厚大铸铁皮带轮缺陷的成因与控制措施  

Analysis on Defects in Heavy Casting Iron Belt Pulley and Improvement of Technology

作　　者：金桂芹[1] 王秋芝[2] 阎涛[1] JIN Gui-qin;WANG Qiu-zhi;YAN Tao(Huanggang Normal University,Huanggang Hubei 438000,China;HBIS Tang Steel Co,Ltd.,Tangshan Hebei 063000,China)

机构地区：[1]黄冈师范学院机电学院,湖北黄冈438000 [2]河北钢铁(集团)唐钢股份有限公司,河北唐山063000

出　　处：《装备制造技术》2018年第10期218-220,共3页Equipment Manufacturing Technology

摘　　要：分析了厚大V型带轮缩孔缩松缺陷的形成原因及防止措施,V型带轮材质为HT250,壁较厚,采用树脂砂型铸造,通过合理控制浇注温度及速度,优化铸造工艺设计,严格控制化学成分,能够减轻甚至消除厚大轮式铸件在热节部位出现的缩孔缩松缺陷,使其完全满足性能要求,并为直径在800～1 500 mm间的中大型轮式铸件生产提供参考。In this paper,the causes of shrinkage cavity and porosity of heavy casting iron belt pulley and the prevention measures are analyzed.The material of the casting is HT250,and it have thick wall.Through molding of resin-bonded sand,the process make full use of self feeding effect of graphitization expansion.It can reduce or even eliminate the shrinkage defects that appears in the hot spot of heavy wheel castings.The result show that it fulfill well meet the requirements of the performance,and it is available for 800~1500mm in diameter heavy wheel castings production.

关 键 词：厚大V型带轮 树脂砂 热节 缩孔缩松缺陷 

分 类 号：TG2[金属学及工艺—铸造]