摘要
对热变形前后火力发电站用SAVE12耐热钢的显微组织和析出相进行了研究。结果表明,热变形前后SAVE12耐热钢的显微组织主要由原奥氏体晶粒和板条马氏体组成。热变形前SAVE12耐热钢的析出相主要有3种:富Nb的MX相、富Cr的M23C相和富Fe的M5C2相。热变形后SAVE12耐热钢中MX相发生溶解,生成了MXⅠ相、MXⅡ相和MXⅢ相。同时δ-铁素体中产生了新的块状析出相(Fe,Cr)2Wo。
The microstructure and precipitates of the heat-resistant steel SAVE12 used in thermal power station before and after hot deformation were investigated. The results show that the microstructure of the heat-resistant steel SAVE12 are mainly original austenite grain and lath martensite both before and after hot deformation. There are primary three precipitates before hot deformation： Nb-rich MX, Cr-rich M23 C and Fe-rich M5C2. The MX phase in the heat-resistant steel SAVE12 dissolves after hot deformation, and the phases of MX Ⅰ, MXⅡ and MXⅢ are formed. Simultaneously, a new massive precipitates（Fe, Cr）2Wo appears in δ-ferrite.
出处
《铸造技术》
CAS
北大核心
2014年第11期2492-2494,共3页
Foundry Technology
关键词
热变形
火力发电站
微观组织
hot deformation
thermal power stations
microstructure
