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本文研究了5CrMnMo钢的硼锆共渗层与渗硼层在磨粒和冲击疲劳磨损试验时的磨损行为。结果表明,在磨粒和冲击疲劳磨损条件下,共渗层的耐磨性比渗硼层的优越,其因在于共渗层脆性比渗硼层的低。共渗与渗硼后经等温淬火的试样比不经等温淬火的试样,其冲击疲劳下的耐磨性得到明显地改善,可认为是残余应力降低与过渡区强化的结果。本试验中的磨损机制,磨粒磨损是塑性变形与犁削机制,冲击疲劳磨损则是冲击疲劳、滑动与磨粒磨损的复合机制。
In this paper, the wear behavior of boro-zirconized and boronized layers in 5CrMnMo steel during abrasive wear and impact fatigue wear tests was investigated. The results show that the abrasion resistance of the co-permeable layer is better than that of the boronizing layer under abrasive and impact fatigue wear conditions because the brittleness of the co-permeation layer is lower than that of the boronizing layer. After infiltrating and infiltrating, the austempered samples obviously improved the wear resistance under impact fatigue compared with the non-isothermal quenched samples, which could be regarded as the result of the decrease of residual stress and the strengthening of the transition zone. The wear mechanism in this experiment, abrasive wear is the plastic deformation and plowing mechanism, the impact of fatigue wear is the impact fatigue, sliding and abrasive wear composite mechanism.