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应用激光束将镍基合金粉末,熔覆在A_3钢表面上,可以显著改善其抗磨损性能。本文重点论述了该合金激光熔覆层、结合区、基材热影响区的组织结构及其相应的性能。获得结果。(1)G112合金激光熔覆层的显微结构主要为γ-Ni、Ni_3B,CrB、M_(13)(CB)_6的亚共晶结构,其硬度HV_(0.1)542～649。(2)覆层与基材间的结合带是含有Fe、Ni、Cr等元素的相互扩散带。(3)热影响区的组织主要为先共析铁素体、魏氏组织和少量的索氏体。(4)G112合金激光熔覆层具有优异的抗磨损性能,其相对耐磨性是A_3钢的6—7倍。其磨损机制为粘着磨损、磨粒磨损,疲劳磨损的复合磨损。
The application of laser beam to nickel-based alloy powder, cladding the A 3 steel surface, can significantly improve its anti-wear properties. This article focuses on the alloy laser cladding layer, the binding zone, heat affected zone of the substrate structure and its corresponding properties. Get the result. (1) The microstructure of the G112 alloy is mainly composed of the hypoeutectic structure of γ-Ni, Ni_3B, CrB and M_ (13) (CB) _6 with HV0.154-2649. (2) The bonding zone between the coating and the substrate is an interdiffusion zone containing elements such as Fe, Ni and Cr. (3) The organization of the heat-affected zone is mainly pro-eutectoid ferrite, Wei’s tissue and a small amount of sorbite. (4) G112 alloy laser cladding has excellent wear resistance, the relative wear resistance is 6-7 times that of A_3 steel. The wear mechanism of adhesive wear, abrasive wear, fatigue wear composite wear.