Microstructure and properties of Fe-Cr-C-B-W alloy by self-shielded flux-cored wire open-arc surfacing

JIA Hua; LIU Zhengjun; LI Meng; ZONG Lin

doi:10.12073/j.hjxb.20190506002

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2020 > 41(3): 86-90. > DOI: 10.12073/j.hjxb.20190506002

JIA Hua, LIU Zhengjun, LI Meng, ZONG Lin. Microstructure and properties of Fe-Cr-C-B-W alloy by self-shielded flux-cored wire open-arc surfacing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(3): 86-90. DOI: 10.12073/j.hjxb.20190506002

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Microstructure and properties of Fe-Cr-C-B-W alloy by self-shielded flux-cored wire open-arc surfacing

JIA Hua^{1, 2,},
LIU Zhengjun^2, ,,
LI Meng¹,
ZONG Lin³

1.
Applied Technology College of Dalian Ocean University, Dalian, 116300, China
2.
Shenyang University of Technology, Shenyang, 110870, China
3.
Shenyang University of Chemical Technology, Shenyang, 110142, China

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Received Date: May 05, 2019
Available Online: July 12, 2020

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Abstract

Abstract

Five Fe-Cr-C-B-W alloy samples with different W contents were prepared by self-shielded flux cored wire arc surfacing technology. Microstructure and properties of surfacing alloys were analyzed by metallographic microscope, scanning electron microscope, X-ray diffractometer, Rockwell hardness tester and wear tester. The results show that the microstructure of the surfacing alloy consists of martensite, retained austenite, M₇(C,B)₃, M₃(C,B), Fe₃W₃C and WC. Most of W is migrated to the grain boundary to produce Fe₃W₃C C deficiency composite phase which is more stable than the WC. There are no typical primary WC hard phase particles in the surfacing layer. With the increase of W content, the eutectic hard phase M₇(C,B)₃, M₃(C,B) and Fe₃W₃C increase, and the spacing decreases. And they are continuous and evenly distributed. When the addition amount of W is 12%, the wear resistance of the surfacing layer is the best.
- self-shielded flux cored wire,
- arc surfacing,
- Fe-Cr-C-B-W alloy,
- microstructure and properties

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