1.郑州大学 力学与安全工程学院,郑州 450001
2.南阳理工学院 河南省冲击与工程结构灾害动力学国际联合实验室,南阳 473004
3.郑州大学 机械与动力工程学院,郑州 450001
彭腾,男,1999年生,河南商丘人,在读硕士研究生;主要研究方向为抗疲劳制造;E-mail:pt2081704665@163.com。
张建伟,男,1989年生,河南中牟人,博士,副教授,博士研究生导师;主要研究方向为抗疲劳制造和高分子材料力学性能;E-mail:zhangjianwei@zzu.edu.cn。
收稿:2024-11-15,
修回:2024-12-17,
纸质出版:2026-02-15
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彭腾,张建伟,李传航,等. 基于重复划痕试验的18CrNiMo7-6合金钢表面变质层硬度和磨损行为研究[J]. 机械强度,2026,48(2):144-150.
PENG Teng,ZHANG Jianwei,LI Chuanhang,et al. Study on hardness and wear behavior of surface modification layer of 18CrNiMo7⁃6 alloy steel based on repeated scratch test[J]. Journal of Mechanical Strength,2026,48(2):144-150.
彭腾,张建伟,李传航,等. 基于重复划痕试验的18CrNiMo7-6合金钢表面变质层硬度和磨损行为研究[J]. 机械强度,2026,48(2):144-150. DOI: 10.16579/j.issn.1001.9669.2026.02.017.
PENG Teng,ZHANG Jianwei,LI Chuanhang,et al. Study on hardness and wear behavior of surface modification layer of 18CrNiMo7⁃6 alloy steel based on repeated scratch test[J]. Journal of Mechanical Strength,2026,48(2):144-150. DOI: 10.16579/j.issn.1001.9669.2026.02.017.
目的
2
研究18CrNiMo7-6合金钢及其渗碳热处理后的表面变质层的硬度和抗磨损能力。
方法
2
采用维氏压头对18CrNiMo7-6合金钢基体和表面变质层进行不同法向载荷和划痕次数的重复划痕试验。使用光学显微镜,观察随划痕次数增加材料的损伤情况,通过三维形貌系统采集划痕形貌特征量(划痕宽度、残余深度、隆起高度),并计算了划痕硬度和磨损率。
结果
2
结果表明,18CrNiMo7-6合金钢基体的划痕宽度、残余深度、隆起高度以及磨损率均明显大于表面变质层,划痕硬度则明显小于表面变质层。经过渗碳热处理后的18CrNiMo7-6合金钢表面变质层的划痕硬度更高,磨损率更小,抗磨损能力得到了显著提升。研究结果可为表面变质层的构筑和性能演化的研究提供指导。
Objective
2
To investigate the hardness and wear resistance of 18CrNiMo7-6 alloy steel and its surface modification layer after carburizing heat treatment.
Methods
2
Repeated scratch tests were conducted using a Vickers indenter on both the 18CrNiMo7-6 alloy steel substrate and the surface modification layer with varying normal loads and number of scratch cycles. Material damage as the scratch cycles increased was observed using the optical microscope. Scratch morphological characteristics
including scratch width
residual depth
and pile-up height
were measured using a three-dimensional profilometry system. Additionally
scratch hardness and wear rate were analyzed.
Results
2
The results show that both the scratch width and residual depth of the 18CrNiMo7-6 alloy steel substrate and surface-modified layer increased linearly with the number of scratch cycles. Due to the work-hardening effect induced by repeated scratching
the pile-up height also increased with the number of scratch cycles
although the rate of increase gradually diminished. The scratch width
residual depth
pile-up height
and wear rate of the 18CrNiMo7-6 alloy steel substrate were significantly higher than those of the surface-modified layer
while the scratch hardness was notably lower than those of the surface-modified layer. These findings suggest that the carburized surface-modified layer of 18CrNiMo7-6 alloy steel exhibits superior scratch hardness
a reduced wear rate
and significantly enhanced wear resistance compared to the substrate. The results can provide guidance for research on the construction and performance evolution of surface modification layer.
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