杨诗婷,邢永明,姜爱峰,郎风超,李继军.表面纳米化对316L 不锈钢干摩擦性能的影响[J].表面技术,2016,45(10):70-76.
YANG Shi-ting,XING Yong-ming,Jiang Ai-feng,LANG Feng-chao,LI Ji-jun.Effects of Surface Nanocrystallization on Dry Friction Properties of 316L Stainless Steel[J].Surface Technology,2016,45(10):70-76 |
| 表面纳米化对316L 不锈钢干摩擦性能的影响 |
| Effects of Surface Nanocrystallization on Dry Friction Properties of 316L Stainless Steel |
| 投稿时间：2016-03-26 修订日期：2016-10-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2016.10.011 |
| 中文关键词: 表面纳米化 316L 不锈钢 干摩擦 粗糙度 摩擦系数 磨损机理 |
| 英文关键词:surface nanocrystallization 316L stainless steel dry friction roughness friction coefficient wear mechanism |
| 基金项目:教育部高等学校博士学科点专项科研基金项目（20121514130001）；国家自然科学基金项目（11562016）；内蒙古自然科学基金（2013MS0107）；内蒙古工业大学校基金（x201415） |
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| Author | Institution |
| YANG Shi-ting | School of Science, Inner Mongolia University of Technology, Hohhot 010051, China |
| XING Yong-ming | School of Science, Inner Mongolia University of Technology, Hohhot 010051, China |
| Jiang Ai-feng | School of Science, Inner Mongolia University of Technology, Hohhot 010051, China |
| LANG Feng-chao | School of Science, Inner Mongolia University of Technology, Hohhot 010051, China |
| LI Ji-jun | School of Science, Inner Mongolia University of Technology, Hohhot 010051, China |
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| 中文摘要: |
| 目的 研究表面纳米化316L 不锈钢干摩擦磨损性能，以获得合理的喷丸时间，提高316L 不锈钢的使用寿命。方法 采用普通喷丸强化方法对316L 不锈钢进行表面纳米化处理，利用洛氏硬度计测量了纳米化前后材料表面洛氏硬度；利用激光共聚焦显微镜观察了纳米化前后材料表面三维形貌，测量了材料表面的粗糙度；利用扫描电子显微镜观察了表面纳米化处理后横截面的金相组织；利用材料表面性能综合测试仪在干摩擦条件下进行了摩擦磨损实验，测量了材料的摩擦系数；利用扫描电子显微镜观察了磨痕表面形貌，分析了材料的磨损机理。结果 与未纳米化试样相比，喷丸时间为15 min时，表面硬度提高9.7%，而表面粗糙度降低17.6%，干摩擦系数降低17.3%；喷丸时间为30 min 时，表面硬度提高34.1%，粗糙度降低35.1%，干摩擦系数降低28.8%。未纳米化试样呈现典型的粘着磨损和磨粒磨损机制，而纳米化处理后试样则主要呈现疲劳磨损和磨粒磨损机制。结论 表面纳米化处理后试样表面硬度随处理时间的增加而增加，粗糙度随处理时间的增加而降低，干摩擦系数随处理时间的增加而减小。喷丸处理时间较短时以疲劳磨损为主，处理时间较长时以磨粒磨损为主。 |
| 英文摘要: |
| The work aims to obtain a reasonable shot blasting time and improve the service life of 316L stainless steel by studying dry friction and wear properties of 316L stainless steel subject to surface nanocrystallization. Normal shot peening method was used to apply surface nanocrystallization treatment to 316L stainless steel. The surface Rockwell hardness for nanocrystallized and un-nanocrystallized samples was measured by Rockwell hardness meter. Three-dimensional morphology of nanocrystallized and un-nanocrystallized samples was observed by laser confocal microscope. The surface roughness was also measured. The cross-sectional metallographic structure of samples after nanocrystallization was observed by scanning electron microscope. Friction coefficient of the material was measured by taking advantage of friction and wear experiment with a surface performance general-purpose tester under dry friction conditions. The grinding surface morphology was observed by scanning electron microscope and wear mechanism of the material was discussed as well. Compared with un-nanocrystallized samples, after shot blasting for 15 min, surface hardness of nanocrystallized samples increased by 9.7%, surface roughness reduced by 17.6% and dry friction coefficient reduced by 17.3%. After shot peening for 30 min, the surface hardness increased by 34.1%, surface roughness reduced by 35.1% and dry friction coefficient reduced by 28.8%. Un-nanocrystallized samples mainly showed fatigue wear and abrasive wear mechanism. In conclusion, the sample surface hardness after surface nanocrystallization increases with the increase of treatment time while both roughness and dry friction coefficient decrease with the increase of treatment time. The wear mechanism in a short shot peening is mainly fatigue wear, and that in a long shot peening is mainly abrasive wear. |
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