出口汽车皮带轮外圈铸件的工艺改进  

Technology Improvement of Outer Belt-wheel Castings for Export Automobile

作　　者：李军[1] 赵景洪 

机构地区：[1]九江学院机械与材料工程学院,江西九江332005 [2]黄石东贝铸造有限公司,湖北黄石435000

出　　处：《铸造技术》2010年第12期1569-1571,共3页Foundry Technology

摘　　要：针对汽车皮带轮外圈铸件产生缩孔、皮下气孔和渣砂眼、金相组织不符、加工性能差等铸造缺陷,分析原铸造工艺,找出问题所在。采取改进浇注系统、合金化和加强孕育处理等工艺措施,基本消除了铸造内部缺陷,铸件综合成品率超过95%。Refer to the defects such as shrinkage,subsurface blow hole,slag and sand inclusion,metallographic abnormal,and lower machining property etc.on the outer belt-wheel castings,the original foundry technology was analyzed and the root cause was found out.Meanwhile the technical measures of changing pouring system design,using alloying and strengthen the inoculation treatment were taken.After improvement it basically eliminated the casting internal defects,and the casting overall qualification rate has reached over 95%.

关 键 词：缩孔 皮下气孔和渣砂眼 金相组织 加工性能 工艺改进 

分 类 号：U464.13[机械工程—车辆工程] TG245[交通运输工程—载运工具运用工程]