球化剂品质对活塞座圈铸件缩松的影响

Effect of Nodulizer Quality on Dispersed Shrinkage of Piston Seat Ring Castings

活塞座圈是结构复杂铸件,生产中易产生缩松缺陷。在本试验中,通过降低球化剂MgO含量,提高铁液的纯净度,提升铸件凝固过程中铁液的补缩能力以及石墨化膨胀能力,从而减少或消除活塞座圈铸件缩松的发生。

Piston seat ring castings with complex structure are easy to produce shrinkage defects in production.In this wok,by reducing the content of MgO in nodulizer and improving the purity of molten iron,the feeding capacity and graphitization expansion capacity of molten iron in the solidification process of casting were improved.Therefore,the dispersed shrinkage defects of the piston seat ring castings were reduced or eliminated.