Effect of Strain Rate on Nb(C,N) Precipitation in Micro Alloy Steel Slab

2012 ◽  
Vol 535-537 ◽  
pp. 633-638 ◽  
Author(s):  
Zheng Hai Zhu ◽  
Sheng Tao Qiu
Keyword(s):  
Continuous Casting ◽  
Strain Rate ◽  
Alloy Steel ◽  
Casting Speed ◽  
Casting Process ◽  
Continuous Casting Process ◽  
Precipitation Model ◽  
Strain And Strain Rate ◽  
Steel Slab

It was analyzed by strain-induced precipitation model that Nb(C,N) precipitation in micro alloy steel slab was effected by strain rate during continuous casting process. The results are as follows: The changing of casting speed could effect the time for 5%precipitation of Nb(C,N), which was decreasing with increasing casting speed at certain temperature and strain rate. Slab strain and strain rate were too small in bending zone and leveling zone. The effect of slab strain rate on Nb(C,N) precipitation could be ignore when Nb(C,N) precipitation in continuous casting process was studied.

scholarly journals Acquiring High-Quality Oil Casing Steel 26CrMoVTiB under Optimal Continuous Casting Process Conditions

Metals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 993
Author(s):  
Yingying Zhai ◽  
Kefeng Pan ◽  
Dapeng Wu
Keyword(s):  
Continuous Casting ◽  
Water Flow ◽  
Process Parameters ◽  
Casting Speed ◽  
Casting Process ◽  
Solidification Structure ◽  
Process Conditions ◽  
Equiaxed Crystal ◽  
Continuous Casting Process ◽  
Simulation Results

While the solidification macrostructure of continuous cast billets is an important factor influencing the final performance and rolling yield of oil casing steel, the continuous casting process parameters have a direct influence on the solidification structure. This study simulated the solidification process of the continuous casting round billets of oil casing steel using a cellular automaton–finite element (CAFE) model. According to the simulation results, at a superheat degree of 20–35 K, a casting speed of 1.9–2.1 m/min, and a secondary cooling specific water flow of 0.34–0.45 L/Kg, the solidification structure had a relatively high equiaxed crystal ratio and small average grain radius. Guided by the simulation results, this paper establishes optimal process schemes for producing 26CrMoVTiB steel round billets, comparatively analyzes the equiaxed crystal ratio and central shrinkage of round billets produced according to these schemes, and defines the optimal continuous casting process conditions, which are: superheat degree = 25 K, casting speed = 2.1 m/min, and specific water flow = 0.35 L/Kg. When adopting these process parameters, the 26CrMoVTiB steel round billets demonstrate a tiny central shrinkage and an equiaxed crystal ratio of 45.2%.

Numerical Simulation on Optimization of Center Segregation for 50CrMo Structural Alloy Steel

2016 ◽  
Vol 35 (6) ◽  
pp. 583-589 ◽  
Author(s):  
Xiangzhou Gao ◽  
Shufeng Yang ◽  
Jingshe Li ◽  
Hang Liao
Keyword(s):  
Continuous Casting ◽  
Alloy Steel ◽  
Process Parameters ◽  
Casting Process ◽  
Heat Transfer Process ◽  
Equiaxed Crystal ◽  
Secondary Cooling ◽  
Structural Alloy ◽  
Continuous Casting Process ◽  
Cooling Intensity

AbstractTo improve the center segregation of billet for 50CrMo structural alloy steel, a 3D numerical model of solidification and heat transfer process for continuous casting had been established. The influence law of continuous casting process parameters on the secondary dendrite arm spacing (SDAS) and equiaxed crystal ratio had been obtained. It was shown that reducing superheat and casting speed and increasing the secondary cooling intensity could decrease SDAS. Reducing any one of the three parameters could increase the equiaxed crystal ratio. Adjusting only secondary cooling intensity could not make the SDAS and equiaxed crystal ratio change in the desired direction, but regulating the other two parameters could supply this gap. After optimizing the continuous casting process parameters of 50CrMo billet, the defect of center segregation was solved basically.

A note on casting speed of Ohno continuous casting process

2010 ◽  
Vol 26 (8) ◽  
pp. 1015-1016 ◽  
Author(s):  
H. Soda ◽  
A. McLean ◽  
G. Motoyasu
Keyword(s):  
Continuous Casting ◽  
Casting Speed ◽  
Casting Process ◽  
Continuous Casting Process

Influence of casting speed on fabricating Al-1%Mn and Al-10%Si alloy clad slab

2017 ◽  
Vol 24 (3) ◽  
pp. 371-378
Author(s):  
Yingshui Yu ◽  
Jinchuan Jie ◽  
Jianbo Sun ◽  
Tingju Li
Keyword(s):  
Continuous Casting ◽  
Casting Speed ◽  
Liquid Fraction ◽  
Casting Process ◽  
Tensile Tests ◽  
Cooling Zone ◽  
Continuous Casting Process ◽  
Engineering Software ◽  
Metallurgical Bonding ◽  
Simulation Results

AbstractIn this paper, the effect of casting speed on fabricating Al-1%Mn and Al-10%Si alloy clad slab was investigated. Before the trials with the semi-continuous casting process were conducted, a series of simulation with the engineering software FLUENT was made to forecast the influence of the casting speed on the temperature field and the liquid fraction of the clad slab. The simulation results indicated that the increase of the casting speed reduces the time in the cooling zone, thus the thickness of the Al-1%Mn solidification shell under the dividing plate gets thinner. Based on the simulation results, the Al-1%Mn alloy and Al-10%Si alloy clad slab was successfully produced by semi-continuous casting process. The interface of clad ingots was investigated by methods of metallographic and electron probe microanalysis. The tests on the interface confirmed the simulation results and showed that a clad slab of two different aluminum alloys with excellent metallurgical bonding was achieved by semi-continuous casting. According to the result of the tensile tests, the strength of the specimens remains at 110 MPa, and the fracture position located in the Al-1%Mn alloy indicates that the strength of the interface is higher than that of the Al-1%Mn alloy.

The effects of casting speed on steel continuous casting process

2011 ◽  
Vol 47 (12) ◽  
pp. 1601-1609 ◽  
Author(s):  
Mohammad Sadat ◽  
Ali Honarvar Gheysari ◽  
Saeid Sadat
Keyword(s):  
Continuous Casting ◽  
Casting Speed ◽  
Casting Process ◽  
Continuous Casting Process ◽  
Steel Continuous Casting

Modeling of Spray Cooling with a Moving Steel Slab during the Continuous Casting Process

2018 ◽  
Vol 90 (4) ◽  
pp. 1800393 ◽  
Author(s):  
Haibo Ma ◽  
Justina Lee ◽  
Kaile Tang ◽  
Rui Liu ◽  
Michael Lowry ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Casting Process ◽  
Spray Cooling ◽  
Continuous Casting Process ◽  
Steel Slab

Surface Roughness of Cu-Be Alloy (C17200) Rod Alloy Produced by Horizontal Type Continuous Casting Process

2007 ◽  
Vol 26-28 ◽  
pp. 551-554
Author(s):  
Sang Kil Lee ◽  
H.S. Lee ◽  
Sung Chul Lim ◽  
T.K. Jung ◽  
K.H. Kim ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Continuous Casting ◽  
Casting Speed ◽  
Casting Process ◽  
Casting Method ◽  
Continuous Casting Process ◽  
Furnace Temperature ◽  
High Casting Speed ◽  
Speed Range ◽  
Horizontal Type

Cu-Be alloy (C17200) rod having diameter of 23.5mm was produced by a vacuum continuous casting method at furnace temperature range of from 1240°C to 1260°C with casting speed range of from 35mm/min to 103mm/min. When the furnace temperature was 1240°C and 1250°C, Cu-Be alloy rod without fracture could successfully produced at high casting speed of 103mm/min. However, when the furnace temperature was 1260°C, the breakout occurred at casting speed faster than 78mm/min. Surface roughness (Ra) increased with increasing not only a furnace temperature but also a casting speed.

Analysis and Control of Micro-Alloy Steel in Continuous Casting Process

2012 ◽  
Vol 203 ◽  
pp. 304-309 ◽  
Author(s):  
Xia Hong ◽  
Zhong Bo Dong ◽  
Zhi Zheng Yang
Keyword(s):  
Continuous Casting ◽  
Incidence Rate ◽  
Alloy Steel ◽  
Deformation Process ◽  
Thermal Deformation ◽  
Casting Process ◽  
Precipitation Behavior ◽  
Continuous Casting Process ◽  
Process Study ◽  
And Control

The paper analyzes the precipitation behavior of micro-alloy elements including Nb, V, Ti and its effect to ductility of the steel during thermal deformation process, study on relationship between Nb, C content and slab crack incidence rate, supply countermeasures to control crack incidence rate during continuous casting course from components adjustment and process discipline optimization.

scholarly journals An Experimental Investigation of Continuous Casting Process: Effect of Pouring Temperatures on the Macrosegregation and Macrostructure in Steel Slab

2020 ◽  
Vol 23 (4) ◽  
Author(s):  
Fernando Paulucio Quinelato ◽  
Wysllan Jefferson Lima Garção ◽  
Késsia Gomes Paradela ◽  
Roberto Carlos Sales ◽  
Luis Antônio de Souza Baptista ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Continuous Casting ◽  
Casting Process ◽  
Continuous Casting Process ◽  
Steel Slab
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