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Related Concept Videos

Steel Manufacturing01:26

Steel Manufacturing

623
Steel manufacturing is a multi-stage process that begins by smelting iron ore into cast iron in a blast furnace. This initial stage involves layering iron ore with coke, a type of fuel, and crushed limestone within the furnace. The coke is ignited with a high volume of air, leading to the creation of carbon monoxide, which acts to reduce the iron ore to pure iron.
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
623
Mechanical Characteristics of Steel01:18

Mechanical Characteristics of Steel

605
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
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Structural Steel Products01:24

Structural Steel Products

235
Structural steel products are created within a structural mill. The process begins with a beam blank that is reheated and then fed through a series of rollers. These rollers progressively shape the metal into its final form. Adjusting the spacings between the rollers allows for the production of different sections with the same nominal dimensions.
Once shaped, the steel's final form emerges as a continuous length, which is then segmented by a hot saw into manageable pieces. These segments...
235
Residual Stresses01:26

Residual Stresses

244
Residual stresses reside in a structure even after removing the original stress inducer. This phenomenon often arises from varied plastic deformations across different parts of a structure. Consider a rod stretched beyond its yield point. It will not regain its original length due to permanent deformation. Even after load removal, the rod does not entirely lose stress because of uneven plastic deformations, resulting in residual stresses. The computation of these stresses in structures is...
244
Thin-Walled Hollow Shafts01:15

Thin-Walled Hollow Shafts

212
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution...
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Steel Fastening Techniques01:17

Steel Fastening Techniques

184
Steel sections can be joined together through various fastening techniques including riveting, bolting, and welding, each suitable for different structural requirements and conditions.
Rivets are cylindrical steel fasteners with a specially designed head. During application, rivets are heated until white-hot and then inserted through pre-drilled holes in the steel sections. A pneumatic hammer is used to shape the exposed end into a second head, securing the sections together.
Bolting is another...
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An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature
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Research on Solid Shell Growth during Continuous Steel Casting.

Marek Velička1, René Pyszko1, Mario Machů1

  • 1Department of Thermal Engineering, Faculty of Materials Science and Technology, VSB-Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava, Czech Republic.

Materials (Basel, Switzerland)
|August 12, 2023
PubMed
Summary
This summary is machine-generated.

Accurate measurement of solidified steel shell thickness after a breakout is crucial for continuous casting. This study developed a 3D scanning method to measure shell thickness, verifying a numerical model.

Keywords:
breakoutcontinuous casting of steellaser scannermodellingshell thickness

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Area of Science:

  • Metallurgical Engineering
  • Materials Science

Background:

  • Continuous steel casting requires balancing production, quality, and safety, with breakouts posing significant risks.
  • Monitoring solidified shell thickness is vital for process control and preventing breakouts, but direct measurement during casting is challenging.
  • Breakouts offer a rare opportunity for direct measurement of shell thickness post-rupture.

Purpose of the Study:

  • To investigate the growth and measurement of the solid shell in a 410 mm diameter round steel block after a breakout.
  • To develop and validate an original methodology for direct shell thickness measurement.
  • To verify an existing numerical model of cooling and solidification using real-world data.

Main Methods:

  • Development of an original methodology using a 3D laser scanner to create a surface mesh of scanned parts.
  • Direct measurement of solidified shell thickness after a breakout event.
  • Regression analysis to determine the average shell thickness as a function of time.
  • Verification of a numerical cooling and solidification model with experimental data.

Main Results:

  • Significant variations in shell thickness were observed, with differences up to 6 mm between maximum and minimum values at the mould exit.
  • A regression function accurately described the average shell thickness growth over time.
  • The experimental data provided a basis for validating the numerical model's predictions.

Conclusions:

  • The developed 3D scanning methodology enables accurate direct measurement of solidified shell thickness after breakouts.
  • Observed shell thickness variations highlight the need for precise process control in continuous casting.
  • The study successfully verified the numerical model, improving its reliability for predicting steel shell growth.