Metal treatment – Stock – Ferrous
Patent
1985-10-23
1986-10-07
Stallard, Wayland
Metal treatment
Stock
Ferrous
148 12C, 148 12D, 148 12F, 148328, C21D 946, C21D 702, C21D 714
Patent
active
046157492
ABSTRACT:
A cold rolled dual-phase structure steel sheet having an excellent deep drawability is disclosed, which consists of ferrite phase and low temperature transformation product phase and comprises 0.001-0.008 wt % of C, not more than 1.0 wt % of Si, 0.05-1.8 wt % of Mn, not more than 0.15 wt % of P, 0.01-0.10 wt % of Al, 0.002-0.050 wt % of Nb and 0.0005-0.0050 wt % of B provided that the value of Nb (%)+10B (%) is in a range of 0.010-0.080%, and, if necessary, 0.05-1.00 wt % of Cr and the balance being substantially Fe with inevitable impurities. This steel sheet is manufactured by hot and cold rolling a steel slab with the above chemical composition and continuously annealing the resulting steel sheet in such a manner than the steel sheet is heated and soaked at a temperature from .alpha..fwdarw..gamma. transformation point to 1,000.degree. C. and then cooled at an average cooling rate of not less than 0.5.degree. C./sec but less than 20.degree. C./sec in a temperature range of from the soaking temperature to 750.degree. C., and subsequently at an average cooling rate of not less than 20.degree. C./sec in a temperature range of from 750.degree. C. to not more than 300.degree. C.
REFERENCES:
patent: 3988173 (1976-10-01), Kawano
patent: 4050959 (1977-09-01), Nakaoka et al.
patent: 4062700 (1977-12-01), Hayami et al.
patent: 4339284 (1982-07-01), Hashimoto et al.
patent: 4410372 (1983-10-01), Takahashi et al.
patent: 4426235 (1984-01-01), Sudo et al.
Hashimoto Osamu
Nishida Minoru
Obara Takashi
Satoh Susumu
Suzuki Hideo
Kawasaki Steel Corporation
Stallard Wayland
LandOfFree
Cold rolled dual-phase structure steel sheet having an excellent does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cold rolled dual-phase structure steel sheet having an excellent, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cold rolled dual-phase structure steel sheet having an excellent will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-641517