine. The results indicate that with the welding power of 41 kW， welding time of 1.1 s， and pressure time of 0.2 s， excellent performance of aluminum-steel butt welding joint can be achieved， and the maximum tensile strength can reach 149 MPa， which is about 77% of that of 6061 aluminum alloy resistance butt welding joints. Moreover， mechanical properties are improved after adopting cone end face and adding argon gas protection with zinc as intermediate transition layer， and the tensile strength reaches 172 MPa with the cone end face diameter of 7 mm， which is about 89% of that of 6061 aluminum alloy resistance butt welding joints. Zn transition layer leads to the enhancement of tensile strength and hardness of welded joints， while Cu transition layer is unable to effectively inhibit the formation of Al-Fe intermetallic compounds at the interface， resulting in a reduction in tensile strength of welded joints.关键词：Resistance Butt Welding;Process Parameters;Mechanical Properties;Transition Layer2|0|0更新时间：2025-12-18
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Temperature Range Optimization and Determination of High Temperature Pre-aging for AlZnMgCu Alloy AI导读
“在材料科学领域，专家通过连续升温法测定AlZnMgCu合金电导率变化，确定了高温预时效的最佳温度区间，为提升合金耐腐蚀性能提供解决方案。”摘要：High-temperature pre-treatment（HTPT） can effectively improve the corrosion resistance of AlZnMgCu alloy with simple process， which is suitable for industrial production. However， there is a lack of investigation on the determination for temperature range of key parameters. On this basis， adopting a continuous heating method after solid solution quenching was proposed to obtain the variation curves conductivity with heating temperature. Starting from the perspective of conductivity and heterothermy treatment， the temperature range for HTPT was measured and verified. The results indicate that the conductivity is rapidly decreased through the highest point and enters a relatively flat area， starting at T1 temperature and ending at T2 temperature， and temperature range of HTPT is between T1 and T2. The temperature range for HTPT of Al-8.56Zn-2.29Mg-2.49Cu-0.13Zr is 430~445 ℃， and the temperature of HTPT treatment below 430 ℃ leads to a significant reduction in mechanical properties.关键词：High Temperature Pre-treatment;AlZnMgCu;Corrosion Resistance Performance;Conductivity4|0|0更新时间：2025-12-18 - “在铝合金薄壁多筋结构件成形领域，专家基于响应面法-中心复合设计模拟试验方案，优化工艺参数，有效降低铸件缩松率，为解决成形困难问题提供解决方案。”摘要：To address the challenges of forming thin-walled multi stiffened aluminum alloy components and slow cooling at thick-walled area leading to cavities， a simulation scheme was proposed based on RSM-CCD， and effects of key process parameters including mold temperature， pouring temperature， and injection speed on casting quality was systematacially investigated to identify the optimal parameter combinations to eliminate defects. CAE and Response Surface Method （RSM） were employed to achieve numerical and accurate prediction of shrinkage defects， and a statistical framework was constructed through Analysis of Variance （ANOVA） regression techniques. The results indicate that the shrinkage rate is reduced to 3.47% with mold temperature of 205.58 ℃， alloy temperature of 666.05 ℃， and injection speed of 2.625 m/s. Validiation was carried out on AW-DCM-3501 die casting machine under mold temperature of 205 ℃， pouring temperature of 670 ℃， and injection speed of 2.6 m/s， and X-ray inspection reveals that the castings are free of defects， confirming the reliability of model through the combination of numerical simulations and experiment.关键词：Thin Al Alloy;Numerical Simulation;Process Optimization;Die Casting2|0|0更新时间：2025-12-18
- “在铝合金领域，研究人员采用半固态受控扩散凝固技术和触变成形技术制备Al-8Si合金，发现触变合金冲击性能显著提高，为铝合金应用提供新思路。”摘要：Al-8Si alloy was prepared by semi-solid controlled diffusion solidification technology （CDS） and thixoforming technology， and the microstructure evolution of as-cast， CDS and thixotropic alloy as well as the correlation with impact behavior was investigated comparatively. Microstructure and impact energy of alloys were tested and characterized by OM， XRD， SEM and Charpy impact tests. The results indicate that as-cast alloy is composed of coarse α-Al dendrites and needlelike eutectic silicon， and CDS alloy is composed of spherical α-Al and needlelike eutectic silicon， while thixotropic alloy exhibits spherical α-Al and short rod-like eutectic structure. The impact property test results reveal that the thixotropic alloy exhibits the highest impact energy （13.2 J）， which is 523% higher than that of as-cast one. The excellent impact toughness is mainly attributed to the spheroidization of eutectic silicon.关键词：Al-8Si Alloy;Controlled Diffusion Solidification;Thixoforming;Microstructure;Impact Properties2|0|0更新时间：2025-12-18
Research·Alloy Process
- “在材料科学领域，研究揭示了Ce含量对Al-4.5Si-0.35Mg合金显微组织和耐蚀性能的影响，发现添加0.1%Ce的合金具有最优耐蚀性能。”摘要：The effects of Ce content on the microstructure and corrosion resistance of Al-4.5Si-0.35Mg alloy were investigated. The results indicate that the grain size is decreased firstly and then increased with the increase of Ce content， and the sizes of eutectic Si phase and Fe-rich phase are reduced obviously. Intergranular corrosion results reveal that the corrosion depth of alloy is about 757 μm， which is declined significantly after Ce addition， and the alloy containing 0.1% Ce exhibits minimum corrosion depth， which is 414 μm. The electrochemical results demonstrate that the corrosion resistance of the alloy containing 0.1% Ce is desirable， where the current density is decreased notably from 0.589 μA/cm2 to 0.371 μA/cm2 compared to those of ones without Ce addition， and obvious passivation zone appears in the polarization curves with increscent arc radius of reactance and resistance， leading to the great enhancement of corrosion resistance. It is concluded that the improvement of corrosion resistance of Al-4.5Si-0.35Mg alloy is mainly attributed to the formation of dense oxide film and reduction of size and quantity of cathode phase caused by microstructure modification.关键词：Al-Si-Mg Alloy;Ce Content;Microstructure;Corrosion Behavior3|0|0更新时间：2025-12-18
- “超声波对异种铝合金激光焊接接头组织、织构和力学性能的影响研究取得进展，为提高焊接接头性能提供新途径。”摘要：The effects of ultrasonic on the microstructure， texture and mechanical properties of 6061-T6/5052-H32 laser welded joint of dissimilar aluminum alloy were investigated by means of optical microscope， scanning electron microscope and tensile testing machine. The results indicate that equiaxed columnar crystals are generated in the middle of core zone， while slender columnar crystals can be observed at the edge. The increase of ultrasonic amplitude is helpful for the flow of molten pool in the welding core zone， leading to significant area increace at the bottom of welding core zone. Meanwhile， the grain size at the center area is increased firstly and then decreased. The texture of the weld core zone are characterized by recrystallization textures due to occurrance of recrystallization. The performance of the joint is desirable with the ultrasonic amplitude of 20%， where the tensile strength and elongation are 175 MPa and 6.6%， respectively， and the tensile strength is 6.7% higher than that of the joint without ultrasonic.关键词：Laser Welding;Aluminum Alloy;Ultrasonic Wave;Mechanical Properties2|0|0更新时间：2025-12-18
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Effects of Al-La-Ce Master Alloy on Microstructures and Properties of Recycled A356 Aluminum Alloy AI导读
“在铝合金领域，研究者采用真空感应熔炼法制备Al-La-Ce中间合金，发现适量添加可改善再生铸造A356铝合金的微观结构、硬度及拉伸性能。”摘要：Al-La-Ce master alloy was prepared through vacuum induction melting furnace， and effects of different Al-La-Ce master alloy additions on microstructure， hardness and tensile properties of recycled A356 aluminum alloy were investigated by X-ray diffractometre（XRD）， metallographic microscope（OM）， scanning electron microscope（SEM+EDS）， microhardness tester， universal tensile testing machine tester. The results indicate that proper addition of Al-La-Ce master alloy achieves a certain degree of refinement effect. The grains of aluminum alloy specimens are fine and uniform with 0.6% Al-La-Ce addition， and the secondary dendrite arm spacing in the matrix is minimized. Meanwhile， the microhardness is increased with numerous ductile dimple structures on the tensile fracture， and tensile strength and elongation of the alloy are enhanced.关键词：Al-La-Ce Master Alloy;A356 Alloy;Refinement;Microstructure;Mechanical Properties2|0|0更新时间：2025-12-18 - “在铝合金薄壁件制造领域，复合细化剂显著降低晶粒尺寸，减少缩松缺陷，提高凝固质量，为解决缩松问题提供新思路。”摘要：The effects of composite refiner （K2TiF6、KBF4、NaCl and KCl） on grain size， secondary dendrite arm spacing （SDAS）， shrinkage defects and solidification characteristics of ZL114A alloy thin-walled parts with different wall thicknesses were investigated. The results indicate that with the wall thickness rising from 3 mm to 6 mm， the average grain size of thin-walled parts is increased from 514.2 μm to 1 018.6 μm with SDAS increased from 24.6 μm to 39.1 μm， meanwhile the tendency of shrinkage defects is increased， and the solid fraction of dendrite coherency point （
- “在材料科学领域，专家建立了钢珠冲击钛合金板仿真模型，探索了不同旋转形式对冲击损伤的影响，为钛合金板能量吸收研究提供新方向。”摘要：A simulation model of steel ball impact on titanium alloy plates was established using finite element software， and the rationality of parameters and analysis methods was verified through simulation and experiments. The effects of different rotation modes and rotation speeds on impact damage were analyzed. The results indicate that as the rotation speed rises， the residual speed values of steel balls have little difference， while the dissipated energy caused by plastic deformation of titanium alloy plate shows a slight reduction and then stabilization. The tearing failure mode of titanium alloy plate is related to rotation speed and direction， which hardly affects the energy absorption of titanium alloy plate during the impact process due to the minor dissipated energy caused by crack formation.关键词：TC4 Titanium Alloy;Steel Ball Rotation;Damage Characteristics2|0|0更新时间：2025-12-18
- “在高温合金领域，研究者采用多种技术手段，揭示了Ni-Cr-Co基铸造合金的组织特点和元素偏析规律，为优化合金性能提供了科学依据。”摘要：The microstructure characteristics， element segregation behavior and γ' phase precipitation of Ni-Cr-Co based cast superalloy prepared by vacuum induction melting（VIM）were investigated using optical microscope（OM），scanning electron microscopy（SEM），electron probe microanalysis（EPMA）and Thermo-Calc thermodynamic software. The results indicate that obvious dendrites and element segregation are observed in as-cast test rod. The segregation degree of elements in the dendrite and interdendrite regions is W>Mo>Cr>Co， Ti>Nb>Al， where W and Ti elements exhibit the most significant segregation， with segregation coefficients （K） of 0.44 and 2.56， respectively. After homogenization at 1 180 ℃ for 4 h， element segregation is largely eliminated. Furthermore，γ′ strengthening phase with different sizes is evenly distributed after 1 090 ℃×2 h/AC+800 ℃×16 h/AC two-stage aging treatment. Compared with the test bar position， the primary γ' phase in the thicker bottom pouring plate specimen is mainly formed in the interdendritic regions after homogenization at 1 180 ℃ and 1 230 ℃ for 4 h， while absence of primary γ' phase is precipitated in the dendrite.关键词：Cast Superalloy;Element Segregation;Homogenizing Treatment2|0|0更新时间：2025-12-18
- “在电子封装领域，研究人员采用加速老化方法研究了Co含量对Sn-3Ag-0.5Cu-xCo焊点界面化合物层的影响，发现Co元素能够促进界面层中Cu6Sn5和Cu3Sn的生长，降低焊点强度。”摘要：Sn-3Ag-0.5Cu-xCo （x=0， 0.01， 0.05， 0.1）/Cu solder joint specimens were subjected to accelerated aging at 150 ℃ for 250， 500， and 1 000 h， and high and low temperature impacts were applied. The influence of Co element on morphology and thickness of compound layer at the solder joint interface was analyzed using optical microscope and scanning electron microscop. The results indicate that Co promotes simultaneous growth of Cu6Sn5 and Cu3Sn in the interfacie layer. Moreover， Co addition leads to a loose structure in the interface layer with numerous gaps， resulting in the strength reduciton of solder joint.关键词：Sn-3Ag-0.5Cu;Interface Layer;Morphology;Accelerated Aging2|0|0更新时间：2025-12-18
- “在材料科学领域，研究者对TA1纯钛进行不同变形量下的轧制变形，揭示了其组织演变与力学性能的关系，为提高合金性能提供新思路。”摘要：TA1 pure titanium was subjected to different deformation amounts of 40%， 50%， 60% and 80%， and the microstructure evolution and mechanical properties of TA1 pure titanium were investigated. The results indicate that with the rolling deformation less than 50%， a large number of twins are generated in the structure. The plastic deformation is dominated by twins， and the strengthening method is dominated by fine grain strengthening. When the rolling deformation exceeds 50%， the majority of grain boundaries in the structure gradually become blurred， and obvious fibrous structure appears. The plastic deformation is dominated by slip， and the increase of dislocation density leads to the increase of strength. During the process of increasing rolling deformation， the strength of the alloy is increased continuously， while the variation trend of plastic is relatively stable. Absence of other phase can be observed in the structure， and the tensile fracture morphology is characterized by dimples.关键词：TA1 Pure Titanium;Deformation Rate;Structure Morphology;Tensile Properties2|0|0更新时间：2025-12-18
- “在铝合金领域，研究者采用挤压铸造技术制备了Al-5Mg-2Si-Mn合金，发现Fe元素的加入显著影响合金的微观组织和力学性能。”摘要：Microstructures and mechanical properties of Al-5Mg-2Si-Mn alloys with Fe contents less than 0.5% （in mass fraction） fabricated by squeeze casting were analyzed by SEM，EDS and tensile testing. The results indicate that Fe addition leads to the initial formation of Al15（Fe，Mn）3Si2 under 75 MPa， which emerges in the eutectic region at final solidification stage. The interlamellar space of Mg2Si in the alloys is increased with the increase of Fe content， which is mainly attributed to the retarding growth rate of Mg2Si after Fe addition. The mechanical properties of the alloy are significantly affected by interlamellar space， and the strength and elongation of alloy are increased with the interlamellar space reduction of Mg2Si. With Mg2Si interlamellar space of 0.9 μm， the tensile strength， yield strength and elongation of the alloy reach 276 MPa， 177 MPa and 9.6%， respectively.关键词：Al-5Mg-2Si-Mn Alloy;Mg2Si;Interlamellar Space;Squeeze Casting3|0|0更新时间：2025-12-18
Research·Alloy Performance
- “在铝合金铸造模具钢领域，专家分析了模具过早失效原因，为延长模具寿命提供解决方案。”摘要：Aluminum alloy die-casting steel was serviced at high temperature for long time， and the starsh working conditions shorten the service life. Failure analysis is of great significance to the die design and material selection， thus improving service life. The premature failure of aluminum alloy casting die was investigated by means of optical microscope， scanning electron microscope and X-ray diffraction， and the failure cause was analyzed. The results reveal that the large-scale metallic inclusions， thick decarburization layer （200 μm） and precipitation of intergranular carbide in the die steel are responsible for premature cracking failure.关键词：Aluminum Alloy;Cracks;H13 Die Steel;Differential Pressure Casting2|0|0更新时间：2025-12-18
- “在大型稀土镁合金壳体铸造领域，专家通过工艺设计和工装设计，成功避免了易燃易爆安全风险，获得高品质铸件。”摘要：In response to the flammable and combustible risks of large rare earth magnesium alloy shells during casting process， the risks of production processes such as melting and pouring were identified and analyzed. In the process design stage， safety measures including pouring system design， quenching system design， and flame-retardant sand design were adopted. In the tooling design stage， core bone safety design and sand box safety design were carried out. A series of technical safety measures were taken in smelting and pouring processes， and the upper limit of pouring pressure for low-pressure pouring equipment was set. The results reveal that large RE magnesium alloy shells with high quality were ahieved by adopting the safety measures， and the safety risks during low-pressure pouring process were avoided.关键词：Magnesium Alloy;Shell;Low-pressure Casting;Safety Production2|0|0更新时间：2025-12-18
- “在发动机主轴承座制造领域，专家分析生产工艺难点，优化压铸过程，并通过试验验证了产品质量稳定性。”摘要：Based on process analysis of engine main bearing housing， difficulties in development process were determined， and development process of engine main bearing housing was described， including raw material melting， die casting mold design， and die casting process. Modification treatment was adopted during the melting process of raw materials to improve mechanical properties. CAE numerical simulation was applied to optimize the filling process of die casting. The quality stability of main bearing housing was verified by inspecting internal defects and conducting strength and fatigue tests.关键词：Main Bearing Housing;Die Casting Parts;Numerical Simulation;Fatigue Test2|0|0更新时间：2025-12-18
Application·Die Casting
- “在硅溶胶涂料领域，研究揭示了硅粒径对涂料性能和型壳强度的影响，为提高型壳质量提供新思路。”摘要：The effects of different silicon particle diameters of silica sol on viscosity and suspension property of coating as well as flexural strength and scratch strength of shell were investigated. The results reveal that viscosity of coating is decreased with the increase of silica particle diameter with constant powder-liquid ratio. The suspension rate of coating is declined with the increase of silica particle diameter， and increscent with the rise of powder-liquid ratio. With the acsending of silica particle diameter， the room temperature flexural strength and residual flexural strength of the shell are gradually are reduced， while scratch strength is intensified， indicating the weakened anti-rushing ability， which is prone to slag defects.关键词：Silica Sol;Particle Diameter;Coating;Shell2|0|0更新时间：2025-12-18
Application·Investment Casting
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