论文部分内容阅读
为促进Fe-Mn-C钢连铸技术的发展,对不同锰质量分数的Fe-Mn-C钢铸锭的热物性参数进行了研究。结果表明,0Mn钢的导热系数高于3Mn钢。低于750℃时,6Mn钢的导热系数最低;高于900℃时,6Mn钢的导热系数最高。3个钢种的平均线膨胀系数为1.0×10~(-5)~1.6×10~(-5)℃~(-1)。以Z<60%作为判据,6Mn钢的第Ⅲ脆性区为600~800℃,3Mn钢和0Mn钢的第Ⅲ脆性区分别为600~850℃和600~900℃。在6Mn钢和3Mn钢中,大量生成的形变诱导铁素体(DIF)导致低温区热塑性的恢复。然而,由于连铸矫直过程的应变速率较低,不能生成大量的DIF。因此在连铸过程中,低温区6Mn钢和3Mn钢的热塑性不能恢复。
In order to promote the continuous casting technology of Fe-Mn-C steel, the thermophysical parameters of Fe-Mn-C steel ingots with different Mn content were studied. The results show that the thermal conductivity of 0Mn steel is higher than 3Mn steel. When less than 750 ℃, the thermal conductivity of 6Mn steel is the lowest. When it is higher than 900 ℃, the thermal conductivity of 6Mn steel is the highest. The average coefficient of linear expansion of the three steels ranged from 1.0 × 10 ~ (-5) to 1.6 × 10 ~ (-5) ℃ ~ (-1). Based on Z <60%, the third brittle zone of 6Mn steel is 600-800 ℃, and the third brittle zone of 3Mn steel and 0Mn steel is 600-850 ℃ and 600-900 ℃, respectively. In 6Mn steel and 3Mn steel, a large amount of deformation-induced ferrite (DIF) results in the thermoplastic recovery in the low temperature region. However, due to the low strain rate in the continuous casting straightening process, a large amount of DIF can not be produced. Therefore, in the continuous casting process, the low temperature zone 6Mn steel and 3Mn steel thermoplastic can not be restored.