The X80 Pipeline Steel produced by a Novel Ultra Fast Cooling Process

Zhou, Fenglei; Dai, Jietao; Gao, Jixiang; Zhou, Qing; Li, Liejun

doi:10.1088/1742-6596/1676/1/012102

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…concentration of hydrogen sulfide and carbon gas as well as their partial pressures; pH of environment; temperature of the pumped product; technological interruptions; equipment conditions etc.) [16]. Hence, strength calculation of deep pump rod strings of oil wells and their diameter determination with the help of output parameter should involve minimum allowable value of steel flow stress σ min 0.2; in addition, suitability of structural materials is assessed with the help of threshold stresses expressed by an environment impact factor [17]: ktssc = σtssc / σ min 0.2.…”

Section: Figure 2 Tendency Of Deep Pump Rods To Sulfide Corrosion Whi...mentioning

confidence: 99%

Analysis of corrosion fatigue steel strength of pump rods for oil wells

Vynnykov¹,

Kharchenko²,

Manhura³

et al. 2022

Min. miner. depos.

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Purpose is to perform analysis of corrosion durability (fatigue) of pump rod materials in terms of various chemically active simulation environments, and study influence of economically modified rare-earth impurity on corrosion fatigue strength of pump rod materials. Methods. 40 and 20N2M steel grades have been applied as well as experimental steel (ES). Steel of the conditinal ES grade has been melted within a pilot site of Institute of Electric Welding Named after E.O. Paton of the National Academy of Sciences of Ukraine. The steel was alloyed economically by means of a micro impurity of a rare-earth element (REE) being 0.03% of cerium; in addition, it contained comparatively low concentration of sulfur and phosphorus as well as minor concentration of dissolved hydrogen. The following has been used as simulation environments: 1) NACE environment (i.e. 5% NaCl solution which contained 0.5% СН3СООН, and saturated H2S; t = 22 ± 2°C; pH = 3.8-4.0); 2) 3% NaCl solution without hydrogen sulphide. Once every day, the environment was replaced to oxygenate it up to 8-10 mg/l concentration. Findings. Stability against sulfide stress-corrosion cracking (SSCC), hydrogen initiated cracking (HIC), and corrosion fatigue of steel of deep pump rods for oil industry has been studied. It has been defined that the experimental steel, modified economically by means of micro impurities of a REE, meets NACE MR0175-96 standard in terms of chemical composition as well as strength; in turn, 20N2M and 40 steel grades have high resistance neither to SSCC (threshold stresses are < 0.8 s) nor to corrosion fatigue attack; moreover, steel grade 40 has demonstrated low resistance to HIC (CLR > 6% and CTR > 3%). Originality. It has been identified that corrosion fatigue attack results from hydrogen penetration of steel initiating its cracking and hence destruction under the effect of alternating loads accelerated by the action of corrosive environment. Further, surface micro destructions, influenced by micro stresses, transform into large discontinuities and cracks with following macro destructions. Practical implications. It has been proved that high resistance to corrosion cracking can be achieved by means of refining of pump-rod steel of ferrite and perlite type using metallurgical methods, i.e. 0.01-0.03% REE microalloying.

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Section: Figure 2 Tendency Of Deep Pump Rods To Sulfide Corrosion Whi...mentioning

confidence: 99%

Analysis of corrosion fatigue steel strength of pump rods for oil wells

Vynnykov¹,

Kharchenko²,

Manhura³

et al. 2022

Min. miner. depos.

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A review on the advance of low-temperature toughness in pipeline steels

Bai

Shang

et al. 2023

Journal of Materials Research and Technology

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Mathematical Models for Forecasting of 10Mn2VNb Steel Heavy Plates Mechanical Properties

Prysiazhnyi

Kukhar

Hornostai

et al. 2021

MSF

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The problem urgency for determining the optimal rolling and heat treatment schedules for providing the required indices of heavy plates physical and mechanical properties is shown. The use of statistical mathematical models for solving this problem is substantiated and the methodology for their design is described. Statistical mathematical models were designed using the mathematical statistics methods and Data Mining tools to determine the yield strength, ultimate tensile strength and percent elongation for 10Mn2VNb steel plates rolled under 3600 heavy plate mill conditions. Software for the numerical implementation of these statistical mathematical models has been developed. Applied software has been developed for the numerical implementation of the statistical mathematical models for predicting the heavy plate’s mechanical properties, and high calculation accuracy has been confirmed with the ones help: 95.82% for the yield strength, 96.78% for the ultimate tensile strength, and 91.48% for the percent elongation. The regularities of the influence for finish rolling factual temperature in the finishing stand of 3600 heavy plate mill and the plate thickness on 10Mn2VNb pipe steel physical and mechanical properties were identified by processing the database and using the designed software.

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The X80 Pipeline Steel produced by a Novel Ultra Fast Cooling Process

Cited by 3 publications

References 5 publications

Analysis of corrosion fatigue steel strength of pump rods for oil wells

Analysis of corrosion fatigue steel strength of pump rods for oil wells

A review on the advance of low-temperature toughness in pipeline steels

Mathematical Models for Forecasting of 10Mn2VNb Steel Heavy Plates Mechanical Properties

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