纯铜砂型铸件表面缺陷预防措施.pdfVIP

学兔兔 Dec．2008 铸 造 Vo1．57 N0．12 FOUNDRY i319· 纯铜砂型铸件表面缺陷预防措施 苏义祥 ，丁 丁 ，门志慧 (1．兰州理工大学有色金属舍金及加工教育部重点实验室，甘肃兰州730050； 2．兰州理工大学材料科学与工程学院，甘肃兰州730050) 摘要：对纯铜砂型铸件在铸造过程中表面容易产生的冷隔(皱皮)、凹(凸)坑、粘砂 (粗糙)、聚渣 (结疤)等缺陷 分析后，认为：提高纯铜铸件表面质量是一个综合性的铸造工艺过程，必须对型砂质量、砂型紧实率、砂型涂料质量、 液态金属质量、浇注系统及浇注工艺过程等方面实施严格控制和预防，能够得到表面光洁的纯铜铸件。 关键词：纯铜；砂型铸件；表面缺陷；预防措施 中图分类号：TG245 文献标识码：B 文章编号：1001—4977(2008)12—1319—03 Preventive Mreventive Measure fOr SUrface Defect of PureeasuretOr urtace efect O re C—opper Sand Mold Casting SU Yi-xiang’，DING Ding ，MEN Zhi—hui’ (1．Lanzhou University of Technology State Key Laboratory of Gansu Advanced Non—ferrous Meta Materials，Lanzhou 730050，Gansu，China；2．College of Materials Science and Engineering of Lanzhou University of Technology，Lanzhou 730050，Gansu，China) Abstract：The SU ce defects that easily occurred in the pure copper sand mold casting，such as cold lap (flow mark)，surface crater(salient)，burn-on(roughness)，slag conglomeration(rolling skin)and s0 0n were analyzed．Results show that it iS a comprehensive foundry technique process to improve the surface quality of pure copper castings．To Obtain the pure copper casting with clean surface，the quality of molding sand and coating，the compacthess of sand mould，the quality of Iiquid metaI。as welI as the gating system and the pouring process must be strictly controlled． Key words：pure copper；sand mold casting；surface defect；preventive measure 由于纯铜 (紫铜、电解铜)具有优良的导电和导热 1．2 熔炼设备 性能，越来越多的在机械、冶金、电子仪表、电力制