发明授权
US4373971A Process for the production of ferritic stainless steel sheets or strips and products produced by said process 失效
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

Process for the production of ferritic stainless steel sheets or strips
and products produced by said process
摘要:
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.
信息查询
0/0