THE USE OF HOT TORSION TESTING FOR DETERMINATION OF CRITICAL TEMPERATURES OF API X65 STEEL

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RAKHSHKHORSHID MASOUD; HASHEMI SEYED HOJJAT; MONAJATIZADEH HOSEIN

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Journal: Modares Mechanical Engineering Year:2015 | Volume:14 | Issue:13 Page(s): 291-296

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Title

THE USE OF HOT TORSION TESTING FOR DETERMINATION OF CRITICAL TEMPERATURES OF API X65 STEEL

Author(s)

RAKHSHKHORSHID MASOUD | HASHEMI SEYED HOJJAT | MONAJATIZADEH HOSEIN | Issue Writer Certificate

Keywords

AUSTENITE TO FERRITE TRANSFORMATIONQ2

TEMPERATURESQ2

NON-RECRYSTALLIZATION TEMPERATUREQ2

AVERAGE SCHEDULEQ2

CONTINUOUS COOLING TORSION TESTQ2

GAS TRANSPORTATION PIPELINE STEELQ2

Abstract

Thermo-mechanical control processing is used to produce API pipeline steels. To design a proper thermo-mechanical cycle, it is necessary to determine the critical TEMPERATURES including nonrecrystallization temperature (Tnr) and AUSTENITE TO FERRITE TRANSFORMATION start and finish TEMPERATURES (Ar3 and Ar1). In this research, AVERAGE SCHEDULE and continuous cooling torsion after areal schedule were used to determine critical TEMPERATURES of API X65 steel for the first time in Iran. This steel is imported from abroad and is extensively used in Iran for large diameter, high pressure gas transportation pipelines and for oil transmission networks. It was found that the AVERAGE SCHEDULE was a proper method to determine Tnr; while, continuous cooling torsion was proper to determine Ar3 and Ar1. The obtained results were compared with Boratto and Ouchi experimental relations (with the purpose of evaluating the reliability of these relations) for determination of Tnr and Ar3 critical TEMPERATURES. The obtained 4 percent relative error from both relations showed the need for conducting the experimental studies. Regarding the lack of experimental data, the obtained results can be used to design the optimum thermo-mechanical control process (through the selection of proper temperature ranges for rough and finish rolling stages) in domestic manufacturing of the test steel.

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APA: Copy

RAKHSHKHORSHID, MASOUD, HASHEMI, SEYED HOJJAT, & MONAJATIZADEH, HOSEIN. (2015). THE USE OF HOT TORSION TESTING FOR DETERMINATION OF CRITICAL TEMPERATURES OF API X65 STEEL. MODARES MECHANICAL ENGINEERING, 14(13), 291-296. SID. https://sid.ir/paper/179714/en

Vancouver: Copy

RAKHSHKHORSHID MASOUD, HASHEMI SEYED HOJJAT, MONAJATIZADEH HOSEIN. THE USE OF HOT TORSION TESTING FOR DETERMINATION OF CRITICAL TEMPERATURES OF API X65 STEEL. MODARES MECHANICAL ENGINEERING[Internet]. 2015;14(13):291-296. Available from: https://sid.ir/paper/179714/en

IEEE: Copy

MASOUD RAKHSHKHORSHID, SEYED HOJJAT HASHEMI, and HOSEIN MONAJATIZADEH, “THE USE OF HOT TORSION TESTING FOR DETERMINATION OF CRITICAL TEMPERATURES OF API X65 STEEL,” MODARES MECHANICAL ENGINEERING, vol. 14, no. 13, pp. 291–296, 2015, [Online]. Available: https://sid.ir/paper/179714/en

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