發(fā)布時間：2019-02-08 17:40

【摘要】：為了提高碳鋼的微動磨損特性,采用不同參數(shù)的滾壓工藝對45號鋼試樣進行表面處理,通過表面形貌測量儀、維氏顯微硬度計和掃描電鏡(SEM)考察在不同參數(shù)下,滾壓工藝對鋼的表面粗糙度、顯微硬度、硬化層的厚度等的影響,然后在SRV IV摩擦磨損試驗機上對比研究各工藝處理試樣的微動磨損特性。研究結(jié)果表明:滾壓工藝使試樣表面形成一定厚度的硬化層,可以降低試樣表面的粗糙度,提高表層顯微硬度;滾壓工藝使試樣的磨損量和摩擦因數(shù)顯著減小;未處理試樣的磨損形式主要為黏著磨損和疲勞磨損,滾壓后試樣以磨粒磨損為主,并伴隨輕微的疲勞剝落;不同的滾壓參數(shù)對45號鋼表面性能和微動性能影響較大,滾壓工藝使45號鋼試樣的抗微動磨損性能更加優(yōu)異。
[Abstract]:In order to improve the fretting wear characteristics of carbon steel, the surface of 45 steel was treated by rolling technology with different parameters. The surface morphology of 45 steel was investigated by means of surface topography measuring instrument, Vickers microhardness meter and scanning electron microscope (SEM). The effect of rolling technology on the surface roughness, microhardness and the thickness of hardened layer of steel was studied. The fretting wear characteristics of the treated samples were compared with each other on SRV IV friction and wear tester. The results show that the rolling process can make the specimen surface form a certain thickness of hardening layer, reduce the roughness of the sample surface, improve the microhardness of the surface layer, and the wear and friction coefficient of the specimen can be significantly reduced by the rolling process. The wear patterns of untreated samples are mainly adhesive wear and fatigue wear. After rolling, abrasive wear is the main wear pattern, followed by slight fatigue spalling. Different rolling parameters have great influence on the surface and fretting properties of 45 steel. Rolling process makes the fretting wear resistance of 45 steel more excellent.
【作者單位】： 華南理工大學機械與汽車工程學院;中國地質(zhì)大學(北京)工程技術學院;
【基金】：國家自然科學基金資助項目(41572362,51375466,51275494)~~
【分類號】：TG142.31;TG306

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