The raw material of stainless steel 316L (/%: ≤0.03C

≤ l.0Si

≤2.0Mn

≤0.035P

≤0.030S

16~18Cr

12~15Ni

2 ~3Mo) meeting the requirement for production of 00.018 mm ultra-fine wire is successfully produced by 11 3-phases electroslag furnace with lining-bottom argon stirring refining-casting 090 mm bar-electroslag remelting 100kg ingot process flow sheet. During 3 pure iron consumable electrodes arc melting process with slagging material 25CaF2-25Al2O3-50CaO

using AlSiMn alloy and SiCa powder to deoxidize and bottom argon stirring

the required chemical composition of steel is obtained by gradually adding chromium iron

nickel plate and silicon iron

and the liquid is casting to φ90 mm bar then remelting to 100 kg ingot by a φ160 mm electroslag remelting furnace. Results show that the total

oxygen content in electro-slag remelted ingot is (15 ~20) x 10

-6

the average inclusions content is 16. 2 inclusions/mm2

and the 95% inclusions size is less than 5 μm

the inclusion size larger than 10 μm isn' t found that meet the requirement for production of ultra-fine stainless steel wire.