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Effect of Ni content on cracking susceptibility and microstructure of laser-clad FeCrNiBSi alloy
Authors:Song Wulin  Zhu Peidi  Cui Kun
Affiliation:

Department of Materials, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, People's Republic of China

Abstract:An investigation is reported of the laser surface cladding of self-fluxing Fe---Cr---Ni---B---Si alloys on a medium carbon steel substrate using the preplaced powder method. The cracking susceptibility and microstructure of the laser-cladding layer have been studied in terms of its Ni content, thermal expansion coefficient and wettability on the substrate. With increasing Ni content the cracking susceptibility of the cladding layer decreases and its microstructure changes from a “bamboo leaf” structure to a typical dendritic one.
Keywords:Ni content  Laser cladding  Cracking susceptibility
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