Title:
TUBE STOCK FOR USE IN STABILIZER
Document Type and Number:
Japanese Patent JPH01111848
Kind Code:
A
Abstract:
PURPOSE:To manufacture a tubular stabilizer with high reliability by regulating a difference in wall thickness in a bent part and a temp. in a temp. rise by means of electrification, respectively, at the time of bending a tube stock in which composition and shape are specified. CONSTITUTION:A steel plate having a composition consisting of, by weight, 0.10-0.35% C, <=0.35% Si, 0.30-1.20% Mn, 0.10-0.60% Cr, Ti in an amount 4-10 times the total content of inevitably contained N and O, 0.0005-0.009% B, and the balance Fe with inevitable impurities is subjected to butt seam welding, by which a tube stock which has 12-65mmphi outside diameter and arbitrary length and in which the ratio of wall thickness to outside diameter is regulated to 6-25% is formed. In this tube stock, [(the maximum wall thickness in a bent part)-(the minimum wall thickness in a bent part)]/(wall thickness before bending) is regulated to <=18.0% when this tube stock is bent orthogonally at a bending moment in which inside diameter is practically 4 times the outside diameter, and further, the temp. in the bent tube is regulated so that it is not raised up to >=1110 deg.C when the bent tube is electrified from one end to the other end and resistance heating is applied so that the temp. in the straight run of the tube is practically uniformized to 950 deg.C. By using this tube stock, the tubular stabilizer having high reliability can be manufactured.
Inventors:
OHAMA HIROHISA
SHINODA KENICHI
SHINODA KENICHI
Application Number:
JP26992087A
Publication Date:
April 28, 1989
Filing Date:
October 26, 1987
Export Citation:
Assignee:
NISSHIN STEEL CO LTD
International Classes:
B21D7/00; B60G21/04; B60G21/055; C21D9/08; C22C38/00; C22C38/32; (IPC1-7): B21D7/00; B60G21/04; C21D9/08; C22C38/00; C22C38/32
Domestic Patent References:
| JPS58123858A | 1983-07-23 | |||
| JPS6145688A | 1986-03-05 | |||
| JPS61207548A | 1986-09-13 | |||
| JPS60243248A | 1985-12-03 | |||
| JPS60215719A | 1985-10-29 | |||
| JPS59222529A | 1984-12-14 | |||
| JPS5635751A | 1981-04-08 |
Attorney, Agent or Firm:
Kenji Wada