Method for manufacturing brass-plated steel wire and brass-plated steel wire

Patent metadata

Field	Value
Publication number	US-9579704-B2
Application number	US-201214358273-A
Country	US
Kind code	B2
Filing date	Nov 8, 2012
Priority date	Nov 15, 2011
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

Provided is a method for manufacturing a brass-plated steel wire in which improvement in the quality of the brass-plated steel wire and energy saving in the manufacturing process are balanced and a brass-plated steel wire obtained by the method.
The method is a method for manufacturing a brass-plated steel wire comprising a plating process in which a steel wire rod is brass plated and a final wire drawing process in which the obtained brass-plated steel wire rod is subjected to a final drawing. The method includes a zinc oxide removing process in which the amount of zinc oxide on the surface of the brass-plated steel wire rod is made smaller than 50 mg/m 2 before the final wire drawing process.

First claim

The invention claimed is:

1. A method for manufacturing a brass-plated steel wire, comprising:
brass-plating a steel wire rod;
removing zinc oxide from the surface of the brass-plated steel wire rod by a pickling treatment, wherein the amount of zinc oxide remaining after the removing of the zinc oxide is smaller than 50 mg/m 2 ; and
final drawing the obtained brass-plated steel wire rod after the removing of the zinc oxide;
wherein a cleaning liquid used for the pickling treatment is a phosphoric acid solution; and
wherein the concentration of the phosphoric acid solution and acid treatment time satisfy the relationship represented by the following expression: 72 (g/L·s)≧phosphate concentration (g/L)×treatment time (s)>5.0 (g/L·s).

2. The method for manufacturing a brass-plated steel wire according to claim 1 , wherein
the brass-plating of the steel wire rod comprises a process in which sequentially plating copper and zinc, and thereafter performing a thermal treatment.

3. The method for manufacturing a brass-plated steel wire according to claim 1 , wherein
the amount of zinc oxide on the surface of the brass-plated steel wire rod after the removing of the zinc oxide is not smaller than 10 and is smaller than 50 mg/m 2 .

4. The method for manufacturing a brass-plated steel wire according to claim 1 , wherein
the diameter of the brass-plated steel wire after the final drawing process is not larger than 0.6 mm.

5. The method for manufacturing a brass-plated steel wire according to claim 1 , wherein
the thickness of a brass-plated layer on the surface of the brass-plated steel wire after the final drawing process is not larger than 20 μm.

6. The method for manufacturing a brass-plated steel wire according to claim 1 , wherein
the final drawing is wet drawing.

7. A brass-plated steel wire manufactured by the method for manufacturing a brass-plated steel wire according to claim 1 .

Assignees

• Bridgestone Corp

Inventors

• Shizuku Takahisa

Classifications

• C25D7/0607

  Wires · CPC title

• B21C1/003

  Drawing materials of special alloys so far as the composition of the alloy requires or permits special drawing methods or sequences · CPC title

• C25D5/48

  After-treatment of electroplated surfaces · CPC title

• Y10T428/12972

  Containing 0.01-1.7% carbon [i.e., steel] · CPC title

• D07B1/06 Primary

  Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core · CPC title