35CrMo截齿失效原因分析与预防

Failure Analysis and Prevention of 35CrMo Steel Pick

观察和测试了35Cr Mo钢失效截齿的组织及冲击性能,分析了截齿失效的原因,结果表明,35Cr Mo钢截齿断裂的主要原因为组织中存在过多的夹杂物,冲击值达不到要求。防止截齿断裂的主要途径为改善截齿材料的冶金质量及改进热处理工艺,以提高截齿的韧性,减轻截齿的磨损应增加截齿工作部分的硬度或在需要耐磨的部位增加耐磨层等。

The failure reason has been analyzed from the microstructure and impact property of pick materials. The results show that there are too much inclusions in 35 Cr Mo steel microstructure and impact toughness can not meet the property requirement of pick. To prevent pick from fracturing, we shall consider enhancing the metallurgical quality of pick materials, reducing the inclusions of steel,improving the heat treatment process and increasing the toughness of the materials of pick. In the wear resistant parts increase wear layer can reduce pick wear.