摘要
在本论文研究中,主要是根据自然界中某些生物体表的非光滑表面具有比光滑表面更耐磨的特性,在模具钢的光滑表面上,利用激光技术模仿这些生物体表形态特征加工出点状、条纹状和网格状单元体,形成非光滑单元体表面。通过金相照片、电镜照片和材料的显微硬度来分析激光参数对单元体的形状、大小、硬度的影响;通过磨粒磨损实验对比试样的磨损量来研究非光滑表面的单元体分布间距、形态、大小、硬度对提高材料耐磨性的影响;简单探讨熔覆合金增强单元体的仿生非光滑表面对材料的耐磨性提高的影响。对以后加工仿生非光滑表面提供参考的参数,最后分析仿生非光滑表面的磨损过程及尝试提出仿生非光滑单元体表面提高材料耐磨性的理论。
经过实验研究得出了如下结论:
材料不同,激光参数不同,非光滑单元体大小、形态、硬度也不同。非光滑表面试样的耐磨性都优于光滑表面试样的耐磨性。熔覆合金单元体的非光滑试样的耐磨性规律与材料退火组织的非光滑试样耐磨性规律相同。
The energy sources wasted by the way of friction finally are about 33 or 50 percentage of the world's energy. The research of the rubbing abrasion and lubricating question will account for the tremendous economic effect. Therefore, many country scientists' great efforts to improve the wear resistance of materials have been very effective. Great development has been achieved in the abrasion and wear assistance of materials. However, it was considered when the smoother the surface of materials was, the smaller the conglutination force to other objects was and so the abrasion resistance during the relative movement was smaller in tradition theory. As a result, the surfaces of the work parts or products which are required to reduce the abrasion resistance or conglutination will be designed to be smooth ones. But the effect was not very obvious.
The bionic research indicates that the rough surfaces of some animals result in reducing the wear resistance with great efficiency. The structure and performance of the kind of animals are very particular after hundreds of millions evolution, which accords with their subsistence circumstance. Many researches have indicated that the animals live in the marshy soil whose bodies are characteristic of geometry rough surfaces. The rough surfaces can result in reducing conglutination, lessening resistance and increasing resistance wear. The tribology and bionic investigations show that the wear resistance of the smooth surfaces will not be best, the other way round, the resistance wear of the non-smooth surfaces may be better. To increase the resistance wear of materials, the investigation is attempted to carry out the non-smooth configurations of material surfaces.
The researches of the non-smooth configuration of the soil animal body surfaces
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