連鋳スラブ中のポロシティの消滅におよぼす圧延条件の影響

概要

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Effects of hot rolling parameters on the annihilation of porosities in continuous casting slabs or ingots were investigated using specimens which include artificial porosities (sphere and cube). It was revealed that, of hot rolling parameters, the reduction ratio and the rolling shape factor are essential factors for the annihilation, whereas the rolling temperature is less influential. The following formulae was derived to predict the rolling conditions required for the annihilation of porosities. d_0 H_k/H_0-Σ^^k__<j=1>H_k/H_jw_0(c_0+c_1m_j+c_2m^2_j)≤0, m_j=2√<R(H_<j-1>-H_j)>/(H_<j-1>+H_j) (j=1, 2, ……k) where d_0, w_0 : initial porosity size of thickness and width respectively, j : index of rolling pass schedule, H_j : plate thickness after j-th rolling pass (H_0 : initial thickness), R : radius of work rolls, c_0, c_1, c_2 : constants.
社団法人日本鉄鋼協会の論文
1980-02-01