Nb 添加フェライト系ステンレス鋼の冷延板再結晶温度におよぼす熱延板焼鈍条件の影響

概要

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The influence of aging at hot bands on the recrystallization of cold rolled sheets in a 15mass%Cr-0.46mass%Nb ferritic stainless steel was investigated. The results obtained are as follows : (1) The recrystallization temperature of cold rolled sheets which were aged at the temperature range from 700℃ to 750℃ for 2 hours or long times in hot bands was lower than that of no aging. After aging of hot bands, the content of Nb as precipitates was about 0.45%, which was nearly equal to the total content of Nb. The main precipitates was detected as Fe_2Nb-Laves phase. It is considered that Fe_2Nb-Laves phase, which grows coarsely during hot band aging, is contributed to lowering the recrystallization temperature of cold rolled sheets. (2) In the case of no aging in hot bands, a large amount of solute Nb existed in hot bands before cold rolling. Fine Fe_2Nb-Laves phase precipitating at approximately 700℃ might mainly suppress the recrystallization of cold-rolled sheets.
社団法人日本鉄鋼協会の論文
1998-09-01