A356铝合金轮毂低压铸造数值模拟以及组织与力学性能  

Numerical simulation,microstructure and mechanical properties of low pressure die casting of A356 aluminum alloy wheel hub

作　　者：张东生 李世德[1,2] 徐佐 王佶 毕江 董国疆[1,4] ZHANG Dong-sheng;LI Shi-de;XU Zuo;WANG Ji;BI Jiang;DONG Guo-jiang(Hebei Key Laboratory of Special Delivery Equipment,Yanshan University,Qinhuangdao 066004,China;CITIC Dicastal Co.,Ltd.,Qinhuangdao 066011,China;State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China;Key Laboratory of Advanced Forging and Stamping Technology and Science,Ministry of Education,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]燕山大学河北省特种运载装备重点实验室,秦皇岛066004 [2]中信戴卡股份有限公司,秦皇岛066011 [3]燕山大学材料科学与工程学院,秦皇岛066004 [4]燕山大学先进锻压成形技术与科学教育部重点实验室,秦皇岛066004

出　　处：《中国有色金属学报》2023年第6期1720-1731,共12页The Chinese Journal of Nonferrous Metals

基　　金：河北省自然科学基金资助项目(E2021203138)。

摘　　要：采用轻质铝合金构件是实现汽车轻量化的重要策略,轮毂作为典型车用铝合金零件,其成形质量与低压铸造工艺参数密切相关。本文采用ProCAST有限元软件对A356铝合金轮毂低压铸造过程进行模拟仿真,研究了浇注温度及保压时间对轮毂成形质量的影响。并利用优化参数对轮毂进行铸造,对其成形质量及组织性能进行分析;同时,对轮毂不同部位进行微观组织及力学性能分析;对轮辋部位进行拉伸性能测试。结果表明:在浇注温度为700℃、保压时间为80 s时,铝液充型平稳,凝固符合顺序凝固原则,其铸造缺陷产生的概率最低;轮毂由内至外晶粒尺寸逐渐减小,由轮毂中心部位的58μm减小至外轮缘的23μm;轮辋部位抗拉强度可达228 MPa,屈服强度为170 MPa,断后伸长率为6%。The lightweight aluminum alloy component is an important strategy to realize automobile lightweight.As typical aluminum alloy parts for vehicles,the forming of wheel hub is closely related to die casting process parameters.In this paper,ProCAST finite element software was used to simulate the low pressure die casting process of A356 aluminum alloy wheel hub,and the effects of pouring temperature and holding time on the forming quality of wheel hub were studied.The trial production of wheel hub produced with optimized parameters,and the forming quality and microstructure were analyzed.The microstructure and mechanical properties of different parts of wheel hub were analyzed.The tensile properties of the rim were tested.The results show that,when the pouring temperature is 700℃and holding time is 80 s,filling of aluminum liquid is stable,the solidification conforms to the principle of sequential solidification,and the probability of casting defects is the lowest.The grain size of wheel hub decreases gradually from inside to outside,from 58μm in the center hub to 23μm in the outer rim.The tensile strength of the rim is 228 MPa,the yield strength is 170 MPa,and the elongation after fracture is 6%.

关 键 词：A356铝合金 低压铸造 数值模拟 微观组织 力学性能 

分 类 号：TF11.31[冶金工程—冶金物理化学]