关键词: 链轨节用钢15B36&, 90 t顶底复吹转炉-LF-RH-CC I艺流程 试制

Abstract: The Φ60 mm 15B36Cr steel two furnace for Track Link (/% : 0.30 ~0.37C、0.15 〜0.30Si、1.20 ~ 1.50Mn、≤ 0. 040P、 ≤ 0.050S、0.20 ~ 0.40Cr、≤ 0. 25Ni、≤ 0.35Cu、≤ 0.06Mo、0.0005 - 0.0030B) was produced by 90 t LD with top-bottom blowing-LF-RH- 200 mm x200 mm billet concasting-continuous rolling process at Huaigang Special Steel. With more narrow chemical constituents influencing hardenability, controlling LD end [C] ≥ 0.08% and roughing slags amount using effectively slag stopping technology and detecting system of roughing slags, diffusion deoxidation of LF using aluminum particle and carbide, treating for 20 ~ 30 min in the minimum vacuum degree of RH, shielding casting with mold electromagnetic stirring and final electromagnetic stirring and by low superheat pouring, the examination results show that the chemical constituents of steel 15B36Cr is stable, except B heavy inclusion, the rating of other inclusion in steel is no more than 1.0, the hardenability band is more narrow, and the key technical indexs of test steel satisfy the requirements of customer and expectation.