ウォーキングバー (W.B.) 間接冷却方式曲型連続鋳造機の冷却能の解析とその品質に関する 2, 3 の考察

概要

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The Kobe Steel has built a W.B.-curvilinear type continuous casting machine at Kakogawa plant ; this machine has a special indirect cooling system named W.B. in it's upper part of the secondary cooling zone. Solidification constants, K's of this machine are as follows : (i) Mold zone K_M=29.8 (mm min^<-1/2>) (ii) W.B. zone K_<W.B.>=23.9 (〃) (iii) Roller zone K_R=21.9 (〃) An analytical simulation of cooling capacity has been made by a computer. As a result, the average heat transfer coefficient of W.B. zone is found about 320kcal/m^2hr℃, and the average heat transfer coefficient of W.B. is 360kcal/m^2hr℃ when it contacts with the slab surface. The components of them are as follows : (i) Radiation 270kcal/m^2hr℃ (ii) Convection (gas) 48kcal/m^2hr℃ (iii) Contact 42kcal/m^2hr℃ Concerning the quality of the product, the following characteristics are obtained : (i) The slab is kept in good uniformity, so the error in the weight per unit length is within a 0.5% deviation. (ii) The equiaxial crystal zone occupy about 30% of the slab width in a usual slab. (iii) The centerline segregation is slight. (iv) Few large inclusions can be found.
社団法人日本鉄鋼協会の論文
1974-06-01