合金元素Mn、Cr、V对中碳弹簧钢回火组织及力学性能的影响  

Influence of Alloying Element Cr,Mn and V on Microstructure and Mechanical Properties of Medium Carbon Spring Steel After Tempering

作　　者：王轩[1] 陈银莉[1] 许黎明[1] 牛刚[1] 

机构地区：[1]北京科技大学冶金工程研究院,北京100083

出　　处：《热加工工艺》2016年第12期183-186,共4页Hot Working Technology

摘　　要：在实验室试制了三种不同合金成分的中碳弹簧钢,进行了900℃淬火和300~550℃的回火,分析了不同合金元素对回火后实验钢硬度以及显微组织的影响。结果表明当回火温度相同时,添加V元素的实验钢硬度均高于不含V元素的实验钢,且析出碳化物更细小,分布更弥散。当回火温度是350~450℃时,高Cr合金化的实验钢较高Mn实验钢有更佳的抗回火软化特性,马氏体板条宽度更细,实验钢硬度更高。当使用组织为回火马氏体组织时,在三组实验钢中,Cr含量高的钢有最佳的综合力学性能。The medium carbon spring steel with three different alloy compositions was developed in the laboratory, and quenching at 900 ℃ and tempering at 300-550 ℃ were carried out. The effects of different alloying elements on the hardness and microstructure of the experimental steel after tempering were analyzed. The results indicate that： when tempering at the same temperature, the hardness of the experimental steel with V element is higher than that of the experimental steel without V element. The precipitated carbide is finer, and the distribution is more dispersed. When tempering temperature is at 350-450 ℃, experimental steel with high Cr alloying has better resistance to tempering softening characteristics than that of high Mn experimental steel, the width of the martensite lath is finer and the Rockwell hardness is higher. When the used microstructure is a tempered martensite, in the three groups of experimental steel, the steel with the high Cr content has the best comprehensive mechanical properties.

关 键 词：中碳弹簧钢 合金元素 回火 力学性能 显微组织 

分 类 号：TG162.85[金属学及工艺—热处理]