According to existing metallurgical quality issue for production of non-quenched and tempered steel MnVS series including low yield of sulfur

poor casting characteristics and low qualified ratio of steel products in nondestructive testing

with stable sulfur wire feeding speed 80 ~ 100 m/min

using premelted refining slag

slag basicity ≥3. 0 by adding lime in refining and optimizing casting and rolling parameters etc. the average yield of sulfur is up to 84%

carbon segregation extent decreases

first qualified ratio of macro-

micro-structure and heading upsetting of products is respectively up to 100%

99. 10% and 100%

the products quality and comprehensive properties all meet the requirement of user.