Title:
【発明の名称】車輛用ドアインパクトバー用高強度電縫鋼管およびその製造方法
Document Type and Number:
Japanese Patent JP2546070
Kind Code:
B2
Abstract:
An electric-resistance-welded steel pipe with high strength consists essentially of 0.05 to 0.30 wt.% C, 0.6 to 2.0 wt.% Mn, 0.03 to 0.70 wt.% Si, the balance Fe and inevitable impurities, and comprises a structure having a martensitic phase ratio of 60 to 100 %, and a tensile strength of 120 to 170 kgf/mm<2>. At least one selected from the group consisting of 0.05 wt.% Nb or less, 1.2 wt.% Cr or less, 0.5 wt.% Mo or less, 0.1 wt.% or less, 0.05 wt.% Ti or less and 0.005 wt.% or less can be added to steel.
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Inventors:
MAEDA TATSUO
TAKAMURA TOSHIHIRO
ISHIZAWA YOSHIKAZU
SUGIMOTO JUJI
MORIMOTO YOSHITOSHI
SUGAMASA TETSUAKI
NISHIMURA FUMIHIRO
TAKAMURA TOSHIHIRO
ISHIZAWA YOSHIKAZU
SUGIMOTO JUJI
MORIMOTO YOSHITOSHI
SUGAMASA TETSUAKI
NISHIMURA FUMIHIRO
Application Number:
JP41301790A
Publication Date:
October 23, 1996
Filing Date:
December 25, 1990
Export Citation:
Assignee:
NIPPON KOKAN KK
International Classes:
B23K13/00; C21D6/00; C21D8/10; C21D9/08; C22C38/00; C22C38/04; C22C38/14; C22C38/32; F16L9/02; C21D8/02; (IPC1-7): C22C38/00; B23K13/00; C21D6/00; C21D8/10; C21D9/08; C22C38/14
Domestic Patent References:
| JP4116138A |
Attorney, Agent or Firm:
Ichiichi Shirakawa