scholarly journals Construction of Nonsinusoidal Oscillation Waveform Function and Technological Parameters for Continuous Casting Mold

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Chao Zhou ◽  
Xingzhong Zhang ◽  
Fang Wang ◽  
Subo Ren
Keyword(s):  
Continuous Casting ◽  
Surface Quality ◽  
Sinusoidal Oscillation ◽  
Technological Parameters ◽  
Continuous Casting Mold ◽  
Synchronous Control ◽  
Limit Value ◽  
Steel Continuous Casting ◽  
The Impact

Nonsinusoidal oscillation techniques can shorten the negative strip time and improve the slab surface quality in the process of steel continuous casting. But the acceleration of nonsinusoidal oscillation is higher than that of the sinusoidal oscillation. So it is easy to result in the impact for the mold movement. To solve this problem, a nonsinusoidal oscillation waveform function of mold was constructed, which had good dynamic characteristics. And the smaller acceleration can reduce the impact of the oscillator. By analyzing the parameters of oscillation technology, the calculation method of each oscillation technological parameter for seven section functions was presented and the multitechnological parameter curves were given. Based on the technological parameters of sinusoidal oscillation, a synchronous control model of nonsinusoidal oscillation was determined. The results show that the parameters can satisfy the limit value in theory, which can enhance the casting speed, surface quality of slab, and provide reference for further practice in industry.

scholarly journals Continuous Casting and Rolling Technology at MKM Mansfelder Kupfer und Messing GmbH – Optimisation of the Surface Quality for Conti-M® Strip

2016 ◽  
Vol 854 ◽  
pp. 255-259
Author(s):  
Klaus Dieter Palm ◽  
Hendrik Busch ◽  
Axel Dusdorf
Keyword(s):  
Control System ◽  
Continuous Casting ◽  
Surface Quality ◽  
Rolling Process ◽  
Process Control System ◽  
Quality Development ◽  
The Impact ◽  
Rolling Technology ◽  
Process Product

Using Conti-M® which is a globally unique technology for producing cast-rolled copper strips, MKM has been able to link and optimise the continuous casting and rolling process together with the surface quality of milled strips. The last 15 years have seen many targeted projects for process, product and quality development. In this article, the process related challenges to optimise the surface quality of casting strip will be highlighted. We will present a process control system and the impact it had in the optimisation of the surface quality.

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.

The Influence of the Near-Meniscus Zone in Continuous Casting Mold on the Surface Quality of the Continuous Casting Ingots

2012 ◽  
Vol 57 (1) ◽  
pp. 371-377 ◽  
Author(s):  
A. Sorek ◽  
Z. Kudliński
Keyword(s):  
Ionic Liquid ◽  
Continuous Casting ◽  
Surface Quality ◽  
Liquid Slag ◽  
Galvanic Cell ◽  
Mold Powder ◽  
Continuous Casting Mold ◽  
Specific Kind ◽  
Casting Mold

The Influence of the Near-Meniscus Zone in Continuous Casting Mold on the Surface Quality of the Continuous Casting IngotsThe physical, chemical and mechanical phenomena which take place in the near-meniscus zone of continuous casting mold are the significant factors influencing the quality of CC ingot and especially the quality of its surface. Such phenomena consist of the following processes: lubrication of the ingot surface by the liquid slag-forming phase of mold powder, creation of meniscus, formation of the specific kind of galvanic cell and connected with this cell ions migration of liquid mold powder. Application of the mold powders is the commonly used lubrication method of the surface of CC ingots in mold (in near-meniscus zone). According to the ionic structure theory of the liquid metallurgical slags the following thesis can be formulated: the liquid slag-forming phase of mold powder is the ionic liquid. The ionic liquid occurs between two metals: the copper wall of mold and the steel surface of ingot can create a specific kind of galvanic cell in the upper part of mold (the near-meniscus zone of mold). The paper presents results of industrial research of low-carbon steel continuous casting. The electromotive force of galvanic cell situated in the upper (near-meniscus) part of CC mold was measured. Moreover, the influence of applied powders with different alkalinity on the character of oscillatory marks forming on the ingot surface was considered. The galvanic cell, which is created in the upper part of mold in the near-meniscus zone, can cause the essential change of the chemical composition of electrolyte (liquid phase of mold powder) in the near-electrodes zones. So in the process the condition of lubrication and character of obtained oscillatory mark can also be changed.

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.

Effects of U-Shape Inner Cooler on Flow and Solidification of Molten Steel in Slab Continuous Casting Mold

2011 ◽  
Vol 291-294 ◽  
pp. 423-427
Author(s):  
Yan Juan Jin ◽  
Xiao Chao Cui ◽  
Zhu Zhang
Keyword(s):  
Fluid Dynamics ◽  
Temperature Field ◽  
Flow Field ◽  
Continuous Casting ◽  
Molten Steel ◽  
Continuous Casting Mold ◽  
Slab Continuous Casting ◽  
Cooling Technology ◽  
Steel Flow

An inner-outer coupled cooling technology of molten steel for 1240×200mm slab continuous casting, that is to set an inner cooler—U shape pipes in the mold, is put forward in order to enhance the efficiency of transmitting heat and improve inner structure of billet. The flow status and solidification status of molten steel under coupling flow field and temperature field in inner-outer coupled cooling mold are simulated by using fluid dynamics software, and compare with those in traditional mold. It is found that setting inner cooler in the mold can make molten steel flow status even, which is favorable to floating up of the inclusion, quickening the solidification of steel liquid and improving the quality of billet.

Experimental study on surface quality of silicon ingots prepared by electromagnetic continuous casting

2012 ◽  
Vol 15 (4) ◽  
pp. 340-346 ◽  
Author(s):  
Feng Huang ◽  
Ruirun Chen ◽  
Jingjie Guo ◽  
Hongsheng Ding ◽  
Yanqing Su ◽  
...  
Keyword(s):  
Experimental Study ◽  
Continuous Casting ◽  
Surface Quality ◽  
Electromagnetic Continuous Casting

Quality Assessment of Machined Surfaces by an Optical Profilometer

2015 ◽  
Vol 669 ◽  
pp. 443-450
Author(s):  
Jana Gerková ◽  
Ľuboslav Straka
Keyword(s):  
Quality Assessment ◽  
Surface Quality ◽  
Production System ◽  
Head Movement ◽  
Movement Speed ◽  
Technological Parameters ◽  
Cutting Head ◽  
Optical Profilometer ◽  
Machined Surfaces

Technological parameters affecting the surface quality of cutting edges in production system with the AWJ technology include cutting head movement speed. The article examines and evaluates the quality of processed surface by the AWJ technology on selected materials as related to the change of cutting head movement speed. It was discovered that the movement speed for the AWJ technology has a significant effect on the surface quality

scholarly journals Problems of Analyzing Microstructure Images in Assessing the Impact of Technological Parameters of Combined Strain Wave Hardening on the Quality of the Surface Layer

2019 ◽  
Author(s):  
Андрей Киричек ◽  
Andrey Kirichek ◽  
Дмитрий Соловьев ◽  
Dmitriy Solovyev ◽  
Александр Хандожко ◽  
...  
Keyword(s):  
Surface Layer ◽  
Thermal Treatment ◽  
Strain Wave ◽  
Technological Parameters ◽  
Steel Microstructure ◽  
Main Indicator ◽  
Metallographic Images ◽  
Surface Layer Quality ◽  
The Impact

The problems of analyzing metallographic images and the method of their solution using modern software for the analysis of metallographic images are described. There is given an analysis of microstructure images as the main indicator of the surface layer quality by the example of studying the research results of strain wave hardening combinations and chemical-thermal treatment, in particular the influence of previous strain wave hardening and subsequent thermal and chemical- thermal treatment on the alloy steel microstructure or previous thermal and chemical- thermal treatment and subsequent strain wave hardening. On the basis of the analysis the effectiveness of strain wave hardening and chemical and thermal treatment is established.

scholarly journals Analysis of the surface quality of polycaprolactam 3D prints enriched with carbon and glass fiber

2021 ◽  
Vol 338 ◽  
pp. 01005
Author(s):  
Damian Dzienniak ◽  
Jan Pawlik
Keyword(s):  
Glass Fiber ◽  
Surface Quality ◽  
Fused Deposition Modeling ◽  
Polyamide 6 ◽  
Fiber Glass ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
The Impact ◽  
The Relationship

Additive manufacturing has been gaining popularity and availability year by year, which has resulted in its dynamic development. The most common 3D printing method as of today, FDM (Fused Deposition Modeling), owing to its peculiarity, does not always guarantee producing objects with low surface roughness. The authors of the present article have taken on the analysis of the impact of FDM printing on the roughness of the filament thus processed. They also investigate the relationship between the roughness of the unprocessed filament (made of polycaprolactam, that is, polyamide 6 or PA6) with admixtures of other materials (carbon fiber, glass fiber) and the surface quality of the manufactured object. The main subject of the analysis is the side surfaces of 3D prints, as it is their quality that is usually directly dependent on many factors connected with the process of the laying of the consecutive layers. The authors check step by step whether there exists a pronounced relationship between the roughness of the original filament material and the roughness of the obtained surface.

scholarly journals Experimental Research into Technology of Abrasive Flow Machining Nonlinear Tube Runner

2014 ◽  
Vol 6 ◽  
pp. 752353 ◽  
Author(s):  
Junye Li ◽  
Lifeng Yang ◽  
Weina Liu ◽  
Xuechen Zhang ◽  
Fengyu Sun
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Quality ◽  
Experimental Research ◽  
The Self ◽  
Technological Parameters ◽  
Abrasive Flow Machining ◽  
Overall Performance ◽  
Scanning Electron

In the fields of military and civil uses, some special passages exist in many major parts, such as non-linear tubes. The overall performance is usually decided by the surface quality. Abrasive flow machining (AFM) technology can effectively improve the surface quality of the parts. In order to discuss the mechanism and technology of abrasive flow machining nonlinear tube, the nozzle is picked up as the researching object, and the self-designed polishing liquid is employed to make research on the key technological parameters of abrasive flow machining linear tube. Technological parameters’ impact on surface quality of the parts through the nozzle surface topography and scanning electron microscopy (SEM) map is explored. It is experimentally confirmed that abrasive flow machining can significantly improve surface quality of nonlinear runner, and experimental results can provide technical reference to optimizing study of abrasive flow machining theory.

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