Effect of ultrasonic nanocrystal treatment combined with nitriding process on fretting wear behavior of textured 20CrMoH steel

被引：6

作者：

Wang, Jintao ^{[1
]}

Qu, Chenxi ^{[2
]}

Geng, Jianwei ^{[3
]}

Li, Xiaoqiang ^{[1
]}

Qu, Shengguan ^{[1
]}

机构：

[1] South China Univ Technol, Sch Mech & Automot Engn, Guangdong Key Lab Adv Met Mat Proc, Guangzhou 510640, Peoples R China

[2] Univ Manchester, Sch Mech Aerosp & Civil Engn, Manchester M13 9PL, England

[3] Zhuhai Feima Transmiss Machinery Co Ltd, Zhuhai 519600, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2023年 / 457卷

关键词：

20CrMoH steel; Texture; Nitriding; Surface nanocrystallization; Fretting wear; LASER-MICROTEXTURED-SURFACES; TRIBOLOGICAL BEHAVIOR; FATIGUE-STRENGTH; RESIDUAL-STRESS; STAINLESS-STEEL; LUBRICATION; MICROSTRUCTURE; FRICTION; ALLOY; TRANSITION;

D O I：

10.1016/j.surfcoat.2023.129263

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Individual and synergy effects of laser surface texturing (LST) followed by plasma nitriding (PN) and surface ultrasonic nanocrystal technology (SUNT) on fretting wear behaviors of 20CrMoH steel were systematically investigated at various loads and lubrication conditions. Results indicated that the combined treated (LST + PN + SUNT) 20CrMoH steel got the lowest surface roughness Ra value of 0.46 mu m, the highest surface microhardness of 940 HV0.2, and the maximum residual compressive stress (RCS) value of-750 MPa. Consequently, the best fretting wear resistance was obtained by the combined treated 20CrMoH steel. Wear loss of untreated specimen reduced by 131 % after the combined treatment. The predominant wear mechanisms of the untreated, PN treated and LST + PN treated 20CrMoH steel under dry friction were oxidation wear and delamination. Besides, Oxidation and adhesion occurred for the combined treated specimen in dry friction. Especially, texture, residual stress and microhardness are key factors enhancing the anti-wear resistance.

引用

页数：13

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