Title:
METHOD FOR PRODUCING HEAT-TREATED HOLLOW METALLIC MATERIAL EXCELLENT IN CHEMICAL CONVERSION TREATABILITY AT INSIDE FACE
Document Type and Number:
Japanese Patent JP2016199791
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a heat-treated hollow metallic member excellent in chemical conversion treatability by preventing the sticking of a thermally decomposed product generated from an oil component to the inside face of a product after heat treatment and also eliminating deterioration in chemical conversion treatability caused by the thermally decomposed product stuck to the inside face of an un-heated member.SOLUTION: Provided is a method for producing a heat-treated hollow metallic member, while relatively moving a heating device and a cooling device to a hollow metallic member, locally heating a hollow metallic member by the heating device, then cooling the same by the cooling device and performing heat treatment. A gas is made to flow inside the hollow metallic member at 0.1 m/s or higher from the tip part in the relative feeding direction of the hollow metallic member to the heating device and the cooling device toward the rear end part.SELECTED DRAWING: None
Inventors:
MATSUDA HIDEKI
AKIOKA KOJI
UEMATSU KAZUO
AKIOKA KOJI
UEMATSU KAZUO
Application Number:
JP2015081129A
Publication Date:
December 01, 2016
Filing Date:
April 10, 2015
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP
International Classes:
C21D1/74; B21D7/16; C21D9/08
Domestic Patent References:
| JP2007224371A | 2007-09-06 | |||
| JP2004099945A | 2004-04-02 | |||
| JPH0857505A | 1996-03-05 | |||
| JP2007083304A | 2007-04-05 |
Foreign References:
| US20080182118A1 | 2008-07-31 |
Attorney, Agent or Firm:
Patents corporation Blitas
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