ZK60＋Y镁合金塑性变形后组织和性能研究  

Study on Microstructure and Properties of ZK60+Y Magnesium Alloy After Plastic Deformation

作　　者：王莹莹[1] 张秀云[1] 白朴存[1] 田春雨 

机构地区：[1]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051 [2]核工业总公司二O二厂,内蒙古包头014000

出　　处：《热加工工艺》2008年第24期11-13,共3页Hot Working Technology

基　　金：内蒙古自治区高等学校科学研究资助项目(NJ05046)

摘　　要：对真空熔炼后的ZK60+Y镁合金在380℃下进行热挤压,随后取部分挤压棒在400℃下轧制成厚3mm的薄板。通过金相分析、室温力学拉伸试验、透射电镜分析研究了经塑性变形的ZK60+Y镁合金显微组织及力学性能。结果表明,薄板的显微组织中有大量的第二相,大部分呈条带状分布在基体上,透射电镜分析表明这些第二相颗粒包括纳米级大小的颗粒;经过轧制的薄板的抗拉强度、屈服强度和伸长率均较挤压后的棒材有所下降,薄板的抗拉强度、屈服强度和伸长率分别为263MPa、235MPa和15%。A melted ZK60＋Y magnesium alloy was extruded at 380℃, then parts of the extruded sticks were rolled into the sheet with 3 mm thickness. The microstructure and mechanical properties of the alloy were studied and analyzed by optical microscopy, X-diffraction, tensile test and transmission electron microscopy （TEM）. The results show that there are lots of precipitates in the microstructure of the rolling sheet, whose size includes nano grade. The yield strength, tensile strength and extensibility of the rolling sheet are all lower than those of the extruded sticks, and the values are 263 MPa, 235 MPa and 15%, respectively.

关 键 词：ZK60+Y镁合金 挤压 轧制 显微组织 性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]