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Effect of Preheating Temperature of Substrate on the Water-Erosion Resistance of Laser-Cladded Coatings

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  • (1.Hainan Nuclear Power Co., Ltd., Haikou 572700, China;2.Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710054, China)
WANG Mingyuan (1998 -), Master, Assistant Engineer, Research Focus: Surface Engineering, Tel.:13186166618, E-mail: 1256808517@qq.com

Received date: 2024-08-12

  Revised date: 2024-10-14

  Accepted date: 2024-10-20

  Online published: 2025-03-21

Abstract

For further enhancing the water-erosion resistance of laser-cladded coatings, a self-developed improved high-speed steel alloy powder (X2) was employed to deposit a coating on the surface of 17-4PH steel through laser cladding technology.Instruments such as a microhardness tester, an optical microscope, and a water-erosion test rig were utilized to investigate the influence of the substrate preheating temperature on the mechanical properties, microstructure, and water-erosion resistance of the laser-cladded X2 coating.Results indicated that the microstructure of the prepared cladding layers was relatively uniform and dense.When the preheating temperature ranged from 150 ~200℃, the average microhardness of the cladding layer increased by 21.6 HV0.2 compared to that when the temperature ranged from 100~150 ℃.Moreover, appropriately increasing the substrate preheating temperature could effectively improve the microhardness of the cladding layer.After water-erosion test for 80 h, the weight loss of the laser-cladded layer with the substrate preheating temperature of 150~200 ℃was only 50%of that of the laser-cladded layer without preheating treatment.The maximum depth of the water-erosion pits was only 1/10 of that of the nonpreheated laser-cladded layer, and the water-erosion resistance was significantly enhanced.

Cite this article

XUE Xiang, LI Yong, WANG Xiao'en, LIU Gang, XIE Weiwei, WANG Mingyuan . Effect of Preheating Temperature of Substrate on the Water-Erosion Resistance of Laser-Cladded Coatings[J]. Materials Protection, 2025 , 58(2) : 92 -100 . DOI: 10.16577/j.issn.1001-1560.2025.0027

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