Effect of Mo Content on Microstructure and Wear Resistance of Fe - Cr - B Surfacing Alloy

XIAN Lanqing, ZHUANG Minghui, CHEN Chao, MOU Liting, JING Rui, MA Zhen

doi:10.16577/j.issn.1001-1560.2022.0277

Materials Protection >

2022 , Vol. 55 >Issue 10: 64 - 68

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0277

Effect of Mo Content on Microstructure and Wear Resistance of Fe - Cr - B Surfacing Alloy

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(1.School of Materials Science and Engineering,Jiamusi University,Jiamusi 154007,China;2.School of Materials Science and Engineering,Shandong University,Jinan 250100,China)

Received date: 2022-04-24

Revised date: 2022-05-31

Accepted date: 2022-06-14

Online published: 2023-12-23

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Abstract

In order to study the role of alloying element Mo in the Fe-Cr-B wear-resistant surfacing alloy,plasma arc welding surfacing was used to prepare Fe-Cr-B wear-resistant surfacing alloy layer with different Mo contents on the surface of Q235 by adjusting the amount of molybdenum iron powder in the surfacing alloy powder.Scanning electron microscopy,XRD and other analysis and testing methods were used to study the effect of the change of Mo content on the microstructure and properties of Fe-Cr-B surfacing alloy.Results showed that when no molybdenum iron powder was added into the surfacing alloy,the surfacing alloy consisted of M2B and (Fe,Cr) phases.When the content of Mo in the surfacing alloy reached 2% (mass fraction),a new phase FeMo2B2 precipitated in the surfacing alloy.In such case,the surfacing alloy consisted of M2B,FeMo2B2 and (Fe,Cr) phases;and the Rockwell hardness of the surfacing alloy depended on the volume fractions of M2B,FeMo2B2 and (Fe,Cr).With the increase of Mo content,the Rockwell hardness and wear resistance of the surfacing alloy gradually increased.Compared with the surfacing alloy without Mo,the wear resistance of surfacing alloy with 8% (mass fraction) Mo was improved by 1.2 times.

Key words： plasma surfacing; Fe-Cr-B alloy; Mo Content; microstructure; properties

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XIAN Lanqing, ZHUANG Minghui, CHEN Chao, MOU Liting, JING Rui, MA Zhen . Effect of Mo Content on Microstructure and Wear Resistance of Fe - Cr - B Surfacing Alloy[J]. Materials Protection, 2022 , 55(10) : 64 -68 . DOI: 10.16577/j.issn.1001-1560.2022.0277

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