摘要
研究了不同淬火温度对齿轮钢C61显微组织和力学性能的影响。结果表明:淬火温度为950℃时,试验钢C61的力学性能达到最佳,其抗拉强度、屈服强度、伸长率以及断面收缩率分别为1162 MPa、1154 MPa、12.1%和50.82%。随着淬火温度的升高,试验钢的强度、硬度逐渐下降,伸长率、断面收缩率先升高后下降;钢中的碳化物也随着淬火温度的升高逐渐溶解,并于950℃时几乎全部溶解;当淬火温度较低时,显微组织中马氏体板条较小,随着温度的升高,马氏体板条尺寸增大、粗化导致C61钢强度、硬度降低;另外,试验钢的断裂行为由韧性断裂逐渐转变为准解理断裂。
Effects of different quenching temperatures on microstructure and mechanical properties of C61 gear steel were studied. The results show that when the quenching temperature is 950 ℃, the mechanical properties of the C61 gear steel are the best, and the tensile strength, yield strength, elongation and reduction of area are 1162 MPa, 1154 MPa, 12.1% and 50.82% respectively. With the increase of quenching temperature, the strength and hardness of the C61 gear steel decrease gradually, and the elongation and reduction of area increase first and then decrease. The carbides of the tested steel also gradually dissolve with the increase of quenching temperature and almost all dissolve at 950 ℃. When the quenching temperature is low, the martensite lath in the microstructure is smaller, and with the increase of quenching temperature, the size of martensite lath increases and coarsening, which leads to the decrease of the strength and hardness of the C61 gear steel. In addition, the fracture behavior of the C61 gear steel gradually changes from ductile fracture to quasi-cleavage fracture.
作者
梁晓东
王晨充
李亮
于文峰
王旭
吴明
LIANG Xiao-dong;WANG Chen-chong;LI Liang;YU Wen-feng;WANG Xu;WU Ming(School of Mechanical Engineering,Liaoning Shihua University,Fushun 113001,China;State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China;Shenyang Aerosun-futai Expansion Joint Co Ltd,Shenyang 110023,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2020年第11期79-86,共8页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51574147,51790481)。
关键词
齿轮钢
淬火温度
力学性能
显微组织
断裂行为
gear steel
quenching temperature
mechanical property
microstructure
fracture behavior
作者简介
梁晓东(1993-),男,硕士研究生,主要研究方向为金属热处理,E-mail:1326411949@qq.com;通信作者:王旭(1979-),男,副教授,博士,主要研究方向为金属材料,发表论文50余篇,E-mail:wangxu@lnpu.edu.cn。
