Inclusion Control of Oil Drilling Steel SAE4137
In consideration of inclusion control in smelting drilling steel SAE4137 by convert process, the software FACTSAGE is applied on the deoxidation technology, composition of ladle slag and calcium treatment technology. The tests show that the deoxidation technology is reasonable and the oxygen content of molten steel is not more than 5×10-6 and 3.2×10-6 on average. The inclusion of bar is less and like a ball. The effect of calcium treatment is good. The inclusion is transformed in refining process, the absorbing ability to inclusion of ladle slag is strong. The level of any type of inclusion is not more than 1.5. The mechanical performance of SAE4137 bar meets the requirements, and the inclusion control technology does not influence the mechanical performance of bars.
Jimmy (C.M.) Kao, Wen-Pei Sung and Ran Chen
L. Chen et al., "Inclusion Control of Oil Drilling Steel SAE4137", Advanced Materials Research, Vols. 581-582, pp. 861-867, 2012