摘要
采用摩擦磨损实验,综合分析工作温度、载荷以及频率对Cr12Mo V冷作模具钢磨损量的影响及其作用规律;借助扫描电子显微镜(SEM)观察磨面的磨损特征,并用EDS进行磨面的能谱分析,根据观察到的磨损特征分析主要磨损机理。结果表明:工作温度、载荷以及频率对磨损量都有影响,低温低载低速的实验条件下耐磨性最好,高温高载低速的工况下耐磨性最差;不同工作温度下都存在磨粒磨损,当工作温度升高到195℃及以上时,氧化磨损的作用变大,并伴随着疲劳磨损和黏着磨损;Cr12Mo V的MC系列碳化物含量也随着温度的升高而增加,且磨损量与MC系列碳化物含量呈正相关关系。
The comparison tests of dry sliding wear for Cr12 Mo V cold-working die steel under different working condition were carried out by using a friction and wear tester. With the aid of SEM and EDS,wear mechanism was determined by observing and analyzing the morphology of the worn surface. Results indicate that working condition has a great influence on wear resistance of cold-working die steel,the highest wear resistance can be obtained at the condition of low working temperature,low pressure and low frequency,while Cr12 Mo V has worst wear resistance at high working temperature,high pressure and low frequency. The abrasive wear can be always found under different working temperature. As working temperature increases to 195 ℃ or above,oxidation wear plays a larger role in wear mechanism,which is accompanied by fatigue wear and adhesive wear. With the increase of temperature,the content of MC in Cr12 Mo V increases gradually,the total wear rate of weight has a positive correlation with MC eutectic carbide content.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2016年第5期40-44,共5页
Ordnance Material Science and Engineering
基金
国家自然科学基金面上项目(51275543)
重庆市科委应用开发项目(cstc2014yykf C70003)
