Development of Rolled Product Manufacturing Technology for Pipes with High Deformation Capacity

Barykov, A. M.; Степанов, П. П.; Il’inskii, V. I.; Golovin, S. V.; Chervonnyi, A. V.; Éfron, L. I.; Bagmet, O. A.; Matrosov, M. Yu.

doi:10.1007/s11015-020-00943-8

Cited by 1 publication

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“…Steels with rather high carbon content are used for casing pipes and tubings (in comparison with gas and oil line pipes), what is explained by high requirements to their strength parameters as well as necessity to obtain rather low V т /V в relationship. It is very important to provide small axial segregation and high steel cleanness for non-metallic inclusions in manufacture of rolled products for casing pipes and tubings [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Development of rolling procedures for pipes of K55 strength class at the laboratorial mill

Adigamov¹,

Baraboshkin²,

Mishnev³

et al. 2022

cisisr

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Experimental results of physical simulation of the manufacturing technology of coiled rolled strip for pipes of K55 strength class (API SCT) at the laboratorial mill are presented. This manufacturing process includes hot rolling with accelerated cooling and coiling at high temperature. Melting of 4 laboratorial melts of K55 steel was conducted. Mechanical properties of pilot strips were examined. Investigation of microstructure via the methods of optical and scanning electronic microscopy was conducted. All samples have ferrite-pearlite microstructure which corresponded to the aimed microstructure. It was noted that molten metal without vanadium is more susceptible to forming of undesirable products of intermediate transformation stage. Recommendations on chemical composition and manufacturing technology of K55 steel on 2000 rolling mill are developed. Steel has the following aimed chemical composition for the main elements: 0.32 % C; 0.5 % Si; 1.05 % Mn; 0.05 % V. The following main technological parameters were recommended: heating up to 1240-1260 ºC; temperature after 5 th stand 1060-1100 ºC; thickness of rolled semiproduct 30-40 mm; temperature before 6 th stand 950-970 ºC; finishing rolling temperature 830-870 ºC; temperature in the 1 st coiling group 650-680 ºC; coiling temperature 620-640 ºC.

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Section: Introductionmentioning

confidence: 99%