continuous casting defects

Continuous Casting (metallurgy)

Continuous casting is the most efficient way to solidify large volumes of metal into simple shapes with consistent quality. It has been steadily replacing older ingot casting processes since it was developed in the 1950''s and 60''s. Compared with other casting processes, continuous casting generally has a higher capital cost, but lower operating cost. It produces "near-net shapes" that are closer to the final product shape, so require less subsequent deformation. This makes continuous casting …

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(PDF) CAUSES OF OCCURRENCE OF INTERNAL AND …

Frequency of occurrence of surface defects is also during continuous casting of steel slab mostly much more frequent, than frequency of occurrence of another defects. The surface defects can be divided into two groups, namely discontinuities of the type of cracks and bubbles.

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Advantages of the Continuous Casting Process | Benefits …

Continuous casting is a superior option to sand casting because of its speed and convenience. If you need bars made for your next project, don''t have them poured one by one in molds perfectly created for every part you need. By sawing metal bars into the you''ll ...

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Electromagnetic Effects on Solidification Defect Formation …

 · Understanding and reducing defects formed during continuous casting of steel are challenging because of the many inter-related, multiscale phenomena and process parameters involved in this complex process. Solidification occurs in the presence of turbulent multiphase flow, transport and capture of particles, superheat transport, and thermal–mechanical behavior. The application of ...

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Neural Network Modelling to Characterize Steel …

 · The defects arising from the steel continuous casting can be classified as surface defects, internal defects, form defects and mechanical defects. Longitudinal and transverse surface cracks are often found on continuously cast products which are sometimes difficult to eliminate during subsequent hot rolling giving rise to defects on the rolled product.

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Continuous casting

Continuous casting, also called strand casting, is the process whereby molten metal is solidified into a "semifinished" billet, bloom, or slab for subsequent rolling in the finishing mills. Prior to the introduction of continuous casting in the 1950s, steel was poured into stationary molds to form ingots..

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Casting defect

Casting defects may be defined as characteristics which create a deficiency or imperfection to quality specification imposed by design and service requirement. Casting defects are caused by non optimized process, failure of material, casting equipment. So the defects can be tolerated and repaired. In aluminum die casting the molten aluminum is poured or injected into metallic die. There are many sources to cast defects and have many names. In this paper an attempt has been made to provide al casting defects …

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Adding value by reducing quality defects in continuous …

Module 3 – Internal defects in continuous cast semis The formation of internal defects in continuou cast semis will be presented, focussing on the areas within the casting process where these issues manifest themselves, The methods of prevention for these

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Casting Defects : Types, Causes and Remedies

 · Today I will point out some common casting defects, its causes and remedies of it. The basic conditions which spark the defects in casting or the favorable conditions of casting defects are. 1. Defecting design of pattern. 2. Improper melting of metal. 3. Defects in mould. 4.

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Troubleshooting in continuous casting of steel slabs: …

 · Troubleshooting in continuous casting of steel slabs: shape and dimension issues Published on October 27, 2017 October 27, 2017 • 279 Likes • 18 Comments Report this post

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Defect and mould variable prediction in continuous casting

Defects which occur at the surface of a continuously cast slab impede the throughput of final product, because an extra stage in the process is required to grind the defects away before further processing can take place. Defect prediction and the minimization of the occurrence of defects is required. The use of two models to define the defect propagation is explained. Both models are derived using system identification techniques such as auto-regression with exogenous input (ARX). One model is used to determine the effect of manipulated variables such as casting speed and measured disturbances such as mould level on temperatures within the mould. The other is used to determine or indicate the effect of the mould temperatures on the occurrence of defects such as transversal cracks. The latter model can be used to predict when the defects will occur and the former can be used to control the occurrence of the defects.

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Investment Casting Defects Analysis |Remedies

 · Investment Casting Defects Analysis and Remedies In last article,we have introduced one of the biggest defects of investment casting—Crack. Beside it,there is also others defects happened during the production of investment precision castings.Here,we will ...

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Identifying the main defects appeared in the structure of continuous …

continuous casting machine over a period of several months, when we focused on the nature of the internal flaws that were found on reception of the material under study. Keywords— continuous casting, steel, internal flaws, fissures, micro-shrinkage, central, .

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Vol. 3, No. 5 Modeling of Continuous Casting Defects Related to …

Modeling of Continuous Casting Defects Related to Mold Fluid Flow Brian G. Thomas, Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, Urbana, Ill. ([email protected] ) Vol. 3, No. 5 July 2006 3 opening, and ...

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Types of Casting Defects and How to Prevent Them

 · Closed Shrinkage Defects Closed shrinkage appears in the form of holes inside of a casting, generally where a part of the liquid metal was hotter than the rest of the material. It can appear in macro or micro form. Micro shrinkage, also called shrinkage porosity, looks to the naked eye like jagged marks or lines.

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Surface Defect Formation in Steel Continuous Casting | …

Serious defects in the continuous casting of steel, including surface cracks and depressions, are often related to thermal mechanical behavior during solidification in the mold. A finite-element model has been developed to simulate the temperature, shape, and stress of the steel shell, as it moves down the mold in a state of generalized plane strain at the casting speed.

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continuous casting defects

continuous casting defects If you have any questions or good suggestions on our products and site, or if you want to know more information about our products, please write them and send to us, we will contact you within one business day. We

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(PDF) Analysis of Internal Defects Appeared in the …

Abstract. The paper presents the study of internal defects resulting from the continuous casting of steels. The 50 samples were taken. from a total of 20 continuously cast bits of different steel ...

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THE ANALYSIS OF DEFECTS ON CONTINUOUS CAST BILLETS

THE ANALYSIS OF DEFECTS ON CONTINUOUS CAST BILLETS INTRODUCTION Thanks to its excellent properties the steel production is in continuous progress: in 2000 - 885,7 Mt, 2002 - 945,1 Mt, and in 2004 - 1054 Mt. [1, 2]. From the produced amount of

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How to distinguish the quality defects of billets?

The quality of continuous casting slab determines the quality of final product, so in a broad sense, the quality of continuous casting slab refers to the severity of slab defects allowed by qualified products. Its meaning includes four aspects: The first is the purity of ...

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5 types of Sand casting defects and how to prevent to …

Here we introduce 5 major types of sand casting defects commonly see in metalworking. You will find the cause behind each casting defect as well as remedies to prevent for improving casting quality. Sand casting is the popular casting process in the metal foundry that creates the castings by forming the mold cavity in the sand container, pouring the molten metal, and breaking the sandbox to ...

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Finite element study of the effect of some local defects on the risk of transverse cracking in continuous casting …

This paper introduces a numerical 2.5D model of continuous casting of steel slabs. This model is based on the finite element method and it has been applied to the study of some local defects in a continuous caster, such as partial blockage of nozzles (leading

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Defects in Continuous Cast Steels – IspatGuru

 · The defects in the CC products arising during the process of continuous casting of steel can be classified as (i) surface defects, (ii) internal defects, (iii) shape defects, (iv) mechanical defects, and (v) deviations from the prescribed chemical composition of steel.

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REDUCTION OF SURFACE DEFECTS AND OPTIMIZATION OF CONTINUOUS CASTING …

Kovacic, Brezocnik: Reduction of Surface Defects and Optimization of Continuous Casting … 669 detected using thermocouples that were already installed in the mould. On the basis of real data, improved melt level control was implemented. The defects were

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(PDF) A REVIEW ON CAUSES OF INNTERNAL DEFECTS IN …

Defects in the Continuous casting billets are shaped during the production process due to several factors which include material related factors, casting speeds and temperatures, mould oscillation, phase transformation, casting powder, segregation coefficient of

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Research and Analysis on Defects of Continuous Casting …

Abstract: Aiming at the problem of squaring of continuous casting billets, the reasons for the squaring defects are analyzed, and the improvement of copper mould tube The structure of the device, strengthening the uniform cooling of the secondary cold water and other measures, achieve the purpose of eliminating the defects of cast blanks.

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6 Common Defects in Castings: Causes and Prevention …

Cracks are often associated with defects such as shrinkage and slag inclusion. It usually occurs at the inside of the sharp corner of the casting, where the thick and thin sections meet, and the hot junction area where the pouring riser is connected to the casting.

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[PDF] Modeling of continuous-casting defects related …

DEFECTS RELATED TO FLUID FLOW A schematic of the continuous casting process is given in Fig. 1, which illustrates some of the phenomena which lead to defects …

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Continuous Casting Solutions

To compound your dilemma, you only have established casting practices to rely on which are already at their limits of performance. A fresh perspective is needed. Kiss Technologies offers solutions for increasing yield in two key areas – gaining maximum yield from the ladle to the mold and increasing cast speed without risking downtime and quality downgrades.

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What is Casting Defects

 · Casting defects can be categorized into 5 types 1. Gas Porosity: Blowholes, open holes, pinholes 2. Shrinkage defects: shrinkage cavity 3. Mold material defects: Cut and washes, swell, drops, metal penetration, rat tail 4. Pouring metal defects: Cold shut

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Quality prediction in continuous casting of stainless steel slabs

The continuous casting of steel slabs is an established technology to solidify molten steel. Surface defects form during the continuous casting process. As a consequence of these defects, an intermediate grinding stage between casting and hot-rolling is needed ...

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Modeling of Continuous-Casting Defects Related to Mold Fluid Flow

Many quality problems that originate during the continuous casting of steel can be directly attributed to poor control of fluid flow conditions in the mold [1] . In order to optimize these flow design and operation conditions, it is crucially important to understand how

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CONTINUOUS CASTING

broken hoses in all types of continuous casting machines, and ensures that the strand is uniformly cooled during the continuous casting process. The steel is cooled by spray - ing water onto the strand through nozzles. To avoid surface defects and possible

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Defects in Continuous Cast Steels – IspatGuru

Modeling of Continuous-Casting Defects Related to Mold ...

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