Microstructure and mechanical properties of (Fe, Cr)7C3-Fe/Hadfield steel composites

被引：4
作者：
Zhong, Lisheng [1 ,2 ]
Wu, Tiandong [1 ,2 ]
Guo, Siyou [3 ]
Li, Jinshan [1 ,2 ]
机构：
[1] Northwestern Polytech Univ, Shool Mat Sci & Engn, Xian 710072, Peoples R China
[2] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
[3] Shaanxi Univ Technol, Shool Mat Sci & Engn, Hanzhong, Peoples R China
来源：
JOURNAL OF COMPOSITE MATERIALS | 2015年 / 49卷 / 20期
基金：
国家高技术研究发展计划(863计划);
关键词：
Composites; in situ synthesis; wear resistance; impact toughness; WEAR BEHAVIOR; MATRIX; RESISTANCE;
D O I：
10.1177/0021998314547663
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
In this work, (Fe, Cr)(7)C-3-Fe/Hadfield steel composites were fabricated through in situ synthesis with infiltration casting and subsequent heat treatment. The microstructure, microhardness, impact toughness, and wear resistance of (Fe, Cr)(7)C-3-Fe/Hadfield steel composites were studied through scanning electron microscopy, X-ray diffraction, microhardness testing, impact testing, and wear testing. The results show that austenite and (Fe, Cr)(7)C-3 carbides are predominant phases in the reinforcing bar of the composites. The (Fe, Cr)(7)C-3 particulates have an important role in improving the mechanical properties of the composite. The best wear resistance of the composites was 1.6 times higher than that of Hadfield steel under a 5-N load. The wear resistance mechanism was not only due to the higher hardness of the (Fe, Cr)(7)C-3-Fe bundle but also to the excellent work hardening ability of the Hadfield steel matrix. The fracture mechanism was in the ductile-brittle fracture mode. The good fracture toughness of the (Fe, Cr)(7)C-3-Fe/Hadfield steel composite is mainly due to the presence of microcracks in the interface and the high toughness of the Hadfield steel matrix.
引用
收藏
页码：2433 / 2440
页数：8
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