抗磨耐热钢的耐磨性研究

Study of Wear resistance of Wear-resistant and Heat-resistant Steel

根据在高温氧化性气氛下磨料磨损的工况条件,合理设计了抗磨耐热钢材料的组织和化学成分。通过观察分析其金相组织,试样在铸态和900℃氧化后进行硬度和常温耐磨性试验,研究和分析了Ti、W元素对抗磨耐热钢组织、硬度和耐磨性的影响。结果表明:该材料的组织为奥氏体+少量铁素体+碳化物;材料的硬度和耐磨性不成正比;在Ti、W元素含量小于1%的范围以内,随着Ti、W元素含量的增加,抗磨耐热钢的硬度和耐磨性明显增加。

According to the working condition of high temperature and abrasive wear, the material structure and composition of the wear-resistant and heat-resistant steel are designed. The microstrueture is analyzed through the metallographical observing. The hardness and wear resistance at normal temperature are tested at cast and after 900℃ oxidation. And the influence of Ti and W on the mierostructure, hardness and wear resistance of the material is researched and analyzed. The experimental results are below. The microstructure of the material is austenite.When the amount of ferrite ＋ carbide. The hardness of material is not in direct proportion to the wear resistance. When the content of Ti and W element is below of, the hardness and wear resistance of the wear-resistant and heat-resistant steel increase with the content of Ti and W element increasing.