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铸坯鼓肚 (Centre-line segregation can be reduced by decreasing the casting temperature, avoiding the bulging of the strand in the final solidification area, electromagnetic stirring, the thermal or mechanical soft reduction. 通过降低浇注温度、避免铸坯终凝区鼓肚、电磁搅拌以及热或机械轻压下,可以减轻铸坯中心线偏析。) |