冲击载荷对10Mn钢磨损性能的影响及耐磨机制分析

通过水韧处理配合450℃时效热处理工艺,研究10Mn钢在2和5 J冲击载荷下耐磨性能.结果表明,10Mni钢在5J冲击载荷下失重量更少,加工硬化的速率更快,并且在不同冲击载荷下磨损失重量都出现了周期性变化.磨损表面SEM结果表明,表面存在犁削磨损、凿削磨损、裂纹.通过XRD数据对亚表面奥氏体和马氏体体积分数进行定量计算...

Effect of impact load on wear resistance of 10Mn steel and analysis of wear resistance mechanism

The wear resistance of 10Mn steel under 2 and 5J impact load was studied by water toughening treatment and 450℃ aging heat treatment. The results show that the weight loss of 10Mn steel under 5J impact load is less, the work hardening rate is faster, and the weight loss of 10Mn steel changes periodically under different impact loads. SEM results show that there are ploughing wear, chiseling wear and cracks on the worn surface. The volume fraction of austenite and martensite on the subsurface was quantitatively calculated by XRD data. With the increase of impact energy, the content of austenite decreases and the content of martensite increases. TEM analysis shows that there are high density dislocations, stacking faults and deformation twins in the worn layer, and the dislocations accumulated in the carbides. EBSD results of subsurface layer show that deformation martensite and crack are formed during wear process. Martensite nucleates and grows in high dislocation density region, while crack propagates along austenite grain boundary. Finally, it is blocked in high dislocation density region and deformation martensite and stops propagation. The wear resistance mechanism consists of dislocation strengthening, deformation induced transformation strengthening and deformation twin strengthening.