TY - JOUR
T1 - Microstructure and mechanical properties of (Fe, Cr)7C3-Fe/Hadfield steel composites
AU - Zhong, Lisheng
AU - Wu, Tiandong
AU - Guo, Siyou
AU - Li, Jinshan
N1 - Publisher Copyright:
© SAGE Publications.
PY - 2015/8/4
Y1 - 2015/8/4
N2 - In this work, (Fe, Cr)7C3-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)7C3-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)7C3 carbides are predominant phases in the reinforcing bar of the composites. The (Fe, Cr)7C3 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)7C3-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)7C3-Fe/Hadfield steel composite is mainly due to the presence of microcracks in the interface and the high toughness of the Hadfield steel matrix.
AB - In this work, (Fe, Cr)7C3-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)7C3-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)7C3 carbides are predominant phases in the reinforcing bar of the composites. The (Fe, Cr)7C3 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)7C3-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)7C3-Fe/Hadfield steel composite is mainly due to the presence of microcracks in the interface and the high toughness of the Hadfield steel matrix.
KW - Composites
KW - impact toughness
KW - in situ synthesis
KW - wear resistance
UR - https://www.scopus.com/pages/publications/84938498038
U2 - 10.1177/0021998314547663
DO - 10.1177/0021998314547663
M3 - 文章
AN - SCOPUS:84938498038
SN - 0021-9983
VL - 49
SP - 2433
EP - 2440
JO - Journal of Composite Materials
JF - Journal of Composite Materials
IS - 20
ER -