Among many factors influencing steel resistance to hydrogen induced cracking, the sulfur content in the metal and steel modification technology with calcium are of particular importance. In assessing the impact of process parameters on HIC resistance many authors do not consider their effect on production process efficiency and other quality indicators. The combined effect of calcium and rare earth metals on hot-rolled steel quality is described (with respect to steel HIC resistance, and contamination of metal by nonmetallic inclusions) in this paper. Formation of nonmetallic inclusions containing calcium and rare earth metals is described, and nonmetallic inclusions in the metal with different versions of modification are analyzed. The optimum amount of calcium and cerium required for obtaining stable results for HIC resistance in low-carbon micro-alloyed steels while retaining good rolled steel surface quality is determined.
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Translated from Metallurg, Vol. 62, No. 10, pp. 27–35, October, 2018.
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Mursenkov, E.S., Kudashov, D.V., Kislitsa, V.V. et al. Features of Technology for Pipe Steel Modification with Calcium and Cerium with Specification for Resistance to H2S-MEDIA. Metallurgist 62, 994–1005 (2019). https://doi.org/10.1007/s11015-019-00730-0
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DOI: https://doi.org/10.1007/s11015-019-00730-0