动力学变质剂对激光选择烧结硬化层冷裂纹的抑制作用

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。

Restraining Role of Dynamics Metamorphic Materials to the Cold Crack of Hardened Layers Obtained by Selective Laser Sintering

Proceeded from the point of view to alter the crystallization state, the effect of excitation plasticization by use of dynamics metamorphic materials containning silicon or containning zircornium etc. for the wear resistant alloy layer obtained by selective laser sintering is studied in this paper. The influence of the metamophic materials on the sintering layer′s chemical composition and on the crystalline state is discussed. The result thows that the structure of the sintering layer can be thinned down and the phenomenon of brittlely cracking in the sintering layer may be eliminated by use of appropriate dynamics metamophic materials.