scholarly journals Sliding Mode Control with Sliding Perturbation Observer-Based Strategy for Reducing Scratch Formation in Hot Rolling Process

2021 ◽  
Vol 11 (12) ◽  
pp. 5526
Author(s):  
Hyun-Hee Kim ◽  
Sung-Jin Kim ◽  
Sung-Min Yoon ◽  
Yong-Joon Choi ◽  
Min-Cheol Lee
Keyword(s):  
Hot Rolling ◽  
Steel Plate ◽  
Sliding Mode ◽  
Rolling Process ◽  
Steel Plates ◽  
Velocity Difference ◽  
Impact Forces ◽  
Hot Rolling Process ◽  
Finishing Mill ◽  
The Impact

In a hot rolling process, excessive friction between rollers and steel plates may lead to the formation of scratches on the steel plate. To reduce scratch formation in the finishing mill of the hot rolling process, two techniques are proposed in this work: flying touch and velocity synchronization. The proposed flying touch method can reduce the impact of the generated force when the upper roller collides with the steel plate. In addition, the proposed velocity synchronization method can decrease the frictional force resulting from the velocity difference between the rollers and steel plate. The effectiveness of the proposed methods was demonstrated through simulations and experiments using a 1/40 downscaled hot rolling simulator. The simulations and experimental results demonstrate that the proposed methods can reduce the magnitudes of friction and impact forces that lead to scratch formation on the steel plates in the hot rolling process.

Influence of Heat Treatment on Mechanical Properties and Microstructure of Mining Machinery Steel Plate Containing Molybdenum and Niobium

2012 ◽  
Vol 602-604 ◽  
pp. 342-346
Author(s):  
Xian Jun Wang ◽  
Qing Feng Ding ◽  
Wen Bin Liu
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Impact Toughness ◽  
Hot Rolling ◽  
Steel Plate ◽  
Rolling Process ◽  
Rolled Plate ◽  
Rolled Steel ◽  
Hot Rolling Process ◽  
Mining Machinery

Influence of different heat treatment on microstructure and mechanical properties of mining machinery steel Plate containing molybdenum niobium was investigated. As-rolled steel plate was processed by normalizing and normalization-tempering respectively. Mechanical properties of as-rolled steel plate, normalizing steel plate and normalizing-tempering steel plate and their microstructures was made a contrast. The experiment result showed that formation of coarse ferrite grain in as-rolled state leads to lower impact toughness. Normalizing treatment can refine coarse ferrite formed in hot rolling process but formation of carbon oversaturation induced new dislocation and distortion. Processing of proper normalizing-tempering can eliminate coarse ferrite in as-rolled state and relieve new dislocation and distortion formed in normalizing process, and therefore made the mechanical properties of the as-rolled plate be the best state.

Thermal Behavior of Hot Strip in Finishing Mill of Hot Rolling Process

2016 ◽  
Vol 9 (10) ◽  
pp. 11-20 ◽  
Author(s):  
Jong-Hyeon Lee ◽  
Jeong-Seok Kang ◽  
Jin-Taek Kim ◽  
Byung-Joon Baek ◽  
Sung- Hyuk Lim ◽  
...  
Keyword(s):  
Thermal Behavior ◽  
Hot Rolling ◽  
Rolling Process ◽  
Hot Rolling Process ◽  
Hot Strip ◽  
Finishing Mill

Hot Rolling Process Simulation: Application to UIC-60 Rail Rolling

2010 ◽  
Vol 3 (1) ◽  
pp. 65-71
Author(s):  
Armindo Guerrero ◽  
Javier Belzunce ◽  
Covadonga Betegon ◽  
Julio Jorge ◽  
Francisco J. Vigil
Keyword(s):  
Hot Rolling ◽  
Process Simulation ◽  
Rolling Process ◽  
Hot Rolling Process

scholarly journals 3D-FEM Simulation of Hot Rolling Process and Characterization of the Resultant Microstructure of a Light-Weight Mn Steel

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 569
Author(s):  
Ana Claudia González-Castillo ◽  
José de Jesús Cruz-Rivera ◽  
Mitsuo Osvaldo Ramos-Azpeitia ◽  
Pedro Garnica-González ◽  
Carlos Gamaliel Garay-Reyes ◽  
...  
Keyword(s):  
Hot Rolling ◽  
Thermomechanical Processing ◽  
Computational Simulation ◽  
Effective Strain ◽  
Fem Simulation ◽  
Rolling Process ◽  
3D Fem ◽  
Hot Rolling Process ◽  
Mn Steel

Computational simulation has become more important in the design of thermomechanical processing since it allows the optimization of associated parameters such as temperature, stresses, strains and phase transformations. This work presents the results of the three-dimensional Finite Element Method (FEM) simulation of the hot rolling process of a medium Mn steel using DEFORM-3D software. Temperature and effective strain distribution in the surface and center of the sheet were analyzed for different rolling passes; also the change in damage factor was evaluated. According to the hot rolling simulation results, experimental hot rolling parameters were established in order to obtain the desired microstructure avoiding the presence of ferrite precipitation during the process. The microstructural characterization of the hot rolled steel was carried out using optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). It was found that the phases present in the steel after hot rolling are austenite and α′-martensite. Additionally, to understand the mechanical behavior, tensile tests were performed and concluded that this new steel can be catalogued in the third automotive generation.

Failure Analysis of a Working Roll Under the Influence of the Stress Field Due to Hot Rolling Process

2021 ◽  
Author(s):  
Reza Masoudi Nejad ◽  
Peyman Noroozian Rizi ◽  
Maedeh Sadat Zoei ◽  
Karim Aliakbari ◽  
Hossein Ghasemi
Keyword(s):  
Stress Field ◽  
Failure Analysis ◽  
Hot Rolling ◽  
Rolling Process ◽  
Hot Rolling Process

Modelling the Temperature Distribution along the Length of Strip during Hot Rolling Process

2004 ◽  
Vol 75 (5) ◽  
pp. 330-338 ◽  
Author(s):  
Xiaochun Sha ◽  
Dianzhong Li ◽  
Yongjun Lan ◽  
Xiaogang Zhang ◽  
Yiyi Li
Keyword(s):  
Temperature Distribution ◽  
Hot Rolling ◽  
Rolling Process ◽  
Hot Rolling Process
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