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论文类型：期刊论文

发表时间：2013-02-01

发表刊物：INTERNATIONAL JOURNAL OF CAST METALS RESEARCH

收录刊物：SCIE、EI、Scopus

卷号：26

期号：1

页面范围：37-42

ISSN号：1364-0461

关键字：Rotating magnetic field; RMF; CuNi10Fe1Mn alloy; Solidification structures; Segregation; Growth morphology

摘要：CuNi10Fe1Mn alloy has excellent corrosion resistance, thermal conductivity and mechanical properties, and is widely used as a condenser material in thermal power, nuclear power, sea water desalination industry and other applications. However, the distribution of Ni in CuNi10Fe1Mn alloy hollow billets presents severe segregation. The use of a rotating magnetic field (RMF) significantly refines solidification structures, reduces segregation of Ni and changes growth morphologies of the Ni rich phase in horizontal continuous casting of CuNi10Fe1Mn alloy hollow billets. The original inhomogeneous columnar grain macrostructure turns into a homogeneous equiaxed grain structure, and the microstructures display different refined morphologies by the RMF. The Ni rich phase is distributed uniformly, and the values of segregation ratios increase respectively. Moreover, the growth morphologies of Ni rich phases under RMF change from irregular globules to sphere-like, whereas those without RMF show a transformation from small, stone-like to bar-like morphology.