Effect of Alloying Elements Ni/Al on Impact Abrasive Wear Behavior of 45Si2MnCr2Mo Ultra-high Strength Steel
YANG Ming1,2, CHEN Xiaohua3,*, WANG Zidong1,3,*, WANG Yanlin1, ZUO Lingli2
1 School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China 2 Beijing National Innovation of Lightweight Ltd., Beijing 100083, China 3 State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
Abstract: In this work, three-body abrasive wear experiments were carried out on 45Si2MnCr2Mo ultra-high strength steels with different Ni/Al contents by using the MLD-10 impact abrasive wear tester. The effects of different Ni/Al contents on the wear weight loss, the depth of hardened layer, and the microstructure of worn surface and subsurface of ultra-highstrength steel were systematically studied, and the wear mechanism was discussed. The results show that when the content of Ni was 3%, the wear resistance of ultra-high strength steel was the best, and the wear percentage was the lowest, which was only 0.391%. However, when 0.5% Al was added, the wear resistance decreased by 1.48, and the wear percentage increased to 0.42%. Therefore, the addition of Ni element can improve the wear performance, but it is not conducive to improve the wear performance when Al and Ni are added at the same time. The wear weight loss is reflected by the embedded quantity and size of abrasives, depression and spalling. After impact abrasive wear test, the surface and subsurface areas of ultra-high strength steel are strengt-hened by work hardening. When the content of Ni is 3%, the ultra-high strength steel has the best comprehensive surface hardness, hardening percentage and effective hardened layer depth, and the wear process is more uniform. The wear forms of ultra-highstrength steel are mainly furrows, spalling, cracks, embedded abrasive particles, furrow spray and extrusion accumulation.
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2023, Vol. 37 
