使用氧化铝粉末在 35 号钢上沉积抗磨损 Cr-Fe-Al2O3 涂层

IF 0.5 4区 工程技术 Q4 ENGINEERING, MECHANICAL
A. A. Burkov, M. A. Kulik, A. Yu. Bytsura, M. A. Ermakov
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引用次数: 0

摘要

摘要 利用电火花合金化技术,在钢粒与铬和氧化铝粉末的混合物中,在 35 号钢上获得了 Cr-Fe-Al2O3 涂层。利用 X 射线衍射分析、扫描电子显微镜和 X 射线光谱显微分析研究了涂层的结构。在 700°C 的高温空气中对涂层的耐热性进行了 100 小时的研究。涂层机械性能的研究包括 0.5 N 负荷下的显微硬度测试和 25 N 负荷下的干摩擦磨损测试。根据 EDS 分析,涂层中的元素在整个涂层厚度上分布均匀,铬浓度约为 60%,铁浓度为 30%,铝浓度为 3.4%。结果表明,氧化铝细颗粒在沉积层的体积中分布均匀。结果表明,金属粉末参与涂层形成的积极性是颗粒的四倍。耐热性测试表明,阳极混合物中加入 Cr-Fe-Al2O3 粉末后,样品的平均高温增重率会增加。一般来说,使用 Cr-Fe-Al2O3 涂层可使 35 号钢的耐热性提高 2.4 至 4 倍。涂层摩擦系数的平均值在 0.76 至 0.83 之间,使用最少 Al2O3 添加量沉积的样品摩擦系数最小。随着阳极混合物中氧化铝浓度的降低,样品的磨损单调地从 3.3 × 10-6 mm3/(N m) 降低到 1.8 × 10-6 mm3/(N m)。总的来说,使用所提出的方法进行 Cr-Fe-Al2O3 涂层处理,可将 35 号钢表面的耐磨性提高 11 至 20 倍。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Wear-Resistant Cr–Fe–Al2O3 Coating Deposition on Steel 35 Using Aluminum Oxide Powder

Wear-Resistant Cr–Fe–Al2O3 Coating Deposition on Steel 35 Using Aluminum Oxide Powder

Wear-Resistant Cr–Fe–Al2O3 Coating Deposition on Steel 35 Using Aluminum Oxide Powder

Using electrospark alloying, Cr–Fe–Al2O3 coatings are obtained on steel 35 in a mixture of steel granules with chromium and aluminum oxide powders. The structure of the coatings is studied using X-ray diffraction analysis, scanning electron microscopy, and X-ray spectral microanalysis. The heat resistance of the coatings was studied for 100 h at a temperature of 700°C in air. The study of the mechanical properties of the coatings includes testing for microhardness under a load of 0.5 N and wear in the dry friction mode under a load of 25 N. According to X-ray diffraction analysis, the coating composition is dominated by ferrochrome and a small amount of aluminum oxide. According to EDS analysis, the element distribution in the coating is uniform throughout the coating thickness with a chromium concentration of about 60 at %, iron, 30 at %, and aluminum, 3.4 at %. The results indicate a uniform distribution of fine particles of aluminum oxide in the volume of the deposited layer. It has been shown that the metal powder participates four times more actively in the formation of the coating compared to the granules. The heat resistance test shows that with addition of Cr–Fe–Al2O3 powder in the anode mixture, the average rate of high-temperature weight gain of the samples increases. In general, the use of Cr–Fe–Al2O3 coatings increases the heat resistance of steel 35 from 2.4 to 4 times. The average values of the friction coefficient of coatings range from 0.76 to 0.83, with a minimum for the sample deposited using a minimal addition of Al2O3. The wear of the samples decreases monotonically from 3.3 × 10–6 to 1.8 × 10–6 mm3/(N m) with a decrease in the concentration of aluminum oxide in the anode mixture. In general, the application of Cr–Fe–Al2O3 coatings using the proposed method makes it possible to increase the wear resistance of the steel 35 surface from 11 to 20 times.

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来源期刊
Journal of Friction and Wear
Journal of Friction and Wear ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
1.50
自引率
28.60%
发文量
21
审稿时长
6-12 weeks
期刊介绍: Journal of Friction and Wear is intended to bring together researchers and practitioners working in tribology. It provides novel information on science, practice, and technology of lubrication, wear prevention, and friction control. Papers cover tribological problems of physics, chemistry, materials science, and mechanical engineering, discussing issues from a fundamental or technological point of view.
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