摘要
使用高真空电弧熔炼炉熔炼了不同Si含量的30Cr13不锈钢试样。经扩散退火、淬火加低温回火后,进行硬度与拉伸性能测试,采用光学显微镜(OM)、扫描电子显微镜(SEM)、能谱仪(EDS)和X射线衍射(XRD)等手段分析了30Cr13不锈钢显微组织和碳化物形貌及相组成。结果表明,在相同热处理条件下,随着Si含量的增加,显微组织逐渐由马氏体转变为铁素体;抗拉强度和硬度先增加后减小,在Si含量为1.00%时达到最高值;伸长率先增加再变小,在Si为1.5%时塑性最好;试样中碳化物质量分数随Si增加而递增,析出相主要为M_(23)C_6型(Cr_(15.58)Fe_(7.42)C_6)碳化物,同时伴有少量Cr7C3型碳化物。
30Cr13 stainless steel sample with different Si content was smelted by high vacuum are smelting. The mierostructure, carbide morphology and phase composition of 30Cr13 steel was analyzed by means of OM, SEM, EDS and XRD after diffusion annealing, quenching and low temperature tempering. The results show that under the condition of the same heat treatment process, microstrueture has transformed from martensitic to ferrite with the increase of Si content, tensile strength and hardness increase first and reach the maximum when Si content is 1.00% , and then decrease, as well as elongation increases first and then decreases, the plastic is best when Si content is 1.5% ; Carbide mass fraction of the sample increases with the increase of Si content, precipitated phase are mainly M23 C6 （Cr15,58 Fe7.42C6 ） carbide and a small amount of Cr7 C3 carbide.
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第5期72-77,共6页
Heat Treatment of Metals
