精铸不锈钢螺母的型壳岩棉补贴  

Shell with Rock Wool Subsidies for Stainless Steel Nuts

作　　者：朱九成[1] 杜秀菊[1] 朱苏 

机构地区：[1]河北师范大学机械系 [2]石家庄恒业机电有限公司

出　　处：《特种铸造及有色合金》2013年第8期749-750,共2页Special Casting & Nonferrous Alloys

基　　金：河北师范大学科研基金项目(L2011Y08)

摘　　要：解决铸件热节缩孔尤其是远离冒口的热节缩孔,有效的办法是设计冒口补贴。但冒口补贴不仅增加了金属液的用量还会造成铸件力学性能下降。清除冒口补贴会使铸件表面质量变差又浪费大量工时。通过试验,对于精铸螺母用型壳外岩棉补贴代替冒口补贴取得了良好效果,使该精铸件的缩孔、缩松废品率由100%降到了4%以下,缩孔废品率由28%降到了0。To solve the casting shrinkage hole especially hot spot away from riser shrinkage, it is an effective way to design riser subsidies. However, the riser subsidies not only increases the metal liquid weight but also decrease mechanical properties. In addition, removal of riser subsidies can deteriorate casting surface quality and waste a lot of time as well as difficult to design riser subsidies on some parts. Through experiment, rockwool subsidies instead of riser subsidies for shell of nut exhibits acceptable effects, which decreased keyhole rejects from 100% to 4% and the shrinkage rate of waste from 28% to 0.

关 键 词：精铸件 岩棉补贴 热节缩孔 冒口补贴 

分 类 号：TG249.5[机械工程—精密仪器及机械]