压铸制备大长径比铸件气孔缺陷分析及对策  

Defect Analysis and Countermeasures on Blowhole Defects of Large Length-to-diameter Ratio Casting Prepared by Pressure Casting

作　　者：李玉章 李星华 梁智 李雨耕 张永平 雷华志 LI Yu-zhang;LI Xing-hua;LIANG Zhi;LI Yu-geng;ZHANG Yong-ping;LEI Hua-zhi(Kunming Metallurgical Research Institute Co.,Ltd.,Kunming,Yunnan 650031,China;State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals,Kunming,Yunnan 650031,China)

机构地区：[1]昆明冶金研究院有限公司,云南昆明650031 [2]有色金属强化冶金新技术全国重点实验室,云南昆明650031

出　　处：《云南冶金》2023年第S01期204-209,共6页Yunnan Metallurgy

基　　金：云南省科学技术厅创新引导与科技型企业培育计划(202104AR040008);云南省科学技术厅中央引导地方科技发展资金(202207AB110003);中国铜业有限公司重点科技计划项目(20200601)。

摘　　要：针对压铸制备大长径比横梁易出现的气孔问题,分析了缺陷产生的原因并采取了相应对策,经过工艺优化制备出的大长径比整体横梁整体抗弯强度达到73.33 MPa,开口吊耳、闭合吊耳有效载荷分别为844 kg、1894 kg。整体横梁电阻率为理论值的100.4%,使用平均温度低于焊接横梁3.2℃,横梁整体性能实现了较大程度提升。Large length-to-diameter ratio cross beam prepared by pressure casting is prone to occur blowhole problem,therefore the causes of defects were analyzed and the corresponding countermeasures were taken,the large length-to-diameter ratio cross beam prepared by optimal process that the overall bending strength can reach to 73.33 MPa,the effective load of open hanging lugs and close hanging lugs seperatly were 844 kg and 1894 kg.The specific resistance of overall cross beam is 100.4%of theoretical value,the average operating temperature is 3.2℃,which is lower than welding temperature of cross beam,the overall performance of cross beam has a large improvement.

关 键 词：锌电积 阴极板 整体横梁 大长径比铸件 压铸缺陷 铸件气孔 

分 类 号：TD928[矿业工程—选矿]