In order to characterize the difference of microstructure and properties between oxyacetylene welding and laser cladding of cobalt-based Stellite 6 alloy wear-resistant layer

mature welding parameters are adopted to prepare wear-resistant layer of test plate. The effects of different technologies on the composition

hardness

microstructure and corrosion performance of Stellite 6 alloy coating are studied based on the test plate with wear resistant layer. The results show that for oxyacetylene welding and laser cladding technology

the hardness average value of Stellite 6 alloy coating can meet the acceptance requirements by using mature welding parameters

and no abnormal microstructure is found in metallographic test. By EDS energy spectrum analysis

it is found that the composition segregation of wear-resistant layer is obvious under the condition of oxyacetylene welding technology

especially the formation elements of hard particles such as C

W and so on. Under specific working condition

the electrochemical corrosion test shows that the passivation effect of wearresistant layer is more obvious under the condition of laser cladding.