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.

摘要： 淮钢采用90 t顶底复吹转炉-LF-RH-200 mm×200 mm连铸-连轧工艺流程试生产了2炉Φ60 mm链轨节用钢15B36Cr(/%:0.30～0.37C、0.15～0.30Si、1.20～1.50Mn、≤0.040P、≤0.0505、0.20～0.40Cr、≤0.25Ni、≤0.35Cu、≤0.06Mo、0.0005～0. 0030B)。通过加严影响淬透性化学成分,控制出钢碳≥0.08%,转炉有效挡渣和下渣检测系统控制下渣,LF炉铝粒和电石渣面脱氧,RH最低真空度处理20～30 min,结晶器电磁搅拌、末端电磁搅拌和连铸低过热度保护浇铸等工艺措施,15B36Cr钢的化学成分稳定控制在内控范围内,除了B粗以外,其他类型非金属夹杂物级别全部控制在1.0以内,淬透性控制在较窄的范围内,试制钢种关键技术指标达到客户和预期设计要求。

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