Flat wire and method for production thereof

Abstract

A flat wire ( 3 ) and a saw blade ( 1 ) obtainable from the flat wire ( 3 ) are disclosed. The flat wire ( 3 ) is made of a steel comprising 0.45-0.70 wt.-% of C, 1.2-2.5 wt.-% of Si, 0.2-1.1 wt.-% of Mn, 0.5-1.4 wt.-% of Cr, 0.05-0.40 wt.-% of V, 0.05-0.40 wt.-% of Mo, 0.05-0.40 wt.-% of W, optionally up to 0.4 wt-% of Ni, optionally up to 0.003 wt.-% of Ti, optionally up to 0.05 wt.-% of Nb, balance Fe and unavoidable impurities.

1 . A flat wire made of a steel having a composition, in percent by weight (wt.-%) comprising:
 C 0.45-0.70,   Si 1.2-2.5,   Mn 0.2-1.1,   Cr 0.5-1.4,   V 0.05-0.40,   Mo 0.05-0.40, and   W 0.05-0.40.   
     
     
         2 . The flat wire according to  claim 1 , wherein the flat wire is a flat rolled wire. 
     
     
         3 . The flat wire according to  claim 1 , wherein the flat wire has a width to thickness ratio of at least 3:1. 
     
     
         4 . The flat wire according to  claim 1 , having a thickness of from 0.1 mm to 2 mm. 
     
     
         5 . The flat wire according to  claim 1 , wherein the steel comprises 0.50-0.70 wt.-% C. 
     
     
         6 . The flat wire according to  claim 1 , wherein the steel comprises 1.70-2.50 wt.-% Si. 
     
     
         7 . The flat wire according to  claim 1 , wherein the steel comprises 0.30-0.70 wt.-% Mn. 
     
     
         8 . The flat wire according to  claim 1 , wherein the steel comprises 0.05-0.25 wt.-% V. 
     
     
         9 . The flat wire according to  claim 1 , wherein the steel comprises 0.05-0.25 wt.-% Mo. 
     
     
         10 . The flat wire according to  claim 1 , wherein the steel comprises 0.05-0.25 wt.-% W. 
     
     
         11 . The flat wire according to  claim 1 , wherein the steel comprises 1.10-1.40 wt.-% Cr. 
     
     
         12 . The flat wire according to  claim 1 , wherein the steel comprises 0.004-0.040 wt.-% Nb. 
     
     
         13 . The flat wire according to  claim 1 , wherein the unavoidable impurities P, S, Cu and Al in the composition of the steel are limited to:
 P max 0.020 wt.-%,   S max 0.030 wt.-%,   Cu max 0.05 wt.-%, and   Al max 0.01 wt.-%.   
     
     
         14 - 19 . (canceled) 
     
     
         14 . A method for producing the flat wire according to  claim 1 , the method comprising:
 casting a steel having the composition,   hot rolling the cast material to a wire rod,   and   cold drawing or cold rolling to desired final dimension of the flat wire.   
     
     
         15 . A method according to  claim 14 , further comprising heat treating the cast material. 
     
     
         16 . A method according to  claim 14 , further comprising patenting the wire rod at a temperature of at least 900° C. 
     
     
         17 . A method according to  claim 14 , further comprising cold drawing the wire rod to a wire having an intermediate dimension. 
     
     
         18 . A method according to  claim 14 , further comprising heat treating and/or patenting the wire having an intermediate dimension. 
     
     
         19 . Use of the flat wire according to any one of  claim 1  in the manufacture of a saw blade. 
     
     
         20 . The flat wire according to  claim 1 , further comprising Ni up to 0.4, Ti up to 0.003, Nb up to 0.05. 
     
     
         21 . A method of producing a saw blade comprising:
 removing material along a longitudinal edge of a flat wire according to  claim 1  to form saw teeth along said longitudinal edge of the flat wire, thereby obtaining the saw blade.   
     
     
         22 . A saw blade of a steel, said steel having the following composition, in percent by weight (wt.-%): 
       
         
           
                 
                 
                 
               
                     
                     
                 
                     
                   C 
                   0.45-0.70, 
                 
                     
                   Si 
                    1.2-2.5, 
                 
                     
                   Mn 
                    0.2-1.1, 
                 
                     
                   Cr 
                    0.5-1.4, 
                 
                     
                   V 
                   0.05-0.40, 
                 
                     
                   Mo 
                   0.05-0.40, and 
                 
                     
                   W 
                   0.05-0.40.