挤压工艺参数对汽车用新型Al-Mg-Si-In-Cr合金管材组织及性能的影响  

Effect of extrusion parameters on microstructure and properties of new aluminum alloy tube for automobile

作　　者：潘天堂[1] 平建 PAN Tian-tang;PING Jian(Changzhou Vocational Institute of Mechatronic Technology,Changzhou 213164,China;College of Mechanical and Electrical engineering.Shandong Yingcai University,Jinan 250104,China)

机构地区：[1]常州机电职业技术学院,江苏常州213164 [2]山东英才学院机械与电气工程学院,山东济南250104

出　　处：《轻合金加工技术》2020年第12期38-42,共5页Light Alloy Fabrication Technology

基　　金：国家自然科学基金项目(50175083);山东省企业培训与职工教育重点课题(2018-263)。

摘　　要：采用不同的挤压速度和挤压温度挤压汽车用新型Al-Mg-Si-In-Cr合金管材,并对其显微组织和力学性能进行测试与分析。结果表明:当挤压比23.8和模具预热温度280℃均不变时,随挤压速度的增加、挤压温度的升高,合金的晶粒先细化后粗化,抗拉强度、屈服强度先增大后减小。当挤压温度500℃、挤压比23.8、模具预热温度280℃均保持恒定时,与1 m/min挤压速度相比,3 m/min挤压速度挤压的合金试样的抗拉强度、屈服强度增幅分别为8.37%,15.7%,当挤压速度3m/min、挤压比23.8和模具预热温度280℃均保持恒定时,与460℃挤压温度相比,500℃挤压温度挤压的合金试样的抗拉强度、屈服强度增幅分别为11.93%14.67%.Al-Mg-Si-In-Cr aluminum alloy tube were extruded at different extrusion speeds and temperatures,and their microstructure and mechanical properties were tested and analyzed.The results show that when the extrusion ratio of 23.8 and the preheating temperature of the die of 280 ℃ remain unchanged,with the increase of extrusion speed and extrusion temperature,the grain of the alloy is first refined and then coarsening,the tensile strength and yield strength are first increased and then decreased.When extrusion temperature,extrusion ratio and preheating temperature of the mold were kept constant at 500 ℃, 23.8 and 280 ℃,respectively,the tensile strength and yield strength of the alloy samples at extrusion speed of 3 m/min were increased by 8.37% and 15.7% respectively,compared with those at extrusion speed of 1 m/min.When extrusion speed,extrusion ratio and the preheating temperature of the mold were kept constant at 3 m/min,23.8 and 280 ℃ respectively,the tensile strength and yield strength of the alloy samples extruded at 500 ℃ increased by 11.93% and 14.67% respectively,compared with those at the extrusion temperature of 460 ℃.

关 键 词：汽车用铝合金管材 Al-Mg-Si-In-Cr合金 挤压 显微组织 力学性能 

分 类 号：TG[金属学及工艺]