基于30CrMnSiNi2A钢的飞机起落架激光熔覆再制造工艺

doi:10.13251/j.issn.0254-6051.2021.06.010

金属热处理 ›› 2021, Vol. 46 ›› Issue (6): 45-52.DOI: 10.13251/j.issn.0254-6051.2021.06.010

基于30CrMnSiNi2A钢的飞机起落架激光熔覆再制造工艺

陈滋鑫, 周后明, 徐采星, 达丽梅, 朱宇旭, 何方佳, 王泽达

湘潭大学机械工程学院, 湖南湘潭 411105

收稿日期:2021-01-11 出版日期:2021-06-25 发布日期:2021-07-21
通讯作者: 周后明,教授,博士,E-mail: zhouhouming@xtu.edu.cn
作者简介:陈滋鑫(1994—),男,硕士研究生,主要研究方向为激光表面改性,E-mail:1436524042@qq.com。
基金资助:
湖南省自然科学基金(2020JJ4585);国家自然科学基金(51775469);长株潭标志性工程计划重大标志性创新示范工程项目(2019XK2303);湘潭市科技计划项目(ZD-ZD20191007)

Laser cladding remanufacturing process of aircraft landing gear based on 30CrMnSiNi2A steel

Chen Zixin, Zhou Houming, Xu Caixing, Da Limei, Zhu Yuxu, He Fangjia, Wang Zeda

School of Mechanical Engineering, Xiangtan University, Xiangtan Hunan 411105, China

Received:2021-01-11 Online:2021-06-25 Published:2021-07-21

摘要/Abstract

摘要： 利用激光熔覆技术在30CrMnSiNi2A钢表面制备20%WC-Ni复合涂层,研究了激光熔覆工艺参数(激光功率P、离焦量L、扫描速度V)对涂层组织性能的影响,利用正交试验对激光熔覆工艺进行了优化。结果表明:工艺参数对覆层显微硬度影响大小依次为:P>L>V;优化工艺参数组合为P=1800 W、L=－20 mm、V=5 mm/s。工艺参数优化后制备的涂层组织致密,与基体结合良好,其硬度达542 HV0.2;干摩擦条件下,涂层的磨损量仅为基体材料的25.92%;电化学腐蚀速率为0.0025 mm/a,该速率仅为基体材料的1.37%;在1000 h的盐雾条件下,其表面能保持较好的性能。

关键词: 激光熔覆, 20%WC-Ni涂层, 几何形貌, 微观组织, 显微硬度, 耐磨性, 耐腐蚀性

Abstract: 20%WC-Ni composite coating was prepared on the surface of 30CrMnSiNi2A steel. The effects of laser cladding process parameters (laser power P, defocusing amount L, scanning speed V) on the microstructure and properties of the coating were studied by means of laser cladding technology with orthogonal experiment. The results show that the influence of process parameters on the microhardness of the coating is in the order of P>L>V. The orthogonally optimized process parameters are P=1800 W, L=-20 mm, V=5 mm/s, the coating prepared by using these parameters has compact microstructure and good bonding with the substrate, and its hardness reaches 542 HV0.2. The mass loss of this coating is only 25.92% of that of the matrix material under dry friction condition; the electrochemical corrosion rate is 0.0025 mm/a, which is only 1.37% of that of the matrix material; the surface of the coating maintains good performance under 1000 h salt spray condition.

Key words: laser cladding, 20%WC-Ni coating, geometrical appearance, microstructure, microhardness, wear resistance, corrosion resistance

中图分类号:

TG665

陈滋鑫, 周后明, 徐采星, 达丽梅, 朱宇旭, 何方佳, 王泽达. 基于30CrMnSiNi2A钢的飞机起落架激光熔覆再制造工艺[J]. 金属热处理, 2021, 46(6): 45-52.

Chen Zixin, Zhou Houming, Xu Caixing, Da Limei, Zhu Yuxu, He Fangjia, Wang Zeda. Laser cladding remanufacturing process of aircraft landing gear based on 30CrMnSiNi2A steel[J]. Heat Treatment of Metals, 2021, 46(6): 45-52.

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基于30CrMnSiNi2A钢的飞机起落架激光熔覆再制造工艺

Laser cladding remanufacturing process of aircraft landing gear based on 30CrMnSiNi2A steel

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