钨对铸态过共晶高铬铸铁组织、力学性能和磨料磨损性能的影响

Effect of tungsten on microstructure,mechanical and abrasive wear properties of hypereutectic high chromium cast iron

通过合金成分设计,制备了不同钨含量的过共晶高铬铸铁。研究了钨含量对材料微观组织、力学性能和磨料磨损性能的影响。结果表明,钨元素添加使得过共晶高铬铸铁中初生碳化物粗化,钨含量从0增加到2.84%时,高铬铸铁的硬度由51 HRC提高到56 HRC,冲击吸收能量先升高后下降,最高达5.8 J/cm^2。同时,过共晶高铬铸铁三体磨料磨损性能得到提高。

Hypereutectic high chromium cast iron with different tungsten content was prepared by adjusting alloy composition. The effect of tungsten on microstructure,mechanical and abrasive wear properties of as-cast specimens was studied. The results show that the addition of tungsten can coarsen the primary carbide and improve the mechanical and three-body abrasive wear properties of the samples. When the Tungsten content increases from 0 to 2. 84%,the hardness of high chromium cast iron raises from 51 HRC to 56 HRC,the impact energy absorption first rises then falls,the peak value is 5. 8 J/cm^2. Meanwhile,the three body abrasive wear performance of the cast iron is improved.