一种新型热冲压模具钢的高温摩擦磨损性能

Friction and wear behavior of a new type of hot stamping die steel at elevated temperature

将开发的新型热冲压模具钢作为试验钢,常用的热作模具钢H13作为对照钢,采用Bruker UMT-3型高温摩擦磨损设备,同时对试验钢和H13钢分别在400、500、600和700℃进行高温摩擦磨损试验。针对摩擦因数和磨损率两方面的试验结果,从微观角度、磨损机理、化学成分和碳化物类型等方面进行了分析和探讨。研究表明,试验钢的高温摩擦磨损性能优于H13钢,温度是影响热冲压模具钢摩擦磨损性能的重要因素,具体体现在氧化层厚度和基体硬度两方面。试验钢的磨损机制主要以氧化磨损和粘着磨损为主,而H13钢同时存在氧化磨损、粘着磨损和磨粒磨损。

Friction and wear behavior of a new type of hot stamping die steel and H13 steel were explored at 400,500,600 and 700 ℃ on Bruker UMT-3 wear tester. In terms of the test results of friction coefficient and wear rate,the friction and wear behavior were analyzed and discussed from microscopic aspect,wear mechanism,chemical composition and carbide type. The results show that the temperature is an important factor for friction and wear behavior of hot stamping die steel at elevated temperature. Friction and wear behavior at elevated temperature of the tested steel is better than that of the H13 steel,and which concretely reflects in two aspects of the matrix hardness and thickness of the oxide layer. Wear mechanisms of the tested steel are mainly oxidation wear and adhesive wear,while H13 steel has oxidation wear,adhesive wear and abrasive wear.