Analysis results show that the center segregation of continuous casting billet is serious

easy to cause cup and cone fracture when the rod is drawn； the non-metallic inclusions in the wire rod cause the wire fracture due to the stress when the wire rod is pulled out and twisted; if the content of O and N in steel is too high

the strength and hardness of steel will increase

and the toughness will decrease； reasonable coiling temperature and cooling rate can ensure the ideal micro structure o£ the wire rod. By controlling [O

]

≤20 X 10

-6

N

]

≤40 X 10

-6

costing liquid superheating ≤25℃

rolling billet heating at 1100~1170 ℃ and coiling at 910~93O℃ etc process measures the drawing fracture is avoided.