应用惰性气体保护技术提高活塞铸件成品率  

Application of Inert Gas Protection Technology to Piston Casting for Improvement of Yield Rate

作　　者：崔岁绵 刘永军 李强 杨进 CUI Sui-mian;LIU Yong-jun;LI Qiang;YANG Jin(MAHLE Engine Components(Yingkou)Co.,Ltd.,Yingkou 115001,Liaoning,China;MAHLE Engine Components(Nanjing)Co.,Ltd.,Nanjing 210032,Jiangsu,China)

机构地区：[1]马勒发动机零部件(营口)有限公司,辽宁营口115001 [2]马勒发动机零部件(南京)有限公司,江苏南京210032

出　　处：《铸造》2021年第8期991-996,共6页Foundry

摘　　要：随着对活塞轻量化要求的提高,活塞结构中面窗壁厚、燃烧室厚度也越来越薄。在活塞铸造过程中,合流线、冷隔等铸造缺陷问题也变得尤为突出。为解决该问题,利用铸件充型过程惰性气体保护技术,有效地提高了铝合金液的充型能力,从而解决了现有缺陷问题,降低了铸造废品率。批量生产中,铸造废品率从最高的4.70%下降到0.18%.With the increasing need for lightweight piston,the wall thickness of window and combustion chamber are becoming thinner and thinner.In the process of piston casting,the casting defects such as confluence line and cold shut become particularly prominent.In order to eliminate these defects,inert gas protection technology was used,which improved effectively the filling ability of aluminum alloy melt,and the casting defects thereby were reduced.In the mass production,the casting scrap rate decreased from the highest 4.70% to 0.18%.

关 键 词：活塞铸造 惰性气体 氧化夹杂 冷隔 

分 类 号：TG245[金属学及工艺—铸造]