Modeling and Optimization of Mould Non-Sinusoidal Oscillation Process

2011 ◽  
Vol 291-294 ◽  
pp. 3060-3063
Author(s):  
Hong Ming Wang ◽  
Bo Feng Yang ◽  
Bang Min Song ◽  
Ting Wang Zhang ◽  
Yong Qi Yan
Keyword(s):  
Continuous Casting ◽  
Casting Speed ◽  
Oscillation Frequency ◽  
Oscillation Amplitude ◽  
Sinusoidal Oscillation ◽  
Modeling And Optimization ◽  
Oscillation Process ◽  
Continuous Casting Mould ◽  
Factor Α

A model on non-sinusoidal oscillation of continuous casting mould was established to study the pressure in flux channel. The effects of oscillation parameters on the pressure in flux channel were researched. The non-sinusoidal oscillation parameters were optimized. When the casting speed is 1.8 m·min-1, the optimized oscillation parameters are: non-sinusoidal factor (α) is 0.198, oscillation amplitude (s) is ±4mm and oscillation frequency (f) is 165min-1. When the casting speed is 2.0 m·min-1, the optimized oscillation parameters are: α is 0.186, s is ±4.5mm and f is 155min-1. These optimized oscillation parameters are proved applicable in practice.

A New Non-Sinusoidal Oscillation Waveform for Continuous Casting Mold

2010 ◽  
Vol 154-155 ◽  
pp. 334-337
Author(s):  
Xin Jin ◽  
Ting Zhi Ren
Keyword(s):  
Continuous Casting ◽  
Oscillation Frequency ◽  
Casting Process ◽  
Sinusoidal Oscillation ◽  
Continuous Casting Mold ◽  
Continuous Casting Process ◽  
Advanced Technique ◽  
Continuous Casting Slab ◽  
New Type

A new non-sinusoidal oscillation waveform which is shown by waveform distortional rate was advanced. The amplitude, oscillation frequency, waveform distortional rate and casting velocity were established for a computer model of the continuous casting process. The range of waveform distortional rate was ascertained. The choosing method of amplitude and oscillation frequency was given. These offered a theory basis to the application of the advanced technique. Industrial scale experiments showed the new type waveform is effective on improving the quality of continuous casting slab and reducing breakout.

Hydrodynamic Lubrication during Non-Sinusoidal Oscillation for a Continuous Casting Mould

2014 ◽  
Vol 789 ◽  
pp. 362-369 ◽  
Author(s):  
Jie Yang ◽  
Xiang Ning Meng ◽  
Miao Yong Zhu
Keyword(s):  
Continuous Casting ◽  
Hydrodynamic Lubrication ◽  
Analytical Calculation ◽  
Sinusoidal Oscillation ◽  
Cold Model ◽  
Experimental Apparatus ◽  
Cyclic Movement ◽  
Flux Consumption ◽  
Continuous Casting Mould ◽  
Mixed Oil

A hydrodynamic lubrication model of a flux channel was established for a continuous casting mould with non-sinusoidal oscillation. A new experimental apparatus was developed simultaneously for analysing the lubrication mechanism. A mixed oil, which was simulated mould flux, was poured and infiltrated into the channel, and the flux consumption was determined in the process of oscillation. Based on the combination of analytical calculation and cold model experiment, the flux channel is divided into two parts to clarify the behaviours of flux infiltration and shell deformation. The results show that oscillation marks and surface cracks are formed at the bottom of the meniscus during the negative and positive strip time respectively. Meanwhile, the liquid flux is periodically infiltrated into the channel by negative pressure below the meniscus because the cyclic movement of the shell lags behind the mould oscillation. The casting performances were improved by increasing the non-sinusoidal oscillation factor.

Effect of Casting Speed on Slab Broadening in Continuous Casting

2011 ◽  
Vol 82 (11) ◽  
pp. 1266-1272 ◽  
Author(s):  
Jian-Xun Fu ◽  
Wen-Sing Hwang ◽  
Jing-She Li ◽  
Shu-Feng Yang ◽  
Zhang Hui
Keyword(s):  
Continuous Casting ◽  
Casting Speed

scholarly journals Influence of M-EMS on Fluid Flow and Initial Solidification in Slab Continuous Casting

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3681
Author(s):  
Guoliang Liu ◽  
Haibiao Lu ◽  
Bin Li ◽  
Chenxi Ji ◽  
Jiangshan Zhang ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Flow Field ◽  
Continuous Casting ◽  
Casting Speed ◽  
Liquid Pool ◽  
Industrial Test ◽  
Magnetic Flux Density ◽  
Continuous Casting Mold ◽  
Slab Continuous Casting ◽  
Initial Solidification

A mathematical model coupled with electromagnetic field has been developed to simulate the transient turbulence flow and initial solidification in a slab continuous casting mold under different electromagnetic stirring (EMS) currents and casting speeds. Through comparing the magnetic flux density, flow field with measured results, the reliability of the mathematical model is proved. The uniform index of solidified shell thickness has been introduced to judge the uniformity of the solidified shell. The results show that a horizonal recirculation flow has been generated when EMS is applied, and either accelerated or decelerated regions of flow field are formed in the liquid pool. Large EMS current and low casting speed may cause the plug flow near the mold narrow face and a suitable EMS current can benefit to the uniform growth of solidified shell. Meanwhile, an industrial test exhibits that EMS can weaken the level fluctuation and number density of inclusion. Overall, a rational EMS current range is gained, when the casting speed is 1.2 m/min, the rational EMS current is 500–600 A.

Effect of Non-Sinusoidal Oscillation Parameters on Mold Flux Consumption Rate

2011 ◽  
Vol 66-68 ◽  
pp. 185-188
Author(s):  
Hong Ming Wang ◽  
Ting Wang Zhang ◽  
Yong Qi Yan ◽  
Bang Min Song ◽  
Gui Rong Li
Keyword(s):  
Mathematical Model ◽  
Continuous Casting ◽  
Mold Flux ◽  
Consumption Rate ◽  
Sinusoidal Oscillation ◽  
Continuous Casting Mold ◽  
Casting Mold ◽  
Mold Oscillation ◽  
Flux Consumption

According to the rule of non-sinusoidal oscillation of continuous casting mold, a mathematical model was established to study the effects of oscillation parameters on the consumption rate of mold flux. The results indicated that the mold flux consumption rate is remarkably affected by the non-sinusoidal factor. This proves that the non-sinusoidal oscillation of mold contributes to increase the flux consumption. Moreover, the amplitude and frequency of mold oscillation have effects on mold flux consumption rate. The non-sinusoidal oscillation parameters must be optimized.

Effect of Strain Rate on Nb(C,N) Precipitation in Micro Alloy Steel Slab

2012 ◽  
Vol 535-537 ◽  
pp. 633-638 ◽  
Author(s):  
Zheng Hai Zhu ◽  
Sheng Tao Qiu
Keyword(s):  
Continuous Casting ◽  
Strain Rate ◽  
Alloy Steel ◽  
Casting Speed ◽  
Casting Process ◽  
Continuous Casting Process ◽  
Precipitation Model ◽  
Strain And Strain Rate ◽  
Steel Slab

It was analyzed by strain-induced precipitation model that Nb(C,N) precipitation in micro alloy steel slab was effected by strain rate during continuous casting process. The results are as follows: The changing of casting speed could effect the time for 5%precipitation of Nb(C,N), which was decreasing with increasing casting speed at certain temperature and strain rate. Slab strain and strain rate were too small in bending zone and leveling zone. The effect of slab strain rate on Nb(C,N) precipitation could be ignore when Nb(C,N) precipitation in continuous casting process was studied.

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