CN102031399B - Method for preparing Cu-Fe alloy under action of magnetic field - Google Patents

Method for preparing Cu-Fe alloy under action of magnetic field Download PDF

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CN102031399B
CN102031399B CN2010105390636A CN201010539063A CN102031399B CN 102031399 B CN102031399 B CN 102031399B CN 2010105390636 A CN2010105390636 A CN 2010105390636A CN 201010539063 A CN201010539063 A CN 201010539063A CN 102031399 B CN102031399 B CN 102031399B
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alloy
magnetic
under
room temperature
incubated
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CN2010105390636A
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CN102031399A (en
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王恩刚
左小伟
屈磊
张�林
赫冀成
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东北大学
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Abstract

The invention relates to a method for preparing alloy, in particular to a method for preparing Cu-Fe alloy under action of a magnetic field. The method comprises the following steps: (1) preparing cast state Cu-Fe mother alloy; (2) solidifying the Cu-Fe alloy under the action of 0.1 to 20T static magnetic field; (3) homogenizing the alloy under the action of the static magnetic field; (4) hot forging at the temperature of between 650 and 750 DEG C; (5) drawing; (6) annealing the alloy under the static magnetic field; (7) re-drawing; (8) repeating thermomechanical magnetic treatment; and (9) annealing the alloy under the action of a gradient magnetic field. By using the method, the strong magnetic energy and strong alignment of the static magnetic field are sufficiently utilized, the strong magnetic force and other characteristics of the gradient magnetic field are combined, the matching relationship between the conductivity and tensile strength of the Cu-Fe alloy is effectively optimized, and a Cu-Fe alloy wire with conductivity of 56-78 % IACS and the tensile strength of 750-1,450MPa can be obtained.

Description

The preparation method of Cu-Fe alloy under a kind of the action of a magnetic field
Technical field
The present invention relates to a kind of preparation method of alloy, the preparation method of Cu-Fe alloy under particularly a kind of the action of a magnetic field.
Background technology
High-strength high-conductivity Cu-Fe alloy as osculatory, circuit lead frame material, high impulse magnet coil lead, contact material etc., is a kind of important structure function material mainly.But this type of Cu-Fe alloy is in the alloying and the course of processing, and the increase electroconductibility with intensity can significantly descend usually, and therefore, preparation intensity and the good Cu-Fe alloy of electric conductivity coupling are the difficult points of research always.
In recent years, along with the develop rapidly of magnetic field technique, the hard magnetization in magnetic field has been widely used in solidifying of material and the thermal treatment process with strong lorentz's force characteristic, produces microgravity environment, and the orientations of control alloy structure is to optimize the microstructure and property of material.Apply dissimilar magnetic field during metal freezing, can realize the effect of metal melt Different control.Apply the flow behavior that alternating magnetic field can promote liquid metal, help the uniform distribution of melt; Melt convection when applying steady magnetic field and can stablize liquid metal solidification, solute distribution and forward position, freezing interface stability more help the crystalline orientations.Chinese invention patent application, the patent No. are among the CN 201010114104.7, provide a kind of and have applied AC magnetic field in solidification stages; Refinement Fe dendrite; Reduce the Fe segregation, realize the control that the Cu-Fe deformation in-situ composite material solidifies, but AC magnetic field is unfavorable for the crystalline orientations.Simultaneously, steady magnetic field also can be applied to the multiple heat treatment stages of alloy material, to realize the regulation and control purpose of different heat treatment.Aforementioned patent of invention provides in the solid solution aging of material is handled and has utilized steady magnetic field; Control the dissolving of solid solution atom and separate out behavior; The strength of alloy of preparation is 710 ~ 950MPa, and electric conductivity is 54 ~ 60%IACS (IACS: I.A.C.S.).But do not relate to steady magnetic field and gradient magnetic report in the existing document in thermal treatment process such as the homogenizing of Cu-Fe alloy, annealing.
Summary of the invention
The objective of the invention is to propose a kind of preparation method of Cu-Fe alloy, to obtain the Cu-Fe alloy of high-strength high-conductivity to prior art problems.
The technical scheme that realizes the object of the invention is: the preparation method of Cu-Fe alloy under a kind of the action of a magnetic field is provided, carries out as follows:
(1) preparation as cast condition Cu-Fe mother alloy: with electrolytic copper and technically pure iron is raw material, adopts vacuum induction melting or vacuum arc melting to prepare as cast condition Cu-Fe mother alloy;
(2) the solidifying of Cu-Fe alloy under the steady magnetic field effect: above-mentioned as cast condition Cu-Fe mother alloy is placed 0.1 ~ 20 T steady magnetic field; Be heated to 1300 ~ 1500 ℃; Be incubated 20 ~ 60 minutes, the speed with 5 ~ 100 ℃/min is cooled to room temperature then, obtains the Cu-Fe alloy;
(3) homogenizing of alloy is handled under the steady magnetic field effect: the Cu-Fe alloy of step (2) preparation is carried out 750~1000 ℃, be incubated 0.5~24 hour, the steady magnetic field homogenizing of 0.1 ~ 20 T is handled;
(4) forge hot: the Cu-Fe alloy after step (3) handled, carry out total draft and be 0.3~0.8 forge hot under 650~750 ℃;
(5) drawing: it is 0.3~0.7 room temperature drawing that the Cu-Fe alloy after step (4) forge hot is carried out total draft, obtains the Cu-Fe alloy wire;
(6) anneal of alloy under the steady magnetic field: with the Cu-Fe alloy wire that obtains after step (5) drawing, place the steady magnetic field of 0.1~20 T to carry out 400~550 ℃, be incubated 0.5~24 hour, slowly the anneal of cool to room temperature;
(7) drawing again:, at room temperature carry out total draft and be 0.2~0.5 room temperature drawing again with the Cu-Fe alloy wire after step (6) thermal treatment;
(8) repeat the deformation thermomagnetic treatment: the deformation thermomagnetic treatment of repeating step (6) and (7) 0 ~ 3 time obtains the Cu-Fe alloy wire of 0.1mm~5.0 mm;
(9) anneal of alloy under the gradient magnetic effect: the Cu-Fe alloy wire that step (8) is obtained; At magnetic induction density is 0.1 ~ 20 T; The magnetic induction density gradient is to carry out 300 ~ 450 ℃ under the gradient magnetic of-200 T/m ~ 200 T/m; Be incubated 1 ~ 48 hour, slowly the anneal of cool to room temperature obtains the finished product.
The present invention relates to the consisting of of as cast condition Cu-Fe mother alloy in the step (1): Fe content is 8% ~ 25% by weight percentage, and surplus is Cu.
The Cu-Fe alloy conductive rate of utilizing the present invention to prepare is that 56 ~ 78 %IACS, tensile strength are 750 ~ 1450 MPa.
The invention has the beneficial effects as follows:
(1) through in the Cu-Fe solidification of Al, applying steady magnetic field, can control melt convection, solute distribution and forward position, freezing interface stability, reach the effect of the orientations of refinement Fe dendrite, promotion Fe dendrite;
(2) handle through before the forge hot of Cu-Fe alloy, applying the steady magnetic field homogenizing; Can quicken nonequilibrium freezing and be organized in the matrix to distribute and be tending towards evenly, the super saturated solid solution element is separated out from sosoloid, reaches the elimination casting stress; Improve plasticity, reduce the purpose of resistance to deformation;
(3) apply the steady magnetic field anneal in the process through preparing, can reduce the solid solubility of Fe in Cu under the high temperature, effectively promote Fe separating out from Cu under the low temperature, reduce impurity scattering, reach the purpose that increases the composite material conductive rate at deformation Cu-Fe alloy;
(4) carry out anneal through in the finished product, applying gradient magnetic, can be so that the intensity of matrix material and electric conductivity improve 1 ~ 10%;
(5) through implementing above summary of the invention, the electric conductivity of the identical Fe content Cu-Fe alloy of the Cu-Fe alloy ratio prior art for preparing of preparation and intensity improve 5 ~ 15%.
Embodiment
Embodiment 1:
(1) preparation as cast condition Cu-Fe mother alloy: electrolytic copper and technically pure iron by weight the 92:8 proportioning, are heated melting in vacuum arc fumace, cast in the water cooled copper mould, prepare as cast condition Cu-Fe mother alloy;
(2) the solidifying of Cu-Fe alloy under the steady magnetic field effect: above-mentioned as cast condition Cu-Fe mother alloy is placed 10 T steady magnetic field central positions, be heated to 1300 ℃, be incubated 20 minutes, the speed with 100 ℃/min is cooled to room temperature then;
(3) homogenizing of alloy is handled under the steady magnetic field effect: the Cu-Fe alloy of step (2) preparation is placed 20 T steady magnetic field centers, be heated to 750 ℃, be incubated 12 hours, with the slow cool to room temperature of stove;
(4) forge hot: the Cu-Fe alloy after step (3) processing is heated to 650 ℃ carries out forge hot, the total draft of forge hot is 0.8;
(5) drawing: the Cu-Fe alloy after step (4) forge hot is at room temperature carried out drawing, and total draft is 0.7;
(6) anneal of alloy under the steady magnetic field: with the Cu-Fe alloy wire that obtains after step (5) drawing, under 20 T steady magnetic fields, be heated to 400 ℃, be incubated 0.5 hour, slowly cool to room temperature;
(7) drawing again: the Cu-Fe alloy wire with after step (6) thermal treatment, at room temperature carry out drawing once more, total draft is 0.5;
(8) repeat the deformation thermomagnetic treatment: the deformation thermomagnetic treatment of repeating step (6) (7) 3 times obtains the Cu-Fe alloy wire of diameter 0.1 mm;
(9) anneal of alloy under the gradient magnetic effect: with the Cu-Fe alloy wire of step (8) acquisition; At 20 T magnetic induction density; The magnetic induction density gradient is under the gradient magnetic of-200 T/m; 1 h is handled in 300 ℃ of vacuum annealings, and the electric conductivity that obtains the Cu-Fe alloy wire is 78 %IACS, and tensile strength is 750MPa.
Embodiment 2:
(1) preparation as cast condition Cu-Fe mother alloy: electrolytic copper and technically pure iron by weight the 85:15 proportioning, are heated melting in vacuum induction furnace, cast in the water cooled copper mould formation as cast condition Cu-Fe mother alloy;
(2) the solidifying of Cu-Fe alloy under the steady magnetic field effect: above-mentioned as cast condition Cu-Fe mother alloy is placed 0.1 T steady magnetic field central position, be heated to 1400 ℃, be incubated 40 minutes, the speed with 50 ℃/min is cooled to room temperature then;
(3) homogenizing of alloy is handled under the steady magnetic field effect: the Cu-Fe alloy of step (2) preparation is placed 0.1 T steady magnetic field center, be heated to 900 ℃, be incubated 24 hours, with the slow cool to room temperature of stove;
(4) forge hot: the Cu-Fe alloy after step (3) processing is heated to 700 ℃ carries out forge hot, the total draft of forge hot is 0.5;
(5) drawing: the Cu-Fe alloy after step (4) forge hot is at room temperature carried out drawing, and total draft is 0.5;
(6) anneal of alloy under the steady magnetic field: with the Cu-Fe alloy wire that obtains after step (5) drawing, under 0.1 T steady magnetic field, be heated to 450 ℃, be incubated 24 hours, slowly cool to room temperature;
(7) drawing again: the Cu-Fe alloy wire with after step (6) thermal treatment, at room temperature carry out drawing once more, total draft is 0.4;
(8) repeat the deformation thermomagnetic treatment: repeat the deformation thermomagnetic treatment 0 time of step (6) (7), obtain the Cu-Fe alloy wire of diameter 5 mm;
(9) anneal of alloy under the gradient magnetic effect: with the Cu-Fe alloy wire of step (8) acquisition; At magnetic induction density is 5 T; The magnetic induction density gradient is under the gradient magnetic of 200 T/m; 10 h are handled in 350 ℃ of vacuum annealings, and the electric conductivity that obtains the Cu-Fe alloy wire is 60 %IACS, and tensile strength is 1100 MPa.
Embodiment 3:
(1) preparation of as cast condition Cu-Fe mother alloy: electrolytic copper and technically pure iron by weight the 85:25 proportioning, are heated melting in vacuum induction furnace, cast in the water cooled copper mould, form as cast condition Cu-Fe mother alloy;
(2) the solidifying of Cu-Fe alloy under the steady magnetic field effect: above-mentioned as cast condition Cu-Fe mother alloy is placed 20 T steady magnetic field central positions, be heated to 1500 ℃, be incubated 60 minutes, the speed with 5 ℃/min is cooled to room temperature then;
(3) homogenizing of alloy is handled under the steady magnetic field effect: the Cu-Fe alloy of step (2) preparation is placed 12 T steady magnetic field centers, be heated to 1000 ℃, be incubated 0.5 hour, with the slow cool to room temperature of stove;
(4) forge hot: the Cu-Fe alloy after step (3) processing is heated to 750 ℃ carries out forge hot, the total draft of forge hot is 0.3;
(5) drawing: the Cu-Fe alloy after step (4) forge hot is at room temperature carried out drawing, and total draft is 0.3;
(6) anneal of alloy under the steady magnetic field: with the Cu-Fe alloy wire that obtains after step (5) drawing, under 6 T steady magnetic fields, be heated to 550 ℃, be incubated 5 hours, slowly cool to room temperature;
(7) drawing again: the Cu-Fe alloy wire with after step (6) thermal treatment, at room temperature carry out drawing once more, total draft is 0.3;
(8) repeat the deformation thermomagnetic treatment: repeat the deformation thermomagnetic treatment 2 times of step (6) (7), obtain the Cu-Fe alloy wire of diameter 1.4 mm;
(9) anneal of alloy under the gradient magnetic effect: with the Cu-Fe alloy wire of step (8) acquisition; At magnetic induction density is 0.1 T; The magneticinduction gradient is under the 10 T/m high-intensity magnetic fields; 24 h are handled in 450 ℃ of vacuum annealings, and the electric conductivity that obtains the Cu-Fe alloy wire is 56 %IACS, and tensile strength is 1450 MPa.

Claims (3)

1. the preparation method of Cu-Fe alloy under the action of a magnetic field is characterized in that step is following:
(1) preparation as cast condition Cu-Fe mother alloy: with electrolytic copper and technically pure iron is raw material, adopts vacuum induction melting or vacuum arc melting to prepare as cast condition Cu-Fe mother alloy;
(2) the solidifying of Cu-Fe alloy under the steady magnetic field effect: above-mentioned as cast condition Cu-Fe mother alloy is placed 0.1~20 T steady magnetic field; Be heated to 1300~1500 ℃; Be incubated 20~60 minutes, the speed with 5~100 ℃/min is cooled to room temperature then, obtains the Cu-Fe alloy;
(3) homogenizing of alloy is handled under the steady magnetic field effect: the Cu-Fe alloy of step (2) preparation is carried out 750~1000 ℃, be incubated 0.5~24 hour, the steady magnetic field homogenizing of 0.1~20 T is handled;
(4) forge hot: the Cu-Fe alloy after step (3) handled, carry out total draft and be 0.3~0.8 forge hot under 650~750 ℃;
(5) drawing: it is 0.3~0.7 room temperature drawing that the Cu-Fe alloy after step (4) forge hot is carried out total draft, obtains the Cu-Fe alloy wire;
(6) anneal of alloy under the steady magnetic field: with the Cu-Fe alloy wire that obtains after step (5) drawing, place the steady magnetic field of 0.1~20 T to carry out 400~550 ℃, be incubated 0.5~24 hour, slowly the anneal of cool to room temperature;
(7) drawing again:, at room temperature carry out total draft and be 0.2~0.5 room temperature drawing again with the Cu-Fe alloy wire after step (6) thermal treatment;
(8) repeat the deformation thermomagnetic treatment: the deformation thermomagnetic treatment of repeating step (6) and (7) 0~3 time, obtaining diameter is the Cu-Fe alloy wire of 0.1mm~5.0 mm;
(9) anneal of alloy under the gradient magnetic effect: the Cu-Fe alloy wire that step (8) is obtained; At magnetic induction density is 0.1~20 T; The magnetic induction density gradient is to carry out 300~450 ℃ under the gradient magnetic of-200 T/m~200 T/m; Be incubated 1~48 hour, slowly the anneal of cool to room temperature obtains the finished product.
2. the preparation method of Cu-Fe alloy is characterized in that under a kind of the action of a magnetic field according to claim 1, the consisting of of the as cast condition Cu-Fe mother alloy in the said step (1): Fe content is 8%~25% by weight percentage, and surplus is Cu.
3. the preparation method of Cu-Fe alloy is characterized in that under a kind of the action of a magnetic field according to claim 1, and the electric conductivity of the Cu-Fe alloy of the finished product is that 56~78 %IACS, tensile strength are 750~1450 MPa.
CN2010105390636A 2010-11-11 2010-11-11 Method for preparing Cu-Fe alloy under action of magnetic field CN102031399B (en)

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CN101775520B (en) * 2010-02-25 2011-04-13 江西省科学院应用物理研究所 Method for preparing high-performance Cu-Fe deformation in-situ composite material by magnetic field treatment

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