Effects of Co on the cracking susceptibility and the microstructure of Fe–Cr–Ni laser-clad layer
Effects of Co on the cracking susceptibility and the microstructure of Fe–Cr–Ni laser-clad layer
复制标题
DOI：
10.1016/s0257-8972(00)01168-3
复制
发表时间：
2001-04
影响因子：
5.4
通讯作者：
Song Wulin;J. Echigoya;Zhu Beidi;C. Xie;C. Kun
中科院分区：
文献类型：
--
作者：
Song Wulin;J. Echigoya;Zhu Beidi;C. Xie;C. Kun
采用CO2激光器和氩气保护气体，在中碳钢基体上进行了Fe-Cr-Ni自熔性合金的激光熔覆。研究了激光熔覆层的裂纹敏感性和显微组织。Co能使Fe-Cr-Ni合金熔覆层的组织由共晶转变为亚共晶，降低熔覆层的开裂敏感性。然而，这些结果不仅与激光熔覆合金中的Co含量有关，而且与重叠轨迹的数量有关。随着熔覆层中Co含量的增加，激光熔覆层的开裂敏感性降低，亚共晶组织的搭接道数增加。同时，Co不改变熔覆层的硬度。
The laser cladding of self-fluxing Fe–Cr–Ni alloys on a medium carbon steel substrate was performed using a CO2laser and Ar shielding gas that was blown into a molten pool. The cracking susceptibility and microstructure of the laser-clad layer were studied in terms of Co additions. Co can change the microstructure of a Fe–Cr–Ni alloy clad layer from eutectic to hypoeutectic and decrease the cracking susceptibility of clad layers. However, these results relate not only to the Co content in the laser-clad alloys, but also the number of overlapping tracks. With the increment of Co content in clad layer, the cracking susceptibility of the laser cladding layer decreases and the number of overlapping tracks with hypoeutectic structure increases. At the same time, Co does not change the hardness of the clad layer.