Effect of carbon content on microstructure and corrosion behavior of hypereutectic Fe-Cr-C claddings

被引：27

作者：

Chang, Chia-Ming ^{[1
]}

Hsieh, Chih-Chun ^{[1
]}

Lin, Chi-Ming ^{[1
]}

Chen, Jie-Hao ^{[1
]}

Fan, Chih-Ming ^{[2
]}

Wu, Weite ^{[1
]}

机构：

[1] Natl Chung Hsing Univ, Dept Mat Sci & Engn, Taichung 40227, Taiwan

[2] Kuang Tai Met Ind Co Ltd, Kaohsiung, Taiwan

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2010年 / 123卷 / 01期

关键词：

Carbides; Welding; Microstructure; Corrosion; WHITE CAST IRONS; STRUCTURAL CHARACTERISTICS; (CR; FE)(23)C-6; CARBIDES; WEAR BEHAVIOR; RESISTANCE; SOLIDIFICATION; ALLOYS;

D O I：

10.1016/j.matchemphys.2010.04.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The aim of this study was to examine the influence of carbon content on the microstructures and corrosion characteristics. The results showed that the hypereutectic microstructure comprised primary (Cr,Fe)(7)C-3 carbides and the eutectic colonies [gamma-Fe + (Cr,Fe)(7)C-3]. The amounts of primary (Cr,Fe)(7)C-3 carbides increased from 33.81 to 86.14% when carbon content increased from 3.73 to 4.85 wt%. The corrosion resistance of the hypereutectic alloy with 4.85 wt% C was about 20 times higher than that with 3.73 wt% C. The galvanic corrosion occurred in all claddings due to difference of corrosion potential between primary carbide and austenite. The dense distribution of primary carbides could retard the austenitic matrix from selective corrosion. The austenite dissolved the Fe2+ ions and formed a Cr2O3 film under 3.5% NaCl aqueous solution. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：241 / 246

页数：6

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