Finite element analysis and experiment on induction heating process of slab continuous casting-direct rolling

2019 ◽  
Vol 116 (4) ◽  
pp. 403
Author(s):  
Chao Yu ◽  
Hong Xiao ◽  
Zi-chen Qi ◽  
Yun-peng Zhao
Keyword(s):  
Finite Element ◽  
Continuous Casting ◽  
Induction Heating ◽  
Heating Process ◽  
Element Analysis ◽  
Actual Production ◽  
Heating Surfaces ◽  
Direct Rolling ◽  
Heating Technology ◽  
Moving Speed

To reduce the energy consumption of reheating billets between the continuous casting and hot rolling processes, the continuous casting-direct rolling (CC-DR) process is developed, of which one of the key technologies in CC-DR is compensative heating between the processes. Considering the compensative heating technology requirements in the actual production of slab CC-DR, the finite element models of longitudinal flux induction heating (LFIH) and transverse flux induction heating (TFIH) are established to analyse the slab heating process. The results show that LFIH is good for heating surfaces of the slab, but cannot solve the problem of low temperature on the edges, which can effectively be heated with TFIH. The temperature distribution of the slab can be made more uniform by choosing the appropriate current and moving speed. Besides, induction-heating prototypes are developed to inspect the effect of induction heating. The measured results are consistent with the simulated ones. The results of the analysis have direct significance on the induction heating process in the actual production of slab CC-DRs.

Finite Element Analysis of Slab Steel in the Process of Induction Heating

2008 ◽  
Vol 575-578 ◽  
pp. 282-287 ◽  
Author(s):  
R.B. Mei ◽  
Chang Sheng Li ◽  
B. Han ◽  
Xiang Hua Liu
Keyword(s):  
Finite Element ◽  
Induction Heating ◽  
Low Frequency ◽  
Heating Time ◽  
Initial Time ◽  
Heating Process ◽  
Steel Mill ◽  
Element Analysis ◽  
Steel Temperature ◽  
Good Agreement

The induction heating process of slab steel had been discussed by finite element method. The results obtained were in good agreement to the measured value. In addition, the low-frequency induction heating process of slab steel was investigated and analyzed in detail according to the practice requirements of a steel mill. During the heating process of slab steel by low-frequency induction, the temperature increasing speed of surface is faster than that of center in initial time. With the increment of heating time, the temperature increasing speed of surface becomes lower because of the heat loss of boundary. A 90 percent of the slab steel temperature had risen from 1100°C to 1400°C with 110Hz and 6.2×106A/m2 after 30min, which could be satisfied with heating requirements.

Simulation to the Temperature Field for Continuous Casting Billet during Direct Rolling of Free-Heating

2014 ◽  
Vol 941-944 ◽  
pp. 1890-1894
Author(s):  
Guang Zheng Luo ◽  
Xin Liu ◽  
Ying Zhi ◽  
Xiang Hua Liu
Keyword(s):  
Heat Transfer ◽  
Finite Element Method ◽  
Finite Element ◽  
Temperature Field ◽  
Continuous Casting ◽  
Transfer Process ◽  
Heat Transfer Process ◽  
Direct Rolling ◽  
Cutting Point ◽  
Continuous Casting Billet

The temperature field of continuous casting billet (CC-billet) is important to carry out the research on direct rolling of free-heating (DROF). The solidification and the heat transfer process of CC-billet from crystallizer to cutting point were studied by finite element method (FEM).The casting speed was improved in order to get reasonable temperature field during DROF.

scholarly journals Efficient analysis of welding thermal conduction using the Newton–Raphson method, implicit method, and their combination

2020 ◽  
Vol 111 (7-8) ◽  
pp. 1929-1940 ◽  
Author(s):  
Zhongyuan Feng ◽  
Ninshu Ma ◽  
Wangnan Li ◽  
Kunio Narasaki ◽  
Fenggui Lu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Hybrid Method ◽  
Thermal Conduction ◽  
Computing Time ◽  
Implicit Method ◽  
Heating Process ◽  
Element Analysis ◽  
Heating And Cooling ◽  
Raphson Method

AbstractFinite element analysis is commonly used to investigate the thermal-mechanical phenomena during welding. To improve the computing efficiency of finite element analysis for welding thermal conduction, a novel Newton–Raphson method (NRM) without the computation of inverse matrix and a hybrid method combing the NRM and conventional implicit method (IMP) were developed. Comparison of computing time between the hybrid method implemented in an in-house software JWRIAN and the IMP used in a commercial software ABAQUS indicated that the computing speed of the former was about 4.5 times faster than that of the latter. Additionally, compared to the conventional IMP, the NRM exhibited higher computing efficiency in the analysis of transient thermal conduction during the welding heating process. Meanwhile, a combined hybrid method of the NRM and IMP was verified to be more efficient in analyzing the welding thermal conduction throughout the heating and cooling processes. Moreover, the thermal cycles computed by the hybrid method were consistent with those from experimental measurement, indicating the high accuracy of the hybrid method. Furthermore, the hybrid method was used to predict the temperature field of the corner boxing fillet joint welded by a low transformation temperature weld metal for generation of compressive residual stress.

Optimization Design Based on DEFORM-3D Finite Element Analysis about Steel Rolling Production

2011 ◽  
Vol 480-481 ◽  
pp. 1079-1084 ◽  
Author(s):  
Jian Hua Ren ◽  
Wei Wang ◽  
Rong Liu
Keyword(s):  
Finite Element ◽  
Production Process ◽  
Optimum Design ◽  
High Speed ◽  
Optimization Design ◽  
Rolling Process ◽  
Element Analysis ◽  
Steel Rolling ◽  
Finite Element Software ◽  
Actual Production

This paper took the high-speed wire rod rolling process of φ20 bar as the research object, to be simulated numerically under the work platform of the finite element software DEFORM. The simulation results were compared with the actual operation of the production process, the rolling simulation reappeared the actual production situation, realized the visualization of the rolling process. After analysis, the defects of rolling technology were found out. Based on the research, the optimum design was gotten and then simulated which improved the actual production process and avoided the original defects. The optimum design is feasible to practical production and reduce the cost of test in practice The paper just focused on the first one of 12 rolling process as an example to show the simulating process and results.

Numerical Simulation of Induction Heating Process of Continuous Casting Slab

2008 ◽  
Vol 575-578 ◽  
pp. 37-42 ◽  
Author(s):  
Hao Liu ◽  
Li Liang Chen ◽  
Jian Xin Zhou
Keyword(s):  
Finite Difference ◽  
Continuous Casting ◽  
Induction Heating ◽  
Mathematic Model ◽  
Heating Process ◽  
Power Intensity ◽  
Continuous Casting Slab ◽  
Steel Technology ◽  
Slab Temperature ◽  
Enhance Efficiency

Compared with traditional blazing furnace, the Continuous Casting-Direct Rolling is an advanced manufacturing steel technology, which can reduce energy waste, decrease pollution and enhance efficiency. The characteristics of steels during induction heating are complex, the change of material properties with temperature makes exact analysis methods very difficult to implement. Therefore, a powerful computer aided numerical tool (i.e., finite difference analysis) is selected to numerically model the induction heating process in this paper. The mathematic model coupling with electromagnetic field and thermal field was established, and it was solved by finite difference method (FDM), thus the slab temperature distribution and its variation with time were obtained, and the characteristics in whole induction heating process were studied. To validate the program feasible, the results were evaluated and compared with experiment results, which showed that the simulation results are reliable and effective. The skin effect in heating process from the two results was studied and demonstrated, the temperature change caused by different parameters such as the induced power intensity and the corner radian were also presented, which indicate that the slab temperature can be heated uniformly through adjusting these parameters, thus the continuous casting slab can meet the rolling requirement.

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