Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Cast steel."”.
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Ultra wide gap brazing of high temperature cast steel boiler valves
Includes bibliographical references (pages 77-80).
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Development of Stage-I tempered high strength cast steel for ground engaging tools
… obtaining a high strength and impact resistant cast steel. Cast iterations of <em>Cr-Ni-Mo </em>alloy series were used to develop a low nitrogen induction melting practice (N< 80 ppm) along with an effective deoxidation. Size of ground Si-Zr addition controls final ZrN particle size. Good …
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The Effect of Newer Methods of Processing on the Fatigue Strength of Cast Steel
… the microstructure and mechanical properties of cast steel, particularly the fatigue strength, has been investigated.<br/><br/>It is shown that microporosity in cast steel reduces the elongation, reduction in area, and the fatigue strength. However, hot isostatic pressing at an argon pressure of …
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Transient thermo-fluid model of meniscus behavior and slag consumption in steel continuous casting
… mold wall, the slag rim, the slag/liquid steel interface, and the solidifying steel shell, are of immense importance for the surface quality of continuous-cast steel. A computational model of the meniscus region has been developed, that includes transient heat transfer, multi-phase fluid …
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An expert system to diagnose quality problems in the continuous casting of steel billets
… and breakouts are often observed in continuously cast steel billets. Although information is available in the literature on the causes of, and solutions to, these problems, the transfer of this knowledge to operating personnel is not always an easy task. To address this issue, an expert system has …
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Investigation of meniscus region behavior and oscillation mark formation in steel continuous casting using a transient thermo-fluid model
In the continuous casting of steel, many complex phenomena in the meniscus region of the mold are responsible for the formation of oscillation marks. Oscillation marks are depressions found around the perimeter of continuously cast steel slabs, which if too large can lead to cracking in steel …
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Hot ductility and its relationship to transverse cracking in steels
The influence of the Ara on the hot ductility of steels was examined. Tensile samples were heated to 1603K, cooled at 60Kmin" and tested in the temperature range 1323-873K at a strain rate of 3x10-3S-1. The Ara was altered by variations in C, (0.1 to 0.15%C), Mn, (0.6 to 1.4%Mn), Si (0.1 to 0.5%Si) …
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Development of a generalized fatigue assessment approach for steel castings.
… a generalized fatigue assessment approach for steel castings for a range of internal casting quality details. In particular, this project examined the effect of quality details on the fatigue performance of steel castings using linear elastic fracture mechanics (LEFM) analysis. This is a …
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Enhancing Corrosion Resistance and Hardness Properties of High-Carbon Steel and Aluminium Bronze Alloy Through Novel Surface Modification Technique
High carbon steel has been extensively utilised in various industrial applications, due to its consequential importance to strength-hardness balance and relatively low cost. With a mediocre level of corrosion resistance, the improvement is very important to extend its serviceability. Studied steels …
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Thermo-mechanical model of steel shell behavior in continuous slab casting
… influence on the final quality of continuously-cast steel slabs. In order to understand the thermal and mechanical behavior of the shell, a two-dimensional transient stepwise-coupled finite-element model has been developed. The model simulates a transverse section of the slab as it moves down …
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Rejection of periodic disturbances in uncertain nonlinearly perturbed stable infinite dimensional systems
… in the mold oscillation system of a continuous caster is addressed. The mold oscillation system consists of a subsystem of beams hinged at the center supporting the mold at one end and excited by an electro-hydraulic actuator at the other end. The actuator piston is attached to the beam …