The Influence of Electromagnetic Stirring on Primary Structure of Pure Al and Al-Si Alloy

2013 ◽  
Vol 746 ◽  
pp. 478-483
Author(s):  
Tomasz Wróbel
Keyword(s):  
Electromagnetic Field ◽  
Liquid Metal ◽  
Primary Structure ◽  
Transverse Section ◽  
Structure Refinement ◽  
Electromagnetic Stirring ◽  
Metal Bath ◽  
Average Area ◽  
Elevated Frequency ◽  
Forced Movement

In paper problem concerning inoculation of primary structure of Al with purity of 99,5% and 99,8% and AlSi2 alloy, which is realized mainly by intensification of liquid metal movement in mould is presented. In aim of realization of forced movement during the crystallization of liquid metal was used horizontal electromagnetic field produced by the induction coil (stirrer) supplied by current with elevated frequency. The degree of structure refinement was represented mainly by equiaxed crystals zone content on transverse section of ingot and average area of macro-grain in this zone. Effect of structure refinement obtained by influence of electromagnetic stirring was compared with refinement obtained by use of traditional inoculation, which consists in introducing of additives i.e. titanium, boron and strontium to metal bath. The results of studies and their analysis show possibility of effective refinement of pure Al and Al-Si alloy primary structure, only with use of horizontal electromagnetic field and without necessity of application of inoculants such a Ti and B. This method of inoculation is important, because inoculants decrease the degree of purity and electrical conductivity of pure Al. Moreover inoculants are reason of point cracks formation during rolling of ingots.

Transformation of Pure Al Structure under the Influence of Electromagnetic Field

2013 ◽  
Vol 702 ◽  
pp. 159-164
Author(s):  
Tomasz Wróbel
Keyword(s):  
Electromagnetic Field ◽  
Liquid Metal ◽  
Primary Structure ◽  
Transverse Section ◽  
Structure Refinement ◽  
Metal Bath ◽  
Average Area ◽  
Elevated Frequency ◽  
Forced Movement ◽  
Effect Of Structure

In paper problem concerning inoculation of primary structure of aluminum with purity of 99,5% and 99,8%, which is realized mainly by intensification of liquid metal movement in mould is presented. In aim of realization of forced movement during the crystallization of liquid metal was used rotating electromagnetic field produced by the induction coil supplied by current with elevated frequency. The degree of structure refinement was represented by equiaxed crystals zone content on transverse section of ingot and average area of macro-grain in this zone. Effect of structure refinement obtained by influence of electromagnetic field was compared with refinement obtained by use of traditional inoculation, which consists in introducing of additives i.e. titanium, boron and carbon to metal bath. The results of studies and their analysis show possibility of effective refinement of pure Al primary structure, only with use of rotating electromagnetic field and without necessity of application of inoculants such a Ti, B and C. This method of inoculation is important, because inoculants decrease the degree of purity and electrical conductivity of pure Al. Moreover Ti and B are reason of point cracks formation during rolling of ingots.

Modification of Pure Al and AlSi2 Alloy Primary Structure with Use of Electromagnetic Stirring Method

2013 ◽  
Vol 58 (3) ◽  
pp. 941-944 ◽  
Author(s):  
T. Wróbel ◽  
J. Szajnar
Keyword(s):  
Electromagnetic Field ◽  
Liquid Metal ◽  
Primary Structure ◽  
Structure Refinement ◽  
Induction Coil ◽  
Electromagnetic Stirring ◽  
Modifying Additives ◽  
Elevated Frequency

Abstract The paper presents modification of primary structure of Al 99,5% and 99,8% purity and AlSi2 alloy by electromagnetic stirring of liquid metal within foundry mould. The movement of solidifying liquid metal within the mould was forced by horizontal electromagnetic field produced by the induction coil (stirrer), supplied by current of elevated frequency. The structure refinement obtained by electromagnetic stirring was compared with refinement obtained by traditional modification, i.e. by introducing Ti, B, C and Sr modifying additives into melt. The results of studies show possibility of effective primary structure refinement of pure Al and selected Al-Si alloy by using only horizontal electromagnetic field, without necessity of Ti, B and C additives application.

scholarly journals Primary Structure and Mechanical Properties of AlSi2 Alloy Continuous Ingots

2017 ◽  
Vol 17 (2) ◽  
pp. 145-150
Author(s):  
T. Wróbel ◽  
J. Szajnar ◽  
D. Bartocha ◽  
M. Stawarz
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Yield Strength ◽  
Continuous Casting ◽  
Primary Structure ◽  
Structure Refinement ◽  
Negative Influence ◽  
Electromagnetic Stirring ◽  
Metal Bath ◽  
Continuous Casting Mould

AbstractThe paper presents the research results of horizontal continuous casting of ingots of aluminium alloy containing 2% wt. silicon (AlSi2). Together with the casting velocity (velocity of ingot movement) we considered the influence of electromagnetic stirring in the area of the continuous casting mould on refinement of the ingot’s primary structure and their selected mechanical properties, i.e. tensile strength, yield strength, hardness and elongation. The effect of primary structure refinement and mechanical properties obtained by electromagnetic stirring was compared with refinement obtained by using traditional inoculation, which consists in introducing additives, i.e. Ti, B and Sr, to the metal bath. On the basis of the obtained results we confirmed that inoculation done by electromagnetic stirring in the range of the continuous casting mould guarantees improved mechanical properties and also decreases the negative influence of casting velocity, thus increasing the structure of AlSi2 continuous ingots.

scholarly journals The Stand of Horizontal Continuous Casting of Al and its Alloys

2013 ◽  
Vol 13 (3) ◽  
pp. 113-118 ◽  
Author(s):  
T. Wróbel ◽  
J. Szajnar ◽  
D. Bartocha ◽  
M. Stawarz
Keyword(s):  
Continuous Casting ◽  
Induction Furnace ◽  
Structure Refinement ◽  
Pure Aluminum ◽  
Electromagnetic Stirring ◽  
Metal Bath ◽  
Horizontal Continuous Casting ◽  
Continuous Ingot ◽  
Continuous Casting Mould

Abstract In paper is presented idea of construction and influence of selected parts of stand of horizontal continuous casting on quality of pure Al and AlSi2 alloy ingots. The main parts of the made stand belong to induction furnace, which is also tundish, water cooled continuous casting mould, system of recooling, system of continuous ingot drawing and cutting. Mainly was considered influence of electromagnetic stirrer, which was placed in continuous casting mould on refinement of ingots structure. Effect of structure refinement obtained by influence of electromagnetic stirring was compared with refinement obtained by use of traditional inoculation, which consists in introducing of additives i.e. Ti and B to metal bath. The results of studies show possibility of effective refinement of Al and AlSi2 alloy primary structure, only with use of horizontal electromagnetic field and without necessity of application of inoculants. This method of inoculation is important, because inoculants decrease the degree of purity and electrical conductivity of pure aluminum and moreover are reason of point cracks formation during rolling of ingots.

scholarly journals Structure and Usable Properties of Aluminum Continuous Ingots

2015 ◽  
Vol 15 (3) ◽  
pp. 85-90
Author(s):  
T. Wróbel ◽  
J. Szajnar ◽  
D. Bartocha ◽  
M. Stawarz
Keyword(s):  
Plastic Deformation ◽  
Continuous Casting ◽  
Structure Refinement ◽  
Electromagnetic Stirring ◽  
Metal Bath ◽  
Deformation Effect ◽  
Horizontal Continuous Casting ◽  
Continuous Casting Mould ◽  
Effect Of Structure

Abstract In paper is presented results of studies concerning ingot of Al with a purity of 99.5% cast with use of stand of horizontal continuous casting. Mainly together with casting velocity was considered influence of electromagnetic stirrer, which was placed in continuous casting mould on refinement of ingots structure and theirs usability to plastic deformation. Effect of structure refinement and usability to plastic deformation obtained by influence of electromagnetic stirring was compared with refinement obtained by use of traditional inoculation, which consists in introducing of additives i.e. Ti and B to metal bath. On the basis of obtained results was affirmed that inoculation realized by electromagnetic stirring in range of continuous casting mould guarantees improvement in structure refinement and usability to rolling of pure Al continuous ingots.

CERROBASE Alloy

Alloy Digest ◽  
1979 ◽  
Vol 28 (4) ◽  
Keyword(s):  
Liquid Metal ◽  
Eutectic Alloy ◽  
Slow Growth ◽  
Heat Treating ◽  
Metal Bath ◽  
Drop Hammer ◽  
Industrial Material ◽  
Liquid Metal Bath ◽  
Metal Products ◽  
Bismuth Lead

Abstract CERROBASE Alloy is a bismuth-lead eutectic alloy that melts at 255 F (124 C). It is characterized by initial shrinkage followed by slow growth. Its low melting temperature and/or growth-shrinkage characteristics make it a useful industrial material. Among many applications, it is used for (1) anchoring inserts in wood, metal or plastics, (2) drop-hammer dies, (3) duplicate patterns in pottery and foundry, and (4) liquid metal bath for heat treating. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on casting, forming, heat treating, and machining. Filing Code: Bi-11. Producer or source: Cerro Metal Products.

Noncoalescent liquid metal droplets sustained on a magnetic field-circulated liquid metal bath surface

2019 ◽  
Vol 115 (8) ◽  
pp. 083702 ◽  
Author(s):  
Xi Zhao ◽  
Lixiang Yang ◽  
Yujie Ding ◽  
Pengju Zhang ◽  
Jing Liu
Keyword(s):  
Magnetic Field ◽  
Liquid Metal ◽  
Bath Surface ◽  
Metal Bath ◽  
Liquid Metal Bath ◽  
Metal Droplets

scholarly journals A Study of the Impact of Power Supply Parameters on Metal Flow Velocity in the Channel of a Device for Washing out Precious Metals from of the Automotive Catalytic Converters

2014 ◽  
Vol 59 (2) ◽  
pp. 779-783
Author(s):  
A. Fornalczyk ◽  
S. Golak ◽  
R. Przyłucki ◽  
J. Willner
Keyword(s):  
Electromagnetic Field ◽  
Liquid Metal ◽  
Power Supply ◽  
Metal Flow ◽  
Precious Metals ◽  
Coupled Analysis ◽  
Steel Scrap ◽  
Catalytic Converters ◽  
Effective Velocity ◽  
The Impact

Abstract The lifetime of a catalytic converters is limited. Today’s environmental regulations require that used converters should be properly recycled as a valuable source of precious metals, Al2O3 and steel scrap. The precious metals used in the devices perform catalytic functions. They are suspended in a ceramic or metal carrier. This paper deals with the recovery of precious metals from automotive converters using a metal-collector method. In order to speed up the washout of the precious metals from the capillary structure of the converter, the movement of the liquid metal-collector was forced by the electromagnetic field. The research was aimed at improving the effective velocity of the liquid metal flow through the carrier by means of a device with a double windings. Various ways of power supply were considered. The calculation experiment was performed as a weakly coupled analysis of the electromagnetic field and flow field.

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