高钒高速钢、高铬铸铁冷轧辊磨损试验研究

通过对高钒高速钢、高铬铸铁轧辊试样的冷轧模拟试验研究表明,高钒高速钢由于其均匀分布、形态较好的高硬度碳化物使其耐磨性大幅提高,在同等试验条件下为高铬铸铁试样的4.4倍.微观分析表明,轧辊试样磨损机理主要表现为疲劳剥落,浅层剥落主要表现为棘齿裂纹的萌生、扩展与断裂的过程;高铬铸铁轧辊试样深层失效主要表现为MC3型碳化物的断裂并形成裂纹源并在疲劳循环过程中断裂失效,高钒高速钢轧辊试样MC型碳化物有少量破碎并形成晶间裂纹源,主要失效方式表现为碳化物颗粒剥落,并对此进行了定性的力学解释.

Investigation of the Damage in High Vanadium High Speed Steel and High Chrome Cast Iron Roll Under the Laboratory Condition

The wear resistance between high vanadium high speed steel and high chrome cast iron roll was studied under the laboratory condition. The result shows that the wear resistance of the high vanadium high speed steel was 4.4 times than that of the high chrome cast iron and the wear mechanisms were worn out and scaled off. The M7C3 carbides in the high chrome cast iron ruptured and form the headstream of the crack;Otherwise the MC carbides in the high vanadium high speed steel worn off from the wear surface. This paper also discussed the wear mechanisms in mechanics.