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风动凿岩机是矿山采掘的主要机器,活塞则是其中的易损件,其失效形式之一是冲击端面在拉压应力作用下的接触疲劳剥落.根据小能量多冲的观点,材料的多冲抗力,主要取决于强度,而接触疲劳裂纹起源于表层或过渡层,探讨获得足够强韧性及高硬度表层的途径,是很有意义的. 活塞常用钢是20CrMnMo,该钢虽具有较高的机械性能、淬透性、渗碳后也可获得较高表面硬度和耐磨性;但渗碳层中的碳
Pneumatic rock drilling machine is the main mining machine, the piston is one of the vulnerable parts, one of the failure forms of the impact of the end surface of the tensile stress under the action of contact fatigue spalling.According to the small energy multi-red point of view, the material multi-red Resistance, mainly depends on the strength, and contact fatigue cracks originate in the surface or transition layer, to explore ways to obtain sufficient strength and toughness and high hardness of the surface, it is significant.Plug steel is 20CrMnMo, although the steel has a high mechanical Performance, hardenability, carburizing can also get higher surface hardness and wear resistance; but carburizing layer of carbon