High-efficiency continuous casting of GCr15 bearing steel bloom based on cooperative control technique of complex electromagnetic stirring and soft reductionHanghang An, Yan Ping Bao, Min Wang, Quan Yang, Xiang Hong Wang and Yan Yin DangMetall. Res. Technol., 116 6 (2019) 621DOI: https://doi.org/10.1051/metal/2019051