液相线模锻法制备ZK60-RE镁合金半固态组织演变  

Microstructure evolution of magnesium alloy ZK60-RE made by liquidus forging during semi-solid isothermal heat treatment

作　　者：赵祖德[1] 单巍巍[2] 罗守靖[2] 

机构地区：[1]中国兵器工业第五九研究所,重庆400039 [2]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《材料科学与工艺》2007年第1期59-63,共5页Materials Science and Technology

基　　金：国家自然科学基金资助项目(50475029)

摘　　要：给出了液相线模锻法制备ZK60-RE镁合金半固态坯料的实验方法和工艺参数,并研究了该方法制备的ZK60-RE镁合金在半固态等温热处理过程中的微观组织演变.结果表明:利用液相线模锻法可以制备半固态ZK60-RE镁合金坯料,半固态ZK60-RE镁合金坯料在保温时间较短的半固态等温热处理过程中能形成晶粒细小、晶粒粗化速度较为缓慢的球晶组织,晶粒在600℃保温15 min、610℃保温3 min和618℃保温0 min时分别达到最小,最小尺寸分别为35、45、30μm,能够达到半固态加工实际化生产的较高要求.晶粒在不同的温度下随着保温时间的延长,晶粒的圆整度均逐渐变小,球晶化越来越好.Experimental method and parameters of liquidus forging are given in this paper to prepare the bellit for semi-solid process, and microstructure evolution of magnesium alloy ZK60-RE during semi-solid isothermal heat treatment is researched as well. The results show that grains of the billet prepared by liquidus forging can turn to small spheridals in a not very long time, the size of grains could reach respectively 35 μm, 45 μm and 30 μm when the temperatures are 600 ℃ ,610 ℃ and 618 ℃ with holding time of 15 min, 3 min and 0 min. with increase the holding time, the shape factors decreased which means the grains are more and more global.

关 键 词：液相线模锻法 ZK60-RE镁合金 半固态等温热处理 微观组织演变 

分 类 号：TG146.2[一般工业技术—材料科学与工程]