陶瓷化处理活塞
Piston with Pottery on the Surface
    活塞表面陶瓷化是用“微弧氧化”技术在活塞表面上生成一次层厚度可达300um，表面显微硬度高达2000HV，以冶金结合方式存在，以α-A1²O³和γ-A1²O³为主体的陶瓷硬化层，从而改善了活塞表面的耐磨，耐腐蚀性，氧化后陶瓷层标层分布均匀的盲性微孔，有利于活塞工作时表面连续油膜的形成，活塞表面的润滑性也得到相应提高。该项目列为国家“863”计划，并于2002年通过科技部组织的专家鉴定。

    Pottery on the surface of the position is a hardness layer. Which is laid on surface of the piston and the thickness of it is 300um ,The hardness of the layer can reach 2000HV .It exists in the way of binding meta-lurgy .The principal composition of the layer is -A1203 and –A1203 .The use of his layer improve the wear-resisting and corrosion –resisting performance ,The well-distributed unseen tiny holes on the surface of the layer after oxidation contributes to the formation of the oil film when the piston is working .And the lubrication performance of the piston surface has also been improved .This item has been placed in to the national “863” projects .It was appraised by the exports from the science and technology ministry in 2002 .technical parameter comparison.

技术参数对比：