基体预热温度对激光熔覆抗水蚀涂层性能的影响

薛翔, 李勇, 王孝恩, 刘刚, 谢威威, 王明远

doi:10.16577/j.issn.1001-1560.2025.0027

材料保护 >

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

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

研究论文

基体预热温度对激光熔覆抗水蚀涂层性能的影响

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¹海南核电公司； ²西安热工研究院有限公司

王明远(1998-)，硕士，助理工程师，主要研究方向为表面工程，电话:13186166618， E-mail:1256808517＠qq.com

收稿日期: 2024-08-12

修回日期: 2024-10-14

录用日期: 2024-10-20

网络出版日期: 2025-03-21

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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

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摘要

为进一步提高激光熔覆涂层的抗水蚀性能，采用自研改进高速钢合金粉末(X2)在17-4PH 钢表面通过激光熔覆技术沉积覆层，利用显微硬度计、光学显微镜、水蚀试验台等仪器研究了基体预热温度对激光熔覆X2覆层力学性能、组织形貌与抗水蚀性能的影响。结果表明:制备的熔覆层组织均较为均匀致密，预热温度为150 ～200 ℃时熔覆层的平均显微硬度相比100～150 ℃时提升了21.6 HV0.2，适当地提升基体预热温度可以有效提升熔覆层的显微硬度，经80 h 水蚀试验后，基体预热温度为150～200 ℃时的激光熔覆层的失重仅为未预热激光熔覆覆层的50%，其水蚀坑最大深度仅为未预热激光熔覆覆层的1/10，抗水蚀性能显著提升。

关键词： 汽轮机叶片; 水蚀; 激光熔覆; 预热温度; 力学性能

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薛翔, 李勇, 王孝恩, 刘刚, 谢威威, 王明远 . 基体预热温度对激光熔覆抗水蚀涂层性能的影响[J]. 材料保护, 2025 , 58(2) : 92 -100 . DOI: 10.16577/j.issn.1001-1560.2025.0027

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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