METHOD FOR PRESS WORKING, PLATED STEEL PRODUCT FOR USE THEREIN AND METHOD FOR PRODUCING THE STEEL PRODUCT

Title:

METHOD FOR PRESS WORKING, PLATED STEEL PRODUCT FOR USE THEREIN AND METHOD FOR PRODUCING THE STEEL PRODUCT

Document Type and Number:

WIPO Patent Application WO/2003/035922

Kind Code:

A1

Abstract:

A steel product for use in hot press working which comprises a steel base product, a zinc or zinc alloy plating layer formed on the surface thereof and, formed on the Zn plating layer, a barrier layer capable of preventing the vaporization of zinc even when heated to 700 to 1000°C. The barrier layer can be formed by an upper layer plating method, a surface oxidation method, an oxidizing agent contacting method, a method of contacting a Zn ion and an oxidizing agent, an anode electrolysis method, a cathode electrolysis method or a ZnO sol application. The steel product can be subjected to hot press working without suffering oxidation of its surface, and needs no after−treatment for securing corrosion resistance. The above technique can be applied to a high tensile steel plate and a stainless steel plate.

Inventors:

IMAI KAZUHITO (JP)
TOKI TAMOTSU (JP)
YOSHIKAWA YUKIHIRO (JP)
TAKAHASHI MASARU (JP)
NISHIBATA TOSHINOBU (JP)
KOJIMA NOBUSATO (JP)

Application Number:

PCT/JP2002/010972

Publication Date:

May 01, 2003

Filing Date:

October 23, 2002

Export Citation:

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Assignee:

SUMITOMO METAL IND (JP)
IMAI KAZUHITO (JP)
TOKI TAMOTSU (JP)
YOSHIKAWA YUKIHIRO (JP)
TAKAHASHI MASARU (JP)
NISHIBATA TOSHINOBU (JP)
KOJIMA NOBUSATO (JP)

International Classes:

C21D8/00; C23C2/06; C23C2/26; C23C2/28; C23C8/02; C23C16/455; C23C22/53; C23C28/00; C23C28/02; C25D5/10; C25D9/10; C25D11/34; (IPC1-7): C23C2/06; C23C2/28; C25D9/10; C25D11/34; C23C22/53; C21D8/00

Foreign References:

JP2000054161A	2000-02-22
JPH02190483A	1990-07-26
JP2000038640A	2000-02-08
JPH02263954A	1990-10-26
JPH06179922A	1994-06-28
JPH06287686A	1994-10-11

Other References: