Annealing method of ultrahigh N austenitic stainless steel cold coil

• Main Authors: FAN JIANYONG, WEI HAIRUI, PEI MINGDE, LIANG XIANGXIANG, YANG CHANGCHUN, LI GUOPING, QIN YUHANG
• Format: Patent
• Language: Chinese; English
• Published: 22.08.2023
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; 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; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses an annealing method of an ultrahigh N austenitic stainless steel cold coil, which comprises the following steps: controlling the temperature range of an annealing heating section to be 500-1050 DEG C, controlling the temperature range of an annealing heat preservation section to be 1080-1120 DEG C, and controlling the treatment time of the annealing heating section and the treatment time of the annealing heat preservation section on the basis of the deformation rate in a hot coil cold rolling process according to the following mode: when the cold rolling deformation rate is 0-20%, controlling the treatment time of the annealing heating section and the treatment time of the annealing heat preservation section to be 1080-1120 DEG C; the treatment time of the heating section is less than or equal to 1 min, and the treatment time of the heat preservation section is 3-8 min; when the cold rolling deformation rate is 21%-30%, the treatment time of a heating section is less than or equal to 5