Effect of Electron Beam Remelting on the Wear Resistance of Iron-based Powder Metallurgy Surface
YANG Haiyi1,2, ZHANG Shasha1,2,*, YAO Zhengjun1,2, LIU Zili1,2
1 College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210000, China 2 Key Laboratory of Materials Preparation and Protection for Harsh Environment, Ministry of Industry and Information Technology, Nanjing 210000, China
Abstract: The surface of the iron-based powder metallurgy sample is remelted by electron beam in order to improve its hardness and wear resistance. Results show that the structure of the iron-based powder metallurgy sample has gradually transformed under the remelting treatment by electron beam, from austenite + pearlite to acicular martensite + residual austenite. With the current 8 mA, there still exists a amount of austenite since the structure has not been completely melted. When the current increases to 9 mA, the structure has completely transformed to martensite and residual austenite. As the current continues to increase, the content of residual austenite in the structure gradually decreases. The electron beam remelting treatment can effectively reduce the porosity of iron-based powder metallurgy samples and promote the martensite transformation, thereby improving the surface wear resistance and reducing the wear rate, and the wear resistance of the sample surface gradually improves with the increase of the current.
杨海屹, 张莎莎, 姚正军, 刘子利. 电子束重熔对铁基粉末冶金表面耐磨性能的影响[J]. 材料导报, 2022, 36(17): 20100136-5.
YANG Haiyi, ZHANG Shasha, YAO Zhengjun, LIU Zili. Effect of Electron Beam Remelting on the Wear Resistance of Iron-based Powder Metallurgy Surface. Materials Reports, 2022, 36(17): 20100136-5.
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