Effect of Ti content on microstructure and properties of martensitic wear resistant steel with high Ti

doi:10.13251/j.issn.0254-6051.2023.01.007

Abstract

Abstract: Mechanical properties and wear resistance of low alloy martensitic wear resistant steels with 0.31%Ti and 0.55%Ti were measured, and the corresponding microstructure was analyzed by SEM and inclusion automatic scanning system, then the effect of Ti content in the steel on microstructure and properties was discussed. The results show that compared with the steel containing 0.31%Ti, the steel containing 0.55%Ti has more precipitation of TiC particles, which reduces the C equivalent of the matrix, resulting in a significantly lower tensile strength of the quenched steel, but more TiC precipitation also produces stronger precipitation strengthening, which makes the yield strength and hardness of the two steels close to each other. On the other hand, when the Ti content is higher, the micron-sized TiC particles in the steel increase correspondingly, which significantly improves the wear resistance of the tested steel.

Key words: wear-resistant steel, martensitic steel, micro-sized TiC, wear resistance

CLC Number:

TG162

Liu Haisheng, Zhang Xiaojuan, Yuan Shaoqiang, Li Leilei, Wu Huibin, Yang Yuehui. Effect of Ti content on microstructure and properties of martensitic wear resistant steel with high Ti[J]. Heat Treatment of Metals, 2023, 48(1): 35-39.

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