Abstract
In sheets of low-alloy pipe steels with high purity by harmful impurities and non-metallic inclusions, the nucleation and propagation sites of hydrogen-induced cracking (HIC) are extended segregation bands of increased hardness in the axial zone, with sections consisting of high-carbon structures. The use of intensive cooling after controlled rolling from the austenitic region to the bainitic transformation temperatures and a decrease in the concentration of liquor carbon and manganese in steel helps to increase the sheet resistance to HIC due to reducing central segregation heterogeneity.
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Funding
The study was carried out with the financial support of the Russian Foundation for Basic Research in the framework of the scientific project no. 19-08-00258.
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Translated by S. Avodkova
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Kholodnyi, A.A. Resistance Increase to Hydrogen-Induced Sheet Cracking for Gas and Oil Pipes Based on the Structure Formation Control in the Central Segregation Zone. Steel Transl. 50, 53–61 (2020). https://doi.org/10.3103/S0967091220010052
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DOI: https://doi.org/10.3103/S0967091220010052