不同回火工艺下16Cr12Co钢的强韧化机理研究  

Strengthening Mechanisms of 16Cr12Co Steel under Different Tempering Temperatures

作　　者：徐俏娬 

机构地区：[1]南昌大学机电工程学院,江西南昌330000 [2]上饶职业技术学院,江西上饶334109

出　　处：《铸造技术》2014年第10期2279-2281,共3页Foundry Technology

摘　　要：采用扫描电镜、透射电镜、硬度测试、冲击及拉伸测试,对16Cr12Co钢在不同回火温度下的微观结构及力学性能进行研究,揭示其强韧化机理。结果表明:经过回火处理后,钢的抗拉强度和屈服强度都有明显提高,分别达到1910 MPa和1 420 MPa;且随着回火温度的升高,其断面收缩率和伸长率减小,表面硬度增加,冲击功先减小后增加。同时,钢中析出了超细板状马氏体,保证了其具有良好的韧性和较高的强度。The influence of tempering temperatures on the microstructure and mechanical properties of 16Crl2Co steel were analyzed using SEM, TEM, hardness, impact toughness and tensile test. The results show that, after tempering at different temperatures, the tensile strength and yield strength of the 16Crl2Co steel significantly improve to reach 1 910 and 1 420 MPa, respectively; with the increase of the tempering temperatures, the section reduction rate and elongation of the steel decrease, while the surface hardness increase and the ~impact toughness first decreases and then increases. After tempering, some ultra-free plate-like martensites precipitate out in the steel, which strengthens steel with high toughness and strength.

关 键 词：回火温度 力学性能 强化相 强韧化机制 

分 类 号：TG156.5[金属学及工艺—热处理] TG142.1[金属学及工艺—金属学]