Microstructure， Wear and Corrosion Resistance Properties of Nickel-Coated WC Enhanced Iron-Based Alloy Coatings on Surface of Cr30 steel

TANG Liansheng, LIAN Yinghua, LIN Xing, GUO Yan

doi:10.16577/j.issn.1001-1560.2024.0180

2024 , Vol. 57 >Issue 8: 80 - 87

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0180

Microstructure， Wear and Corrosion Resistance Properties of Nickel-Coated WC Enhanced Iron-Based Alloy Coatings on Surface of Cr30 steel

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(1.Fujian Huadian Kemen Power Generation Co.， Ltd.， Lianjiang 350512， China；2.Huadian Electric Power Research Institute Co.， Ltd.， Hangzhou 310030， China)

GUO Yan(1977-)，Senior Engineer，Research Focus:Development and Application of Metal Material Surface Protection Technology， E-mail: gy197704＠163.com

Received date: 2024-03-04

Revised date: 2024-04-24

Accepted date: 2024-04-26

Online published: 2024-09-23

Supported by

Science and Technology Project of China Huadian Group Co.， Ltd(CHDKJ22-02-103)

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Abstract

In order to improve the erosion and wear resistance of Cr30 steel surface and its corrosion resistance to sulfuric acid and hydrochloric acid， a nickel-coated WC iron-based alloy coating was prepared on the surface of Cr30 steel by laser cladding technology with using a mixture of ferroalloy powder and nickel-coated WC particles as raw materials.The effects of the mass fraction of nickel-coated WC (10%～30%) in the raw material on the microstructure， phase composition， microhardness， erosion and wear resistance， and sulfuric acid and hydrochloric acid corrosion resistance of the iron-based alloy coating were studied.Results showed that the phases of the iron-based alloy coating without nickelcoated WC were FeCr solid solution and Cr23C6， while the phases of the iron-based alloy coating containing 10%and 20%nickel-coated WC were FeCr solid solution， Cr23C6 and Fe3W3C.As the content of nickel-coated WC increased to 30%， new carbides Fe6W6C were precipitated in the iron-based alloy coating， and the phases of the iron-based alloy coating containing 30%nickel-coated WC were FeCr solid solution，Cr23C6， Fe3W3C and Fe6W6C.Meanwhile， with the increase of the content of nickel coated WC， the microhardness， erosion wear resistance and sulfuric acid and hydrochloric acid corrosion resistance of iron-based alloy coating were improved.When the mass fraction of nickel coated WC was 30%， the microstructure of the iron-based alloy coating was dense and the refinement effect was most obvious， and the hardness of the coating was the highest， reaching 786 HV0.5.In general， the iron-based alloy coating with 30%nickel-clad WC possessed the best resistance to erosion wear， sulfuric acid and hydrochloric acid corrosion.

Key words： laser cladding; nickel coated WC; iron-based alloy coating; erosion wear; corrosion in acidic media

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TANG Liansheng, LIAN Yinghua, LIN Xing, GUO Yan . Microstructure， Wear and Corrosion Resistance Properties of Nickel-Coated WC Enhanced Iron-Based Alloy Coatings on Surface of Cr30 steel[J]. Materials Protection, 2024 , 57(8) : 80 -87 . DOI: 10.16577/j.issn.1001-1560.2024.0180

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