论文部分内容阅读
使用优化工艺对冷作模具钢SDC99进行TD法盐浴渗钒,获得了厚度约13μm的VC渗钒层,并对其截面形貌、物相、结合力、显微硬度梯度和摩擦磨损性能进行了研究。结果表明,渗后截面由表及里为渗钒层、过渡层、基体;渗钒层主要由VC相组成,同时还有一些VC_x(x=0.65~0.90)相;渗层到基体的硬度呈下降趋势;渗层与基体结合强度约为72 N;经过TD处理的试样比未经处理的试样磨损体积减少70%,VC渗层的磨损机理为试样表面初期产生犁沟,随磨损试验的进行逐渐产生微裂纹并不断扩展,最终导致渗层呈薄片状剥落,表现为疲劳磨损的特征。
In the process of TD salt bath infiltration vanadium with SDC99, the VC vanadium layer with a thickness of about 13μm was obtained by using the optimized technology. The cross-sectional morphology, phase, cohesion, micro-hardness gradient and friction and wear properties Study. The results show that the post-permeation section is composed of vanadinite, transition layer and matrix. The vanadate layer is mainly composed of VC phase with some VC_x (x = 0.65-0.90) phases. The hardness of the layer from the layer to the substrate is And the bonding strength between the coating and the substrate was about 72 N. The TD treated sample had a 70% reduction in wear volume compared with the untreated sample. The wear mechanism of the VC coating was as follows: initial furrowing occurred on the surface of the sample, The test gradually microcracks and continue to expand, eventually leading to exfoliated sheet flaking, showing the characteristics of fatigue and wear.