scholarly journals Experimental study on evolution of oxidation behavior on high-temperature continuous casting slab surface

2021 ◽  
Vol 11 ◽  
pp. 2049-2058
Author(s):  
Siyuan Zhang ◽  
Mujun Long ◽  
Haohao Zhang ◽  
Songyuan Ai ◽  
Dengfu Chen ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Temperature ◽  
Continuous Casting ◽  
Oxidation Behavior ◽  
Slab Surface ◽  
Continuous Casting Slab

Improvement of the Accuracy of High Temperature Slab Weight in Continuous Casting

2007 ◽  
Vol 26-28 ◽  
pp. 547-550
Author(s):  
Seong Yeon Kim ◽  
Yeong Seon Park ◽  
Jong Min Park
Keyword(s):  
High Temperature ◽  
Continuous Casting ◽  
Surface Temperature ◽  
Slab Surface ◽  
Slab Width ◽  
Continuous Casting Slab ◽  
Contraction Ratio ◽  
Weight Calculation ◽  
Slab Temperature ◽  
Measured Length

In continuous casting, slab weight is normally calculated just after torch cutting of slab using the process parameters and measured length. Because the weight is dependent on the slab temperature as well as slab width, the conventional method has the possibility of inaccuracy in calculated slab weight where contraction ratio of hot-slab was used in weight calculation. In this study, the slab width and surface temperature were measured using pyrometer simultaneously and used for determining the slab dimension and high temperature density. Slab density was formulated as a function of slab surface temperature and slab dimension. The accuracy of slab weight could be improved using this new measured method, and the slab could be cut with good matching weight with ordered-weight.

Surface Cracks Analysis on Continuous Casting Slab Q345c during Hot Delivery and Hot Charging

2013 ◽  
Vol 785-786 ◽  
pp. 1081-1086
Author(s):  
Sheng Zhao Wang ◽  
Gang Zhao ◽  
Si Qian Bao ◽  
Jian Chen ◽  
Li Wei Lu
Keyword(s):  
Tensile Strength ◽  
High Temperature ◽  
Continuous Casting ◽  
Surface Stress ◽  
Cooling Process ◽  
Finite Element Software ◽  
Continuous Casting Slab ◽  
Hot Crack ◽  
Strength Curve ◽  
High Temperature Tensile

The temperature field and stress field were simulated using the finite element software (ABAQUS) for Q345c continuous casting slab during cooling process. The hot ductility curve, high temperature tensile strength curve, and the surface stress value were obtained according to thermal simulation experiments. The results show that the temperature of brittleness zone is at 600-850°C, and the value of surface stress is larger than the high temperature tensile strength in the slab cooling process. The heat insulation device should be installed between the flame cutting machine and the heating furnace to avoid hot crack defects caused by excessive thermal stress on the surface in the process of hot slab delivery.

Analysis of Surface Temperature and Thermal Stress Field of Slab Continuous Casting

2009 ◽  
Vol 76-78 ◽  
pp. 554-559
Author(s):  
X.Z. Zhang ◽  
Zheng Yi Jiang ◽  
A. Kiet Tieu ◽  
Hong Tao Zhu ◽  
Z.W. Tian
Keyword(s):  
Thermal Stress ◽  
Continuous Casting ◽  
Slab Surface ◽  
Solidification Temperature ◽  
Slab Continuous Casting ◽  
Continuous Casting Slab ◽  
Thermal Stress Field ◽  
Slab Casting ◽  
Corner Cracks ◽  
Longitudinal Cracks

There are many defects on the surface of continuous casting slab, such as corner cracks, longitudinal cracks etc. To analyze the cracks and determine their locations, two-dimensional heat transfer mathematical model and thermal elasto-plastic stress model of slab casting were established in this paper. The process of solidification, temperature field, and thermal stress distribution on slab surface were analyzed using finite element method. The effect of thermal stress on the cracks on the slab surface was discussed. The location of the cracks caused by thermal stress can be predicted. This is useful for finding approaches to overcome these defects.

Positive Effects of High-Temperature Steel Creep Behavior on Continuous Casting Slab

2016 ◽  
Vol 723 ◽  
pp. 103-110
Author(s):  
Long Guo ◽  
Xing Zhong Zhang
Keyword(s):  
High Temperature ◽  
Continuous Casting ◽  
Creep Behavior ◽  
Casting Machine ◽  
Tensile Tests ◽  
Uniaxial Tensile ◽  
Secondary Creep ◽  
Creep Equation ◽  
Positive Effects ◽  
Continuous Casting Slab

Mechanical properties and creep behavior of continuous casting slab subjected to uniaxial tensile tests at 1100 and 1150 °C were considered in this paper. All of specimens was given a typical in-situ melting thermal history and interrupted cooling cycle before testing. An increase in load and temperature accelerates the creep rate thereby decreasing the steady state range. A new creep equation whose parameters are calculated by inverse-estimation using the regression analysis was proposed based on Norton-Bailey creep law. Primary and secondary creep stages could be described accurately by the new equation. Positive creep effects on straightening technology in continuous casting slab were presented in this paper. Involute continuous straightening technology could give full play to the role of steel creep deformation at high temperature. This research is helpful for the design of the new casting machine and improvement of old casting machine in using depended on high temperature creep behavior.

High-Temperature Creep Behaviour and Positive Effect on Straightening Deformation of Q345c Continuous Casting Slab

2018 ◽  
Vol 37 (3) ◽  
pp. 253-260
Author(s):  
Long Guo ◽  
Xingzhong Zhang
Keyword(s):  
High Temperature ◽  
Continuous Casting ◽  
Strain Rate ◽  
Creep Strain ◽  
Creep Behaviour ◽  
Casting Machine ◽  
Creep Strain Rate ◽  
High Temperature Creep ◽  
Temperature Creep ◽  
Continuous Casting Slab

AbstractMechanical and creep properties of Q345c continuous casting slab subjected to uniaxial tensile tests at high temperature were considered in this paper. The minimum creep strain rate and creep rupture life equations whose parameters are calculated by inverse-estimation using the regression analysis were derived based on experimental data. The minimum creep strain rate under constant stress increases with the increase of the temperature from 1000 °C to 1200 °C. A new casting machine curve with the aim of fully using high-temperature creep behaviour is proposed in this paper. The basic arc segment is cancelled in the new curve so that length of the straightening area can be extended and time of creep behaviour can be increased significantly. For the new casting machine curve, the maximum straightening strain rate at the slab surface is less than the minimum creep strain rate. So slab straightening deformation based on the steel creep behaviour at high temperature can be carried out in the process of Q345c steel continuous casting. The effect of creep property at high temperature on slab straightening deformation is positive. It is helpful for the design of new casting machine and improvement of old casting machine.

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