RESEARCH PAPER |
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Effects of Micro-alloying of Chromium and Vanadium on Microstructure and Mechanical Properties of High Carbon Steel |
YUAN Xinjian1, LI Ci1, WANG Haodong1, LIANG Xuebo1, ZENG Dingding1, XIE Chaojie2
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1 College of Materials Science and Engineering, Chongqing University, Chongqing 400030; 2 Henan Best Steel Wire Products Co., LTD, Gongyi 451251 |
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Abstract In order to develop a high-carbon steel wire rod with better performance,new steels were designed and developed using chromium and/or vanadium micro-alloying method on the basis of the primary 70 steel. In addition, the influences of chromium and/or vanadium on microstructure and mechanical properties of the experimental steels were analyzed. After chromium and vanadium micro-alloying separately, the volume fraction of sorbite increased, lamellar space decreased, and the original austenite grain refined. Compared to 70 steel, chromium content and vanadium content increased, the tensile strength of the steels gradually improved and the corresponding elongation decreased. Complex micro-alloying of chromium and vanadium obviously optimized the microstructure of the steel, and the optimization effect is significantly better than individual micro-alloying of chromium and vanadium. By contrast with 70 steel, the strength of the steel produced by complex micro-alloying of chromium and vanadium notably increased and the plasticity decreased slightly. By comparison with 80 steel, the strength and plasticity of the steel prepared by complex micro-alloying of chromium and vanadium increased.
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Published: 02 May 2018
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