新型TiC颗粒增强型耐磨钢的耐磨性能研究

Study on Wear Resistance of TiC Grain Reinforced Wear Resistant Steel

针对国内外研究的TiC粒子增强型耐磨钢磨损机理的特点,制定新型耐磨钢的成分配比,在实验室中用传统耐磨钢作为对比进行磨损试验。利用金相和扫描电镜对传统耐磨钢和新型耐磨钢进行微观结构和磨损形貌观察,明确TiC粒子增强型耐磨钢的磨损机理。对试验结果分析表明:在不同回火温度下TiC粒子增强型耐磨钢的耐磨性能要比传统耐磨钢提升1.3倍以上,且TiC粒子增强型耐磨钢在550~650℃回火时,随着温度的升高耐磨性能提升,分析是Ti元素能够在高温回火过程中析出大量微米级别TiC大颗粒硬质相,这种内生硬质相的存在能够有效提升钢的耐磨性能。

Based on the wear mechanism of TiC particle enhanced wear-resistant steel studied at home and abroad,the composition ratio of new wear-resistant steel was formulated,and the traditional wear-resistant steel was used as a comparison in the laboratory for wear test.The microstructure and wear morphology of traditional and new wear-resistant steels were observed by means of metallography and scanning electron microscopy.And the wear mechanism of TiC particle enhanced wear-resistant steels was determined.The test results show that under different tempering temperature,the wear-resisting performance of TiC particle enhanced wear resistance steel is increased 1.3 times above than that of traditional wear-resistant steel,and during tempered between 550~650℃,the wear-resisting performance of TiC particle enhanced wear resistance steel is increased with the increasing of temperature,the reason for wear resistant steel in high temperature tempering process is related to TiC data hard phase particles of micron level,the existence of the endogenous hard phase can effectively improve wear resistance of steel.