(1. 高新张铜股份有限公司，张家港 215600；2. 大连理工大学 铸造中心，大连 116024)
摘 要:
关键字: 白铜合金；管坯；连铸；旋转电磁场
（1. Gaoxin Zhangtong Co. LTD, Zhangjiagang 215600, China;2. Research Center of Foundry Engineering, Dalian University of Science and Technology, Dalian 116024, China）
Abstract:A new method was proposed by imposing a rotating electromagnetic field during horizontal continuous casting of thin-walled cupronickel tube billets. The effects of electromagnetic field on the surface quality, solidification structure and mechanical properties were investigated experimentally by use of BFe10-1-1 alloy. The results show that, when the electromagnetic field was applicated, the flowability and filling capacity of cupronickel alloy are increased, the surface cracks are eliminated, and the thin-walled cupronickel tube billets with smooth surface can be obtained due to the increase of flowability and filling capacity of cupronickel alloy. The solidification structure of the tube billets is evidently refined, the shape of Ni-rich phase changes from needle-like to bulk and the casting stress declines from 7.2 to 0.32 MPa. With the structure improving, the tensile strength and elongation increase by 5% and 36%, respectively, than those of ordinary continuously cast tube billets.
Key words: cupronickel alloy; tube billets; continuous casting; electromagnetic field
