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Title:
STEEL WIRE AND SPRING
Document Type and Number:
WIPO Patent Application WO/2022/259606
Kind Code:
A1
Abstract:
This steel wire is formed of a steel containing 0.5-0.7 mass% of carbon, 1-2.5 mass% of silicon, 0.3-1 mass% of manganese, and 0.5-2 mass% of chromium, the remaining portion being iron and unavoidable impurities. The steel wire has a wire diameter of 0.5-2 mm. The steel wire has a tensile strength of 2000-2700 N/mm2 . The steel has a pearlite structure. The value of (S+5.8885×10-3)/T which is obtained by dividing, by the tensile strength T, a value obtained by adding 5.8885×10-3 to the lattice strain S of the steel is equal to or more than 4.8×10-6. Here, the unit of the tensile strength is N/mm2.

Inventors:
OKADA TAICHI (JP)
WATANABE TAKASHI (JP)
UWANO TAKAFUMI (JP)
GOTO KAZUHIRO (JP)
IZUMIDA HIROMU (JP)
Application Number:
PCT/JP2022/004315
Publication Date:
December 15, 2022
Filing Date:
February 03, 2022
Export Citation:
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Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
C21D8/06; C21D9/02; C22C38/00; C22C38/18; C22C38/52
Domestic Patent References:
WO2018179597A12018-10-04
WO2018230717A12018-12-20
Foreign References:
JP2012117129A2012-06-21
JP2002146479A2002-05-22
JP2020535313A2020-12-03
JP2021183716A2021-12-02
Attorney, Agent or Firm:
KITANO, Shuhei et al. (JP)
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