奥氏体晶粒细化的研究  

Refinement Technology of Austenite Grains

作　　者：张红梅[1] 王振敏[1] 李维娟[1] 王国栋[2] 刘相华[2] 

机构地区：[1]鞍山科技大学材料科学与工程学院,辽宁鞍山114002 [2]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004

出　　处：《机械工程材料》2004年第7期4-6,共3页Materials For Mechanical Engineering

基　　金：国家973重大基础研究基金资助项目(G1998061509)

摘　　要：在Gleeble1500热模拟机上以SS400钢为研究对象,用冷加工+回火再结晶和冷加工+α→γ逆相变等工艺,研究了冷变形对马氏体(铁素体)再结晶行为的影响以及奥氏体晶粒细化的方法。结果表明:低温变形对板条马氏体的再结晶行为有一定影响,并且由于低温变形后快速升温的铁素体回复、再结晶与奥氏体(铁素体)相变等相继发生,从而得到比较细小的奥氏体晶粒。The effect of cold working of marstensite and α→γ reverse transformation on the behavior of austenite recrystallization and the ways of the grain refinement of austenite grains were studied on a Gleeble 1500 thermomechanical simulator for low carbon steel SS400 by cold working marstensite + tempering, and recrystallization or + α→γ reverse transformation. It is indicated that the cold working of marstensite has some effect on marstensite recrystallization and there are probably some mutual competition processes, i. e., recovery and recrystallization of ferrite matrix and austensitizing transformation as a result of large deformation at low temperature and then rapid heated. The fine austenite structure can thus be obtained.

关 键 词：奥氏体 逆相变 铁素体 晶粒细化 马氏体 

分 类 号：TG142.1[一般工业技术—材料科学与工程]