High strength thick steel plate superior in crack arrestability

Details High strength thick steel plate superior in crack arrestability High strength thick steel plate superior in crack arrestability

2011-03-29

2011-03-29

Ip, Sikyin (Department: 1735)

Metal treatment

Stock

Ferrous

C148S331000, C148S332000, C148S333000, C148S335000, C420S090000, C420S091000, C420S092000, C420S119000, C428S547000, C428S610000

Reexamination Certificate

active

07914629

ABSTRACT:
The present invention provides high strength thick steel plate superior in crack arrestability high in strength, free of deterioration of HAZ toughness, and free of anisotropy, that steel plate containing, by mass %, C: 0.03 to 0.15%, Si: 0.1 to 0.5%, Mn: 0.5 to 2.0%, P: ≦0.02%, S: ≦0.01%, Al: 0.001 to 0.1%, Ti: 0.005 to 0.02%, Ni: 0.15 to 2%, and N: 0.001 to 0.008% and having a balance of iron and unavoidable impurities as chemical components, having a microstructure of a ferrite and/or pearlite structure with bainite as a matrix phase, and having an average circle equivalent diameter of crystal grains with a crystal misorientation angle of 15° or more of 15 μm or less in the regions of 10% of plate thickness from the front and rear surfaces and of 40 μm or less in the other region including the center part of plate thickness.

REFERENCES:
patent: 2003/0217795 (2003-11-01), Asahi et al.
patent: 59-47323 (1984-03-01), None
patent: 61-235534 (1986-10-01), None
patent: 2001-123245 (2001-05-01), None
patent: 2002-241891 (2002-08-01), None
patent: 2003-221619 (2003-08-01), None
patent: 2003-239036 (2003-08-01), None
patent: 2003239036 (2003-08-01), None
patent: 2005-54250 (2005-03-01), None
patent: 2005-097683 (2005-04-01), None
patent: 2005-097694 (2005-04-01), None
patent: 2003-0081050 (2003-10-01), None
O. Engler et al., “A Study of Through-Thickness Texture Gradients in Ro ed Sheets”, Metallurgical and Materials Transactions, vol. 31A, Sep. 2000, pp. 2299-2315.

Affiliated with

Also associated with

Rating

High strength thick steel plate superior in crack arrestability does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High strength thick steel plate superior in crack arrestability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High strength thick steel plate superior in crack arrestability will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2639548