不同挤压温度下Mg-3Y-1.5Ce-0.5Zr合金的组织与力学性能  

Microstructure and Mechanical Properties of Mg-3Y-1.5Ce-0.5Zr Alloy at Different Extrusion Temperatures

作　　者：刘鸿智 童景琳[2] LIU Hongzhi;TONG Jinglin(Hebi Institute of Engineering and Technology,Henan Polytechnic University,Hebi 458030,China;School of Mechanical and Power Engineering,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]河南理工大学鹤壁工程技术学院,河南鹤壁458030 [2]河南理工大学机械与动力工程学院,河南焦作454003

出　　处：《热加工工艺》2024年第8期104-106,112,共4页Hot Working Technology

基　　金：河南省科技攻关项目(202102110271)。

摘　　要：对锻态Mg-3Y-1.5Ce-0.5Zr合金进行了不同温度的热挤压试验,通过金相显微镜、拉伸试验、断口形貌观察等手段研究了不同挤压温度(320~380℃)对该合金组织与力学性能的影响。结果表明:Mg-3Y-1.5Ce-0.5Zr合金经过不同温度挤压后,晶粒得到一定程度的细化。随着挤压温度的升高,合金晶粒尺寸先减小后增大,350℃下挤压的合金的晶粒平均尺寸最小,组织均匀性最佳。随着挤压温度的升高,合金的抗拉强度和伸长率均先升高后降低。350℃挤压的Mg-3Y-1.5Ce-0.5Zr合金的抗拉强度和伸长率均达到最大值,分别为276.3 MPa和17.6%。The hot extrusion tests of forged Mg-3Y-1.5Ce-0.5Zr alloy at different temperatures were carried out.The effects of different extrusion temperatures(320-380℃)on the microstructure and mechanical properties of the alloy were investigated by means of metallographic microscope,tensile test and fracture morphology observation.The results show that the grains of Mg-3Y-1.5Ce-0.5Zr alloy are refined to a certain extent after extrusion at different temperatures.With the increase of extrusion temperature,the grain size of the alloy decreases first and then increases.The average grain size of the alloy extruded at 350℃is the smallest and the microstructure uniformity is the best.With the increase of extrusion temperature,the tensile strength and elongation of the alloy increase first and then decrease.The tensile strength and elongation of Mg-3Y-1.5Ce-0.5Zr alloy extruded at 350℃reach the maximum values of 276.3 MPa and 17.6%respectively.

关 键 词：挤压温度 Mg-3Y-1.5Ce-0.5Zr合金 显微组织 力学性能 

分 类 号：TG379[金属学及工艺—金属压力加工]