冷变形对12Cr铁素体/马氏体钢回复与再结晶过程的影响  

The Influence of Cold Deformation to 12Cr Ferritic/Martensitic Steel Recovery and Recrystallization Process

作　　者：肖翔[1] 刘国权[1,2] 胡本芙[1] 胡加学[1] 康人木[1] 郑晓[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]新金属材料国家重点实验室,北京100083

出　　处：《材料工程》2011年第2期73-78,共6页Journal of Materials Engineering

基　　金：国家"973计划"资助项目(2007CB209801)

摘　　要：研究了一种新型高Cr低活性铁素体/马氏体(F/M)钢用作超临界水堆燃料包壳管用候选材料,研究冷变形对其铁素体和板条马氏体双相组织的回复、再结晶过程的影响。结果表明,不同冷变形量对板条马氏体再结晶的促进程度不同,10%冷变形后780℃高温退火只发生回复,回火马氏体板条发生合并与迁移;60%冷变形后780℃高温退火,回火马氏体发生快速回复和再结晶。相同冷变形量下,高温退火时回火马氏体会优先于铁素体发生再结晶。12%δ铁素体的存在并不会明显延缓回火马氏体的再结晶过程,长时退火后,少量的铁素体晶粒都会转变成二次再结晶铁素体晶粒,最终组织为细晶铁素体。A new high Cr low activation ferritic/martensitic（F/M） steel used for candidate cladding tube in supercritical water reactor has developed,research for the influence of cold deformation to its ferrite and lath martensite in the recovery and recrystallization process.The results showed that cold deformation can promote the recrystallization of lath martensite in different degrees,annealing at 780℃ after 10% cold deformation occurs only recovery process,martensite lath is merged with transfer,however,annealing at 780℃ after 60% cold deformation,tempered martensite occurs rapid recovery and recrystallization.After the same amount of cold deformation,tempered martensite recrystallization will give priority to the ferrite in high temperature tempering process.12% δ-ferrite will not significantly delay the re-crystallization process of martensite,after long tempering,the ferrite grains are converted into secondary recrystallized ferrite grains.The final microstructure is fine grain ferrite.

关 键 词：低活性 铁素体/马氏体钢 冷变形 回复与再结晶 

分 类 号：TL341[核科学技术—核技术及应用] TG111.3[金属学及工艺—物理冶金]