王敬,梁强.表面形貌对冷作模具钢摩擦磨损性能的影响[J].表面技术,2019,48(10):206-213.
WANG Jing,LIANG Qiang.Influence of Surface Topography on Friction and Wear Properties of Cold Die Steel[J].Surface Technology,2019,48(10):206-213 |
| 表面形貌对冷作模具钢摩擦磨损性能的影响 |
| Influence of Surface Topography on Friction and Wear Properties of Cold Die Steel |
| 投稿时间：2018-12-29 修订日期：2019-10-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.10.025 |
| 中文关键词: 冷作模具钢 表面形貌 腐蚀坑 摩擦系数 磨损性能 |
| 英文关键词:surface topography corrosion pit friction coefficient abrasion resistance |
| 基金项目:重庆市基础科学与前沿技术研究专项基金资助项目（cstc2017jcyjAX0175）；重庆工商大学校级项目（950318062） |
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| 中文摘要: |
| 目的 为了研究表面形貌对冷作模具钢表面摩擦系数及磨损性能的影响。方法 用打磨和化学腐蚀法分别获得了光滑表面形貌和带有腐蚀坑的表面形貌，通过采用扫描电镜和激光共聚焦显微镜观察和测量表面形貌的分布和大小，研究了腐蚀时间对表面形貌的影响。通过对腐蚀前后的试样进行摩擦磨损试验，研究分析了表面形貌对冷作模具钢表面摩擦系数及磨损性能的影响。结果 试样NO.1、NO.3表面的腐蚀坑比NO.2、NO.4明显。试样NO.0的摩擦系数随着摩擦时间的增加不断增大，而试样NO.1、NO.2、NO.4的摩擦系数相对稳定，无明显增大趋势，摩擦系数最小的试样为NO.4，其摩擦系数相对NO.0降低了52.26%。试样NO.0的磨痕相对其他试样较规则，且磨痕上有鳞状物，而其他试样则没有，试样NO.0的磨痕两侧峰值较大，其他试样的磨痕曲线不是很明显。结论 采用浸泡腐蚀可以得到具有一定腐蚀坑的表面形貌，腐蚀坑的大小、深度与腐蚀时间有关，腐蚀坑的深度对摩擦系数有非常大的影响，腐蚀坑可以减少磨屑导致的二次磨损。合理的表面形貌可以有效地改善模具的磨损情况。 |
| 英文摘要: |
| The work aims to study the influence of different surface topography on surface friction coefficient and abrasion resistance of cold work die steel through the smooth surface topography and the surface topography with corrosion pits obtained by polishing and chemical corrosion. The distribution and size of surface topography were observed and measured by scanning electron microscopy and laser scanning confocal microscopy and the effect of corrosion time on surface morphology was also studied. The effect of surface morphology on surface friction coefficient and wear properties of cold-working die steel was studied by friction and wear tests of samples before and after corrosion. The corrosion pits on the surface of NO.1 and NO.3 were more obvious than those on NO.2 and NO.4. The friction coefficient of NO.0 increased with the increase of friction time, while the friction coefficients of NO.1, NO.2 and NO.4 were relatively stable and had no obvious increasing trend. NO.4 had the lowest friction coefficient, which was 52.26% lower than that of NO.0. Compared with other samples, the wear marks of NO.0 were more regular, and there were scales on the wear marks, while the other samples did not. The peak values on both sides of the wear marks of NO.0 were larger, and the wear marks of other samples were not very obvious. The surface topography with certain corrosion pits can be obtained by immersion corrosion. The size and depth of corrosion pits are related to corrosion time and the depth of corrosion pit has great effect on friction coefficient. The corrosion pits can reduce the secondary wear resulted by abrasive dust. The reasonable surface topography can effectively improve the wear condition of die. |
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