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    • 5. 发明授权
    • Process for the production of ferritic stainless steel sheets or strips
and products produced by said process
    • 用于生产铁素体不锈钢板或带材的方法和由所述方法生产的产品
    • US4373971A
    • 1983-02-15
    • US222762
    • 1981-01-06
    • Tadashi SawataniMitsuo IshiiHirofumi Yoshimura
    • Tadashi SawataniMitsuo IshiiHirofumi Yoshimura
    • C21D9/46C21D6/00C21D8/02C22C38/18
    • C22C38/18C21D8/0205
    • In a process for the production of cold rolled ferritic stainless steel sheets or strips, a hot rolled strips has been annealed by a long time batchwise annealing and cold rolling and recrystallization annealing have been repeated usually twice. In the present invention, a hot rolled steel strip of an Al-containing ferritic stainless steel is heated by continuous annealing to a temperature of from 850.degree. to 1100.degree. C., AlN (aluminum nitride) is precipitated in the dispersed state and then cooling the strip to a temperature of 700.degree. to 900.degree. C., performing subsequent cooling to a level not higher than 200.degree. C. at such a cooling rate that a chromium depletion layer, which causes a gold dust defect, is not formed around the chromium carbonitride. Single cold rolling and recrystallization annealing are carried out in combination until the thickness is reduced to the gauge thickness.
    • 在制造冷轧铁素体不锈钢板或带材的方法中,通过长时间间歇退火退火热轧带材,冷轧和重结晶退火通常重复两次。 在本发明中,通过连续退火将含Al铁素体系不锈钢的热轧钢带加热至850〜1100℃的温度,在分散状态下析出AlN(氮化铝),然后冷却 将该条带放置在700℃至900℃的温度下,以这样的冷却速度进行随后的冷却至不高于200℃的水平,使得在其周围不形成导致金粉尘缺陷的铬耗尽层 碳氮化铬。 进行单次冷轧和再结晶退火,直到厚度减小到规格厚度。