Title:
INVAR ALLOY WIRE EXCELLENT IN STRENGTH AND TURNING CHARACTERISTICS AND METHOD FOR PRODUCTION THEREOF
Document Type and Number:
WIPO Patent Application WO/2003/025239
Kind Code:
A1
Abstract:
An invar alloy wire, characterized in that it has a chemical composition in wt %: C: 0.20 to 0.40, Si: ≤ 0.8 %, Mn: ≤ 1.0 %, P: ≤ 0.050 %, S: ≤ 0.015 %, Cu: ≤ 1.0 %, Ni: 35 to 40 %, Cr: ≤ 0.5 %, Mo: 1.5 to 6.0 %, V: 0.05 to 1.0 %, O: ≤ 0.15 %, N: ≤ 0.03 %, balance: Fe and inevitable impurities, with the proviso that Mo&sol V ≥ 1.0 and (0.3Mo &plus V) ≥ 4C, and exhibits average coefficients of linear thermal expansion in the ranges of 20 to 230&ring C and 230 to 290&ring C of 3.7 X 10−6 or less and 10.8 X 10−6 or less, respectively. The invar alloy wire is improved in the combination of low thermal expansion characteristics, strength and turning characteristics, which results in the reduction of the cost required for the construction of steel towers when it is used for a power transmission line.
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Inventors:
SHIMIZU TETSUYA
NODA TOSHIHARU
HARADA EIJI
NISHIKAWA TAICHIRO
KITAMURA SHINICHI
NODA TOSHIHARU
HARADA EIJI
NISHIKAWA TAICHIRO
KITAMURA SHINICHI
Application Number:
PCT/JP2002/009243
Publication Date:
March 27, 2003
Filing Date:
September 11, 2002
Export Citation:
Assignee:
DAIDO TOKUSHUKOU KABUSHIKI KAI (JP)
SUMITOMO ELECTRIC INDUSTRIES (JP)
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
C21D8/06; C22C38/00; C22C38/44; C22C38/46; C22C38/54; (IPC1-7): C22C38/00; C21D8/06; C22C38/46; C22C38/54
Foreign References:
| EP0723025A1 | 1996-07-24 | |||
| JPH08199308A | 1996-08-06 | |||
| JPH08100242A | 1996-04-16 |
Attorney, Agent or Firm:
Yoshida, Kazuo (1-3 Tsubaki-cho, Nakamura-k, Nagoya-shi Aichi, JP)
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