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Title:
STEEL WIRE MATERIAL, AND METHODS RESPECTIVELY FOR PRODUCING STEEL WIRE MATERIAL AND STEEL WIRE
Document Type and Number:
WIPO Patent Application WO/2017/169667
Kind Code:
A1
Abstract:
A steel wire material comprising 0.5 to 0.9% by mass of C, 1.5 to 2.5% by mass of Si, 0.1 to 0.6% by mass of Mn, 0.05% by mass or less (excluding 0% by mass) of P, 0.05% by mass or less (excluding 0% by mass) of S, 1.2 to 2.5% by mass of Cr, 0.2 to 0.6% by mass of V and a remainder made up by Fe and unavoidable impurities, wherein the largest diameter of particles of a spheroidized carbide is 100 nm or less in a portion of the steel wire material which is located at a depth of 0.5 mm from the surface of the steel wire material, the areal fraction of particles of the spherical carbide, each of which has a longer diameter of 100 nm or less, relative to the whole area of the carbide is 90% or more, the largest diameter of particles of a V-containing carbonitride is 20 nm or less, and the number density of particles of the V-containing carbonitride, each of which has a longer diameter of 20 nm or less, is 30 particles/μm2 or more.

Inventors:
MASUDA TOMOKAZU
FUKUZUMI YUICHI
Application Number:
PCT/JP2017/009780
Publication Date:
October 05, 2017
Filing Date:
March 10, 2017
Export Citation:
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Assignee:
KOBE STEEL LTD (JP)
International Classes:
C22C38/00; C21D8/06; C21D9/52; C22C38/60
Foreign References:
JP2000169937A2000-06-20
US20150259771A12015-09-17
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (JP)
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