Title:
中空部材及びその製造方法
Document Type and Number:
Japanese Patent JP6796472
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a hollow member having an increased fatigue life by imparting enough corrosion resistance to prevent corrosion pits at a bead cut part on the inner surface of a steel pipe.SOLUTION: A hollow member has a composition comprising, in mass%, C: 0.20%-0.40%, Si: 0.50%-1.5%, Mn: 0.3%-1.5%, Cr: 0.1%-1.6%, P: 0.020% or less, S: 0.010% or less, Cu: 0.1%-0.5%, Ni: 0.1%-0.5%, Nb: 0.02%-0.5%, Ca: 0.005% or less, B: 0.0005%-0.0050%, Al: 0.005%-0.1%, N: 0.010% or less, Ti: 0.02%-0.1% with the balance being Fe and inevitable impurities. Preferably, the hollow member further has at least one selected from V: more than 0 to 0.5% and Mo: more than 0 to 0.5%. The hollow member has a hardness of 450Hv or more. The hollow member is used as a hollow stabilizer.SELECTED DRAWING: None
Inventors:
Koji Osamu
Makoto Akizuki
Susumu Fujiwara
Makoto Akizuki
Susumu Fujiwara
Application Number:
JP2016239128A
Publication Date:
December 09, 2020
Filing Date:
December 09, 2016
Export Citation:
Assignee:
Nippon Steel Corporation
Nippon Jojo Co., Ltd.
Nippon Steel Plated Steel Pipe Co., Ltd.
Nippon Jojo Co., Ltd.
Nippon Steel Plated Steel Pipe Co., Ltd.
International Classes:
C22C38/00; B60G21/055; C21D8/06; C21D9/08; C22C38/54
Domestic Patent References:
| JP8041535A | ||||
| JP2009235499A | ||||
| JP2009203492A | ||||
| JP11189843A |
Foreign References:
| WO2017056384A1 | ||||
| WO2018079398A1 |
Attorney, Agent or Firm:
Michiharu Soga
Kazuhiro Oyaku
Satoshi Iino
Kazuhiro Oyaku
Satoshi Iino