PRODUCTION DEVELOPMENT OF HOT-ROLLED COILS OF STEEL GRADE X52M FOR FURTHER MANUFACTURING OF PIPES IN ACCORDANCE WITH API-5L AT ROLLING "1700" PJSC "ILYICH IRON AND STEEL WORKS"
Journal Title: Вісник Кременчуцького національного університету імені Михайла Остроградського - Year 2018, Vol 1, Issue 112
Abstract
Purpose. The article aims to develop the manufacturing process and production of hot-rolled coils of steel grade X52M by the method of thermomechanical controlled rolling at rolling mill 1700 facilities for further manufacturing of electric-welded pipes in accordance with API-5L. Methodology. The technology has been developed applying the general requirements for rolled products production by the method of thermomechanical controlled rolling applying the mathematical model of the rolling technological process. Findings. At rolling mill 1700 facilities, PJSC “Ilyich Iron and Steel Works”, for the first time the technology has been developed and the batch of hot-rolled coils (8x1260mm) of steel grade X52M has been produced by the method of thermomechanical controlled rolling for further manufacturing of electric-welded pipes in accordance with API-5L. This paper confirms the advantages of the thermomechanical rolling method due to special features of the chemical composition and lower strength level during the production in comparison to other rolling methods, and the possibility to apply this method at the equipment that was not designed for manufacturing of products of such strength categories. The positive influence of Nb on microstructure forming and rolling products properties has been confirmed with thermomechanical rolling method. Originality. Additionally, during the production, the controlled air cooling of coils has been applied up to 450 oC after coiling. This ensures the reduction of air scale layer thickness and improves the surface quality, including the surface quality during further manufacturing of electric-welded pipes. Practical value. The developed technology makes it possible to ensure the production of coils which meet the present-day world requirements and meet the demands of domestic and foreign producers of electric-welded pipes. Сonclusions. There have been determined next stages of the research to improve the quality and for further development of rolled products production for manufacturing of electric-welded pipes in accordance with API-5L.
Authors and Affiliations
O. Kurpe, V. Kukhar, О. Shebanits
Keywords
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- EP ID EP660503
- DOI 10.30929/1995-0519.2018.5.65-74
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