Method of manufacturing super formable high strength steel...

Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C148S651000, C148S505000, C148S507000

Reexamination Certificate

active

07806998

ABSTRACT:
A super formable high strength thin steel sheet suitable for use in various applications, e.g., automobiles, and a method for manufacturing the thin steel sheet. The thin steel sheet has a composition which comprises 0.010 wt % or less of C, 0.02 wt % or less of Si, 1.5 wt % or less of Mn, 0.03-0.15 wt % or less of P, 0.02 wt % or less of S, 0.03-0.40 wt % of Sol. Al, 0.004 wt % or less of N, 0.005-0.040 wt % of Ti, 0.002-0.020 wt % of Nb, one or both of 0.001-0.02 wt % of B and 0.005-0.02 wt % of Mo, and the balance of Fe and inevitable impurities, wherein the components P, Mn, Ti, Nb and B satisfy the relationship represented by the following Formulae 1-1 and 1-2, depending on a desired tensile strength: Formula 1-1—tensile strength: 35 kg and 40 kg grades 29.1+89.4P(%)+3.9Mn(%)−133.8Ti(%)+157.5Nb(%)+0.18[B(ppm) or Mo(%)] 15=3544.9 Formula 1-2—tensile strength: 45 kg grade 29.1+98.3P(%)+4.6 Mn(%)86.5Ti(%)62.5Nb(%)+0.21 [B(ppm) or Mo(%)]—4550, the components Ti, N, C and Nb satisfy the relationship represented by the following Formula 2: 0.6≦(1/0.65)(Ti−3.43N)/4C≦3.5, and Formula 3: 0.4≦(1/0.35)(Nb/7.75C)≦2.2.

REFERENCES:
patent: 4504326 (1985-03-01), Tokunaga et al.
patent: 5360493 (1994-11-01), Matsuoka et al.
patent: 5690755 (1997-11-01), Yoshinaga et al.
patent: 6316127 (2001-11-01), Ikeda et al.
patent: 6410163 (2002-06-01), Suzuki et al.
patent: 6652670 (2003-11-01), Inoue et al.
patent: 6663725 (2003-12-01), Inoue et al.
patent: 6743306 (2004-06-01), Nakajima et al.
patent: 63-243226 (1988-10-01), None
patent: 2173242 (1990-07-01), None
patent: 5009587 (1993-01-01), None
patent: 5263185 (1993-01-01), None
patent: 5230541 (1993-09-01), None
patent: 20020047573 (2002-06-01), None
patent: 0018976 (2000-04-01), None
patent: 0120051 (2001-03-01), None
patent: 0123624 (2001-04-01), None
patent: 0198552 (2001-12-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method of manufacturing super formable high strength steel... 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 of manufacturing super formable high strength steel..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of manufacturing super formable high strength steel... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4186453

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.