【摘要】 采用半连续铸造和热挤压法制备了6061铝合金电池托盘型材，采用JMatPro计算了6061铝合金的平衡相组成，结合光学显微镜、扫描电镜、能谱分析、拉伸试验及腐蚀试验，分析了合金化学成分和热处理工艺对铝合金型材力学性能与耐蚀性的影响。结果表明，6061合金组织中的粗大第二相聚集对塑性有不利影响，利用JMatPro计算分析发现合金成分中高Fe低Mn,会形成微米级β-AlFeSi相，也对合金塑性有不利影响。6061铝合金采用570℃×12 h的均匀化处理能改善难溶第二相尺寸及分布，由其拉伸试验及抗剥落腐蚀、晶间腐蚀、中性盐雾腐蚀和抗应力腐蚀性能测试结果可知，经均匀化处理的6061合金的力学性能和耐蚀性可达到客户要求。更多还原

【Abstract】 6061 aluminum alloy profiles for battery pallet in new energy vehicles were prepared by semi-continuous casting and hot extrusion. The equilibrium phase composition of the 6061 aluminum alloy were calculated by JMatPro. Effect of chemical composition and heat treat process on the mechanical properties and corrosion resistance of aluminum alloy profiles were analyzed by means of OM, SEM, EDS, tensile test and corrosion test. The results show that the coarse second phase aggregation in the microstructure of the alloy has an bad effect on plasticity. Using JMatPro calculation analysis, it is found that in the alloy with high Fe and low Mn, the micro scale β-AlFeSi phases are formed, which also has an bad effect on the plasticity of the alloy. The homogenizing of 570 ℃×12 h can improve the size and distribution of the insoluble second phases in the alloy. According to the tensile properties and test results of its resistance to spitting corrosion, intergranular corrosion, neutral salt spray corrosion and stress corrosion, the mechanical properties and corrosion resistance of the homogenized alloy can meet customer requirements.更多还原