摘要
采用自制的WM-1型滚动磨损试验机研究了高钒高速钢经900～1 100℃淬火后550℃回火及1100℃淬火后250～550℃回火时的滚动磨损性能,并利用SEM对其显微组织进行了分析。结果表明:550℃回火条件下,低温淬火时基体组织以回火马氏体为主,随着淬火温度升高,残余奥氏体含量升高,马氏体含量相对减少,而耐磨性随淬火温度升高逐渐升高;1 100℃淬火条件下,低温回火时基体组织主要以残余奥氏体为主,随着回火温度升高,残余奥氏体量减少,而其耐磨性随回火温度的升高逐渐升高,达到一定值后开始降低。以耐磨性为评价标准,最佳热处理工艺为:1050℃淬火,450℃或550℃回火;研究结果揭示了适量的残余奥氏体有利于提高滚动磨损性能。
High vanadium high speed steel was carried out two groups of heat treatment, one was quenching at 900℃ to 1100℃ then tempering at 550℃, and the other was quenching at 1100℃ then tempering at 250℃ to 550℃. The rolling wear properties of high vanadium high speed steel were studied using WM-1 rolling wear tester and its microstructure was analysed by SEM. The results show that matrix is mainly tempered marteusite under the condition of quenching at low temperature and tempering at 550℃ ; retained austenite content increases and martensite content relatively decreases along with the increase of quenching temperature, meanwhile, the wear resistance improves. Under the condition of quenching at 1100℃ and tempering at low temperature, the matrix is mainly retained austenite, and with the increase of tempering temperature, retained austenite content decreases while its wear resistance increases till a determinate value then decreases. The research results show the optimal technology of heat treatment is quenching at 1050℃ then tempering at 450℃C or 550℃ ; and proper content of retained austenite profits to improve the rolling wear properties.
出处
《热加工工艺》
CSCD
北大核心
2006年第24期37-39,61,共4页
Hot Working Technology
基金
河南省重大科技攻关项目(0322020300)
关键词
热处理
高钒高速钢
显微组织
耐磨性
heat treatment
high vanadium high speed steel
microstrcture
wear resistance
