The production flowsheet of φ5 mm coil of stainless steel 0Crl3 is 60t AOD-LF-150 mm x 150 mm casting billet-rolling process. By the optimizing processes including increasing the AOD top lance blowing flow rate from (70 + 50) m

3

/min to (95 +65) m

3

/min

controlling slag basicity 3.0~4.0 in oxidizing period and end temperature 1670~1710℃

increasing lime quality

reducing tap to tap time and decreasing carbon pickup in process ； controlling suitable nitrogen-argon switching to properly decrease blowing nitrogen amount and realize in reduction low nitrogen control and argon balance use； and modifying the elliptic taphole to round taphole as a result decreased the tap to tap time from 180 s to 100 s so as to decrease the nitrogen increment in process

the steel 0Cr13 [C

]

decreases to ≤0.020% form original 0.025%

[N

]

decreases to ≤0.010% form original 0.020% and the [C+N

]

is ≤0.035%

and the tensile strength of the wire could control to less than 500 MPa.