Effect of Electron Beam Remelting on the Wear Resistance of Iron-based Powder Metallurgy Surface

被引：0
|
作者：
Yang H. [1 ,2 ]
Zhang S. [1 ,2 ]
Yao Z. [1 ,2 ]
Liu Z. [1 ,2 ]
机构：
[1] College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing
[2] Key Laboratory of Materials Preparation and Protection for Harsh Environment, Ministry of Industry and Information Technology, Nanjing
来源：
Cailiao Daobao/Materials Reports | 2022年 / 36卷 / 17期
基金：
中国国家自然科学基金;
关键词：
electron beam remelting; hardness; powder metallurgy; wear resistance;
D O I：
10.11896/cldb.20100136
中图分类号：
学科分类号：
摘要：
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. © 2022 Cailiao Daobaoshe/ Materials Review. All rights reserved.
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