Constitutive Model of 30CrMoA Steel with Strain Correction

Zhang, Song; Shu, Xuedao; Wang, Jitai; Xia, Yingxiang

doi:10.3390/met10091214

Cited by 7 publications

(5 citation statements)

References 17 publications

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“…In the full-scale physical fatigue tests, the axle successfully passed the tests, and under the condition of a speed of 350 km/h, the safety factor was around 1.99, which significantly improved the safety level. Due to the similar chemical composition with 30NiCrMoV12, 30CrMoA has been developed to replace the 30NiCrMoV12 because of the cheaper manufacturing cost and the promising properties that has been shown in the previous study [28]. The chemical composition of 30CrMoA steel is shown in Table 1.…”

Section: Materials Modelmentioning

confidence: 97%

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Microstructure evolution of three-roll skew-rolling formed hollow axles with uniform wall thickness.

Chen

Zhang²,

Bidare³

et al. 2022

Preprint

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The uniform thickness hollow axle is one of the lightest weight axles in the high-speed rail industry. It can effectively reduce unsprung mass and further improve the train speed. Therefore, due to its importance and significance, it is crucial to research and develop the uniform thickness hollow axle. To understand the microstructural evolution during three-roll skew-rolling (TRSR) forming, 30CrMoA alloy steel was used in this study. A constitutive model of 30CrMoA was established by SIMUFACT FORMING finite element software and utilized to simulate the deformation, heat transfer, and microstructure coupling during TRSR. Via analyzing the influence of process parameters on the average grain size, the microstructural evolution of the forming part at each deformation stage is revealed. The result shows that the dynamic recrystallization of the rolled piece produces a fine and uniform grain structure during the forming process. The refinement level is enhanced with the increase of the radial compression; the grain size is gradually increased from the outer surface to the inner surface of the rolled piece. At a higher rolling temperature, it was found the initial grain size and final average grain size were larger compared to the lower temperature. By increasing the axial traction speed, not only can the rolling time be shortened, but also the appearance of coarse grains can be avoided. Therefore, the mechanical properties can be improved.

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Section: Materials Modelmentioning

confidence: 97%

“…Constitutive relations of 30CrMoA steel are obtained and imported into the material bank of finite element software. The material models are described in the previous studies [28,29], and are shown in Eqs. ( 5) and ( 6).…”

Section: Materials Modelmentioning

confidence: 99%

Microstructure evolution of three-roll skew-rolling formed hollow axles with uniform wall thickness.

Chen

Zhang²,

Bidare³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…The material of the HSCWT is 30CrMoA steel. The material model of the HSCWT is shown in Equation (1) [29,30]. The finite element model of the three-roll skew rolling HSCWT is established in Simufact Forming V14.0 software.…”

Section: Finite Element Model Of Hscwt For Three-roll Skew Rollingmentioning

confidence: 99%

The Mechanism of Forming Hollow Shafts with Constant Wall Thickness by Three-Roll Skew Rolling

Zhang,

Shu,

Wang

et al. 2024

Metals

Self Cite

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To solve the problem of the long forming process for hollow shafts with constant wall thickness (HSCWT), a new process for forming HSCWT, namely three-roll skew rolling, has been proposed. First, the working principle of the three-roll skew rolling process is presented. Then, the finite element model (FEM) of the three-roll skew rolling HSCWT is established. The strain-stress field and temperature field distribution rules of the three-roll skew rolling HSCWT are analyzed with FEM. The stress-strain field of the rolled piece is distributed uniformly along the axial direction but not uniformly along the radial direction. The variation of the temperature field is related to the axial traction velocity. The greater the axial traction velocity, the smaller the variation of the temperature field. The temperature of rolled pieces varies within 100 °C during rolling. Finally, the three-roll skew rolling experiment of the HSCWT is carried out. The results show that the three-roll skew rolling process can form HSCWT. The temperature field of the three-roll skew rolling HSCWT is evenly distributed. The selection of larger axial traction velocity is conducive to the forming of rolled pieces. The three-roll skew rolling technology has achieved near constant temperature forming of HSCWT.

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“…As can be seen from figure 2, the finite element model is composed of a roll, a push block, a positioning ring, a baffle, a plug and a billet, wherein the billet size is Φ 45mm × 200mm, and in order to simulate the Mannesmann effect in real production [13], a small hole with a diameter of 2mm is opened in the center of the billet, and the material is set to 30CrMoA. Its rheological curve is shown in figure 3, and the empirical constitutive equation is [14][15]:…”

Section: Figure 2 Finite Element Model Of Processmentioning

confidence: 99%

Effect of process parameters on forming quality of hollow axle blank with rotary piercing

Shu

Lin

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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At present, hollow axles are mostly manufactured by precision forging and then deep processing, which has long technological process and high cost. In order to realize the integrated forming of hollow axles with short process and low cost piercing and skew rolling, a method of piercing billet by two-roll skew rolling is proposed in this paper, and the finite element model of the forming process is established by using SimufactForming software. The effects of roll feed angle, roll speed and plug advance on the wall thickness uniformity of piercing tube billet are explored, and the process parameters with the best wall thickness uniformity are obtained. It lays a technical foundation for the blank guarantee and the realization of the integrated forming process of hollow axle.

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Constitutive Model of 30CrMoA Steel with Strain Correction

Cited by 7 publications

References 17 publications

Microstructure evolution of three-roll skew-rolling formed hollow axles with uniform wall thickness.

Microstructure evolution of three-roll skew-rolling formed hollow axles with uniform wall thickness.

The Mechanism of Forming Hollow Shafts with Constant Wall Thickness by Three-Roll Skew Rolling

Effect of process parameters on forming quality of hollow axle blank with rotary piercing

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