汽车用Mg-6Zn-0.55Zr合金的轧制工艺研究  

Study on Rolling Process of Mg-6Zn-0.55Zr Alloy for Automobile

作　　者：张宏阁 张松泓[2] ZHANG Hongge;ZHANG Songhong(School of Mechanical and Electrical Engineering,Wuhan University of Technology,Wuhan 430000,China;College of Automotive Engineering,Henan Polytechnic Institute,Nanyang 473000,China)

机构地区：[1]武汉理工大学机电工程学院,湖北武汉430000 [2]河南工业职业技术学院汽车工程学院,河南南阳473000

出　　处：《热加工工艺》2021年第13期99-101,共3页Hot Working Technology

基　　金：河南省高等学校青年骨干教师培养计划项目(2016GGJS-237)。

摘　　要：对挤压态Mg-6Zn-0.55Zr合金进行了轧制试验,并采用光学显微镜、万能试验机研究了轧制及轧制后退火对挤压态Mg-6Zn-0.55Zr合金显微组织与力学性能的影响。结果表明:挤压态合金经轧制温度320℃,道次压下率为60%、30%、10%的3道次轧制,板材边缘无裂纹产生,表面质量良好。轧制态合金的晶粒内有大量孪晶与位错,经240℃×1 h退火后,合金完全静态再结晶,等轴晶粒较为细小、均匀,合金的抗拉强度和伸长率分别达到316 MPa和29.6%,综合力学性能最佳。The rolling tests of extruded Mg-6 Zn-0.55 Zr alloy were carried out. And the effects of rolling and annealing after rolling on the microstructure and mechanical properties of extruded Mg-6 Zn-0.55 Zr alloy were studied by OM and universal testing machine. The results show that when the extruded alloy is rolled at 320 ℃ for three passes with reduction rate of 60%, 30% and 10%, the edge of the plate is free of cracks and the surface quality is good. There are many twins and dislocations in the grains of rolled alloy. The alloy is completely static recrystallized after annealing at 240℃ ×1 h. The equiaxed grains are fine and uniform. The tensile strength and elongation of the alloy reach 316 MPa and 29.6% respectively,and the comprehensive mechanical properties are the best.

关 键 词：Mg-6Zn-0.55Zr合金 轧制工艺 挤压合金 退火 

分 类 号：TG335[金属学及工艺—金属压力加工]