Title:
STEEL WIRE FOR MECHANICAL STRUCTURAL COMPONENTS
Document Type and Number:
WIPO Patent Application WO/2017/098964
Kind Code:
A1
Abstract:
Provided is a steel wire for mechanical structural components, substantially comprising C: 0.3-0.6 mass%, Si: 0.05-0.5 mass%, Mn: 0.2-1.7 mass%, P: greater than 0 mass% to no more than 0.03 mass%, S: 0.001-0.05 mass%, Al: 0.005-0.1 mass%, and N: 0-0.015 mass%, the balance being iron and unavoidable impurities. The metal structure is composed of ferrite and cementite; the standard deviation σc of the cementite count contained in a 5 × 5 μm area satisfies expression (1) below; and the average particle size of the cementite is 0.5 μm or greater. 1.5 ≤ σc ≤ 4.5 (1), where [C%] indicates the carbon content expressed in mass%.
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Inventors:
SASAKI YUKI
KOCHI TAKUYA
CHIBA MASAMICHI
SAKATA MASAYUKI
KOCHI TAKUYA
CHIBA MASAMICHI
SAKATA MASAYUKI
Application Number:
PCT/JP2016/085371
Publication Date:
June 15, 2017
Filing Date:
November 29, 2016
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
C22C38/00; C22C38/60; C21D8/06; C21D9/52
Domestic Patent References:
| WO2013183648A1 | 2013-12-12 | |||
| WO2016158428A1 | 2016-10-06 | |||
| WO2016190396A1 | 2016-12-01 |
Foreign References:
| JPH0426716A | 1992-01-29 | |||
| JP2001011575A | 2001-01-16 |
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (JP)
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