Effects of casting speed on microstructure and segregation of electro-magnetically stirred Aluminum alloy in continuous casting process

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.

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

Metals ◽

10.3390/met9090993 ◽

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%.

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4032 aluminum alloy billet fabricated by continuous casting process with heat insulating and rapid cooling mold

Journal of Japan Institute of Light Metals ◽

10.2464/jilm.58.650 ◽

2008 ◽

Vol 58 (12) ◽

pp. 650-655 ◽

Cited By ~ 2

Author(s):

Hidetoshi Takagi ◽

Yasuhiro Uetani ◽

Masayoshi Dohi ◽

Toru Watanabe ◽

Tomokazu Yamashita ◽

...

Keyword(s):

Aluminum Alloy ◽

Continuous Casting ◽

Casting Process ◽

Continuous Casting Process ◽

Rapid Cooling

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Microstructure as an essential aspect of EN AW 7075 aluminum alloy quality influenced by electromagnetic field during continuous casting process

Hemijska industrija ◽

10.2298/hemind201214006p ◽

2021 ◽

Vol 75 (1) ◽

pp. 31-37

Author(s):

Aleksandra Pataric ◽

Marija Mihailovic ◽

Branislav Markovic ◽

Miroslav Sokic ◽

Andreja Radovanovic ◽

...

Keyword(s):

Mechanical Properties ◽

Electrical Conductivity ◽

Electromagnetic Field ◽

Aluminum Alloy ◽

Continuous Casting ◽

Cast Alloy ◽

Casting Process ◽

Cast Aluminum Alloy ◽

Cast Aluminum ◽

Continuous Casting Process

Microstructure assessment is crucial for the design and production of high-quality alloys such as cast aluminum alloy ingots. Along with the effect of a more homogeneous microstructure to result in much better mechanical properties, better as-cast alloy quality indicates a higher efficiency of the aluminum alloys production process. During the aluminum alloy solidification process many microstructural defects can occur, which deteriorate the mechanical properties and hence decrease the usability of such an ingot. Application of the electromagnetic field during the vertical continuous casting process significantly reduces occurrence of these defects. In the present study, EN AW 7075 alloy samples were cast with and without application of an electromagnetic field and examined regarding the microstructure, electrical conductivity, and changes in the phase composition. The obtained results clearly show that it is possible to decrease or avoid casting defects by the electromagnetic field application as verified by the microstructure characterization and quantification, electrical conductivity tests and differential thermal analysis (DTA).

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A note on casting speed of Ohno continuous casting process

Materials Science and Technology ◽

10.1179/174328409x411844 ◽

2010 ◽

Vol 26 (8) ◽

pp. 1015-1016 ◽

Cited By ~ 2

Author(s):

H. Soda ◽

A. McLean ◽

G. Motoyasu

Keyword(s):

Continuous Casting ◽

Casting Speed ◽

Casting Process ◽

Continuous Casting Process

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

Science and Engineering of Composite Materials ◽

10.1515/secm-2015-0137 ◽

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.

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Influence of Continuous Casting Conditions on Segregation of Additions in EN AW 1350 Aluminum Alloy

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.682.205 ◽

2016 ◽

Vol 682 ◽

pp. 205-211

Author(s):

Radosław Kowal ◽

Tadeusz Knych ◽

Andrzej Mamala ◽

Paweł Kwaśniewski ◽

Wojciech Ściężor ◽

...

Keyword(s):

Aluminum Alloy ◽

Chemical Composition ◽

Continuous Casting ◽

Production Process ◽

Casting Speed ◽

Casting Process ◽

Point Of View ◽

Crystallization Zone ◽

Spectroscopy Studies

Integrated continuous casting processes are an important element of the production process in modern industry. Requirements for quality and exploitation properties of products obtained using continuous casting processes necessitate a revision of the role of impurities distribution in the material. This paper concerns on the influence of the casting process on the distribution of alloy additions. Spectroscopy studies were performed for the most sensitive elements, from the segregation, (i.e. : iron and silicon) point of view. Next obtained research results were correlated with the parameters of chemical composition such as casting speed, the presence of a modifier and the processing of metal crystallization zone. Analysis of the results clearly shows the presence of iron and silicon normal macrosegregation. It was observed that the concentration of these elements is highest in the casting axis and, in the case of iron, is 50% higher in the axis than in the circumference of casts.

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