TiC弥散强化2Cr13钢的显微组织及耐磨性

运用原位合成工艺可以制备出含量为3%的微米级TiC颗粒弥散强化2Cr13不锈钢,TiC颗粒在强化钢中分布均匀,与基体结合良好。TiC颗粒的加入,使2Cr13不锈钢的室温强度提高10%左右,硬度小幅增加,但塑性有所降低。用环-块摩擦磨损试验机研究了油润滑下弥散强化钢的滑动摩擦磨损性能,发现TiC颗粒承受载荷,从而可有效地提高弥散强化钢的耐磨性。与未增强的2Cr13基体相比,弥散强化钢的摩擦系数平稳且较低,而耐磨性提高3倍以上。

Microstructure and Wear-Resisting Properties of 2Cr13 Stainless Steel Strengthened by In-Situ TiC Dispersion

2Cr13 stainless steel with 3% TiC addition has been synthesized by in-situ reaction during melting process. The distribution of TiC particles in the steel is uniform and interfacial bonding between TiC reinforcement and steel is strong. For 2Cr13 stainless steel, the addition of TiC caused a room strength increase of about 10 percent, but slight decrease of ductility. The sliding friction and wear properties of the strengthened steel were studied using a block-on-ring apparatus. Experimental results show that TiC particles exposed on the sliding surface of the strengthened steel supported the load, thus preventing the matrix from severe wear. Compared with the unreinforced matrix, the strengthened steel had stable and comparatively lower friction coefficient and wear-resistance had been multiplied 3 times and over.