P92耐热钢物理化学相分析  

Physicochemical phase analysis of heat resistant steel P92

作　　者：李玲霞[1] 刘正东[1] 赵晓丽[1] 李南[1] 王春芳[1] 

机构地区：[1]钢铁研究总院,北京100081

出　　处：《冶金分析》2013年第2期1-7,共7页Metallurgical Analysis

基　　金："973"项目(2010CB600804)

摘　　要：采用物理化学相分析方法研究了P92耐热钢的回火及时效后碳化物和金属间化合物的析出行为,并通过实验确定了P92钢中析出相的萃取和分离方法、钢中析出相的类型、含量及组成结构式等。研究结果表明,回火态试样中含有M23C6与M(CN)两种析出相,时效100h后,X-ray分析结果出现Laves相。随着时效时间的增加,Laves相也明显增加,且W、Mo含量高的试样在时效后Laves相析出量增加较多,M23C6的析出量增加较少,M(CN)析出相含量变化不大。P92钢在短时间内析出的Laves相有显著的强化效果,在1 000h内增加Laves相析出量能有效提高P92钢室温及600℃下强度。The precipitation behaviors of carbide and intermetallic compounds in heat resistant steel P92 after tempering and aging were studied by physicochemical phase analysis method. The extraction and separation method of precipitation phase in steel P92, as well as the type, content and composition formula of precipitation phase in steel were obtained by experiments. The results showed that, the tempering-state sample contained two precipitation phases including M23C6 and M（CN）. After aging for 100 h, Laves phase was observed in X-ray analysis. With the prolonging of aging time, the Laves phase increased significantly. In addition, for samples with high W and Mo content, the increment of Laves precipitation phase was more, while the increment M23C6 precipitation phase was less, and the content of M（CN） in precipitation phase was basically changeless. The Precipitated Laves phase of steel P92 in short time showed significant strengthening effect. The increase of Laves precipitation phase within 1 000 h could effectively improve the strength of steel P92 at room temperature and 600℃.

关 键 词：P92耐热钢 回火 时效 物理化学相分析 

分 类 号：TG142.73[一般工业技术—材料科学与工程]