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

XUE Xiang, LI Yong, WANG Xiao'en, LIU Gang, XIE Weiwei, WANG Mingyuan

doi:10.16577/j.issn.1001-1560.2025.0027

Materials Protection >

2025 , Vol. 58 >Issue 2: 92 - 100

DOI: https://doi.org/10.16577/j.issn.1001-1560.2025.0027

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

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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.

Key words： steam turbine blade; water-erosion; laser cladding; preheating temperature; mechanical properties

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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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