FACILITY FOR CONTINUOUS ANNEALING OF STEEL SHEET AND METHOD FOR MANUFACTURING ANNEALED STEEL SHEET

• Main Authors: MURATA TADAO, NAKAYAMA SHINOBU, MORISHIGE SEIJI, MURAKAMI TOSHIO
• Format: Patent
• Language: English; Japanese
• Published: 10.10.2019
• Subjects: CHEMISTRY; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS

To provide a facility for continuous annealing of steel sheets in which a wide variety of high-strength steel sheets and plated steel sheets can be manufactured in accordance with various requirements in one facility.SOLUTION: The facility for continuous annealing of steel sheets includes: a heating zone for heating a steel sheet; a slow-cooling zone for slowly cooling the steel sheet having passed through the heating zone, a cooling zone for cooling the steel sheet having passed through the slow-cooling zone, and a reheating zone for reheating the steel sheet having passed through the cooling zone. Between the cooling zone and the reheating zone, there is provided a slow-cooling heat retaining zone for slowly cooling or warming the steel sheet having passed through the cooling zone, and a re-cooling zone for re-cooling the steel sheet having passed through the slow-cooling heat retaining zone.SELECTED DRAWING: Figure 1 【課題】本発明は、１つの設備で多岐にわたる個々の要求に応じた多種類の高強度鋼板やめっき鋼板を製造できる鋼板連続焼鈍設備の提供を目的とする。【解決手段】本発明の鋼板連続焼鈍設備は、鋼板を加熱する加熱帯と、上記加熱帯を通過した鋼板を徐冷する徐冷帯と、上記徐冷帯を通過した鋼板を冷却する冷却帯と、上記冷却帯を通過した鋼板を再度加熱する再加熱帯とを有する鋼板の連続焼鈍設備であって、上記冷却帯及び上記再加熱帯の間に、上記冷却帯を通過した鋼板を徐冷又は保温する徐冷保温帯と、上記徐冷保温帯を通過した鋼板を再度冷却する再冷却帯とを有する。【選択図】図１