Rao Jinyuan, Zhang Mengyun, Chen Jun, et al. Process Plactice on Improvement of Internal Quality of 300 mm x 400 mm Cast Bloom of Steel 42CrMo by Soft Reduction[J]. Special Steel, 2022, 43(1): 39-43.
Rao Jinyuan, Zhang Mengyun, Chen Jun, et al. Process Plactice on Improvement of Internal Quality of 300 mm x 400 mm Cast Bloom of Steel 42CrMo by Soft Reduction[J]. Special Steel, 2022, 43(1): 39-43.DOI:
through established solidification heat transfer model of
300 mm x400 mm continuous casting bloom? in reasonable reduction zone the reduction of No. 4
5
6 and 7 roller being "1 mm-2 mm-3 mm-1 mm” is defined
and the industrial experiment is carried out. The experimental results show that the soft reduction process has little effect on the solidification structure of the bloom
but the cent
ral compactness and segregation can be improved obviously. The size of the largest porosity point in the core of bloom is reduced from 1 106 μm x 608μm to 600 μm x 334 μm; the carbon segregation index range on the cross section is reduced from 0. 889 ~ 1. 095 to 0. 962 ~ 1. 064. The soft reduction process can effectively improve the internal quality of the bloom.