最近の分塊歩留り向上技術(<特集>圧延歩留り向上の技術と理論)

概要

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Based on extensive utilization of traditional improvement techniques of slabbing yield and several newly-developed improvement ones, a record-breaking yield of 96.8% has been achieved for capped steel ingots in Nagoya Works, Nippon Steel Corp. The new techniques are as follows : 1) Determination of optimum ingot profile to maximize yield such as cross-section dimensions, ingot top-corner profile and top capped figure. 2) Introduction of special rolling precesses of ingot such as one-way rolling and reverse one-way rolling. 3) Development of defect free capped steel ingot making method with bottom pouring technique and defect minimization rolling method. 4) Development of multi-step well type bottom plate to minimize slab crop. It has been actually proved that these new techniques give a great yield improvement and the cost for adequately compensated by the effects.
社団法人日本鉄鋼協会の論文
1981-11-01