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61. 发明专利

JPS5723024A Manufacture of ferrite stainless steel plate 失效
标题翻译：铁素体不锈钢板的制造
公开(公告)号：JPS5723024A
公开(公告)日：1982-02-06
申请号：JP9569980
申请日：1980-07-15
申请人： Nippon Steel Corp
发明人： IZUMI SOUICHI , ASHIURA TAKEO , KOYASU YOSHIROU , YAMAMOTO AKIO , UCHIDA HISASHI
IPC分类号： C22C38/00 , C21D8/02 , C21D9/46
CPC分类号： C21D8/0205
摘要： PURPOSE:To obtain a stainless steel plate having excellent resistance to intergranular corrosion, ridging, etc., by a simplified process in which an Al-containing ferrite stainless steel slab is continuously annealed under a specific condition to obtain a final product without the need for intermediate annealing treatment. CONSTITUTION:A 17-Cr ferrite stainless steel slab containing 0.07 to 0.25% Al is heated at 1,050 to 1,250 deg.C and then hot-rolled. Then, the hot-rolled steel plate is heated at 900 to 1,050 deg.C, held in the temperature range for a period of 20min or less, and then air-cooled to room temperature. After the continuous annealing, the steel plate is cold-rolled to the thickness of a final product by 1CR process (process wherein a primary annealing stage is eliminated) without the need for intermediate annealing treatment, and then subjected to recrystallization and annealing treatments. Thus, the formation of gamma-phase during high-temperature annealing treatment can be suppressed, so that a ferrite stainless steel plate having characteristics equal or superior to those of products obtained by box-annealing-2CR (process wherein 2 cold-rolling and 2 annealing stages are contd.) processes can be obtained.
摘要翻译：目的：为了获得具有优异的耐晶间腐蚀，起皱等优异性能的不锈钢板，通过简单的方法，其中含铝铁素体不锈钢板在特定条件下连续退火以获得最终产品，而不需要中间退火处理。构成：将含有0.07-0.25％Al的17-Cr铁素体不锈钢板加热到1050至1250℃，然后热轧。然后，将热轧钢板在900〜1050℃加热，保持在20分钟以下的温度范围内，然后风冷至室温。连续退火后，钢板通过1CR工艺（其中初始退火阶段被消除的方法）冷轧成最终产品的厚度，而不需要中间退火处理，然后进行重结晶和退火处理。因此，可以抑制高温退火处理中的γ相的形成，使得具有与通过箱式退火-2CR获得的产品相同或优于其的特性的铁素体不锈钢板（其中2冷轧和2 退火阶段是可以获得的）。

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