首页|The Kirkendall effect on erosion resistance of chrome-coated 25Cr3Mo2WNiV and 30SiMn2MoV gun barrel steels
The Kirkendall effect on erosion resistance of chrome-coated 25Cr3Mo2WNiV and 30SiMn2MoV gun barrel steels
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This study aimed to investigate the erosion behavior and mechanism of a newly developed 25Cr3Mo2WNiV steel with a chrome coating using promoted ignition combustion tests.The erosion threshold pressure and temperature of the chrome-coated 25Cr3Mo2WNiV steel were determined to be 0.2 MPa and 254.3 K higher than those of traditional chrome-coated 30SiMn2MoV steel.Furthermore,Kirkendall voids and inter-diffusion between the Cr coating and matrix were first observed before ero-sion.The improved erosion resistance of the chrome-coated 25Cr3Mo2WNiV steel was attributed to the suppression of the Kirkendall effect,which minimized heat generation at the Cr/matrix interface by pre-venting oxygen diffusion and reducing oxygen affinity.
Key Laboratory for Advanced Materials Processing State,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China
National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials,School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471003,China
Technology Fund of the Ministry of science and technologyFundamental Research Funds for the Central UniversitiesNational Natural Science Foundation of China
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