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通过纯铁、18CrMnTi、35CrMo、38CrMoAl和40Cr工业用钢可控离子渗氨,系统地研究了双相(ε+γ′)层和单相(γ′)层各种力学性能特性。除证实离子渗氮渗层组织致密,显著地提高钢的疲劳强度、耐磨性外,还发现单相层是一种较为理想的渗层。它具有优越的强韧性配合。与双相层相比较,单相层具有较高的耐磨性(特别是扰疲劳磨损)和韧性(声发射特性、弯曲强度、扭转角和冲击韧性),它对于改善弯曲疲劳极限有着重要作用。本文就渗层的磨损机制和疲劳极限的影响因素等问题进行了讨论。
Various mechanical properties of the dual-phase (ε + γ ’) and single-phase (γ’) layers were studied systematically by controlled ionized ammonia infiltration of pure iron, 18CrMnTi, 35CrMo, 38CrMoAl and 40Cr industrial steels. In addition to confirming the dense structure of ion nitriding layer, significantly improve the fatigue strength of steel, wear resistance, but also found that single-phase layer is a more ideal layer. It has superior toughness with. The single phase layer has a higher wear resistance (especially disturbance fatigue wear) and toughness (acoustic emission characteristics, bending strength, twist angle and impact toughness) than the two-phase layer, which plays an important role in improving the bending fatigue limit . In this paper, we discuss the wear mechanism of the layering and the influencing factors of the fatigue limit.