最新刊期
卷 46 ， 期 3 ， 2026
- “镁合金板材成形难题一直是商用领域关注焦点。专家探索将双辊铸轧技术应用于含长周期有序结构相的Mg-Y-Zn合金，构建二维简化模型并模拟不同LPSO相含量合金的铸轧过程，分析冷却条件、轧辊转速和喷嘴温度等参数对成形性影响，为商用镁合金板材成形提供新思路。”摘要：To address the shortcoming of poor formability of commercial magnesium alloy sheets， the feasibility of applying twin roll casting （TRC） to Mg-Y-Zn （WZ） alloy sheets with long period stacking ordered （LPSO） phase was explored. A simplified 2D model was established， and finite element （FE） software was employed to simulate TRC process of alloys featuring varying LPSO contents. The influence of parameters including cooling conditions， rolling speed and nozzle temperature on rolling formability was analyzed using single-factor analysis and orthogonal experimental range analysis. The results reveal that the higher Y content results in an expanded solidification range for WZ alloy， accompanied with intensified segregation tendencies. The influence sequence on TRC formability of WZ alloy is determined as rolling speed， LPSO phase content， and nozzle temperature. Furthermore， the interplay between LPSO and nozzle temperature emerges as prominent factor. With the escalation of LPSO phase content， deformation resistance is enhanced with severe edge cracking， and the uneven distribution of equivalent strain in the core region is exacerbated， intensfying the cracking tendency.关键词：Mg Alloy;Twin Roll Cast;Finite Element;LPSO;Processing Optimization3|0|0更新时间：2026-03-24
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Effects of Induction Heating Rotary Swaging on Microstructure and Properties of Mg-Zn-Y-Nd Alloy AI导读
“介绍了其在材料加工领域的研究进展，专家对Mg-2Zn-0.5Y-0.4Nd合金进行感应加热旋锻加工，发现边部区域力学性能优于心部，为合金加工技术优化提供了新思路。”摘要：Mg-2Zn-0.5Y-0.4Nd alloy was subjected to induction heating rotary swaging at 250 ℃， and the microstructural evolution as well as strengthening mechanisms at the center and edge were analyzed comparatively under 40% and 68% deformation. The results indicate that the alloy after rotary swaging is composed of α-Mg matrix and W-Mg₃（Y，Nd）₂Zn₃ phase， whereas the coarse W phase is fragmented during deformation， which is distributed in a streamlined pattern along processing direction. Due to the radial stress gradient during rotary swaging， the edge region becomes the major deformation zone， where the degree of grain refinement and recrystallized dynamic fraction are greater than that of one at the center region. Mechanical property tests reveal that the edge region achieves superior mechanical properties， where the yield strength， tensile strength， and elongation reach up to 338 MPa， 364 MPa， and 12.6%， respectively， under 68% deformation， which are significantly higher than those of the center region （315 MPa， 330 MPa， and 6.2%）. Meanwhile， the edge region maintains desirable ductility， presenting excellent strength-ductility synergy. The results indicate that induction-heating rotary swaging can significantly enhance mechanical properties of Mg-2Zn-0.5Y-0.4Nd alloy， in spite of significant heterogeneity remaining in microstructure and performance.关键词：Mg-2Zn-0.5Y-0.4Nd Alloy;Rotary Swaging;Mechanical Properties;Microstructure2|0|0更新时间：2026-03-24 -
Effects of Pulsed Magnetic Field on Hot Tearing Susceptibility of Mg-9Gd-3Y-0.5Zr-0.5Ag-0.1Zn Alloy AI导读
““T”型铸造模具配备脉冲磁场装置，显著降低VW93-0.5Ag-0.1Zn合金热裂倾向性，细化晶粒，改变第二相形貌，提升补缩能力。”摘要：Effects of pulsed magnet field on hot tearing susceptibility of Mg-9Gd-3Y-0.5Zr-0.5Ag-0.1Zn （VW93-0.5Ag-0.1Zn） alloy was investigated using a “T” shaped casting mold equipped with a pulsed magnetic field device. The microstructure and fracture of the alloy were characterized experimentally by optical microscopy （OM） and scanning electron microscopy （SEM）， and size of hot tearing and grain were quantified. The results reveal that the application of a pulsed magnetic field significantly reduces the hot tearing susceptibility of VW93-0.5Ag-0.1Zn alloy， which is minimized at a voltage value of 150 V. In addition， pulsed magnetic field promotes the enrichment of eutectic phase and improves the feeding ability of residual liquid phase， leading to the morphology transtormation of enriched second phase. The alloy grains are significantly refined under the action of magnetic field， which reduces the solidification shrinkage strain per unit grain boundary at the hot spot， thus degrading the hot tearing susceptibility.关键词：Mg-Gd-Y Alloys;Pulsed Magnetic Field;Hot Tearing Susceptibility;Eutectic3|0|0更新时间：2026-03-24 - “揭示了稀土元素钆（Gd）含量对Mg - Gd合金关键性能的调控机制与影响规律，为合金性能优化提供理论依据。”摘要：The regulatory mechanism and influence law of rare earth gadolinium （Gd） content on the key properties of Mg-Gd alloys were reviewed. In terms of mechanical properties， there is a critical threshold for Gd content to achieve synergistic optimization of strength and plasticity. Below the threshold， Gd can enhance strength and plasticity through both solid solution strengthening and texture weakening. After exceeding the threshold， the strength is significantly improved due to the precipitation of strengthening phases during aging， while the plasticity is deteriorated sharply， leading to an imbalance of strength and toughness. The microstructure evolution exhibits nonlinear characteristics， where medium Gd content can maximize the grain refinement effect and promote the uniform and dipersive distribution of the second phase， while ultra-high Gd content can easily induce continuous network brittle phases at grain boundaries， disrupting the continuity of the matrix. Meanwhile， high solute enrichment may inhibit nucleation， resulting in grain coarsening. Regulation of Gd，Y mass ratio in multicomponent alloys plays a decisive role in phase composition and refinement mechanism. The corrosion resistance is controlled by microstructure uniformity and morphology of the second phase， where alloys with low or medium Gd content exhibit optimal corrosion resistance due to the uniform microstructure and dense Gd（OH）3 protective layer， while ultra-high Gd content constructs a corrosion barrier through a network Mg5Gd phases， significantly enhancing the barrier effect. In addition， the corrosion resistance of as-extruded alloys is generally superior to that of as-cast alloys.关键词：Mg-Gd Alloy;Mechanical Properties;Microstructure;Corrosion Resistance;Rare Earth Elements3|0|0更新时间：2026-03-24
- “基于ZBYT500多功能液态成型装备，采用间接挤压铸造工艺制备了ZM5镁合金隔板件，重点探究了铸态及热处理态下铸件的微观组织与力学性能演变。同时，对挤压铸造过程中产生的宏观偏析缺陷进行了系统表征与分析，研究了其形成机理、偏析区组织性能特征及其影响机制，并提出了相应的减控措施。结果表明，铸态试样的抗拉强度和伸长率分别为181.57 MPa和6.5%，经热处理后分别提升至287.9 MPa和10.8%。隔板件内偏析主要集中于壁厚突变区域。偏析的根本原因是Al元素的大量富集，而T6热处理工艺通过促进元素扩散，可有效减轻材料的偏析现象。”摘要：ZM5 magnesium alloy spacer parts was facilitated using indirect squeeze casting process by ZBYT500 multifunctional liquid molding equipment， focusing on the microstructure evolution and mechanical properties of as-cast and heat-treated castings. Additionally， the macroscopic segregation defects formed during squeeze casting process were systematically characterized and analyzed. The formation mechanisms， structure and performance characteristics and influence mechanisms were investigaterd， and corresponding reduction and control measures were proposed. The results indicate that the tensile strength and elongation of as-cast specimens reach up to 181.57 MPa and 6.5%， which is significantly increased to 287.9 MPa and 10.8% ， respectively， after heat treatment. The segregation in the spacer is predominantly concentrated in areas with thick-walled variations， which is attributed to the substantial enrichment of Al element. Moreover， T6 heat treatment process effectively relieve the segregation phenomenon by promoting elemental diffusion.关键词：Squeeze Casting;Magnesium Alloy;Microstructure;Mechanical Properties;Segregation3|0|0更新时间：2026-03-24
- “介绍了其在镁合金加工领域的研究进展，专家探索了室温旋锻与时效热处理对VW93镁合金显微组织及力学性能的影响，为镁合金性能优化提供了新思路。”摘要：The effects of room-temperature rotary swaging （RS） and aging heat treatment on the microstructure and mechanical properties of as-extruded VW93 magnesium alloy （Mg-9Gd-3Y-0.5Zr， mass fraction， %） were systematically investigated. The results indicate that room-temperature RS can introduce dislocations and deformation twins， where the density is increased progressively with processing passes and strain accumulation. After 6-pass RS （diameter reduction from 22.0 mm to 16.0 mm）， the average kernel average misorientation （KAM） value is increased from 0.28 of as-extruded state to 1.58， while the average grain size is refined from 22.02 μm to 12.37 μm by deformation twins. Mechanical tests demonstrate that RS significantly enhance strength， where the tensile strength and yield strength are increased from 304 MPa and 192 MPa in as-extruded state to 417 MPa and 416 MPa after 6-pass RS， respectively， whereas the elongation is decreased sharply from 12.4% to 1.3%. After peak aging at 200 ℃ for 20 h， the tensile strength and yield strength of alloy are further improved to 501 MPa and 474 MPa， accompanied by a recovery of elongation to 3.6%.关键词：VW93 Mg Alloy;Rotary Swaging;Aging Heat Treatment;Microstructure;Mechanical Properties2|0|0更新时间：2026-03-24
- “介绍了其在镁合金耐蚀性领域的研究进展，相关专家通过盐雾和电化学试验，验证了控制铸造缺陷和表面状态可提高Mg-3Nd-2Gd-Zn-Zr镁合金耐蚀性，为提高镁合金铸件表面质量和耐蚀性提供了新思路。”摘要：The corrosion resistance of magnesium alloy can be further improved without altering composition and phase structure of the alloy by controlling casting defects and surface state. Salt spray and electrochemical experiments were conducted to systematically evaluate the effects of slag and porosity defects during the casting process of a new magnesium alloy， as well as different surface states caused by mechanical processing， polishing， and grinding， on the corrosion resistance of the alloy in artificial ocean. The results confirm that the casting defects indeed reduce the corrosion resistance of alloy. Meanwhile， the smoother surface obtained by polishing and grinding exhibits worse corrosion resistance. The results indicate that combination of additives with surface mechanical treatment can simultaneously improve the surface quality and surface corrosion resistance of novel magnesium alloy casting.关键词：Magnesium Alloy;Casting Defects;Corrosion Resistance2|0|0更新时间：2026-03-24
Topic·Rare Earth Magnesium Alloy
- “镁基复合材料领域迎来新突破，研究团队采用半固态注射成形技术成功制备GNPs增强AZ91D镁基复合材料，发现0.5% GNPs含量时，材料晶粒细化且性能显著提升，为解决GNPs分散性差难题提供有效方案。”摘要：To address the challenge of poor dispersion of graphene nanoplatelets （GNPs） in magnesium matrix composites， semi-solid injection molding was employed to fabricate GNPs-reinforced AZ91D composites， and effects of different GNP contents （0， 0.3%， 0.5%， 0.7%， mass fraction） on the microstructure and properties of the composites were systematically investigated. The results indicate that the high shear forces inherent in the semi-solid process effectively promote the uniform dispersion of GNPs. With 0.5% GNP， the composites achieve optimal grain refinement and average grain size is reduced to 8.3 μm， where GNPs are primarily distributed within the grains， forming a defect-free and strong interfacial bond with magnesium matrix. TEM analysis confirms the existence of MgO nanoparticles at the interface， playing a role of connection. Mechanical tests demonstrate that the tensile strength of 0.5% GNP specimen is significantly increased to 193.04 MPa， which is increased by 24% compared to that with unreinforced ones， while the elongation is also improved to 5.10%. With GNP content increasing to 0.7%， deteriorated dispersion occurs and performance is degraded due to the agglomeration.关键词：Semi-solid Casting;Magnesium Matrix Composites;Interfacial Structure;Microstructure and Properties2|0|0更新时间：2026-03-24
- “介绍了其在铝钢双金属铸件领域的研究进展，专家采用电火花沉积方法制备NiCu/SnCu双合金涂层，显著提高铝钢双金属剪切强度，为复合铸造铝钢双金属界面结合提供解决方案。”摘要：NiCu and SnCu coatings were sequentially prepared on the surface of 45 steel inlays by electro-spark deposition method， and aluminum/steel bimetallic castings were produced by metal mold gravity casting. The microstructure and composition of coatings and bimetallic interface were analyzed， and interfacial shearing strength was tested through scanning electron microscope， energy dispersive spectrometer， and X-ray diffractometer. The results indicate that electro-spark deposited NiCu/SnCu dual-alloy coating is contributed to the formation of metallurgical bond at the compound casting aluminum/steel bimetallic interface and effectively prevents the diffusion of elements between aluminum and steel to form brittle intermetallic compounds. At pouring temperature of 740 ℃， there exists undissolved NiCu alloy， while SnCu alloy is dissolved with the adjacent aluminum and NiCu alloy and diffused to disappear， where Al17（FeNi）4Si and （Cu，Ni）3Sn4 compounds are generated at the interface. At pouring temperature of 780 ℃， both coatings are dissolved to disappear， leading to a thin layer of Al4.5FeSi compound at the interface， which significantly improves the shearing strength of aluminum/steel bimetallic castings. At pouring temperature of 740 ℃ and 780 ℃， the shearing strength is increased from 11.5 MPa to 29.2 MPa and 43.5 MPa， respectively.关键词：Al/steel Bimetal;Compound Casting;Coating;Interfacial Structure;Mechanical Properties2|0|0更新时间：2026-03-24
- “介绍了其在巴氏合金领域的研究进展，专家探索了不同Zn含量对巴氏合金微观组织及性能的影响，为钢背/巴氏合金双金属复合材料的制备及应用提供了工艺优化方案。”摘要：Sn-11Sb-6Cu-xZn （x = 0，0.5，1.5，2.5，mass fraction，%） Babbitt alloys were fabricated by well furnace melting， and the composite process parameters for Babbitt alloy and steel backing were explored. The steel backing/Babbitt bimetallic composites were prepared by centrifugal casting. The microstructure was observed， and mechanical properties as well as wear mechanisms were analyzed. The results indicate that the size of SnSb phase is decreased with the increase of Zn content， and Cu6Sn5 phase is gradually transformed from needle-like to star-like. The optimal composite process of steel backing/Babbitt alloy bimetallic composites is determined as follows： the steel backing is preheated at 220 ℃ for 0.5 h， and sprayed with mixed solution of ZnCl2 and NH4Cl on the surface， then preheated at 300 ℃ for 2 min， finally dipped in tin pot for 2 min， and air cooled to room temperature. Friction and wear experiments reveal that the friction coefficient and fluctuation strength of Babbitt alloy are lower than that of ones after 0.5% Zn addition， and desirable wear resistance is achieved. The wear mechanism is dominated by abrasive wear， accompanied by a slight degree of adhesive wear.关键词：Babbitt Alloy;Microstructure;Tribological Properties;Composite Process;Centrifical Casting2|0|0更新时间：2026-03-24
- “采用氩弧熔覆技术在Q235钢表面制备了不同Al2O3含量的（TiC+Al2O3）/Ni复合涂层。随着Al2O3含量增加，颗粒相数量减少，其尺寸变得更加细小，M23C6碳化物沉淀增加并呈网格状；涂层的平均显微硬度先上升后下降，磨损率先减小后增大，摩擦因数逐渐减小。当Al2O3质量分数为15%时，平均显微硬度（HV0.2）达783，约为基材的5.8倍，耐磨性最好；磨损机理为轻微磨粒磨损，熔覆涂层表现出优异的摩擦学性能。”摘要：（TiC+Al2O3）/Ni composite coatings with varied Al2O3 contents were fabricated on the surface of Q235 steel by argon arc cladding technology. The phase and microstructure of coating were analyzed by X-ray diffractometer， energy spectrum analyzer and scanning electron microscope. The microhardness as well as wear resistance was tested by Vickers hardness tester and friction and wear tester. The results reveal that TiC phase in the coating is characterized by petal-like and particulate. As Al2O3 content rises， the amounts of particulate phases are reduced with refined sizes， and M23C6 carbide precipitation is increased with network shape. The average microhardness of coating is increased firstly and then decreased， and the wear rate exhibits the contrary trend， while friction coefficient is gradually decreased. With Al2O3 content of 15%， the average microhardness reaches up to 783 HV0.2， which is about 5.8 times of that of substrate， indicating disirable abrasion resistance. The wear mechanism is slight abrasive wear， and cladding coating possesses excellent tribological properties.关键词：TiC+Al2O3/Ni Composite Coating;Argon Arc Cladding;Microstructure;Wear Resistance2|0|0更新时间：2026-03-24
Research·Composites
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Simulation and Optimization Analysis of Sand Casting Process for an Annular Titanium Alloy Castings AI导读
“针对环形钛合金铸件砂型铸造易出现缩孔缩松缺陷问题，专家基于ProCAST软件优化浇冒口系统，成功转移缩孔缺陷至内浇道，为铸件质量提升提供有效方案。”摘要：To address shrinkage porosity and cavity defects commonly encountered during the sand casting of an annular titanium alloy castings， the gating and riser system was optimized using ProCAST software. Initially， the distribution patterns of hot spots and shrinkage cavity defects in the castings were identified through simulation analysis. On this basis， two kinds of preliminary design schemes were proposed， and simulation and verification were conducted subsequently. The taper and height of inner gate were adjusted according to the simulation and actural results to optimize process parameters. The production results reveal that the shrinkage cavity defects are successfully relocated to the ingate in the optimized design， and absence of significant shrinkage cavity defects are observed in the casting body.关键词：Titanium Alloy;Shrinkage Porosity and Cavity;Numerical Simulation;Process Optimization2|0|0更新时间：2026-03-24 - “介绍了其在砂型铸造领域的研究进展，专家构建了碳排放和生产约束融合的低碳调度模型，为解决低碳生产调度问题提供了有效方案。”摘要：A whole-process low-carbon production scheduling solution for sand-casting enterprises was proposed. A low-carbon scheduling model integrating carbon emission and production constraints was constructed to balance the emission reduction and efficiency. Aiming at the batch grouping problem， the process batch grouping rule based on batch rationality was proposed to measure the effectiveness. NSGA-III algorithm was utilized to solve the model， and simulation examples were designed for verification combined with the production scenario of a typical sand-casting enterprise. The results prove the reasonability of constructed model， which exhibits desirable convergence and comprehensiveness indexes in the candidate pool of 25 workpieces when using NSGA-III algorithm for solution， indicating the superiority of the algorithm in solving complex problems.关键词：Whole-process Production Scheduling;Reducing Carbon Emissions;NSGA-III Algorithm2|0|0更新时间：2026-03-24
- “介绍了其在铸造领域研究进展，专家采用AnyCasting软件建立三维有限元模型，对蜗壳压铸过程进行模拟仿真分析，通过优化浇注系统设计，显著改善了铸件的凝固补缩条件，提升了铸件内部质量和服役可靠性。”摘要：In view of actual production needs， the die-casting process of volute was simulated by AnyCasting software. A three-dimensional finite element model was established， and filling sequence， solidification sequence， and defect probability were quantitatively analyzed to evaluate influence on casting quality. Based on defect criterion analysis， the defect distribution of castings in key areas was predicted and verified to pinpoint the high incidence areas of casting defects such as shrinkage porosity， cavity， and gas entrapment. The solidification and shrinkage conditions of castings are significantly improved through optimizing the design of gating system， including improving the layout of gating system and setting up overflow channels， significantly enhancing the internal quality and service reliability.关键词：Automotive Snail Shell;Die Casting;Defect Analysis;Process Optimization2|0|0更新时间：2026-03-24
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Effects of N-substituted Doping on Mechanical Properties of Ti Alloy Based on Molecular Dynamics AI导读
“介绍了其在Ti合金领域的研究进展，专家通过分子动力学方法探索了N取代掺杂对Ti合金力学性能的影响，为Ti合金性能优化提供了新思路。”摘要：Based on molecular dynamics methods， nitrogen （N） randomly substitutes atoms at lattice sites of α-Ti to form intermetallic compounds and interstitial solid solutions through diffusion. The diffusion behavior of N and the influence on mechanical properties of Ti alloy were investigated， which was mainly divided into two stages of diffusion and tensile. In the diffusion stage， the mean square displacement was utilized to calculate diffusion coefficient of N， and the structure evolution of Ti alloy was clarified by radial distribution function combined with common neighbor analysis. Through tensile along specific crystallographic orientations and dislocation analysis， the impact of N-substituted doping on mechanical properties of Ti alloy was determined. The results indicate that N diffusion is dominated in the formation of interstitial solid solutions and intermetallic compounds composed of Ti₂N. Due to lattice distortion， metastable BCC-Ti is formed， and dislocation sources are generated at grain boundaries in lattice-distorted regions， which continuously expand during the tensile process. When N content reaches over 0.6%， the crystal structure of Ti alloy after diffusion is completely destroyed. After N substitutional doping， the tensile strength and plasticity exhibit a declining trend， where the slip mechanisms is dominated by <a> slip and <c+a> slip. The structure evolution after N doping significantly affects dislocation glide and mechanical properties of Ti alloy.关键词：Molecular Dynamics;Ti Alloy;Mechanical Performance;Substitutional Doping2|0|0更新时间：2026-03-24
Research·Computer Application
- “在航空航天等高端装备领域，专家研究了1 550 ℃过热条件下熔体处理时间对K424合金组织与力学性能的影响，为解决凝固偏析等问题提供解决方案。”摘要：Aiming at the urgent demand of high performance superalloy castings for the high-end equipment in the aerospace， national defense and other fields， as well as solidification segregation problems caused by high alloying， the effect of different melt treatment durations on the microstructure and mechanical properties of K424 superalloys under superheat condition of 1 550 ℃ was investigated by optical microscope， scanning electron microscope and electronic universal testing machine. The results indicate that the average grain size and secondary dendrite spacing are gradually decreased with the increase of melt treatment duration with reduction of element segregation degree， and the morphology and distribution of （γ+γ′） eutectic and carbides are improved. With melt treatment duration of 15 min， the comprehensive mechanical properties of specimen are desirable， where the tensile strength at room temperature and elevated temperature reaches 1 060 MPa and 1 019 MPa， which is increased by 21.1% and 13.3% of that before melt treatment， respectively.关键词：K424 Superalloy;Melt Treatment Duration;Solidification Structure;Mechanical Properties2|0|0更新时间：2026-03-24
- “针对重型燃气轮机透平叶片生产中的荧光异常问题，专家通过生产流程追溯，定位冷却液交叉污染成因，实施冷却液更换、系统清洁及工艺调整等改进措施，有效解决叶片磨削缺陷，提升表面质量与尺寸精度。”摘要：Defects such as vibration marks， grinding burns and linear cracks often occur in turbine blades for heavy-duty gas turbines due to the complex blade profiles and extremely high requirements for dimensional accuracy and surface integrity. In view of large area of fluorescent dense dot-like indication anomalies that appear during the production of a certain type of heavy-duty gas turbine turbine rotor blade， the micro characteristics and causes were revealed. Through a process traceability of entire production process， the problem of cross-contamination of coolant was identified. Targeted improvement measures including complete coolant replacement and system cleaning， adding heat treatment isolation gaskets， and adjusting the process plan and parameters were proposed and implemented. The batch of workpieces after improvement is free of dense dot-like indication， which passes the thermal shock fluorescent inspection， and the grinding surface quality and dimensional accuracy meet the technical specifications.关键词：Heavy Duty Gas Turbine;Turbine Blades;Tenon Teeth Grinding;Process Improvement2|0|0更新时间：2026-03-24
- “介绍了其在铝合金薄板坯制备领域的研究进展，专家采用立弯式连铸技术制备5182铝合金薄板坯，经热处理、热轧和冷轧制备板材。对比分析有、无均匀化热处理的铸坯、热轧和冷轧板材微观组织及性能差异，探究影响板材性能差异的因素。结果表明，经立弯式连铸技术制得薄板坯晶粒均为细小的等轴晶，均匀化热处理有效消除了非平衡凝固产生的枝晶偏析，使部分处于亚稳态的Al6（Fe，Mn）相发生转变，析出α-Al（Fe，Mn）Si相，并降低轧制织构强度。经均匀化处理的板材伸长率和成形性能略有提高，但抗拉强度由382~396 MPa下降到368~374 MPa。”摘要：5182 aluminum alloy sheet billets were fabricated by vertical bending continuous casting technology， and heat treatment， hot rolling， and cold rolling were conducted to prepare plate. The microstructure and performance differences of ingots， hot-rolled and cold-rolled plates before and after homogenization heat treatment were comparatively analyzed using optical microscopy （OM）， scanning electron microscopy （SEM）， electron probe microanalysis （EPMA）， X-ray diffraction （XRD）， and other analytical methods， and the influence factor was investigated. The results reveal that sheet billets fabricated by vertical bending continuous casting are composed of fine equiaxed grains. Homogenization heat treatment effectively eliminates dendrite segregation caused by non-equilibrium solidification， leading to the transformmation of metastable Al6（Fe，Mn） phases to α-Al（Fe，Mn）Si precipitates， thus reducing strength of rolling texture. The elongation and formability of plates after homogenization treatment are slightly enhanced， whileh tensile strength is decreased from 382~396 MPa to 368~374 MPa.关键词：Vertical Bending Continuous Casting;Homogenization Heat Treatment;AA5182;Sheet Billets;Microstructure and Properties2|0|0更新时间：2026-03-24
- “专家建立高斯热源模型，模拟并验证1 mm厚6016铝合金薄板激光焊接温度场，研究工艺参数对焊缝成形质量与力学性能的影响，为激光焊接技术优化提供参考。”摘要：Gaussian heat source model was established to simulate laser welding temperature field of 6016 aluminum alloy plate with thickness of 1 mm， and the reliability was verified by temperature measurement. Under laser power of 1 kW，6016 aluminum alloy sheet was welded with different travel speeds，and metallographic observation，hardness and tensile tests were carried out to investigate the influence of laser welding temperature field on mechanical properties.The results indicate that grains in the weld area are distinctly refined， while the strengthening phase disappear， leading to the decline in hardness and strength. With constant laser power，reduction of welding speed results in the augment of peak temperature as well as the diminution of cooling rate. Adjusting the process parameters of laser welding can alter the temperature field，which directly affects the forming quality and mechanical properties of the welding joint.关键词：Laser Welding;6016 Aluminum Alloy Sheet;Temperature Field Simulation;Mechanical Properties0|0|0更新时间：2026-03-24
Research·Alloy Process
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Effects of Cr Content and Heat Treatment on Microstructure and Properties of Al-Si-Mg-Cu Alloys AI导读
“介绍了其在Al-Si-Mg-Cu合金领域的研究进展，专家通过添加不同含量Cr并结合两种固溶处理工艺及T6时效处理，探索了Cr对合金组织和性能的影响，为优化合金性能提供了新思路。”摘要：The effect of Cr content and heat treatment processes on microstructure and properties of cast Al-Si-Mg-Cu alloys were investigated. Through various Cr additions combined with solution heat treatment processes （SST1 and SST2） and aging treatment （T6）， the influence of Cr on microstructure and properties of alloy was analyzed. The results indicate that Cr addition can effectively regulate the morphology of Fe-rich phases， which inhibits the formation of β-Al5FeSi and promotes the formation of Al（Cr，Fe）Si dispersoids. As Cr content rises， the hardness is significantly improved， of which the increment reaches the maximum particularly under SST2 treatment. Furthermore， Cr addition enhances the tensile strength and yield strength after solution treatment， which reduces plasticity， where the elongation is significantly decreased with Cr content exceeding 0.15%. TEM analysis reveals that Cr enhances the strengthening effect of alloy by promoting the precipitation of dispersoids. However， the hardness difference between as-aged and as-solubilized alloys is declcined after aging treatment， indicating the weakened strengthening effect of dispersoids during aging stage. Overall， Cr has a significant impact on properties of cast Al-Si-Mg-Cu alloys， while the strengthening effect is partially retained during aging， which requires further optimization of processing techniques.关键词：Al-Si-Mg-Cu Casting Alloy;Cr;Heat Treatment;Fe-rich Phases;Dispersoids2|0|0更新时间：2026-03-24 - 摘要：In order to meet the industrial demand for high-strength Al-Si alloys， thermodynamic calculation software was employed to analyze the effect of varying Si content on solidification characteristics of alloys， and suitable range of Si content was determined.Additionally，the effects of different Cu and Mg contents on solidus temperature and precipitation temperature of Q-Al5Cu2Mg8Si6 phase were investigated to ascertain the appropriate Cu and Mg content ranges. The composition of Al-Si-Cu-Mg alloy was further optimized through orthogonal experiments， which is finally confirmed as Al-9Si-0.7Mg-1.5Cu.After modification and refinement treatment， the tensile strength， yield strength， hardness and elongation of as-cast alloy are 243.7 MPa， 145.2 MPa， 75.8 HV， and 3.8%， respectively. After T6 heat treatment， the mechanical properties are significantly improved， with tensile strength of 382.5 MPa， yield strength of 265.8 MPa. The hardness is escalated to 137.5 HV， and elongation is enhanced to 5.6%.关键词：Thermodynamic Calculation;Al-Si-Cu-Mg Alloy;Modification and Refinement;Mechanical Property2|0|0更新时间：2026-03-24
- “介绍了其在高温合金抗氧化性能领域的研究进展，专家采用增重法研究了Mo元素对Ni-25Cr-10Fe-3Si-xMo合金在1 000 ℃下的高温氧化行为的影响，并利用扫描电镜、拉曼光谱仪、X射线光电子能谱等手段对氧化产物进行了表征，为合金抗氧化性能研究提供了新方向。”摘要：The effects of Mo on high-temperature oxidation behavior of Ni-25Cr-10Fe-3Si-xMo alloys at 1 000 ℃ were investigated by weight gain method. The oxidation products were characterized by scanning electron microscopy （SEM）， Raman spectroscopy， and X-ray photoelectron spectroscopy （XPS）. The results indicate that Mo addition significantly deteriorates the oxidation resistance of alloy. As Mo content rises from 0 to 3%， the parabolic rate constant of oxide weight gain is increased from 6.8 × 10-3 mg2/（cm4·h） to 1.3 × 10-2 mg2/（cm4·h）， which is attributed to the formation of volatile MoO3， reducing the density of oxide film and promoting the growth of spinel-type oxides， thereby accelerating oxidation rate. Additionally， Mo is benefit to the formation of a continuous SiO2 layer at the interface between oxide and alloy through the third-element effect， which compromises the adhesion of oxide film.关键词：Ni-Cr-Fe-Si Alloy;High Temperature Oxidation;Mo;Oxidation Film2|0|0更新时间：2026-03-24
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Effects of Sn Content on Microstructure and Tribological Properties of Cu
⁃x Sn-4Bi-2Ni-1Fe Alloys AI导读“介绍了其在合金材料领域的研究进展，专家通过常规铸造方法制备了Cu-xSn-4Bi-2Ni-1Fe合金并进行摩擦磨损试验，使用CALPHAD方法计算合金的伪二元相图以分析凝固过程，为改善合金自润滑性能提供解决方案。”摘要：Cu-xSn-4Bi-2Ni-1Fe （x=6， 8， 10， 12，mass fraction，%） alloys were prepared by conventional casting method， and pin-disc friction and wear tests were carried out. The effect of Sn on microstructure and friction properties of Cu-xSn-4Bi-2Ni-1Fe alloy was investigated. The pseudo-binary phase diagram of the alloy was calculated through CALPHAD method to analyze the solidification process. The results indicate that the increase of Sn content can promote the precipitation of Sn-rich δ phase， leading to the dispersive distribution of Bi， enhancing the self-lubricity of Cu-xSn-4Bi-2Ni-1Fe alloy. Moreover， the increase of Sn content also reduces the surface roughness of friction specimen and diminish the generation of friction noise， while excessive Sn leads to the increase of surface roughness and friction noise.关键词：Sn;Bi Bronze;Tribological Properties;Microstructure;Noise2|0|0更新时间：2026-03-24
Research·Alloy Performance
- “助力超低速压铸技术在电机支架制造中的应用，专家深入分析了电机支架的结构特点和技术要求，验证了超低速压铸技术的适用性，为该领域发展提供了有力支持。”摘要：In order to facilitate the application of ultra-low speed die-casting technology in the manufacture of motor bracket， the concept， principle and advantage of ultra-low speed die-casting technology were described. The application background and purpose in the field of motor bracket manufacturing were investigated. Meanwhile，the structural characteristics and technical requirements of motor bracket were analyzed deeply，and the applicability of ultra-low speed die-casting technology in motor bracket was expounded.Experiments were conducted to verify advantages of ultra-low speed die-casting technology in the manufacture of motor bracket，and the existing problems as well as improvement measures were pointed out.关键词：Ultra-low Speed Die-casting;Motor Bracket;Application3|0|0更新时间：2026-03-24
Application·Die Casting
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