南阳师范学院学报2018，Vol.17Issue(4)：22-29,8.
不同种类激光熔覆粉末的性能研究
Study on the properties of different laser cladding powders
张自强 1程相榜 1白海明1
作者信息
- 1. 郑州煤矿机械集团股份有限公司,河南 郑州450016
- 折叠
摘要
Abstract
Iron-base stainless steel 316L, super stainless steel and Ni base alloy were selected as the research ob-jects. Powders were cladded on the surface of alloy steel by using laser cladding technology. The cladding layer microstructure was characterized by SEM images. The chemical composition of the cladding layer and the sub-strate were tested by EDS spectrum analysis. The bending properties of the cladding layer was tested by tensile testing machine. The salt fog corrosion resistance performance of the cladding layer was studied by salt spray test method and polarized voltage method. The results show that the grain morphology of 316L cladding layer is irreg-ular, the grain size is larger than other cladding layers, a part of them is the columnar grain. The super stainless steel cladding layer is uniform, which has a large number of equiaxed crystals. The structure of Ni base alloy cladding layer is uniform, on which there is a certain amount of homogeneous and small precipitation phase. The hardness of Ni base alloy on the position of cladding layer is harder clearly than 316L and super stainless steel. Obvious boundaries can be observed between the cladding layer and the matrix of the three materials. The width of the fusion zone is about 100 micrometer. The chemical composition of the test points is consistent with the composition of the cladding material and the matrix. There is good combination strength between the cladding layer and substrate. The surface of the cladding layer of three materials did not show red spot or red rust after 480 hours of CASS test.关键词
激光熔覆/316L/超级不锈钢/镍基合金/微观组织/硬度/CASS盐雾试验/化学成分Key words
laser cladding/316L/super stainless steel/Ni base alloy/microstructure/hardness/CASS test/chemical composition分类
矿业与冶金引用本文复制引用
张自强,程相榜,白海明..不同种类激光熔覆粉末的性能研究[J].南阳师范学院学报,2018,17(4):22-29,8.
