HIGH-STRENGTH ULTRAFINE STEEL WIRE WITH EXCELLENT WORKABILITY IN STRANDING, AND PROCESS AND APPARATUS FOR PRODUCING THE SAME

Title:

HIGH-STRENGTH ULTRAFINE STEEL WIRE WITH EXCELLENT WORKABILITY IN STRANDING, AND PROCESS AND APPARATUS FOR PRODUCING THE SAME

Document Type and Number:

WIPO Patent Application WO/1992/008817

Kind Code:

A1

Abstract:

A high-strength ultrafine steel wire with excellent workability in stranding, which comprises, by weight, 0.85 to 1.10 % of carbon, 0.10 to 0.70 % of silicon, 0.20 to 0.60 % of manganese, 0.10 to 0.60 % of chromium, 0.005 % or less of aluminum, and further, if necessary, 0.10 to 2.00 % of nickel or/and 0.10 to 3.00 % of cobalt, and the balance of iron and inevitable impurities; is provided with a brass plating layer; and has a diameter of 0.1 to 0.4 mm, a tensile strength of 400 kgf/mm?2¿ or above, a depth of an indentation on the surface of the brass plating layer of 2 $g(m)m or less, a distance between the indentations of 50 $g(m)m or less and an area rate of the indentations of 10 to 80 %. A process and an apparatus for producing said wire by subjecting the material of the steel wire to patenting, brass plating and drawing, followed by shot peening of air blasting type under tensions.

Inventors:

TARUI TOSHIMI (JP)
SASAKI SYOJI (JP)
TASHIRO HITOSHI (JP)
SATO HIROSHI (JP)

Application Number:

PCT/JP1991/001582

Publication Date:

May 29, 1992

Filing Date:

November 19, 1991

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)

International Classes:

C21D7/06; C21D8/06; C22C38/18; (IPC1-7): B24C1/10; C21D7/06; C22C38/18; C22C38/30; C22C38/40; C22C38/52

Foreign References:

JPH02263951A	1990-10-26
JPS62256950A	1987-11-09
JPS62109925A	1987-05-21
JPS5610522Y2	1981-03-10
JPS5075933A	1975-06-21

Other References: