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1. (WO2018107474) STEEL WIRE-DRAWING METHOD

Pub. No.:    WO/2018/107474    International Application No.:    PCT/CN2016/110419
Publication Date: Fri Jun 22 01:59:59 CEST 2018 International Filing Date: Sat Dec 17 00:59:59 CET 2016
IPC: B21C 1/02
Applicants: CAI, Sai
蔡赛
Inventors: CAI, Sai
蔡赛
Title: STEEL WIRE-DRAWING METHOD
Abstract:
Disclosed is a steel wire-drawing method, used to drawing a wire rod having a diameter of 4-4.2 mm to 3-3.2 mm. The method comprises: s1, performing primary wire-drawing to reduce the diameter to 3.6-3.65 mm, with a reduction rate being 16.54-16.61%, a drawing speed being 2.3 m/s, and a reduction angle of a drawing die being 5.9-6.1°; s2, performing secondary wire-drawing to reduce the diameter to 3.3-3.35 mm, with a reduction rate being 16.15-16.35%, a drawing speed being 2.7 m/s, and a reduction angle of a drawing die being 7-7.1°; and s3, performing tertiary wire-drawing to reduce the diameter to 3-3.2 mm, with a reduction rate being 15.24-15.31%, a drawing speed being 3.9 m/s, and a reduction angle of a drawing die being 7-7.1°. By controlling the reduction angle, the present invention improves the tensile strength of steel wires, and reduces values of the torsion and bending properties of steel wires.