摘要
采用摩擦磨损实验的方法,研究了工作温度对于三种冷作模具钢耐磨性的影响.结果表明:在不同的工作温度下,三种冷作模具钢的对磨表面均存在磨粒磨损,当工作温度达到195℃及以上时,对磨表面的主要磨损机制由磨粒磨损转为氧化磨损,并伴随着粘着磨损和疲劳磨损.随着工作温度的升高,9CrSi中的M7C3共晶碳化物的含量先上升后下降,其磨损量与M7C3的含量呈正相关关系;ASSAB88中的M7C3共晶碳化物含量则持续降低,且磨损量与M7C3的含量呈正相关关系并趋于平缓.而随着工作温度的升高,012Al中虽没有M7C3但总碳化物的含量逐渐减少,磨损量与总体碳化物含量呈正相关关系.
Comparison tests of dry sliding wear under different working temperature were carried out by using a friction and wear tester.Three kinds of cold-working die steel were evaluated and ranked in term of wear weight.Wear mechanism was determined by observing and analyzing the morphology of the worn surface.Results indicate that abrasive wear can be always found under different working temperature.As working temperature increases to 195℃ or above,surface oxidation become obvious and oxidation wear plays a larger role in wear mechanism.With the increase of temperature,the content of M7C3 in 9CrSi increases first then decreases.And the positive relationship between total wear rate of weight and M7C3 eutectic carbide content was revealed.The content of M7C3 in ASSAB88reduces gradually,wear rate is positively correlated with M7C3 eutectic carbide content and flatten out.There is no M7C3 in 012Al,however with the increase of temperature,total carbide content reduces gradually.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第8期106-110,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51275543)
重庆市科委应用开发项目(cstc2014yykfC70003)
关键词
冷作模具钢
工作温度
M7C3共晶碳化物
磨损机制
耐磨性
cold-working die steel
working temperature
M7C3 eutectic carbide
wear mechanism
wear resistance
