The metallurgical process flowsheet for DY105 steel wire (/%： 0.90C

0. 22Si

0. 24Mn

0.012P

0. 003S

0. 002Ti

adding RE 0. 10) is 40 t EAF- LF- VD- 3t ingot- breakdown 180 mm x 180 mm billet-rolled to Φ6. 5 mm coil- 500℃ lead bath quenched- Cold Drawn. The phenomenon of fracture of DY 105 steel occurs in cold drawing process

and it is obtained by analysis that partial needle-shaped martensite structure and appreciable B-type and TiN inclusions in fractured wire are main reasons to produce cold drawn fracture of wire. With the process measures including modifying Al wire deoxidation to Al wire + Al shot + C powder deoxidation

increasing soft blowing time from 15 min to 20 min

improving rare earth elements adding method and increasing Φ6.5 mm steel wire lead bath time

the phenomenon of wire fracture of the steel in cold drawn process is avoided.