Effect of Preliminary Deformation of Continuously Cast Billets by Radial-Shear Rolling on the Structure and Properties of Hot-Rolled Chromium-Containing Steel Pipes

AbstractThe study has established the main regularities of a fatigue failure of offshore gas steel pipes installed using S-lay and J-lay methods.We have numerically analyzed the influence of preliminary deformation on the fatigue life of 09Mn2Si steel at different amplitudes of cyclic loading. The results have revealed the regularities of formation and development of a fatigue crack in 17Mn1Si steel after 40 years of underground operation. The quantitative analysis describes the regularities of occurrence and growth of fatigue cracks in the presence of a stress concentration.

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The influence of radial shear rolling on the structure and properties of 58Ni-Cr-Mo-B-Al-Cu superalloy

Letters on Materials ◽

10.22226/2410-3535-2021-4-566-570 ◽

2021 ◽

Vol 11 (4s) ◽

pp. 566-570

Author(s):

Aerika Bikmukhametova ◽

Elvina Galieva ◽

Irshat Valeev ◽

Ekaterina Klassman ◽

Irek Musabirov ◽

...

Keyword(s):

Structure And Properties ◽

Radial Shear Rolling

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The Effect of Alloying Elements on the Stability of Centerline Segregation

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.297-301.148 ◽

2010 ◽

Vol 297-301 ◽

pp. 148-153 ◽

Cited By ~ 1

Author(s):

Mihály Réger ◽

Balázs Verő ◽

Ibolya Kardos ◽

Péter Varga

Keyword(s):

Carbon Activity ◽

Middle Part ◽

Steel Plates ◽

Alloying Elements ◽

Centerline Segregation ◽

Quality Properties ◽

Continuously Cast ◽

The Stability ◽

Hot Rolled

The paper deals with the stability of centerline inhomogenity of continuously cast slabs and hot rolled products. The centerline segregation is a disadvantageous failure of slabs which can affect the quality properties of the final products. During hot rolling of slabs the centerline segregation pattern will become thin and stretch and it can also be detected in the middle part of heavy plates and coils. It is a common experience that the centerline segregation of heavy plates can not be easily decreased by post heat treatment. The pattern of the centerline segregation was modeled physically by preparing a sandwich structure of steel plates with different levels of carbon and alloying elements. Homogenization experiments were performed and the samples were examined metallographically. Diffusional calculations proved the governing role of carbon activity which is influenced by the distribution of alloying elements.

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Sour Resistant High Strength Seamless Pipes for Risers

Volume 3: Materials Technology; Ocean Space Utilization ◽

10.1115/omae2013-10252 ◽

2013 ◽

Author(s):

Matteo Ortolani ◽

Ettore Anelli ◽

Paolo Novelli ◽

Emanuele Paravicini Bagliani

Keyword(s):

Heat Treatment ◽

Mechanical Testing ◽

High Strength ◽

Post Weld Heat Treatment ◽

Water Quenching ◽

Potential Solution ◽

Steel Pipes ◽

Before And After ◽

Hot Rolled ◽

Sour Service

In case of a Weld On Connector’s riser using ASTM A182 F22 forged joints, high strength (SMYS of 80 ksi) steel pipes for sour service (hardness below or equal to 250 HV10) suitable for welding to the connectors are required. Welding is challenging because of the Post Weld Heat Treatment (PWHT) needed to reduce the hardness in the F22 HAZ while maintaining the required strength in the pipe. Theoretical evaluations were performed by means of metallurgical models and a potential solution was identified in grade P22-like steel (2¼ Cr - 1 Mo), with minor modifications with respect to the standard ASTM A335 and supplied in Q&T condition. A trial heat was cast and hot-rolled into pipes. After water quenching, the response to tempering was assessed by means of laboratory heat treatments and subsequent mechanical testing, together with metallurgical examination. Simulated PWHTs were also performed on Q&T material. 80 ksi grade P22 seamless pipes were finally produced and qualification involved mechanical testing before and after simulated PWHT: SMYS of 80 ksi and HV10 ≤ 250 requirements were met. The material also exhibited excellent toughness and resistance to HIC and SSC cracking.

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Influence of Thermal Cyclic Deformation and Hardening Heat Treatment on the Structure and Properties of Steel 10

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.788.187 ◽

2015 ◽

Vol 788 ◽

pp. 187-193 ◽

Cited By ~ 1

Author(s):

Aleksandr Prudnikov ◽

Marina Popova ◽

Vladimir Prudnikov

Keyword(s):

Heat Treatment ◽

Cyclic Deformation ◽

Sheet Steel ◽

Strength Characteristics ◽

Rolled Sheet ◽

Structure And Properties ◽

Fine Grained ◽

Fine Grained Structure ◽

Hot Rolled ◽

Hardening Heat Treatment

The results of the influence of preliminary thermal cyclic deformation and subsequent hardening heat treatment on the microstructure and mechanical properties of hot-rolled sheet steel 10 are presented. It is shown that the use of preliminary thermal cyclic deformation of the steel 10 stock material results in a fine-grained structure of a hot-rolled sheet (3 mm thick) produced by an industrial technology. Deformation occurred at a temperature above AC3 (1250 °C), with cooling to 200-300 °C during 10 cycles and the deformation ratio per cycle being 6-8 %. Such a treatment before sheet hot-rolling allows increasing the strength characteristics (tensile strength, yield strength) by almost 30 %. It has been established that the use of subsequent heat treatment (quenching, 900 °C, water and tempering 1 h, 600 °C) leads to a further increase in strength characteristics by 15-20% while maintaining a sufficient level of ductility of sheet steel.

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Effect of Process Parameters on the Microstructure and Mechanical Properties of Bars from Al-Cu-Mg Alloy Processed by Multipass Radial-Shear Rolling

10.21203/rs.3.rs-1116468/v1 ◽

2021 ◽

Author(s):

Torgom Akopyan ◽

Yury Gamin ◽

Sergey Galkin ◽

Alexander Koshmin ◽

Tatiana Kin ◽

...

Keyword(s):

Mechanical Properties ◽

Fem Simulation ◽

High Strength ◽

Rolling Temperature ◽

Structure And Properties ◽

Microstructure And Mechanical Properties ◽

Deformation Regime ◽

Radial Shear Rolling ◽

Influence Degree ◽

Selection Of

Abstract The study of microstructure and mechanical properties formation of A2024 alloy obtained by the multipass radial-shear rolling (RSR) method is discussed in this article. FEM simulation was carried out that made it possible to evaluate the influence degree of rolling temperature-velocity parameters on the strain state of material. It has been found the increase in rotary velocity of rolls significantly influences on the deformation heating of bar after RSR (predominantly in its surface layer). The combination of rolling temperature-velocity conditions at selection of deformation regime has complex effect on structure and properties formation. The analysis of sizes and distribution of phase particles has shown that the rolling at lower temperatures allowed to increase the mechanical strength due to the more intensive refinement of undissolved Fe-containing phase. The gradual decrease in the rolling temperature in each pass makes possible to achieve the high strength (UTS~430 MPa and YS~255 MPa) while maintaining the ductility level ~15%, that are comparable to ones obtained at some severe plastic deformation (SPD) methods.

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