回火温度对1Cr13不锈钢组织与力学性能的影响.PDF

下半月出版 Material Heat Treatment 材料热处理技术 回火温度对1Cr13 不锈钢组织与力学性能的影响 杨顺贞, 唐建永, 吕均益, 刘翠英 (河海大学 机电工程学院, 江苏 常州 2 13022) 摘 要 采用不同温度对 1050 ℃油冷淬火后的1Cr 13 不锈钢进行回火处理 然后对试样进行力学性能检测和显微 组织分析遥结果表明院 回火温度的升高马氏体组织不断分解 当温度高于450 ℃时 合金 化物开始沿晶界析出 当温 度达到600 ℃以上时 马氏体组织转变为索氏体组织 合金 化物已呈现弥散分布 并开始长大尧球化曰显微组织的变化 导致其力学性能也出现较大变化 回火温度的升高 其硬度和抗拉强度降低 但其冲击韧度显著提高曰1050 ℃油淬+ (650～750)℃空冷回火时可以获得良好的综合力学性能遥 关键词 1Cr 13曰 回火温度曰显微组织曰力学性能 中图分类号 TG 156.5 文献标识码 A 文章编号 Effect of Tempering Temperature on Microstructure and Mechanical Properties of 1Cr13 Stainless Steel YANG Shunzhen, TANG Jianyong, LV Junyi, LIU Cuiying (College of Mechanical and Electronic Engineering, Hohai University, Changzhou 213022, China) Abstract 院1050 ℃ oil quenching 1Cr 13 stainless steel was tempered under different tempering temperature, then the mechanical properties were tested and the microstructure was analyzed. The results show that the martensite decomposes constantly with the increase of tempering temperature, when the temperature is higher than 450 ℃, alloy carbides startes to separate out along the grain boundaries; when higher than 600 ℃, martensite decomposes and transformes to sorbite, alloy carbides is dispersed and began to grow up with spheroidizing. Change in the microstructure results in the big change of mechanical properties, with the increase of tempering temperature, hardness and tensile strength reduces, and impact toughness improves significantly. Especially the 1050 ℃ oil quenching and 650 ℃～750 ℃ air cold tempering