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Effect of Cr addition on the microstructure and abrasive wear resistance of WC-reinforced iron matrix surface composites

Published online by Cambridge University Press:  10 March 2014

Zulai Li
Affiliation:
School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Yehua Jiang
Affiliation:
School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Rong Zhou
Affiliation:
School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Zhihui Chen
Affiliation:
School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Quan Shan
Affiliation:
School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Jun Tan*
Affiliation:
School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
*
a)Address all correspondence to this author. e-mail: tanjuncn@gmail.com
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Abstract

Tungsten carbide (WC) particle–reinforced iron matrix surface composites with different content of Cr were fabricated using vacuum evaporative pattern casting technique. It was found that the morphology of carbides changed from continuous net-shape to isolated block-shape patterns. The amount of carbides increase with the increasing Cr content in the matrices. Composites with different Cr content show better abrasive wear resistance than those without Cr. With the increase of Cr content in the matrices, the three-body abrasive wear resistance of the composites increased, while the impact abrasive wear resistance of the composites increased under 1 J impact load, but first increased and then decreased under 3 J impact load. The influences of the addition of Cr in the matrices on the abrasive wear resistance were the synergistic effects of two protecting effects and two supporting effects. The results might provide significant references for the design and practical application of WC particle–reinforced iron matrix surface composites.

Type
Articles
Copyright
Copyright © Materials Research Society 2014 

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