Non-Metallic Inclusions Control for High Strength Anti-HIC X65 Tube Steel
The hot metal fed converter in Panzhihua Steel Company is characterized by high sulfur content of 0.085% and high phosphorus content of 0.133%. Under this condition, some technologies like control of sulfur and T[O] content, ladle slag optimization, calcium treatment and protective casting were used in practice, and the desired result of T[O] as low as 0.0014% and sulfur content of 0.0023%was achieved, which met the cleanness requirements by anti-HIC X65 tube steel. With the help of inclusion control technology, grade of inclusions in as-cast steel was less than 0.5. In addition, total amount of inclusions was only 0.0044% which dispersed in slab in form of small spherical particle.
Jimmy (C.M.) Kao, Wen-Pei Sung and Ran Chen
J. Wang et al., "Non-Metallic Inclusions Control for High Strength Anti-HIC X65 Tube Steel", Advanced Materials Research, Vols. 581-582, pp. 1062-1067, 2012