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首页> 外文期刊>Applied Surface Science >Improvement in friction by cw Nd : YAG laser surface treatment on cast iron cylinder bore
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Improvement in friction by cw Nd : YAG laser surface treatment on cast iron cylinder bore

机译：连续Nd：YAG激光在铸铁气缸孔上的表面处理改善了摩擦。

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The reduction of the oil-film thickness in the piston-assembly of automobile engines has lead to it now being necessary to add a cylinder-bore surface treatment, so that oil reserves can be created on it. However in doing this, the initial plateaued texture must be kept. With a Nd:YAG laser source treatments oil reserves holes are formed, which respect the function of the initial bore surface texture. The material, cast iron, is heterogeneous: perlitic matrix and carbon lamellae. The laser treatment will make use of this heterogeneity: as under a cw laser beam, using graphite, with its good insulating material properties, carbon lamellae, which are near the surface, are revealed. Also a high density of lamellae in a hollow against the surface are obtained. In order to improve these new surfaces, friction tests were conducted on a friction bench using samples from engine components as test pieces. In order to know bore roughness evolution, 3D surface topography measurements were made before and after as well as friction tests on surfaces without laser treatment and with laser treatment. The results indicate that these holes can improve oil lubrication time. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 9]
机译：汽车发动机活塞组件中油膜厚度的减小导致现在有必要增加气缸孔表面处理，以便可以在其上形成油储备。但是，这样做时必须保持初始平稳状态。使用Nd：YAG激光源处理后，会形成储油孔，这些孔会尊重初始孔表面纹理的功能。铸铁材料是异质性的：珍珠岩基质和碳薄片。激光处理将利用这种异质性：就像在连续激光束下一样，使用具有良好绝缘材料性能的石墨，会暴露出靠近表面的碳薄片。还获得了相对于表面的中空的高密度薄片。为了改善这些新表面，在摩擦试验台上进行了摩擦试验，使用了发动机部件的样品作为试件。为了了解孔的粗糙度变化，在未进行激光处理和激光处理的表面上进行了3D表面形貌测量，然后进行了摩擦测试。结果表明，这些孔可以改善油润滑时间。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：9]

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