Radially-polarised beam amplification in an Yb:YAG thin-slab architecture (Conference Presentation)

2017 ◽  
Author(s):  
Callum R. Smith ◽  
Stephen J. Beecher ◽  
Jacob I. Mackenzie ◽  
W. Andrew Clarkson
Keyword(s):  
Thin Slab

Numerical analysis of local heat flux and thin-slab solidification in a CSP funnel-type mold with electromagnetic braking

2020 ◽  
Vol 117 (6) ◽  
pp. 602
Author(s):  
Heping Liu ◽  
Jianjun Zhang ◽  
Hongbiao Tao ◽  
Hui Zhang
Keyword(s):  
Heat Flux ◽  
Casting Speed ◽  
Shell Growth ◽  
Local Heat ◽  
Operating Conditions ◽  
Thin Slab ◽  
Wide Face ◽  
Slab Width ◽  
Steel Grades ◽  
Local Heat Flux

In this article, based on the actual monitored temperature data from mold copper plate with a dense thermocouple layout and the measured magnetic flux density values in a CSP thin-slab mold, the local heat flux and thin-slab solidification features in the funnel-type mold with electromagnetic braking are analyzed. The differences of local heat flux, fluid flow and solidified shell growth features between two steel grades of Q235B with carbon content of 0.19%C and DC01 of 0.03%C under varying operation conditions are discussed. The results show the maximum transverse local heat flux is near the meniscus region of over 0.3 m away from the center of the wide face, which corresponds to the upper flow circulation and the large turbulent kinetic energy in a CSP funnel-type mold. The increased slab width and low casting speed can reduce the fluctuation of the transverse local heat flux near the meniscus. There is a decreased transverse local heat flux in the center of the wide face after the solidified shell is pulled through the transition zone from the funnel-curve to the parallel-cure zone. In order to achieve similar metallurgical effects, the braking strength should increase with the increase of casting speed and slab width. Using the strong EMBr field in a lower casting speed might reverse the desired effects. There exist some differences of solidified shell thinning features for different steel grades in the range of the funnel opening region under the measured operating conditions, which may affect the optimization of the casting process in a CSP caster.

scholarly journals Primary Recrystallization Behaviors of Hi-B Steel with Lower Initial Nitrogen Produced by the Thin Slab Casting and Rolling Process

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 189
Author(s):  
Bing Fu ◽  
Li Xiang ◽  
Jia-Long Qiao ◽  
Hai-Jun Wang ◽  
Jing Liu ◽  
...  
Keyword(s):  
Grain Size ◽  
Electron Microscope ◽  
Nitrogen Content ◽  
Rolling Process ◽  
Primary Recrystallization ◽  
Thin Slab ◽  
Nitriding Temperature ◽  
Thin Slab Casting ◽  
Slab Casting ◽  
Inhomogeneity Factor

Based on low-temperature high-permeability grain-oriented silicon steel designed with an initial nitrogen content of 0.0055% and produced by the thin slab casting and rolling process, the effect of total nitrogen content and nitriding temperature on primary recrystallization microstructure and texture were studied by optical microscope, scanning electron microscope, transmission electron microscope, and electron backscatter diffraction. The nitriding temperature affects the primary recrystallization behaviors significantly, while the total nitrogen content has a small effect. As the nitriding temperature is 750–850 °C, the average primary grain size and its inhomogeneity factor are about 26.58–26.67 μm and 0.568–0.572, respectively. Moreover, the texture factor is mostly between 0.15 and 0.40. Because of the relatively sufficient inhibition ability of inherent inhibitors in a decarburized sheet, the nitriding temperature (750–850 °C) affects the primary recrystallization microstructure and texture slightly. However, as the nitriding temperature rises to 900–950 °C, the average primary grain size and its inhomogeneity factor increase to 27.75–28.26 μm and 0.575–0.578, respectively. Furthermore, because of the great increase on the area fraction of {112} <110> grains, part of texture factor is increased sharply. Therefore, in order to obtain better primary grain size and homogeneity, better texture composition, and stability of the decarburized sheet, the optimal nitriding temperature is 750–850 °C.

scholarly journals High spatial resolution whole‐neck MR angiography using thin‐slab stack‐of‐stars quiescent interval slice‐selective acquisition

2020 ◽  
Vol 84 (6) ◽  
pp. 3316-3324
Author(s):  
Ioannis Koktzoglou ◽  
Rong Huang ◽  
Archie L. Ong ◽  
Pascale J. Aouad ◽  
Matthew T. Walker ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Mr Angiography ◽  
High Spatial Resolution ◽  
Thin Slab ◽  
Stack Of Stars

Numerical Investigation of Shell Formation in Thin Slab Casting of Funnel-Type Mold

2014 ◽  
Vol 45 (3) ◽  
pp. 1024-1037 ◽  
Author(s):  
A. Vakhrushev ◽  
M. Wu ◽  
A. Ludwig ◽  
Y. Tang ◽  
G. Hackl ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Shell Formation ◽  
Thin Slab ◽  
Thin Slab Casting ◽  
Slab Casting

Effect of Precursory Cooling on Falling-Film Rewetting

1975 ◽  
Vol 97 (3) ◽  
pp. 360-365 ◽  
Author(s):  
K. H. Sun ◽  
G. E. Dix ◽  
C. L. Tien
Keyword(s):  
Atmospheric Pressure ◽  
Present Model ◽  
Front Velocity ◽  
Falling Film ◽  
Vapor Mixture ◽  
Thin Slab ◽  
Flow Rates ◽  
Variable Flow ◽  
Order Of Magnitude ◽  
Hot Surface

An analytical model for falling-film wetting of a hot surface has been developed to account for the effect of cooling by droplet-vapor mixture in the region immediately ahead of the wet front. The effect of precursory cooling is characterized by a heat transfer coefficient decaying exponentially from the wet front. Based on the present model, the wet front velocity, as well as the temperature profile along a thin slab, can be calculated. It is demonstrated that the precursory cooling can increase the wet front velocity by an order of magnitude. Existing experimental data with variable flow rates at atmospheric pressure are shown to be successfully correlated by the present model.

scholarly journals Case study of severe strip breakage in rolling mill of Thin Slab Casting and Rolling (TSCR) shop of TATA Steel, Jamshedpur

2016 ◽  
Vol 5-6 ◽  
pp. 15-22 ◽  
Author(s):  
Diptak Bhattacharya ◽  
Avinash Mishra ◽  
Ganga Prasad Poddar ◽  
Siddhartha Misra
Keyword(s):  
Rolling Mill ◽  
Thin Slab ◽  
Thin Slab Casting ◽  
Slab Casting
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