热处理对00Cr22Ni5Mo3N双相不锈钢铸坯组织的影响  

Effect of Heat Treatment on Microstructure of Casting Blank of 00Cr22Ni5Mo3N Duplex Stainless Steel

作　　者：申鹏 杨振 颜海涛[1,2] 杨志春 

机构地区：[1]振石集团东方特钢股份有限公司,浙江嘉兴314005 [2]浙江大学,浙江杭州310058

出　　处：《热加工工艺》2014年第4期169-172,共4页Hot Working Technology

基　　金：浙江省新产品试制计划项目(2010D60SA480045)

摘　　要：研究了固溶处理对00Cr22Ni5M03N双相不锈钢铸坯显微组织、铁素体含量转变及相成分的变化规律的影响。研究表明：800-950℃保温时，组织主要以叮相和奥氏体相（12）转变为主；950-1300℃保温时，主要以铁索体组织转变为主，铁索体含量随着温度的升高而增加；不同的保温段，铁素体转变也不尽相同，其中950～1150℃保温时．铁素体转变量较少，而在1150～1300℃保温时，铁素体转变较为迅速；通过化学试剂腐蚀1150～1300℃保温试样，铁素体组织内发现大量的微裂纹，主要是由于试样的残余热应力造成的；通过电子探针（EMA）对盯相检测表明，盯相主要富集Mo、Cr元素；扫描电镜（SEM）对试样检测表明，铁素体和奥氏体相成分有所不同，铁素体主要富集Cr、Mo等元素，而奥氏体主要富集Ni、Mn等元素，随着温度的升高，化学成分也有变化。The effects of solution treatment process on the microstructure, ferrite content, phase composition of 00Cr 22Ni5Mo3N duplex stainless steel casting blank were studied. The results show that： in the range of 800 ℃ -950 ℃, cr phase and austenite phase （γ/2） transition are main; in the range of 950 ℃-1300 ℃, ferrite phase transition is main; 950℃- 1150 ℃ ferrite phase transition is less, while 1150 ℃-1300 ℃ ferrite transformation is relatively quick. In the range of 1150 ℃- 1300 ℃, the samples after etching by chemical reagents, a large number of micro-cracks in the ferrite phase are found. Through electron microprobe （EMA） tested of sigma phase, the sigma phase is mainly enriched by Mo and Cr element; ferrite and austenite phase component is different, Cr and Mo elements are mainly enriched in ferrite phase, while Ni and Mn elements are mainly enriched in austenite phase. With the temperature increasing, the chemical composition is also changed.

关 键 词：双相不锈钢 热处理 铁素体含量 相成分 Σ相 

分 类 号：TG156.92[金属学及工艺—热处理]