热处理工艺对α?邛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?邛γ Reverse Transformation
肖红亮, 赵英利, 时 捷, 雍岐龙
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作者单位：钢铁研究总院 结构材料研究所, 北京 100081
中文关键字：晶粒细化； 再结晶； 再加热； 逆相变
英文关键字：grain refinement; recrystallization; reheating; reverse transformation
中文摘要：利用Gleeble-1500热模拟试验机，采用α?邛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。
英文摘要：The effects of heat treatment process on grain refinement of austenite through α?邛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.