WO2008075995A1 - Procédé pour obtenir des additifs de fusion utilisés pour fabriquer des alliages - Google Patents

Procédé pour obtenir des additifs de fusion utilisés pour fabriquer des alliages Download PDF

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Publication number
WO2008075995A1
WO2008075995A1 PCT/RU2006/000680 RU2006000680W WO2008075995A1 WO 2008075995 A1 WO2008075995 A1 WO 2008075995A1 RU 2006000680 W RU2006000680 W RU 2006000680W WO 2008075995 A1 WO2008075995 A1 WO 2008075995A1
Authority
WO
WIPO (PCT)
Prior art keywords
additives
melt
alloys
coefficient
atoms
Prior art date
Application number
PCT/RU2006/000680
Other languages
English (en)
Russian (ru)
Inventor
Oleg Vladimirovich Anisimov
Nikolai Nikolaevich Skaldin
Sergei Semenovich Tkachev
Original Assignee
Advanced Alloys Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Advanced Alloys Sa filed Critical Advanced Alloys Sa
Priority to EP06849648A priority Critical patent/EP2108709A1/fr
Priority to CNA2006800566982A priority patent/CN101583732A/zh
Priority to PCT/RU2006/000680 priority patent/WO2008075995A1/fr
Publication of WO2008075995A1 publication Critical patent/WO2008075995A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/03—Making non-ferrous alloys by melting using master alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C35/00—Master alloys for iron or steel

Definitions

  • the invention relates to metallurgical production, and more specifically, to methods for producing a variety of alloy additives, 5 changing their service properties, including methods for producing alloys.
  • the first option for the use of additives is to modify (first and second kind) the main melt in order to substantially refine the structure.
  • modifier additives ligatures
  • various cooking methods should provide the following:
  • ⁇ 20 - using refractory substances ensure their uniform distribution over the volume of the ligature, which leads to a good grinding of its structure.
  • ligatures of the second type which are usually a mechanical mixture of the base metal and highly dispersed refractory oxide, carbide, non-nitride particles, which are the centers of formation of its grains, performs the necessary modification task only after creating large overheats (more than 50 -7O 0 C), leading to the breakdown of grain. Only under these conditions is it possible to modify the alloying element as efficiently as possible.
  • Such ligatures should have a uniform distribution of the alloying element in volume.
  • the second application of additives consists, in general, in bringing with their help the chemical composition of any alloys to the desired.
  • the additives should have the second component maximally dissolved in the main matrix, including cases of oversaturated solutions.
  • the additive as a whole contains, for example, 20% nickel in an aluminum base, while in the nickel grain itself there can be no more than 5%.
  • the initial task arises of ensuring the introduction of the second (s) component (s) into the initial working melt by attempting to completely dissolve the eutectics and equalize due to diffusion processes concentrations of this second component between the grain of the additive and the working melt.
  • the natural result of the use of such additives due to the unsolvability of the solubility problems, is the production of any alloys of a given chemical composition that have only part of the possible service properties.
  • a known method of manufacturing ligatures by exposure to their melt by an electromagnetic field (RU N ° 2210611, C22C1 / 03, publ.
  • the present invention is directed to solving the technical problem of changes in the crystallization conditions of additives due to the use of a new physical phenomenon in the forcing of diffusion processes in melts at the stage of formation of a crystalline structure in external force fields.
  • the technical result achieved in this case is to obtain additives that are more resistant to overheating, providing the perfect solubility of its matrix with working ingredients in the melt of the main alloy, which leads to a sharp (up to 2 ⁇ -30%) increase in its service properties.
  • the basis of the present invention is the creation of a method for producing additives, including alloys, for the production of various alloys, which consists in the melting of the base metal and working ingredients, mixing, filtration and crystallization by volume cooling at various speeds for grinding particles of intermetallic compounds, and, according to the invention, to increase the stability of additives during the preparation of alloys and improve their quality through the use of additives such as solid substitution solution - introduction
  • the melt of the additive crystallizes in the force field of centrifuges with a gravity coefficient in the range from 20 to 240, the crystallization process and subsequent processing of the ingot are carried out during
  • time interval equal to ratio , where a is the technological coefficient, is determined as a numerical value separately for each pair of metals, based on the thermodynamic characteristics of the mold and the rate of heat processes in last;
  • the proposed method is based on the use of a fundamentally new physical phenomenon of forcing diffusion processes in melts at the stage of formation of a crystalline structure in external force fields.
  • substitution-introduction solid solutions without eutectic emissions requires additional energy costs, which will lead to a distortion of the initial potential reliefs and, as a result, to the creation of conditions for accelerating the process of diffusion of working ingredients into the base metal.
  • An external force field such as the gravitational lift of centrifuges, is easily controllable and indifferent to the type of material, which ensures the production of any kind of additives, including the use of non-metallic materials.
  • the degree of distortion of the potential reliefs is identical to the creation of corresponding supercooling in the melts, which, according to the Tamman dependences • at their specific values can lead to the formation of any size crystal structure grains of additions 1.
  • Additives of the proposed type are more resistant to overheating, provide the ideal solubility of its matrix with the working ingredients - mm in the melt of the main alloy, which leads to a sharp (up to 25-30%) increase in its service properties.
  • FIG. 1 is a diagram of a potential relief in the vicinity of any melt atom without exposure to an external force field
  • FIG. 2 is a diagram of diffusion
  • FIG. 3 is a diagram of a potential relief in the vicinity of any melt atom in the presence of an external force field.
  • the method according to the invention for producing additives, including alloys, for the production of various alloys is carried out in rotating molds of arbitrary design.
  • the shape of the molds is also arbitrary: for castings up to and including wire.
  • the mold must provide the required melt life (several minutes) with its permissible technological overheating and withstand gravity coefficients of no more than 240.
  • the inventive method is based on the use of a fundamentally new physical phenomenon for the formation of diffusion processes in melts at the stage of crystalline casting formation in an external force field.
  • n s is the number of impurity atoms A in the considered zone
  • ⁇ P is the probability of an atom hopping in the required direction
  • f is the atomic vibration frequency near the equilibrium position
  • ⁇ A is the average activation energy of the jump of atom B to the node of the crystal lattice of the same element from the melt;
  • ⁇ ⁇ i is the additional activation energy required for 15 similar jumps of atom A (it is caused by the difference between atoms A and B).
  • atom A are respectively equal to:
  • V is the average speed of motion of type A atoms
  • S is the area of the solid phase
  • Ci is the concentration of atoms of impurity A.
  • the probability of the atom moving in the X direction is:
  • ⁇ o is the probability of hopping in an arbitrary direction (usually it is taken equal to 1/6), equal to:
  • the velocity V of the movement of the impurity atoms A is equal to:
  • the probability of constructing an additive of the type of solid solution of substitution is equal to 1.
  • equation (15) takes the form:
  • the total flux of diffusion atoms is equal to:
  • V 1 V 2 :
  • n D depends on the total activation energy (CA. + ⁇ A ⁇ ) ? which can be taken equal to the activation energy of solidification or melting.
  • Kg is the centrifuge's gravity coefficient. Expression (20) is given for the case of receiving additives in centrifuges.
  • t n 3 / n D (21) where n D is the given number of diffusing impurity atoms.
  • the melt lifetime at the selected gravity coefficient, calculated by the formula (24), is usually several minutes. So, for example, the required lifetime of the Al + 20% Ni melt is about 4 5 minutes. Reducing this time leads to incomplete dissolution of nickel in aluminum. An increase in t leads to unjustified energy costs without significantly improving the quality of the additive.
  • the present invention can be used for the manufacture of any additives of both metallic and non-metallic groups of materials, including salts and any crystallizable and polymerizable materials.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne la métallurgie et notamment un procédé de fabrication d'additifs destinés à la fabrication d'alliages, qui consiste à faire fondre un métal principal et des ingrédients de travail (des additifs) puis à effectuer une cristallisation lors du refroidissement volumique du bain de fusion avec des vitesses différentes pour assurer le concassage des particules intermétalliques. Pour assurer une meilleure stabilité des additifs pendant la préparation des alliages et pour améliorer leur qualité grâce à l'utilisation d'additifs de type 'solution solide de substitution - insertion', on cristallise le bain de fusion dans un champ deforce des centrifugeuses avec un coefficient de gravité entre 20 et 240. Le processus de cristallisation et le traitement subséquent du lingot s'effectuent pendant un intervalle t =m3 /akg, dans lequel a est le coefficient, kg est le facteur de gravité, et m3 est la masse relative d'ingrédients dissous dans l'additif.
PCT/RU2006/000680 2006-12-19 2006-12-19 Procédé pour obtenir des additifs de fusion utilisés pour fabriquer des alliages WO2008075995A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP06849648A EP2108709A1 (fr) 2006-12-19 2006-12-19 Procédé pour obtenir des additifs de fusion utilisés pour fabriquer des alliages
CNA2006800566982A CN101583732A (zh) 2006-12-19 2006-12-19 获得用于生产合金的合金添加剂的方法
PCT/RU2006/000680 WO2008075995A1 (fr) 2006-12-19 2006-12-19 Procédé pour obtenir des additifs de fusion utilisés pour fabriquer des alliages

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/RU2006/000680 WO2008075995A1 (fr) 2006-12-19 2006-12-19 Procédé pour obtenir des additifs de fusion utilisés pour fabriquer des alliages

Publications (1)

Publication Number Publication Date
WO2008075995A1 true WO2008075995A1 (fr) 2008-06-26

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PCT/RU2006/000680 WO2008075995A1 (fr) 2006-12-19 2006-12-19 Procédé pour obtenir des additifs de fusion utilisés pour fabriquer des alliages

Country Status (3)

Country Link
EP (1) EP2108709A1 (fr)
CN (1) CN101583732A (fr)
WO (1) WO2008075995A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2312003A1 (fr) * 2008-07-17 2011-04-20 Advanced Alloys SA Procédé de production d additifs et de pré-allianges destinés à la fabrication d alliages

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3592636A (en) * 1967-10-31 1971-07-13 Groove & Welter Manufacture of alloys
GB1244082A (en) * 1968-03-13 1971-08-25 Kawecki Berylco Ind Improvements in introducing a grain refining or alloying agent into molten metals and alloys
SU865948A1 (ru) * 1980-01-25 1981-09-23 Предприятие П/Я Р-6209 Модификатор дл заэвтектических силуминов
SU1650746A1 (ru) 1988-10-18 1991-05-23 Омский политехнический институт Способ получени лигатур дл алюминиевых сплавов
WO1994002270A1 (fr) * 1992-07-28 1994-02-03 Anatoly Vladimirovich Popov Procede de fabrication de pieces coulees par cristallisation orientee du bain de fusion
RU2210611C2 (ru) 2001-08-31 2003-08-20 Региональный общественный фонд содействия защите интеллектуальной собственности Способ модифицирования алюминиевых сплавов

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3592636A (en) * 1967-10-31 1971-07-13 Groove & Welter Manufacture of alloys
GB1244082A (en) * 1968-03-13 1971-08-25 Kawecki Berylco Ind Improvements in introducing a grain refining or alloying agent into molten metals and alloys
SU865948A1 (ru) * 1980-01-25 1981-09-23 Предприятие П/Я Р-6209 Модификатор дл заэвтектических силуминов
SU1650746A1 (ru) 1988-10-18 1991-05-23 Омский политехнический институт Способ получени лигатур дл алюминиевых сплавов
WO1994002270A1 (fr) * 1992-07-28 1994-02-03 Anatoly Vladimirovich Popov Procede de fabrication de pieces coulees par cristallisation orientee du bain de fusion
RU2210611C2 (ru) 2001-08-31 2003-08-20 Региональный общественный фонд содействия защите интеллектуальной собственности Способ модифицирования алюминиевых сплавов

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2312003A1 (fr) * 2008-07-17 2011-04-20 Advanced Alloys SA Procédé de production d additifs et de pré-allianges destinés à la fabrication d alliages
EP2312003A4 (fr) * 2008-07-17 2012-06-20 Advanced Alloys Sa Procédé de production d additifs et de pré-allianges destinés à la fabrication d alliages

Also Published As

Publication number Publication date
EP2108709A1 (fr) 2009-10-14
CN101583732A (zh) 2009-11-18

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