Metal treatment – Compositions – Heat treating
Patent
1981-05-28
1983-01-11
Skiff, Peter K.
Metal treatment
Compositions
Heat treating
148 12D, 148 36, C21D 806, C21D 948
Patent
active
043680844
ABSTRACT:
Non-ageing cold rolled steel sheets having a very excellent formability are produced by hot rolling a steel consisting of not more than 0.008% of C, not more than 0.20% of Si, 0.04-0.30% of Mn, not more than 0.03% of P, 0.01-0.10% of Al, a content of Al being more than N%.times.4, not more than 0.02% of S, not more than 0.01% of N, 0.01-0.07% of Nb, a content of Nb being C%.times.3-{C%.times.8+0.02}%, and the remainder being substantially Fe, at a total reduction of not less than 90%, a rolling speed of not less than 40 m/min in the finishing rolling and a finishing temperature of not lower than 830.degree. C., coiling the hot rolled strip at a temperature of 600.degree.-800.degree. C., cold rolling the coiled strip following a conventional manner to obtain a cold rolled strip having final gauge and then continuous annealing or hot-dip galvanizing the cold rolled strip within a temperature range of 700.degree.-900.degree. C. for 10 seconds-5 minutes.
REFERENCES:
patent: 3988174 (1976-10-01), Kawano
patent: 4046601 (1977-09-01), Hook
patent: 4339284 (1982-07-01), Hashimoto et al.
Hashimoto Osamu
Irie Toshio
Sato Susumu
Kawasaki Steel Corporation
Skiff Peter K.
LandOfFree
Method for producing cold rolled steel sheets having a noticeabl does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing cold rolled steel sheets having a noticeabl, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing cold rolled steel sheets having a noticeabl will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-777355