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Journal of Engineering
Volume 2016, Article ID 8487976, 5 pages
http://dx.doi.org/10.1155/2016/8487976
Research Article

Composition Design and Fatigue Curves of Hardfacing Materials for Cold Roll

1School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300132, China
2Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Tianjin 300132, China

Received 30 November 2015; Revised 4 February 2016; Accepted 7 February 2016

Academic Editor: Sheng-Rui Jian

Copyright © 2016 C. L. Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In order to improve the fatigue life of cold rolls, a series of hardfacing alloys were designed by orthogonal experiments considering the interaction between carbon, chromium, and niobium. Hardfacing layers were produced by Tungsten Inert Gas (TIG) arc welding. The effects of alloy content on microstructure and carbides and fatigue behavior at different load frequency and different temperature were analyzed. The results show that suitable combination of 0.5% C, 4.0% Cr, and 2.0% Nb can obtain a high hardness of 54.7 HRC for the formation of fine lath martensite and carbides with dispersed distribution. The new designed hardfacing materials have similar curves with parent material in low load frequency and below 400°C.