Method of producing steel wires each having very small...

Details Method of producing steel wires each having very small... Method of producing steel wires each having very small...

C - Chemistry, Metallurgy

21

D

C21D 8/06 (2006.01)

Patent

CA 2065310

The present invention is concerned with a method of producing steel wires each having a very small diameter of 0.4 mm or less and a tensile strength of 360 kgf/mm or more wherein a steel material having a composition comprising C: 0.90 to 1.10% by weight, Si: 0.4% or less by weight, Mn: 0.5% or less by weight, Cr: 0:10 to 0.30% by weight and a balance of iron an unavoidable impurities is subjected to diffusion treatment as desired, thereafter, the steel material is subjected to hot rolling, the hot- rolled steel wire is subjected to drawing, subsequently,the resultant steel rod having a smaller diameter si subjected to a final patenting treatment to give said rod a strength of 140 to 160 kgf/mm, and thereafter, it is subjected to drawing with a true strain of 3.50 or more using a die having a die approach angle of 8 to 12 degrees.

a présente invention concerne une méthode pour produire des fils d'acier caractérisés par un très petit diamètre, de 0,4 mm ou moins, et d'une résistance à la traction de 360 kgf/mm.

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