Effect of carbon content on microstructural characteristics of the hypereutectic Fe-Cr-C claddings

被引：25

作者：

Chang, Chia-Ming ^{[1
]}

Lin, Chi-Ming ^{[1
]}

Hsieh, Chih-Chun ^{[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 | 2009年 / 117卷 / 01期

关键词：

Carbide; Welding; Microstructure; Hardness; HARDFACING ALLOYS; WEAR BEHAVIOR; RESISTANCE; STABILITY; CARBIDES; STEEL;

D O I：

10.1016/j.matchemphys.2009.05.052

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hypereutectic Fe-Cr-C claddings with different C contents were deposited on ASTM A36 steel substrates by flux cored arc welding (FCAW) to investigate that the effect of C content on microstructural characteristics. The results showed that the microstructure of hypereutectic Fe-Cr-C claddings consisted of primary proeutectic (Cr,Fe)(7)C-3 and the austenite plus (Cr,Fe)(7)C-3 eutectic. Proeutectic carbides undergone to several microstructural changes in response to higher carbon content in the cladding. The morphologies of proeutectic (Cr,Fe)(7)C-3 carbides changed from blade-like to rod-like with hexagonal cross section. The amounts of proeutectic (Cr,Fe)(7)C-3 carbides increased with increase of the C contents. The nucleation sites of proeutectic (Cr,Fe)(7)C-3 carbides increased under high undercooling condition. Hence, the latent heat of solidification can be released by formed proeutectic (CrFe)(7)C-3 carbides and then the growth of proeutectic (CrFe)(7)C-3 carbides were suppressed. Consequently, it showed a maximum hardness value (about HRC 62) when the amount of proeutectic (Cr,Fe)(7)C-3 carbides exceeded 86%. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：257 / 261

页数：5

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