Microstructure and properties of 304 stainless steel laser cladding on 27SiMn steel surface

doi:10.13251/j.issn.0254-6051.2020.04.040

Abstract

Abstract: After finding the best laser power for 304 stainless steel laser cladding on 27SiMn steel surface by single laser cladding experiments under different laser power, multilayer accumulative 304 stainless steel laser clad layer was prepared by using such a power, and its microstructure was analyzed. The tensile properties and fracture morphology of the 27SiMn steel and the 304 stainless steel clad layer were compared. The results show that a good metallurgical bond is achieved between the clad layer and the substrate, and columnar crystals with typical directional solidification characteristics are present in the clad layer. The tensile strength of the clad layer is equal to that of the substrate, while the elongation is obviously higher than that of the substrate. The dimples with typical plastic fracture characteristics appear at the tensile fracture of both the clad layer and the substrate material, and the size and depth of the dimples of the clad layer are obviously larger than that of the substrate.

Key words: 27SiMn steel, 304 stainless steel, laser cladding, microstructure, tensile properties, fracture morphology

CLC Number:

TN249

Wang Xiancai, Zhang Yapu, Chai Rongxia. Microstructure and properties of 304 stainless steel laser cladding on 27SiMn steel surface[J]. Heat Treatment of Metals, 2020, 45(4): 188-193.

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