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我厂212汽油机活塞材料是铸铝合金,为外厂提供的配套件。由于在浇注技术或设计上的某些原因,往往在活塞的一些重要部位隐藏有不同程度的铸造缺陷,如疏松、气孔等。由于在工作过程中承受3吨多的周期性载荷,所以在活塞的顶部和肖孔附近,如果存在比较严重的铸造缺陷,使用一段时间后会使活塞变形、开裂、甚至整块脱落。据用户反映,此种情况常见于活塞的顶部。
I plant 212 gasoline engine piston material is cast aluminum alloy, provided for the external components. Due to casting technology or design for some reasons, often in some important parts of the piston hidden casting defects of varying degrees, such as porosity, porosity and so on. Due to the cyclical loads of more than 3 tons during the working process, if there is a serious casting defect near the top and the small hole of the piston, the piston will deform, crack or even be lost after a period of use. According to user feedback, this situation is common in the top of the piston.