刘黎明,张超.热处理温度对大气等离子喷涂 316L 不锈钢涂层组织和性能的影响[J].表面技术,2018,47(8):155-161.
LIU Li-ming,ZHANG Chao.Effect of Heat Treatment Temperature on Structure and Properties of Atmospheric Plasma Sprayed 316L Stainless Steel Coatings[J].Surface Technology,2018,47(8):155-161 |
| 热处理温度对大气等离子喷涂 316L 不锈钢涂层组织和性能的影响 |
| Effect of Heat Treatment Temperature on Structure and Properties of Atmospheric Plasma Sprayed 316L Stainless Steel Coatings |
| 投稿时间：2018-04-14 修订日期：2018-08-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2018.08.022 |
| 中文关键词: 大气等离子喷涂 316L 不锈钢涂层 热处理 显微结构 硬度 耐磨性 |
| 英文关键词:atmospheric plasma spray 316L stainless steel coating heat treatment microstructure hardness wear resistance |
| 基金项目:江苏省海洋科技创新专项（HY2017-10）；扬州大学江都高端装备工程技术研究院开放课题（2017-01）；扬州市杰出青年基金 （YZ2017096） |
| 作者 | 单位 |
| 刘黎明 | 扬州大学 机械工程学院，江苏 扬州 225127 |
| 张超 | 扬州大学 机械工程学院，江苏 扬州 225127 |
|
| Author | Institution |
| LIU Li-ming | School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China |
| ZHANG Chao | School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China |
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| 中文摘要: |
| 目的 研究 316L 不锈钢涂层在不同热处理温度下组织结构和性能的变化规律，提高该涂层的摩擦学性能。方法 利用大气等离子喷涂（APS）技术制备 316L 不锈钢涂层，对喷涂态涂层进行 300~700 ℃热处理。通过光学显微镜（OM）和 X 射线衍射仪（XRD）观察分析涂层的显微组织和相组成，利用维氏硬度计测试涂层的显微硬度值。采用摩擦磨损试验机和三维光学显微镜测试涂层的摩擦系数和磨损率，利用场发射扫描电子显微镜（FE-SEM）观察磨痕表面并对磨损机制进行深入分析。结果 喷涂态 316L 不锈钢涂层的厚度约为 350 m，显微硬度值为 335HV0.1，涂层组织中含有未熔颗粒、孔隙和氧化物等。在干摩擦条件下，涂层的摩擦系数稳定在 0.75 左右，磨损率为(1.329±0.14)×105 mm3/(N•m)。随着热处理温度的升高，涂层扁平颗粒界面处的氧化行为明显，同时涂层内部的孔隙缩小，涂层结构更加致密，使得涂层显微硬度提高了 30%。涂层的耐磨性能在 700 ℃热处理条件下最佳，磨损率为(1.149±0.26)×105 mm3/(N•m)，较喷涂态涂层降低 14%，磨损机制以疲劳磨损和粘着磨损为主。结论 热处理有助于提高 316L 不锈钢涂层的显微硬度，700 ℃热处理可有效提高涂层的耐磨性。 |
| 英文摘要: |
| The work aims to improve tribological performance of the 316L stainless steel coatings by investigating the evolutions of structures and properties of the coatings at different heat-treatment temperatures. 316L stainless steel coatings were fabricated by atmospheric plasma spray (APS) and then the as-sprayed coating was heat-treated at 300~700 ℃. Microstructure and phase compositions of the coatings were analyzed by optical microscopy (OM) and X-ray diffractometer (XRD). Micro-hardness of the coatings was measured by Vickers hardness tester. Friction coefficients and wear volume were tested by the tribometer and three-dimensional optical profilometer. The worn surface was inspected by field-emission scanning electron microscopy (FE-SEM) and the wear mechanisms were discussed deeply. The as-sprayed 316L stainless steel coating had a thickness of approximately 350 m and a microhardness of 335HV0.1. There existed unmelted particles, pores and oxides in the coating. The friction coefficient of the coating stabilized around 0.75 and the wear rate was (1.329±0.14)×105 mm3/(N•m). With the increase of heat treatment temperature, oxidation behavior between the splats was clear whereas the pores became narrowed and the microstructure of the coatings was more compacted, resulting in an increase of the hardness of the coating by 30%. The wear resistance of the coating reached the best at 700 ℃ and the wear rate was (1.149±0.26)×105 mm3/(N•m) which reduced by 14% compared with that of the as-sprayed coating. Wear mechanisms were dominated by fatigue and adhesion wear. Heat treatment is beneficial to increase the microhardness of 316L stainless steel coatings and heat treatment at 700 ℃ can effectively improve the wear resistance of the coatings. |
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