摘要
使用Almex铸造机,试验研究2A14铝合金大规格圆铸锭铸造过程中易产生疏松、成分偏析、底部裂纹等问题。研究结果表明:采用热顶铸造和软起铸工艺可增加铸造成功率,同时通过多级除氢系统和铸造过程持续添加Al-Ti-B丝,使得铸锭内部组织得到改善,当铸造速度为15 mm/min^25 mm/min、铸造温度为700℃~710℃,结晶器水流量控制为20 m^3/h^60 m^3/h时,成功铸造出外观质量合格、晶粒组织细小的2A14铝合金Φ15 mm大规格圆铸锭。
The problems of porosity,composition segregation and bottom crack of large bil-lets of 2A14 aluminum alloy were studied experimentally with the Almex casting machine.The research results show that hot top casting and setting mild aluminum as bedding material can increase the success rate of casting.Meanwhile,the internal structure of the billet is improved through the multi-stage dehydrogenation system and continuous addition of Al-Ti-B wire during the casting process.When the casting speed is 15 mm/min-25 mm/min,casting temperature is 700-710℃,water flow in the mould is 20 m^3/h-60 m^3/h,Φ915 mm billets of 2A14 aluminum alloy are cast successfully with qualified appearance and fine grains.
作者
杨浩
陈仁桂
YANG Hao;CHEN Ren-gui(Guangxi Alnan Aluminum Inc.,Nanning 530031,China)
出处
《轻合金加工技术》
CAS
北大核心
2020年第6期19-22,共4页
Light Alloy Fabrication Technology
基金
广西创新驱动发展专项资金项目(项目编号:桂科AA17204012,桂科AA17202007)。
