The Mould Flux Heat Conduction Performance Designing of High Carbon Steel for Thin Slab Continuous Casting

2014 ◽  
Vol 1033-1034 ◽  
pp. 1313-1316
Author(s):  
Hui Rong Li ◽  
Li Gen Sun ◽  
Li Qun Ai
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Carbon Steel ◽  
Continuous Casting ◽  
Orthogonal Experiment ◽  
High Carbon Steel ◽  
Thin Slab ◽  
High Carbon ◽  
Slab Continuous Casting ◽  
Mould Flux

Heat transfer of the mould flux between the mould and the strand is very complicated, especially for the high carbon steel thin slab continuous casting. In this research the orthogonal experiment has been carried out, and the results showed that: the effect for the heat flux form strong to weak is: R>Na2O>F>MgO>BaO. and in the experiment range, with the R increasing, when the R, Na2O content and the F- content are increasing, the heat flux would be decreasing; with the MgO content increasing, the crystallization temperature would getting fluctuant; with the BaO content increasing, the heat flux would getting fluctuant, when its content is around 6%, the heat flux is reach its summit.

The Mould Flux Viscosity Designing of High Carbon Steel for Thin Slab Continuous Casting

2014 ◽  
Vol 1022 ◽  
pp. 48-51
Author(s):  
Hui Rong Li ◽  
Li Gen Sun ◽  
Li Qun Ai
Keyword(s):  
Carbon Steel ◽  
Continuous Casting ◽  
Melting Temperature ◽  
Orthogonal Experiment ◽  
High Carbon Steel ◽  
Thin Slab ◽  
High Carbon ◽  
Slab Continuous Casting ◽  
Mould Flux

Viscosity is very important for the high carbon steel for thin slab continuous casting, in this research the orthogonal experiment has been carried out, and the results showed that: the effect for the flux viscosity form strong to weak is: R>F>BaO>Na2O>MgO. and in the experiment range, with the R increasing, when the R is between 0.80 and 0.90, the flux viscosity is diminished slowly; but when the R is bigger than 0.90, the flux viscosity is diminished sharply; Na2O,MgO and F- could decrease the flux viscosity; BaO could lower the melting temperature of the flux to decrease the flux viscosity.

The Mould Flux Crystallization Properties Designing of High Carbon Steel for Thin Slab Continuous Casting

2014 ◽  
Vol 1022 ◽  
pp. 52-55
Author(s):  
Hui Rong Li ◽  
Li Gen Sun ◽  
Li Qun Ai
Keyword(s):  
Carbon Steel ◽  
Continuous Casting ◽  
Crystallization Temperature ◽  
Orthogonal Experiment ◽  
High Carbon Steel ◽  
Thin Slab ◽  
High Carbon ◽  
Slab Continuous Casting ◽  
Crystallization Properties ◽  
Mould Flux

Crystallization temperature is very important for the high carbon steel for thin slab continuous casting, in this research the orthogonal experiment has been carried out, and the results showed that: the effect for the flux crystallization temperature form strong to weak is: F>Na2O>R>BaO>MgO. In the experiment range, with the R, Na2O, MgO and F- content increasing, the flux crystallization temperature would be higher, but for the complicated infect of the Na2O and F-, there are some flucuations for the flux crystallization temperature, but for the BaO content increasing, the crystallization temperature of the flux would be decreasing slowly.

Effects of Na2CO3 on properties of low fluoride content mould flux for thin slab continuous casting

2011 ◽  
Vol 23 ◽  
pp. S167-S169 ◽  
Author(s):  
Yanqing Lu ◽  
Guodong Zhang ◽  
Maofa Jiang ◽  
Haixiao Liu ◽  
Ting Li
Keyword(s):  
Continuous Casting ◽  
Fluoride Content ◽  
Thin Slab ◽  
Slab Continuous Casting ◽  
Mould Flux

Effects of NaF on Mould Flux Properties for Thin Slab Continuous Casting

2012 ◽  
Vol 455-456 ◽  
pp. 134-138 ◽  
Author(s):  
Yan Qing Lu ◽  
Guo Dong Zhang ◽  
Xiao Feng Yu
Keyword(s):  
Continuous Casting ◽  
Thin Slab ◽  
Slab Continuous Casting ◽  
Mould Flux

Application of Differential Transform Method for Estimating Thermal Cycle Developed in GTA Welding of High Carbon Steel Joints

2015 ◽  
Vol 14 ◽  
pp. 37-48
Author(s):  
Jaideep Dutta ◽  
S. Narendranath ◽  
Aleksandr Zhilin
Keyword(s):  
Heat Flux ◽  
Temperature Distribution ◽  
Carbon Steel ◽  
Cooling Rate ◽  
High Carbon Steel ◽  
Differential Transform Method ◽  
Temperature Cycle ◽  
High Carbon ◽  
Transform Method ◽  
Differential Transform

This article reveals a detailed study of temperature cycle formed during Gas Tungsten Arc welding of high carbon steel (AISI 1090) butt joints. Experimental work has been carried out to estimate the temperature distribution along fusion boundary to longitudinal direction of the weldment by mounting thermocouples on the plate along with Data Acquisition System. Heat flux distribution due to moving point heat source has been demonstrated by implementing Gaussian surface heat flux and Angular Torch model. Cooling rate has predicted by application of Adams cooling rate equation. Conduction-convection phenomena plays dominant role for evaluating heat loss from the weld joint and Differential Transform Method (DTM) has been applied to judge non-dimensional temperature distribution. Analytical studies has shown well agreement with experimental temperature distribution.

Deformation and Structure Difference of Steel Droplets during Initial Solidification

2017 ◽  
Vol 36 (4) ◽  
pp. 347-357 ◽  
Author(s):  
Yang Li ◽  
Jing Wang ◽  
Jiaquan Zhang ◽  
Changgui Cheng ◽  
Zhi Zeng
Keyword(s):  
Carbon Steel ◽  
Continuous Casting ◽  
High Carbon Steel ◽  
Low Carbon Steel ◽  
Carbon Steels ◽  
Solidification Structure ◽  
Low Carbon ◽  
High Carbon ◽  
Peritectic Steel ◽  
Initial Solidification

AbstractThe surface quality of slabs is closely related with the initial solidification at very first seconds of molten steel near meniscus in mold during continuous casting. The solidification, structure, and free deformation for given steels have been investigated in droplet experiments by aid of Laser Scanning Confocal Microscope. It is observed that the appearances of solidified shells for high carbon steels and some hyper-peritectic steels with high carbon content show lamellar, while that for other steels show spherical. Convex is formed along the chilling direction for most steels, besides some occasions that concave is formed for high carbon steel at times. The deformation degree decreases gradually in order of hypo-peritectic steel, ultra-low carbon steel, hyper-peritectic steel, low carbon steel, and high carbon steel, which is consistent with the solidification shrinkage in macroscope during continuous casting. Additionally, the microstructure of solidified shell of hypo-peritectic steel is bainite, while that of hyper-peritectic steel is martensite.

Interfacial Heat Flux Estimation in a Funnel Shaped Mould and Analysis of Solidification Characteristics in Thin Slab Continuous Casting

2021 ◽  
Author(s):  
Pedduri Jayakrishna ◽  
Ananda Vaka ◽  
Saurav Chakraborty ◽  
Suvankar Ganguly ◽  
Prabal Talukdar
Keyword(s):  
Heat Flux ◽  
Continuous Casting ◽  
Molten Steel ◽  
High Speed ◽  
Thermal Characteristics ◽  
Submerged Entry Nozzle ◽  
Casting Process ◽  
Transfer Model ◽  
Thin Slab ◽  
Slab Continuous Casting

Abstract An inverse heat transfer model based on Salp Swarm optimization algorithm is developed for prediction of heat flux at the hot faces of a mould in thin slab continuous casting. The industrial mould considered in this work is a funnel-shaped mould having complex arrangement of cooling slots and holes. Significant variations of heat flux along the casting direction, as well as across the width are observed. Subsequently, the obtained heat flux profile estimated by the inverse method is used to analyse the fluid flow and thermal characteristics of the solidifying steel strand inside the mould. Three different recirculatory zones are present due to molten steel flow, affecting the thermal and solidification characteristics significantly. The effect of these recirculatory flows on remelting phenomenon, and consequent formation of thinner shell at the mould outlet leading to quality control issues in the casting process have been discussed. Another practical issue of depression in the wide face shell thickness at the mould outlet has been identified, and its cause has been related to the location of the Submerged Entry Nozzle and the high speed of the molten steel inflow.

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