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| Influence of varying forms of bionic units on repairing remaining quenching surface of gray cast iron |
| Hui Li1,2, Li Feng1,2, Hong Zhou1,2, Peng Zhang1,2, Ti Zhou3, Qi Sui1,2, Lu-quan Ren4 |
1 Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, Changchun 130025, Jilin, China
2 School of Material Science and Engineering, Jilin University, Changchun 130025, Jilin, China
3 School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, Jilin, China
4 Key Laboratory of Terrain Machinery Bionics Engineering (Jilin University), Ministry of Education, Changchun 130025, Jilin, China |
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Abstract In order to repair and reuse remaining quenching surface (RQS) divided into severely worn surface (SWun-S) and mildly worn surface (MWun-S) of abandoned gray cast iron guide rail, inspired by the bionic theory, varying forms of bionic units such as spot (Sp-S), striation (St-S), and reticulation (Re-S) were fabricated on RQS of gray cast iron through laser processing technology. Firstly, the microstructure, phase composition, and microhardness of bionic units and RQS were analyzed by optical microscopy as well as X-ray diffraction instrument and scanning electron microscopy, respectively. Secondly, the oil lubrication wear experiment was performed on homemade line reciprocating wear machine. The results demonstrated that the bionic units had a significant effect on improving wear resistance of RQS of abandoned guide rail due to the microstructure and higher hardness. In addition, the weight loss ratios of MWun-S, Sp-S, St-S, and Re-S samples were decreased by 36.72%, 36.78%, 62.26%, and 80.39%, respectively, compared with that of SWun-S sample. The mechanism of wear resistance enhancement was also discussed.
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Received: 06 November 2019
Published: 25 February 2021
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Hui Li,Li Feng,Hong Zhou, et al. Influence of varying forms of bionic units on repairing remaining quenching surface of gray cast iron[J]. Journal of Iron and Steel Research International, 2021, 28(2): 201-210.
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2021, Vol. 28 
