High strength part and method for producing the same

Details High strength part and method for producing the same High strength part and method for producing the same

2005-09-15

2010-11-30

Wyszomierski, George (Department: 1793)

Metal treatment

Process of modifying or maintaining internal physical...

Producing or treating layered, bonded, welded, or...

C148S533000, C148S634000, C148S650000

Reexamination Certificate

active

07842142

ABSTRACT:
High-strength parts and a method for producing them can be provided, where such parts exhibit hydrogen embrittlement resistance and strength after high-temperature forming. For example, the atmosphere in a heating furnace can contain less than about 10% hydrogen and/or have a dew point of about 30° C. or less. The amount of hydrogen penetrating a steel sheet during heating can thereby be reduced. After forming, quench hardening in a die assembly and post-working can be performed. Post-working can include shearing followed by re-shearing or compression forming; punching with a cutting blade having a continuously reduced base width; punching with a tool having a curved blade and a protrusion at the tip of the cutting blade, where the curved blade may include a shoulder portion of given radius and/or angle; fusion cutting; etc. Tensile residual stresses after punching can be reduced and resistance to hydrogen embrittlement can be improved.

REFERENCES:
patent: 3774435 (1973-11-01), Wales et al.
patent: 4211584 (1980-07-01), L'Hermite et al.
patent: 4309890 (1982-01-01), Ichikawa et al.
patent: 4437947 (1984-03-01), Saito et al.
patent: 4992113 (1991-02-01), Baldo et al.
patent: 6309482 (2001-10-01), Dorricott et al.
patent: 6410163 (2002-06-01), Suzuki et al.
patent: 2006/0057417 (2006-03-01), Tada et al.
patent: 1 532 641 (1978-11-01), None
patent: 1128915 (1989-01-01), None
patent: 475622 (1992-07-01), None
patent: 06238361 (1994-08-01), None
patent: 07214193 (1995-08-01), None
patent: 10263720 (1998-10-01), None
patent: 11333530 (1999-12-01), None
patent: 2000 301220 (2000-10-01), None
patent: 2002339054 (2002-11-01), None
patent: 2003 138343 (2003-05-01), None
patent: 2003 181549 (2003-07-01), None
patent: 2004 027290 (2004-01-01), None
patent: 2004 083927 (2004-03-01), None
patent: 2004 124221 (2004-04-01), None
patent: 2004 176181 (2004-06-01), None
patent: 20040058830 (2004-07-01), None
patent: WO 97/40196 (1997-10-01), None
patent: WO 2006/006742 (2006-01-01), None
Machine translation of JP 2004-124221, obtained from www4.ipdl.inpit.go.jp.
Office Action of associated Korean Patent Application No. 9-5-2008-056937565.
Japanese language International Search Report for PCT/JP2005/017441 International filing date Sep. 15, 2005 and Priority date Sep. 15, 2004.
Supplementary European Search Report for associated European Patent Application No. 05785864.9.

Affiliated with

Also associated with

Rating

High strength part and method for producing the same 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 part and method for producing the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High strength part and method for producing the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4251835