发动机气缸体的材料大部分是优质合金铸铁。在发动机工作过程中,由于润滑油道不畅通或者机油质量不符合要求等原因,发动机主轴承转动而使气缸体主轴承承孔磨损、拉伤的现象屡见不鲜。用电刷镀工艺修复发动机气缸体主轴承承孔具有较高的实用价值,原因是:发动机气缸体的材质一般较疏松,很容易和刷镀液中的金属离子结合,所以刷镀层和基体金属的结 Most of the engine cylinder block material is high-quality alloy cast iron. During the working process of the engine, due to the unblocked lubricating oil passage or the unqualified oil quality, the main bearing of the engine is rotated and the main bearing bearing hole of the cylinder body is worn and the phenomenon of strain is not uncommon. Brush plating process to repair the engine cylinder block bearing bore has a high practical value, because: the engine cylinder body material is generally loose, it is easy to brush the bath with the metal ions, so the brush plating and the base metal The knot