Method of making cold rolled dual phase steel sheet

Details Method of making cold rolled dual phase steel sheet Method of making cold rolled dual phase steel sheet

2011-06-14

2011-06-14

Yee, Deborah (Department: 1733)

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C148S651000, C148S652000, C148S533000

Reexamination Certificate

active

07959747

ABSTRACT:
A steel sheet having (a) a dual phase microstructure with a martensite phase and a ferrite phase and (b) a composition containing by percent weight: 0.01≦C≦0.2; 0.3≦Mn≦3; 0.05≦Si≦2; 0.2≦Cr+Ni≦2; 0.01≦Al≦0.10; 0.0005≦Ca≦0.01, with the balance of the composition being iron and incidental ingredients. Also, the steel sheet is made by a batch annealing method, and has a tensile strength of at least approximately 400 megapascals and an n-value of at least approximately 0.175.

REFERENCES:
patent: 3837894 (1974-09-01), Tucker
patent: 4072543 (1978-02-01), Coldren et al.
patent: 4361448 (1982-11-01), Sippola
patent: 4376661 (1983-03-01), Takechi et al.
patent: 4394186 (1983-07-01), Furukawa
patent: 4398970 (1983-08-01), Marder
patent: 4436561 (1984-03-01), Takahashi et al.
patent: 4437902 (1984-03-01), Pickens et al.
patent: 4609410 (1986-09-01), Hu
patent: 4615749 (1986-10-01), Satoh et al.
patent: 4708748 (1987-11-01), Satoh et al.
patent: 4770719 (1988-09-01), Hashiguchi et al.
patent: 4854976 (1989-08-01), Era et al.
patent: 5312493 (1994-05-01), Masui et al.
patent: 5328528 (1994-07-01), Chen
patent: 5454887 (1995-10-01), Fukui
patent: 5470403 (1995-11-01), Yoshinaga et al.
patent: 6143100 (2000-11-01), Sun
patent: 6210496 (2001-04-01), Takagi et al.
patent: 6221179 (2001-04-01), Yasuhara et al.
patent: 6312536 (2001-11-01), Omiya
patent: 6423426 (2002-07-01), Kobayashi et al.
patent: 6440584 (2002-08-01), Nagataki et al.
patent: 6537394 (2003-03-01), Osawa et al.
patent: 6641931 (2003-11-01), Claessens
patent: 6666932 (2003-12-01), Funakawa et al.
patent: 6673171 (2004-01-01), Hlady
patent: 6676774 (2004-01-01), Matsuoka et al.
patent: 6702904 (2004-03-01), Kami et al.
patent: 6706419 (2004-03-01), Yoshinaga et al.
patent: 6709535 (2004-03-01), Utsumi et al.
patent: 6726782 (2004-04-01), Nakai et al.
patent: 6811624 (2004-11-01), Hoydick
patent: 6814819 (2004-11-01), Matsuoka et al.
patent: 6818074 (2004-11-01), Matsuoka et al.
patent: 6869691 (2005-03-01), Nagataki et al.
patent: 6982012 (2006-01-01), Nomura et al.
patent: 7090731 (2006-08-01), Kashima et al.
patent: 7118809 (2006-10-01), Utsumi
patent: 7311789 (2007-12-01), Hoydick
patent: 7381478 (2008-06-01), Yokoi et al.
patent: 7396420 (2008-07-01), Matsuoka et al.
patent: 7442268 (2008-10-01), Sun
patent: 7527700 (2009-05-01), Kariya et al.
patent: 7534312 (2009-05-01), Yoshinaga et al.
patent: 7553380 (2009-06-01), Ikeda et al.
patent: 7608155 (2009-10-01), Sun
patent: 2003/0041932 (2003-03-01), Tosaka et al.
patent: 2003/0129444 (2003-07-01), Matsuoka
patent: 2004/0003774 (2004-01-01), Moore
patent: 2004/0035500 (2004-02-01), Ikeda et al.
patent: 2004/0047756 (2004-03-01), Rege et al.
patent: 2004/0074573 (2004-04-01), Funakawa et al.
patent: 2004/0118489 (2004-06-01), Sun
patent: 2004/0238080 (2004-12-01), Vandeputte et al.
patent: 2004/0238082 (2004-12-01), Hasegawa et al.
patent: 2005/0016644 (2005-01-01), Matsuoka et al.
patent: 2005/0019601 (2005-01-01), Matsuoka et al.
patent: 2006/0144482 (2006-07-01), Moulin
patent: 2006/0191612 (2006-08-01), Yoshida et al.
patent: 2007/0003774 (2007-01-01), McDaniel
patent: 2007/0144633 (2007-06-01), Kizu et al.
patent: 2009/0071574 (2009-03-01), Sun
patent: 2009/0071575 (2009-03-01), Sun
patent: 2009/0242085 (2009-10-01), Ikeda et al.
patent: 2005200300 (2005-01-01), None
patent: 0969112 (2000-01-01), None
patent: 0969112 (2000-01-01), None
patent: 1191114 (2001-02-01), None
patent: 1291448 (2003-03-01), None
patent: 1338667 (2003-08-01), None
patent: 1431407 (2004-06-01), None
patent: 1666622 (2004-09-01), None
patent: 54033218 (1979-03-01), None
patent: 55100934 (1980-08-01), None
patent: 56013437 (1981-02-01), None
patent: 58058264 (1983-04-01), None
patent: 61045788 (1986-03-01), None
patent: 61045892 (1986-03-01), None
patent: 08-246097 (1996-09-01), None
patent: 10-251794 (1998-09-01), None
patent: 2000239791 (2000-09-01), None
patent: 2000336455 (2000-12-01), None
patent: 2001089811 (2001-04-01), None
patent: 2001-220648 (2001-08-01), None
patent: 2004059026 (2004-07-01), None
Steel and Heat Treatment, Second Edition, Karl-Erik Thelning, Head of Research and Development Smedjebacken-Boxholm Stal AB, Sweden; Butterworths, printed in Great Britain by Mackagys of Chatham Ltd, Kent; pp. 436-437, 1984.
U.S. Steel—Automotive Center—Comparison of Mechanical Properties; http://www.ussautomotive.com/auto/tech/mech—properties.htm, copyright 2005.
Resistance Spot Welding of Galvanized Steel: Part II. Mechanisms of Spot Weld Nugget Formation; S. A. Gedeon and T. W. Eagar; Metallurgical Transactions B; vol. 17B, Dec. 1986 pp. 887-901; Manuscript submitted Aug. 15, 1985.
Structural Steels; Effect of Alloying Elements and Structure on the Properties of Low-Carbon Heat-Treatable Steel; V. A. Mayshevskii, T. G. Semicheva, and E. I. Khlusova; Translated from Metallovedenie I Termischeskaya Obrabotka Metallov, No. 9, pp. 5-9, Sep. 2001.
What Happens to Steel During Heat Treatment? Part One: Phase Transformations by Daniel H. Herring, Apr. 9, 2007; http://www.industrialheating.com/CDA/Articles/Column/BNP—GUID—9-5-2006—A—10000000000000083813.

Affiliated with

Also associated with

Rating

Method of making cold rolled dual phase steel sheet 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 making cold rolled dual phase steel sheet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making cold rolled dual phase steel sheet will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2682921