Page 14 - 《摩擦学学报》2020年第5期

第 40 卷 第 5 期 摩 擦 学 学 报 Vol 40 No 5
2020 年 9 月 Tribology Sept, 2020

DOI: 10.16078/j.tribology.2019266

横向交变载荷下TiCN/MoS 涂层螺栓的
2
防松性能研究

1
1
1
1
1
1
1,2*
胡华民 , 李 涛 , 张 挺 , 刘建华 , 蔡振兵 , 莫继良 , 彭金方 , 朱旻昊 1
(1. 西南交通大学牵引动力国家重点实验室 摩擦学研究所，四川 成都 610031;
2. 西南交通大学 材料科学与工程学院，四川 成都 610031)
摘 要: 基于自主设计的螺栓连接振动试验装置，系统研究了横向交变载荷下TiCN/MoS 2 涂层螺栓分别与
TiCN/MoS 2 涂层螺母和无涂层螺母配合时连接结构的松动行为，并利用体式显微镜(OM)、扫描电子显微镜(SEM)、
电子能谱仪(EDX)和白光干涉仪等微观分析设备对试验后的螺纹表面进行损伤分析，深入讨论其磨损机理. 结果表
明：在相同试验条件下，TiCN/MoS 2 涂层螺栓比无涂层螺栓螺纹表面的损伤轻微，连接结构的松动程度更低；与无涂
层螺栓螺纹根部相同等效应力状态下，TiCN/MoS 2 涂层螺栓连接结构的预紧力可提高约10%，螺纹表面的损伤减
轻，同时连接结构的松动程度进一步降低；TiCN/MoS 2 涂层螺栓螺纹表面的主要磨损机制为疲劳磨损.
关键词: 螺栓连接结构; TiCN/MoS 2 涂层; 微动磨损; 塑性变形; 松动程度
中图分类号: U213.5；V261.93 文献标志码: A 文章编号: 1004-0595(2020)05–0569–10

Anti-Loosening Performance of the TiCN/MoS Coated Bolts
2
under Transverse Alternating Load

1 1 1 1,2* 1
HU Huamin , LI Tao , ZHANG Ting , LIU Jianhua , CAI Zhenbing ,
1 1 1
MO Jiliang , PENG Jinfang , ZHU Minhao

(1. Tribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong University,
Sichuan Chengdu 610031, China
2. School of materials science and engineering, Southwest Jiaotong University, Sichuan Chengdu 610031, China)
Abstract: Based on the self-designed testing equipment for bolted joints, the self-loosening behaviour of the
TiCN/MoS 2 coated bolts, which were connected with the TiCN/MoS 2 coated nuts and the uncoated nuts respectively,
was systematically studied under transverse alternating load. After tests, the morphologies of the damaged threads were
analyzed using three-dimensional microscope, scanning electron microscope, energy dispersive X-ray and white light
interferometer. Furthermore, the wear mechanisms were investigated on the first thread surfaces. The results showed that
the thread damage of the TiCN/MoS 2 coated bolts was slighter than that of the uncoated bolts, and the self-loosening
degree of the TiCN/MoS 2 coated bolts was lower than that of the uncoated bolts under the same experimental
parameters. Moreover, under the same equivalent stress as that of the uncoated bolts at the thread root, the preload of the
TiCN/MoS 2 coated bolt can be improved by about 10%, the damage of the thread surface was further reduced, and the
self-loosening degree of bolted joints was also decreased. In addition, delamination was the main wear mechanism on
the first thread surface of the composite coated bolts.
Key words: bolted joints; TiCN/MoS 2 coating; fretting wear; plastic deformation; self-loosening degree

Received 31 December 2019, revised 5 February 2020, accepted 18 February 2020, available online 28 September 2020.
*Corresponding author. E-mail: jianhua-liu@swjtu.edu.cn, Tel: +86-28-87601282.
The project was supported by the National Natural Science Foundation of China (51705434), Sichuan Science and Technology
Program (2019YFG0290) and Open Fund of State Key Laboratory of Long-life High Temperature Materials (DTCC28EE190930).
国家自然科学基金项目(51705434)，四川省重点研发项目(2019YFG0290)和长寿命高温材料国家重点实验室开放课题
(DTCC28EE10930)资助.