高温离子渗碳后循环处理对晶粒度及性能的影响  

Effects of Cyclic Heat Treatment after High Temperatur Ion Carburizing on Austenite Grain Number and Mechanical Properties

作　　者：胡德林[1] 张帆[1] 郦定强 陈彦[1] 

机构地区：[1]西北工业大学,710072

出　　处：《金属热处理》1994年第2期3-7,共5页Heat Treatment of Metals

基　　金：机电部科学基金

摘　　要：详细研究了20Cr2Ni4A、20CrNi2Mo及20CrMnTi三种钢高温离子渗碳后循环热处理对晶粒大小及力学性能的影响。研究结果表明，循环处理能有效地细化高温离子渗碳的粗大晶粒，循环2～3次后可使心部晶粒细化至ASTM10级以上，并显著提高材料的韧性及疲劳极限，接触疲劳强度也略有提高。In this paper,the effects of cyclic heat treatment on austenite grain number and mechanical properties after high temperature ion carburizing have been carefully researched for steels 20Cr2Ni4A, 20CrNi2Mo and 20CrMnTi. The results show that the coarse grains produced in high temperature ion carburizing can be refined effectively after 2～3 times cyclic heating, so that the coarse grain number can reach to ASTM 10 or more,the impact toughness and fatigue strength can be increased significantly,and the contact fatigue strength is also increased slightly.

关 键 词：离子渗碳 循环热处理 晶粒度 

分 类 号：TG156.81[金属学及工艺—热处理]