Vacuum laser cladding and effect of Hf on the cracking susceptibility and the microstructure of Fe–Cr–Ni laser-clad layer
Vacuum laser cladding and effect of Hf on the cracking susceptibility and the microstructure of Fe–Cr–Ni laser-clad layer
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DOI：
10.1016/s0257-8972(00)00532-6
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发表时间：
2000-04
影响因子：
5.4
通讯作者：
Song Wulin;J. Echigoya;Zhu Beidi;C. Xie;Huang Wei;C. Kun
中科院分区：
文献类型：
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作者：
Song Wulin;J. Echigoya;Zhu Beidi;C. Xie;Huang Wei;C. Kun
据报道，采用气体保护或真空保护的预置粉末方法，在中碳钢基体上激光表面熔覆自熔性 Fe-Cr-Ni 合金。研究了Hf添加情况下激光熔覆层的开裂敏感性和微观结构。 Hf可以将Fe-Cr-Ni合金熔覆层的显微组织从共晶转变为亚共晶。当激光熔覆层中的 Hf 含量约为 0.9% wt 时，裂纹敏感性最低。但要达到这个效果就必须有3.0%wt。气体保护时合金粉末中的Hf。还报道了保护条件对激光熔覆层开裂敏感性的影响
An investigation is reported of the laser surface cladding of self-fluxing Fe–Cr–Ni alloys on a medium carbon steel substrate using the preplaced powders method with gas shielding or vacuum protection. The cracking susceptibility and microstructure of the laser-clad layer have been studied in terms of Hf additions. Hf can change the microstructure of the Fe–Cr–Ni alloy clad layer from eutectic to hypoeutectic. The lowest cracking susceptibility occurs when the Hf content in the laser-clad layer is approximately 0.9% wt. But to achieve this effect there must be 3.0% wt. Hf in the alloy powders when shielding with gas. The effect of the protecting condition on cracking susceptibility of the laser-cladding layer is also reported