摘要
Fe—23Mn合金和Fe—28Mn一4Si合金的马氏体相变在热循环中的行为截然相反,Fe—23Mn合金奥氏体经热循环后产生稳定化,随着热循环次数增加,ε马氏体数量减少直至消失,得到单相奥氏体组织.但热循环稳定化的奥氏体在室温时效过程中发生等温γ→ε相变.Fe—28Mn一4Si合金奥氏体经热循环后不产生稳定化,ε马氏体数量不是减少,而是明显增多.Fe—28Mn一4Si合金γ→ε相变具有组织遗传特征,而Fe—23Mn合金没有组织遗传特征.
The effecd of thermal cycling on γ→εmartensitic transformation in Fe-28Mn -4Si alloy and inFe-23Mn alloy is different.The austenite of Fe-23Mn alloy is stabilized aha Cyclic transfomation against the subsequent γ→ε martensitic transformation and the structure become fully austenite atroom tempeature after 5 thermal cycles.The austerity stabilzed by thermal cycling transfers isothermallyinto εmertensite when it is tempered at room temperature. However,the austenite of Fe-28Mn-4Sialloy is not stabilized and the γ→εmartensitic transformtion is enhanced by thermal cycling.The microstructure reco very is observed in Fe-28Mn-4Si alloy,but it is not observed in Fe-23Mn alloy.
出处
《大连铁道学院学报》
1996年第1期60-64,共5页
Journal of Dalian Railway Institute
基金
国家自然科学基金
关键词
循环热处理
稳定化
组织遗传
马氏体合金
相变
martensitic transformtion/thermal cycling
thermal stabilization
microstructure recovery