热处理工艺对α→γ逆相变再结晶晶粒细化的影响  

Effect of Heat Treatment Process on Grain Refinement Through Recrystallization with α→γ Reverse Transformation

作　　者：肖红亮[1] 赵英利[1] 时捷[1] 雍岐龙[1] 

机构地区：[1]钢铁研究总院结构材料研究所,北京100081

出　　处：《热加工工艺》2010年第18期180-182,共3页Hot Working Technology

摘　　要：利用Gleeble-1500热模拟试验机,采用α→γ逆相变细化奥氏体晶粒的方法,研究了热处理工艺对晶粒细化的影响机制。结果表明:对于非平衡态组织马氏体,在其再加热过程中,原奥氏体晶粒发生了逆相变再结晶,得到了等轴细化的奥氏体晶粒;随回火时间的延长,再加热淬火后的原奥氏体晶粒逐渐粗化;随再加热温度的升高和保温时间的延长,晶粒细化效果减弱。The effects of heat treatment process on grain refinement of austenite through α→γ reverse transformation were studied using Gleeble-1500 machine.The results show that the austenitic grains are formed due to the recrystallization of austenite during reheating process,and austenite grains coarsen with the increase of holding time;the prior austenite grains decreases with the increase of reheating temperature and holding time.

关 键 词：晶粒细化 再结晶 再加热 逆相变 

分 类 号：TG156.5[金属学及工艺—热处理]