球轴承滚动体表面处理技术的研究

发布时间：2018-01-16 16:37

本文关键词：球轴承滚动体表面处理技术的研究　出处：《大连海事大学》2011年硕士论文　论文类型：学位论文

【摘要】：随着微纳米技术的发展,微纳米材料不断应用于表面工程之中,纳米表面工程应运而生。本文利用行星式球磨机与蛇纹石和二硫化钼的微纳米粒子对球轴承滚动体进行了表面处理,形成了一层表面改性膜,大大提高了滚动体的抗摩擦磨损能力。本文具体的技术路线和结论如下： (1)采用行星式球磨机制备微纳米粒子,随后,利用行星式球磨机对滚动体表面进行处理,初步确定了两种处理方案,一是采用蛇纹石微纳米粒子作为处理原料,球磨机转速设定为428r/min,球料比为10：1。二是采用二硫化钼微纳米粒子作为处理原料,球磨机转速设定为315r/min,球料比为10：1。 (2)利用能谱仪、扫描电镜以及金相显微镜分析了滚动体表面改性膜层的形成机理,采用蛇纹石为原料的表面处理试验的机理为在物理吸附的基础上,在滚动体表面发生了化学吸附,形成了铁硅酸盐新晶体,而以二硫化钼为原料的表面处理试验的机理为在物理吸附的同时,随着球磨时间不断延长,在滚动体表面发生了摩擦化学反应,形成了一层含有Mo元素的保护膜层。并利用扫描电镜分析了滚动体样品横截面的表面形貌,最终测得采用蛇纹石为原料的滚动体表面改性膜层的厚度可以达到4μm,而以二硫化钼为原料的滚动体表面改性膜层的厚度为2.5μm。 (3)对两种处理方案得到的滚动体样品,利用扫描电镜、显微维氏硬度计和摩擦磨损试验机对滚动体表面改性膜层的性能进行了分析对比。在滚动体表面改性膜层与基体结合强度的分析中得到,以蛇纹石微纳米颗粒作为处理原料的滚动体样品表面改性膜层的结合状态优于以二硫化钼微纳米颗粒作为处理原料所得到的滚动体样品。通过滚动体横截面硬度梯度的分析试验中发现,两种处理方案所得到的滚动体表面硬度都有了一定程度的提高。在对摩擦磨损试验结果的分析中得到,以蛇纹石微纳米颗粒为处理原料的滚动体抗摩擦磨损性能优于以二硫化钼微纳米为处理原料的滚动体样品。
[Abstract]:With the development of micro and nano technology, micro and nano materials have been used in surface engineering. Nano-surface engineering came into being. In this paper, the surface of ball bearing rolling body was treated with planetary ball mill, serpentine and molybdenum disulfide microparticles, and a surface modified film was formed. The friction and wear resistance of the rolling body is greatly improved. The specific technical routes and conclusions of this paper are as follows: The surface of the rolling body was treated with the planetary ball mill and two treatment schemes were preliminarily determined. 1) the microparticles were prepared by the planetary ball mill and then the surface of the rolling body was treated by the planetary ball mill. One is to use serpentine microparticles as raw material, the rotational speed of ball mill is set at 428r / min, the ratio of ball to material is 10: 1. Second, molybdenum disulfide microparticle is used as raw material. The speed of the ball mill is set to 315 r / min, and the ratio of ball to material is 10: 1. (2) the formation mechanism of the surface modified film layer of rolling body was analyzed by means of energy spectrometer, scanning electron microscope and metallographic microscope. The mechanism of surface treatment with serpentine as raw material was based on physical adsorption. A new ferric silicate crystal was formed by chemisorption on the surface of the rolling body. The mechanism of the surface treatment experiment using molybdenum disulfide as the raw material was that the physical adsorption was at the same time and the milling time was prolonged. A protective film containing Mo element was formed by frictional chemical reaction on the surface of the rolling body, and the surface morphology of the cross section of the rolling body sample was analyzed by scanning electron microscope (SEM). Finally, the thickness of the surface modified film of the rolling body using serpentine as the raw material can reach 4 渭 m, while that of the rolling body with molybdenum disulfide as the raw material is 2.5 渭 m. (3) scanning electron microscopy (SEM) was used for the scrolling sample obtained from the two treatment schemes. The properties of the modified film on the surface of the rolling body were analyzed and compared with the friction and wear tester, and the results were obtained from the analysis of the bonding strength between the modified film and the substrate on the surface of the rolling body. The bonding state of the surface modified film layer with serpentine microparticles as raw material is better than that with molybdenum disulfide microparticle as raw material. The cross section hardness of rolling body is obtained by rolling body cross section hardness. The gradient analysis test found. The surface hardness of the rolling body obtained by the two treatment schemes has been improved to some extent, and the results of the friction and wear tests have been obtained. The friction and wear resistance of the rolling body treated with serpentine microparticles is better than that of the rolling body sample treated with molybdenum disulfide.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH133.3;TG178

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