Microstructures and mechanical properties of low carbon fishplate materials

金属学报(英文版), 2010, (3): 176-184.

^1, , ^2, , ^3,

1.School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

2.School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

3.School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

关键词：材料力学性能 , 低碳 , 微结构 , 显微组织 , 准贝氏体 , 测定结果 , 屈服强度 , 强化机制

Microstructures and mechanical properties of low carbon fishplate materials

Fumin XU ^1, , Kai WEN ^2, , Yi TAN ^3,

1.School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

2.School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

3.School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

Keywords： Fishplate , Microstructure , Mechanical property , Strengthening ,

Two kinds of low carbon bainite materials were developed for fishplate usage.The microstructures and mechanical properties were measured in details.The results showed that one material was composed of fine granular bainite with the yield strength of 722 MPa at room temperature and 738 MPa at-55℃, and elongation percentages of 60.7% and 41.7%, respectively.The other one had a meta-bainite microstructure with corresponding strengths of 568.5 MPa and 700 MPa, elongation percentages of 63.5% and 67.1%, respectively.These values are all superior to the home-made B7 steel and the fishplate materials made in Japan.The major strengthening mechanisms were discussed and attributed to the solid solution, complex phases, fine grain and dislocation strengthening.

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Microstructures and mechanical properties of low carbon fishplate materials

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