变质处理M2高速钢的组织和性能研究

The study of the structures and properties of modification M2 cast high speed steel

用Y -K -Na对M2高速钢进行复合变质处理 ,研究了变质处理对M2高速钢组织和性能的影响。结果表明 ,M2铸造高速钢经Y -K -Na复合变质处理后 ,组织明显细化 ,共晶碳化物由网状分布变为块状和团球状 ,冲击韧性提高 70 7% ,耐磨性也明显提高 ,各项力学性能接近锻造M2高速钢的水平。

M2 high speed steel was modified by Y-K-Na,the effects of complex modification on the structures and properties of M2 cast high speed steel have been researched.The results show that the structures of modified M2 cast high speed steel by means of Y-K-Na were obviously refined,network eutectic carbides were changed into spherical.After modification,the impact toughness was increased by 70.7%,wear resistance was also increased,all mechanical properties of inoculation M2 high speed steel near to that of forging M2 high speed steel,the modified mechanism was also analyzed.