【摘要】 对不同热处理状态下的微观组织结构进行了研究。采用物理化学相分析技术研究了9Cr13Mo3Co3Nb2V退火、淬火以及最终热处理制度下析出相的类型、含量及组成结构式。并用X射线小角散射(SAXS)(sm all angle x-ray scatter)分析了不同热处理制度下析出相在不同粒度间隔中的质量分布。结果表明:①9Cr13Mo3Co3Nb2V钢退火状态的组织为珠光体+碳化物(M23C6,MC和M6C),淬火状态组织为马氏体+碳化物(M23C6和MC),最终热处理状态的组织为回火马氏体+碳化物(M23C6,MC和M3C);②小颗粒(≤300nm)碳化物析出相粒度分析表明,9Cr13Mo3Co3Nb2V钢退火、淬火状态析出相平均粒度相差不大,粗大颗粒较多,而最终热处理状态的析出相平均粒度明显减小,且细小颗粒比例较大。更多还原

【Abstract】 9Cr13Mo3Co3Nb2V steel belongs to dispersion-hardening martensitic stainless steel with high hardness,which can gain high hardness(≥59HRC) and high anti-wearing through heat treatment.In the paper the microstructure of 9Cr13Mo3Co3Nb2V in different heat-treatment has been studied.The type,content and structural composition of separated phase in different heat-treatment(tempered,quenched and standardize heat-treated) have been investigated using physic-chemical analytic technology,the weight distribution of separated phase in different grain-size of different heat-treated 9Cr13Mo3Co3Nb2V has been analyzed using SAXS.更多还原