Title:
BRASS-PLATED STEEL WIRE FOR GOLD-PLATED SPRING AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2016/143946
Kind Code:
A1
Abstract:
The present invention relates to a brass-plated steel wire for a gold-plated spring, which is a steel wire used as a material of a gold-plated spring, characterized in that a brass plating layer, which has a zinc content of 30-45% and a copper content of 55-70%, is formed on the surface of the steel wire at a thickness of 0.5-2.0μm, and the density of Fe, among the components of the brass plating layer, is 4% or less. A method for manufacturing a brass-plated steel wire for a gold-plated spring according to the present invention comprises the steps of: primarily dry-drawing a material wire rod such that the same has a diameter of 2.0-4.0mm; heat-treating the primarily drawn steel wire and then secondarily dry-drawing the same such that the same has a diameter of 0.5-1.5mm; successively forming a copper plating layer and a zinc plating layer on the surface of the secondarily drawn steel wire such that the copper content becomes 55-70% and the zinc content becomes 30-45% and then forming a brass plating layer of 2.0-4.0μm through thermal diffusion; and tertiarily drawing the same such that the final wire diameter becomes 0.01-1.0mm and the brass plating layer has a thickness of 0.5-2.0μm.
Inventors:
KIM JONG SUNG (KR)
JUNG MIN JONG (KR)
LIM HAN JUN (KR)
JUNG MIN JONG (KR)
LIM HAN JUN (KR)
Application Number:
PCT/KR2015/004958
Publication Date:
September 15, 2016
Filing Date:
May 18, 2015
Export Citation:
Assignee:
HONGDUK IND CO LTD (KR)
International Classes:
C25D7/06; C25D3/58; C25D5/10; C25D5/50
Foreign References:
| KR101413973B1 | 2014-07-01 | |||
| JPH08209388A | 1996-08-13 | |||
| KR20140102214A | 2014-08-21 | |||
| KR20080028555A | 2008-04-01 | |||
| KR20080077313A | 2008-08-22 |
Attorney, Agent or Firm:
KIM, YOUNG HWAN (KR)
김영환 (KR)
김영환 (KR)
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