Continuous surface treatment method for steel wire

Abstract

A method to form a phosphate coating on a steel wire, the method including: continuously forming a phosphate coating on a steel wire before being subjected to cold forming; and a descaling of jetting slurry including grit-like abrasive particles onto the steel wire before forming the phosphate coating, thereby producing a new surface on the steel wire. The method can further include a preheating of the steel wire after the descaling and before the coating treatment. The method makes it possible to form a phosphate coating on a steel wire in a short time with high productivity without causing significant forming deterioration on the surface of the steel wire.

1 : A continuous surface treatment method for a steel wire, which is for continuously treating a surface of a steel wire before subjecting the wire to cold forming, the method comprising:
 continuously forming a phosphate coating on the steel wire; and   a descaling of jetting slurry including grit-like abrasive particles onto the surface of the steel wire before forming the phosphate coating, thereby producing a new surface on the surface of the steel wire.   
     
     
         2 : The continuous surface treatment method for a steel wire according to  claim 1 , further comprising a preheating which is performed after the descaling and before the coating treatment, to preheat the steel wire. 
     
     
         3 : The continuous surface treatment method for a steel wire according to  claim 1 , wherein, in the descaling the slurry is jetted at a jetting pressure of 0.2 MPa or more and 0.6 MPa or less. 
     
     
         4 : The continuous surface treatment method for a steel wire according to  claim 2 , wherein, in the descaling, the slurry is jetted at a jetting pressure of 0.2 MPa or more and 0.6 MPa or less.