The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 09, 2010
Filed:
Jul. 22, 2005
Kazuhito Imai, Amagasaki, JP;
Tamotsu Toki, Nishinomiya, JP;
Yukihiro Yoshikawa, Kyoto, JP;
Masaru Takahashi, Amagasaki, JP;
Toshinobu Nishibata, Amagasaki, JP;
Nobusato Kojima, Amagasaki, JP;
Kazuhito Imai, Amagasaki, JP;
Tamotsu Toki, Nishinomiya, JP;
Yukihiro Yoshikawa, Kyoto, JP;
Masaru Takahashi, Amagasaki, JP;
Toshinobu Nishibata, Amagasaki, JP;
Nobusato Kojima, Amagasaki, JP;
Sumitomo Metal Industries, Ltd., Osaka, JP;
Abstract
Hot press forming of a steel material is made possible by coating the surface of the steel material with a plated layer of zinc or a zinc alloy and forming thereon a barrier layer which prevents the vaporization of zinc even when heated to 700-1000° C. Corrosion resistance can also be guaranteed without requiring post treatment, and hot press forming of high tensile steel sheet and stainless steel sheet is made possible. The barrier layer is formed by forming an upper plated layer, by surface oxidation, by contact with an oxidizing agent, by contact with Zn and an oxidizing agent, by anodic electrolysis, by cathodic electrolysis, or by coating with a ZnO sol.