EFFECTS OF Si ON MECHANICAL PROPERTIES AND GRAIN BOUNDARY STRUCTURES IN HYPEREUTECTOID Mn STEELS

Acta Metall Sin

1996, Vol. 32

Issue (11): 1130-1138 DOI:

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EFFECTS OF Si ON MECHANICAL PROPERTIES AND GRAIN BOUNDARY STRUCTURES IN HYPEREUTECTOID Mn STEELS

ZHU Xiaodong; LI Chengji; ZHANG Shouhua (University of Scicnce and Technol ogy Beijing; Beijing 100083); ZOU Ming; SU Shihuai (Panzhihua Iron and Steel [Group] Company; Panzhihua 617067)

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ZHU Xiaodong; LI Chengji; ZHANG Shouhua (University of Scicnce and Technol ogy Beijing; Beijing 100083); ZOU Ming; SU Shihuai (Panzhihua Iron and Steel [Group] Company; Panzhihua 617067). EFFECTS OF Si ON MECHANICAL PROPERTIES AND GRAIN BOUNDARY STRUCTURES IN HYPEREUTECTOID Mn STEELS. Acta Metall Sin, 1996, 32(11): 1130-1138.

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Abstract The effects of Si on the grain boundary structure and mechanical properties of hypereutectoid Mn steels austenitized at 950℃ and isothemially transformed at 560℃were studied by means of SEM and TEM. The experimental results showed that the impact toughness and elongation can be improved by Si additions. The observation of microstructure revealed that grain boundary cemetite networks can be inhibited and grain boundary ferrite formed in these hypereutectoid steels by Si addition. The formation mechanism of grain boundary ferrite has also been discussed. Correspondent: LI Chengji, Professor, Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083

Key words: grain boundary ferrite hypereutetoid steel pearlite mechanical property

Received: 18 November 1996

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1996/V32/I11/1130

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