CHQ Method for manufacturing stainless steel for cold heading quality wire rod

摘要

A method for producing a stainless steel for CHQ excellent in cold pressure composition is provided. The production method of the present invention is characterized by comprising: an EAF step of preparing molten steel satisfying the JIS G4308 SUSXM7 component range; An AOD process of decarburizing and reducing desulfurizing molten steel prepared in the EAF process; An LT process for modifying non-metallic inclusions in molten steel by adding Ca to molten steel passing through the AOD process in a range of 25 to 1,000 kg per 100 ton of molten steel; C: not more than 0.02%, Si: not more than 0.5%, Mn: not more than 1.0%, S: not more than 0.03%, by weight, by VD vacuum degassing treatment so that C% + N% , Ni: 9.0 to 10.5%, Cr: 17.0 to 19.0%, Cu: 3.0 to 4.0% 0.015% or less of N, 0.025% or less of C + N, 0.025% or less of Ca, the balance Fe and unavoidable impurities; And continuously casting the produced molten steel to produce a cast steel, and then hot rolling the cast steel to produce a wire.