扫描速度对高速激光熔覆316L不锈钢涂层组织与性能的影响

doi:10.13251/j.issn.0254-6051.2023.08.040

金属热处理 ›› 2023, Vol. 48 ›› Issue (8): 248-253.DOI: 10.13251/j.issn.0254-6051.2023.08.040

扫描速度对高速激光熔覆316L不锈钢涂层组织与性能的影响

何炜¹, 王燕燕¹, 舒林森^1,2

1.陕西理工大学机械工程学院, 陕西汉中 723000;
2.陕西省工业自动化重点实验室, 陕西汉中 723000

收稿日期:2023-03-12 修回日期:2023-06-20 出版日期:2023-08-25 发布日期:2023-10-10
通讯作者: 王燕燕,副教授,博士,E-mail: wangyanyanustb@163.com
作者简介:何炜(1998—),男,硕士研究生,主要研究方向为金属材料表面改性和激光材料加工,E-mail: 377597664@qq.com。
基金资助:
国家自然科学基金(51505268);陕西省教育厅专项科研计划(21JK0562);陕西省工业自动化重点实验室开放课题研究基金(SLGPT2019KF01-16);国防科技重点实验室基金(JCKY61420052022)

Effect of scanning speed on microstructure and properties of 316L stainless steel coatings by high-speed laser cladding

He Wei¹, Wang Yanyan¹, Shu Linsen^1,2

1. School of Mechanical Engineering, Shaanxi University of Technology, Hanzhong Shaanxi 723000, China;
2. Shaanxi Key Laboratory of Industrial Automation, Hanzhong Shaanxi 723000, China

Received:2023-03-12 Revised:2023-06-20 Online:2023-08-25 Published:2023-10-10

摘要/Abstract

摘要： 采用高速激光熔覆技术在27SiMn钢基体上制备了316L不锈钢涂层,对熔覆层的表面形貌、显微组织、显微硬度和摩擦磨损性能进行测试分析。研究了扫描速度对高速激光熔覆层的显微组织及性能的影响。结果表明,当扫描速度为75 mm/s时,涂层的宏观质量和冶金结合效果最好;涂层组织均匀,结合部以胞状晶为主,中上部以柱状晶和无次级晶臂的等轴枝晶为主,随着扫描速度的增大,晶粒明显细化;当扫描速度为105 mm/s时,较于45 mm/s的涂层,显微硬度由210.4 HV0.5提升至391.5 HV0.5,硬度提升了1.87倍;涂层的摩擦因数为0.521,磨损量为2 mg。因此,扫描速度的提高能够显著改善涂层的宏观性能,高扫描速度下的细晶强化,提高了涂层的显微硬度和耐磨损性能。

关键词: 高速激光熔覆, 摩擦磨损, 显微组织, 显微硬度

Abstract: 316L stainless steel coating was prepared on 27SiMn steel substrate by high-speed laser cladding technology, the surface morphology, microstructure, microhardness and friction and wear properties of the clad coating were tested and analyzed. The effect of scanning speed on microstructure and properties of high-speed laser clad coating was studied. The results show that, when the scanning speed is 75 mm/s, the coating quality and metallurgical combination effect is the best. The coating microstructure is uniform, the joint is dominated by cellular crystals, and the middle and upper part is dominated by columnar crystals and equiaxed dendrites without secondary crystal arms, with the increase of scanning speed, the grain is obviously refined. When the scanning speed is 105 mm/s, compared with the coating at scanning speed of 45 mm/s, the microhardness increases from 210.4 HV0.5 to 391.5 HV0.5, which increases by 1.87 times. The friction coefficient of the coating is 0.521, and the wear loss is 2 mg. Therefore, the macroscopic properties of the coating can be significantly improved with the increase of scanning speed, and the microhardness and wear resistance of the coating can be improved by the fine grain strengthening at high scanning speed.

Key words: high-speed laser cladding, friction and wear, microstructure, microhardness

中图分类号:

TG174.44

何炜, 王燕燕, 舒林森. 扫描速度对高速激光熔覆316L不锈钢涂层组织与性能的影响[J]. 金属热处理, 2023, 48(8): 248-253.

He Wei, Wang Yanyan, Shu Linsen. Effect of scanning speed on microstructure and properties of 316L stainless steel coatings by high-speed laser cladding[J]. Heat Treatment of Metals, 2023, 48(8): 248-253.

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扫描速度对高速激光熔覆316L不锈钢涂层组织与性能的影响

Effect of scanning speed on microstructure and properties of 316L stainless steel coatings by high-speed laser cladding

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