Study on the Microstructure and Wear Resistance of the High-Speed Laser-Cladded Coating on the Cutterhead of Mining Machine

GUO Shirui, DING Shouwen, CUI Lujun, CHEN Shuisheng, DU Quanbin, GUO Chuan, XUE Xiaoqiang

doi:10.16577/j.issn.1001-1560.2025.0082

2025 , Vol. 58 >Issue 5: 105 - 112

DOI: https://doi.org/10.16577/j.issn.1001-1560.2025.0082

Study on the Microstructure and Wear Resistance of the High-Speed Laser-Cladded Coating on the Cutterhead of Mining Machine

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(1.School of Intelligent Mechatronics Engineering， Zhongyuan University of Technology， Zhengzhou 450007， China；2.Collaborative Innovation Center of High-End Laser Manufacturing Equipment， Zhejiang University of Technology， Hangzhou 310014， China；3.Hubei Key Laboratory of Digital Textile Equipment， Wuhan Textile University， Wuhan 430200， China；4.School of Mechanical and Power Engineering， Henan Polytechnic University， Jiaozuo 454000， China；5.Henan Key Laboratory of Intelligent Manufacturing Equipment Integration for Superhard Materials，Henan Mechanical ＆ Electrical Vocational College， Zhengzhou 451192， China；6.Linzhou Heavy Machinery Group Co.， Ltd.， Anyang 456550， China； 7.Shaanxi Xiaobaodang Mining Co.， Ltd.， Yulin 719302， China)

GUO Shirui(1986－)， Associate Professor， Master’s Supervisor， Research Focus: Laser Surface Modification，E-mail: laser＠zut.edu.cn

Received date: 2024-12-25

Revised date: 2025-02-09

Accepted date: 2025-02-10

Online published: 2025-06-10

Supported by

Open Foundation of the Collaborative Innovation Center of High-End Laser Manufacturing Equipment(JGKF-202501)； Key Scientific Research Project of Colleges and Universities in Henan Province (24A460029； 24A460008)； Open Project of Hubei Key Laboratory of Digital Textile Equipment (Wuhan Textile University) (KDTL2023003)； Key Research and Development and Promotion Projects in Henan Province (242102220064； 242102221033； 242102231026)； Open Project of Henan Key Laboratory of Intelligent Manufacturing Equipment Integration for Superhard Materials (JDKJ2024-03)；Postgraduate Education Reform and Quality Improvement Project of Henan Province (YJS2025XQLH24；YJS2025AL60)； Henan Province Key R＆D Special Project(241111220100)； Basic Research Special Project of Henan Province Higher Education Institutions Key Scientific Research Project Programme (24ZX004)； 2023 University Major Key Project Achievement Cultivation Plan Project(K2023ZDPY01)

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Abstract

To improve the microstructure of the alloy coating and enhance the mechanical properties of the cutter head in coal mining machines，Fe-based alloy cladding layers (S1 and S2) were fabricated on mining cutter head surfaces at two scanning speeds of 0.5 m/min and 12 m/min.The metallographic microstructure， mechanical properties and tribological performance of coatings were systematically characterized by scanning electron microscopy (SEM)， Vickers hardness tester， and X-ray diffraction (XRD).Results showed both coatings exhibited dense microstructures without defects such as pores or cracks.The top layer of both laser-clad coatings consisted of equiaxed crystals， the middle layer was composed of columnar crystals， and the bottom layer consisted of planar crystals.Moreover， the overall microstructure of the S2 coating was finer than that of S1， and the overlay layers were primarily composed of an α-Fe solid solution， Cr2B and FeNi.The γ-Fe phase precipitated in S1， while the diffraction angle of the α-Fe phase in S2 shifted to a lower angle than that of S1.Both coatings had higher microhardness than the substrate，with the S2 coating showing the highest microhardness of 651 HV0.5.The strengthening mechanisms of the coating mainly included grain refinement strengthening and solid solution strengthening.Besides， S2 demonstrated the best tribological performance， and the wear rate of the substrate was 7.3 times that of S2.The wear mechanism of the substrate was adhesive wear， whereas that of the coatings was primarily abrasive wear.

Key words： high-speed laser cladding; Fe-based alloys; microstructure; scanning speed; friction and wear

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GUO Shirui, DING Shouwen, CUI Lujun, CHEN Shuisheng, DU Quanbin, GUO Chuan, XUE Xiaoqiang . Study on the Microstructure and Wear Resistance of the High-Speed Laser-Cladded Coating on the Cutterhead of Mining Machine[J]. Materials Protection, 2025 , 58(5) : 105 -112 . DOI: 10.16577/j.issn.1001-1560.2025.0082

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