Plasma Electrolytic Borocarburizing Treatment on Q235 Low-carbon Steel and Its Properties
WANG Bin1,2, XUE Wen-bin1,2, JIN Xiao-yue1,2, WU Jie1,2, HUA Ming1,2, WU Zheng-long3
1. Key Laboratory for Beam Technology and Materials Modification (Ministry of Education), College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;
2. Beijing Radiation Center, Beijing 100875, China;
3. Analytical and Testing Center, Beijing Normal University, Beijing 100875, China
Abstract：Q235 low carbon steel was treated by plasma electrolytic borocarburizing (PEB/C) with the method of plasma electrolytic saturation.The morphology, structure and microhardness of borocarburizing layer on Q235 low-carbon steel were investigated. The electrochemical corrosion properties of Q235 steel before and after the PEB/C treatment were evaluated, and the tribological behavior of plasma electrolytic borocarburized Q235 low-carbon steel against GCr15 bear steel ball under different load was analyzed. The results show that the Q235 low-carbon steel forms a boride layer about 20μm thick after 330V and 30min PEB/C treatment. The boride layer mainly consists of Fe2B phase. The PEB/C treatment slightly improves the corrosion resistance of Q235 steel and significantly reduces the friction coefficient and wear rate of the Q235 steel against GCr15 steel ball. The friction coefficient and wear rate of PEB/C sample with a 5 N load are only 1/4 and 1/59 of that of the bare Q235 steel, respectively.
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