从改变结晶状态的角度出发，研究了含硅、含锆等动力学变质剂对耐磨合金激光选择烧结成型的激励增塑作用，探讨了变质剂对烧结合金层化学成分及晶体形态的影响。结果表明，采用合适的动力学变质剂可以细化烧结合金层的组织，消除烧结合金层脆性开裂现象。 From the point of view of changing the crystallization state, the effect of modifier containing silicon and zirconium on the excitation and plasticization of the wear-resistant alloy by laser selective sintering was studied, and the influence of modifier on the chemical composition and crystal morphology of the sintered alloy layer was discussed. The results show that the microstructure of the sintered alloy layer can be refined and the brittle cracking of the sintered alloy layer can be eliminated by adopting appropriate dynamic modifier.