CN114645240B - Preparation method of metal nickel-aluminum composite strip for electronic industry - Google Patents
Preparation method of metal nickel-aluminum composite strip for electronic industry Download PDFInfo
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- CN114645240B CN114645240B CN202210289334.XA CN202210289334A CN114645240B CN 114645240 B CN114645240 B CN 114645240B CN 202210289334 A CN202210289334 A CN 202210289334A CN 114645240 B CN114645240 B CN 114645240B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/123—Spraying molten metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
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- C21D1/26—Methods of annealing
- C21D1/30—Stress-relieving
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
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Abstract
The invention belongs to the technical field of preparation of pure metal nickel-aluminum composite strips for the electronic industry. Discloses a preparation method of a metal nickel-aluminum composite strip for the electronic industry. The invention fully combines the technical advantages of the spray deposition process and the short-process preparation, including pure metal nickel vacuum induction smelting, metal nickel protective atmosphere spray deposition, metal aluminum vacuum induction smelting, metal aluminum spray deposition on the nickel surface layer, stress relief annealing, hot rolling and precise cold rolling forming. The process not only solves the problem of low welding strength of the metal nickel strap and the aluminum strap, but also further improves the production efficiency and reduces the cost.
Description
Technical Field
The invention belongs to the technical field of preparation of high-purity metal nickel-aluminum composite strips for the electronic industry. A process for preparing high-purity Ni-Al composite belt material by combining vacuum induction smelting with dual-nozzle scanning jet deposition mode is disclosed.
Background
The pure metal nickel strap and the aluminum strap have good conductivity and processing ductility, and the nickel strap-aluminum strap composite connecting strap prepared by welding the pure metal nickel strap and the aluminum strap is widely used in the fields of aerospace, electronics, machinery and the like. The production of the high-quality metal strip comprises important technological processes of pure smelting, hot rolling, cold rolling, annealing and the like, wherein the cold rolling process can produce the metal strip with very thin thickness (2-3 microns) and very high surface quality, but the cold rolled metal strip has large deformation resistance, high hardness and reduced shaping, and in addition, the rolling process is unreasonable, and surface defects such as iron scale pressing, longitudinal strip scratches, surface pits, subcutaneous bubbles, microcracks, scales, folding and the like can be generated on the strip. At present, the widely applied nickel and aluminum strips in the field of electronic industry all relate to a welding process, including laser welding,Electron beam welding, plasma welding, manual arc welding, and the like. Because of low heat conductivity and large electric resistivity of pure metallic nickel, problems such as hot cracks, air holes, coarse grains and the like are easy to occur during welding. The welding process is bad or the parameters are not matched, more inclusions are generated or harmful phases are separated out in a heat affected zone, microcracks at the welding seam are often caused to be initiated, the mechanical properties of a welded joint after welding are seriously reduced, and the use of a workpiece is influenced. Researches show that if a small amount of oxygen (O) exists in a welding line during the welding process of the pure metal nickel strap and other metal materials, the O and Ni can generate nickel oxide as a product, the nickel oxide can further form a eutectic phase with a low melting point with the nickel, the eutectic phase is positioned at a grain boundary part, and after cooling, micro cracks are generated in the welding line, heat and an affected area under the action of higher welding residual stress, so that the strength of a welding joint is reduced. In addition, trace elements are usually present in the nickel strip, so that the solidification range of metallic nickel is widened, various brittle precipitated phases are generated in crystal and grain boundaries, solidification cracks are easy to initiate, and the welding of nickel and other metals is difficult. The test result shows that the nickel has higher chemical affinity to the elemental sulfur (S) and the phosphorus (P), and can generate two low-melting eutectic phases NiS during crystallization 2 -Ni and Ni 3 P-Ni and is distributed in the grain boundary, so that the bonding strength of the welding line is reduced. In addition, many low-melting eutectic and nonmetallic eutectic, particularly sulfur and phosphorus eutectic with lower melting points than Ni and Fe, exist in binary eutectic of iron and nickel, so that the generation of hot cracks is increased, and the welding strength is reduced. In addition, when Ni metal and dissimilar metal are welded in an atmospheric environment, metallurgical chemical reactions such as diffusion of substances, convection, and phase precipitation occur in addition to heat exchange between the weld zone and air. Therefore, the mechanical property and the technological property of the welded joint are greatly influenced by the gas environment of the welding seam part. The gas in the metal material can cause the defects of air holes, internal oxidation and the like of the metal, and reduce the mechanical property and the physical and chemical properties. Therefore, a process method for preparing the nickel-aluminum composite strip material in a short process while improving the interface bonding strength is urgently needed.
Disclosure of Invention
Aiming at the technical problems of low welding strength, large performance fluctuation and the like of a high-quality pure nickel-aluminum composite strip used in the electronic field, the invention provides a method for preparing a high-purity metal nickel-aluminum composite strip by combining a double-nozzle scanning jet deposition mode of vacuum induction melting, improves the bonding strength of a nickel strip and an aluminum strip, is beneficial to improving the bonding quality level and performance stability of the pure nickel strip-aluminum strip, and meets the requirements of the electronic industry.
The object of the invention is achieved by:
(1) Vacuum induction smelting of pure metallic nickel (Ni): placing the pure metal nickel which is cut into blocks into a refractory crucible of a smelting chamber of jet deposition equipment, vacuumizing the equipment, and carrying out power transmission induction heating until the nickel is melted, wherein the final smelting temperature is 100-250 ℃ higher than the melting point of the metal nickel;
(2) Atomizing and depositing metallic nickel melt: after the metal nickel is melted down, the temperature of the metal nickel melt is uniform and consistent, then the melt is poured into a heated refractory material tundish at a speed of 1-3 Kg/min, the nickel melt reaches a double scanning nozzle in an atomization chamber through a tundish diversion system, high-purity Ar gas of 2-3 MPa is adopted through the double scanning atomizing nozzle, the metal nickel melt flowing out of a diversion pipe is atomized into molten drops, and the molten drops fly and are deposited on a reciprocating depositor to form a metal nickel deposition blank;
(3) Cooling a metal nickel deposition plate blank: high-purity argon is blown through a double-scanning nozzle;
(4) Vacuumizing an atomization deposition device: vacuumizing a smelting chamber and a deposition chamber of the atomization deposition equipment;
(5) Vacuum induction smelting of metallic aluminum (Al): adding pure metal aluminum blocks into a crucible of a jet deposition smelting chamber through a feeder, and carrying out power transmission induction heating until the pure metal aluminum blocks are completely melted;
(6) Atomizing and depositing metal aluminum melt: after melting down the metal aluminum, preserving heat to ensure that the temperature of the melt is uniform and consistent, pouring the melt into a heated tundish at a speed of 0.5-1 Kg/min, atomizing the metal aluminum melt flowing out of a flow guide pipe into molten drops by adopting high-purity Ar gas of 1-2 MPa through a double-scanning atomizing nozzle, flying the molten drops and depositing the molten drops on a reciprocating depositor, covering the surface of metal nickel to form a metal nickel aluminum composite deposition blank, opening a deposition chamber door after cooling to room temperature, and taking out the nickel-aluminum composite deposition blank; liquid metal aluminum is deposited on a solid metal nickel substrate with a rough surface, so that the bonding strength is improved, and brittle intermetallic compounds are avoided;
(7) Stress relief annealing: carrying out stress relief annealing on the nickel-aluminum composite deposition plate blank through a bell-type furnace under the protection of argon;
(8) Machining: machining the nickel-aluminum composite strip into a suitable plate shape to be suitable for rolling the strip by a rolling mill;
(9) Rolling the composite strip: the composite strip is hot rolled and then cold rolled.
And finally, checking the finished product. And checking the surface quality and the interface of the nickel-aluminum composite strip to determine whether defects exist.
Preferably, the purity of the pure metallic nickel in the step (1) is more than or equal to 999.6 percent, and the vacuum degree of vacuumizing is less than 10 -2 Pa。
Preferably, the baking temperature of the tundish in the step (2) is 100-200 ℃ higher than the melting point of the metallic nickel; the purity of the high-purity Ar gas is more than 99.9 percent by weight.
Preferably, after the metallic nickel in the step (2) is melted down, the temperature is kept for 10-20 min.
Preferably in step (3), the metallic nickel deposition blank is cooled to a temperature below 200 ℃.
Preferably, in the step (5), the smelting temperature is 100-200 ℃ higher than the melting point of the metallic nickel.
Preferably, the baking temperature of the tundish in the step (6) is 100-150 ℃ higher than the melting point of aluminum.
Preferably, in the step (6), after the metal aluminum is melted down, the temperature is kept for 2 to 5 minutes.
Preferably, the highest annealing temperature in the step (7) is 300+/-20 ℃, and the temperature is kept for 30+/-10 minutes.
The thickness of the strip after cold rolling in the step (9) is preferably 0.2mm to 0.3mm, and the surface roughness of the cold rolled strip is controlled to be Ra2.0mu m to Ra3.5mu m.
The vacuum degree of equipment in the smelting process is less than 10 -2 Pa is an important guarantee for preparing a high-purity nickel-aluminum composite strip product, and metallic aluminum is easy to oxidize at high temperature; after the metallic nickel is melted down, the heat is preserved for 10 to 20 minutes to ensure that the temperature field of the molten metal is more uniform, thereby being beneficial to spray deposition;cooling the metal nickel deposition blank to a temperature lower than 200 ℃, mainly avoiding high temperature from influencing the removal of the deposition blank; the baking temperature of the tundish is 100-150 ℃ higher than the melting point of aluminum so as to ensure smooth atomization deposition and avoid nozzle blockage; the maximum annealing temperature is 300+/-20 ℃, and the aim of heat preservation is to reduce the residual stress in the material and ensure the smooth proceeding of the subsequent rolling process.
The spray deposition is a process for preparing high-performance metal materials by using a rapid solidification method, integrates materials, processes and parts, has low preparation cost, can obtain internal tissues with fine grains and no segregation, and opens up a new way for preparing advanced materials. The jet deposition process principle is that under the protective atmosphere of inert gas, molten metal is broken into tiny metal droplets by adopting high-pressure gas, the atomized droplets are subjected to heat exchange in a heat transfer mode such as convection and radiation in the flying process to generate solidification with different degrees, the partially solidified droplets impact the surface of a depositor at high speed, are attached, spread (deformed or broken) and accumulated on the surface of the depositor, gradually grow into large metal deposition blanks, and the blanks are subjected to subsequent processing to obtain final products. Compared with the common preparation method of the metal material, the spray deposition process with the characteristic of short flow has incomparable advantages, and the preparation method of the metal material not only can improve the internal structure of the material, but also has fewer preparation procedures, obviously reduces the production cost and has great economic benefit. In the traditional method, although a single nozzle is adopted for vertical spray deposition, the nozzle is inclined by a certain angle and the depositor is vertically moved downwards at a certain speed for atomization, a metal material deposition blank with a regular shape can be prepared, and the diameter of the blank is closely related to the downward movement speed of the depositor, the spraying angle and the scattering angle of an atomization cone; a transition zone exists at the beginning section of the deposition blank prepared under the condition of oblique spraying downward movement, the diameter of a blank in the transition zone is firstly increased and then decreased, and finally the blank gradually becomes a steady deposition size, but a deposition blank with a larger size cannot be prepared by single-nozzle spray deposition.
The invention creatively designs a method combining metal vacuum induction smelting and double-nozzle scanning jet deposition, which has the advantages of short process flow, high preparation efficiency, low cost, good composite quality and the like. The nickel-aluminum metal composite strip prepared by adopting the double-nozzle scanning spray deposition mode has the characteristics of low cost and improved deposition efficiency and material yield.
Compared with the prior art, the invention has the beneficial characteristics that:
(1) metallic nickel and aluminum are both metallic materials with good conductivity and shape, but they produce brittle intermetallic materials (e.g., niAl, al) when welded at high temperatures 3 Ni, al3Ni2, al3Ni5, etc.), microcracks are easily initiated at the joints due to low molding of intermetallic compounds, and the strength is reduced. Therefore, the special microstructure of semi-metallurgical bonding of two metal interfaces is realized by adopting the double-nozzle scanning jet deposition mode, and the result shows that the process has about 30MPa higher tensile strength at the interface bonding position than that of a pure welding method. (2) And smelting pure metal nickel and metal aluminum in a vacuum environment, and then performing jet deposition in a high-purity argon atmosphere, so that the risk of generating inclusion and brittle intermetallic compounds at an interface is reduced, and the bonding strength of the two metals is improved.
The invention fully combines the technical advantages of the spray deposition process and the short-flow preparation, and comprises the procedures of high-purity metallic nickel vacuum induction smelting, metallic nickel protective atmosphere spray deposition, metallic aluminum vacuum induction smelting, metallic aluminum spray deposition on a nickel surface layer, composite deposition plate blank destressing annealing, hot rolling, precise cold rolling and the like. The process method not only solves the problem of low welding strength of the metal nickel strap and the aluminum strap, but also further improves the production efficiency and reduces the cost.
Drawings
FIG. 1 is a graph of the nickel-aluminum composite strip interface prepared by the process of comparative example 1.
FIG. 2 is a nickel-aluminum composite strip interface prepared by the process of example 1.
Detailed Description
The invention is further illustrated by the following examples
Example 1
Placing pure metal nickel (purity is not less than 999.6%) cut into blocks into a refractory crucible of a smelting chamber of jet deposition equipment, vacuumizing the equipment (vacuum degree is 0.02 Pa), and carrying out power transmission induction heating until the nickel is melted, wherein the final smelting temperature is higher than the melting point of the metal nickel by 100 ℃; after the metal nickel is melted down, preserving heat for 10min to ensure that the temperature of the metal nickel melt is uniform, pouring the melt into a heated refractory material tundish at a speed of 1Kg/min, and baking the tundish at a temperature higher than the melting point of the metal nickel by 100 ℃. The nickel melt reaches a double-scanning nozzle in an atomization chamber through a tundish diversion system, high-purity Ar gas (purity is more than 99.9%wt) of 2MPa is adopted through the double-scanning atomization nozzle, the metal nickel melt flowing out of the diversion pipe is atomized into molten drops, and the molten drops fly and are deposited on a reciprocating deposition device to form a metal nickel deposition blank; high-purity argon is blown through a double scanning nozzle, and the metal nickel deposition blank is cooled to the temperature of 100 ℃; vacuumizing a smelting chamber and a deposition chamber of the atomization deposition equipment; adding a pure metal aluminum block into a crucible of a jet deposition smelting chamber through a feeder, and carrying out power transmission induction heating until the pure metal aluminum block is completely melted, wherein the melting temperature is 100 ℃ higher than the melting point of metallic nickel; after melting the metal aluminum, preserving the heat for 2-5 min to ensure that the temperature of the melt is uniform, pouring the melt into a heated tundish at the speed of 0.5-1 Kg/min, and baking the tundish at the temperature which is 100-150 ℃ higher than the melting point of the aluminum. High-purity Ar gas (purity is more than 99.9%wt) with the adoption of 1-2 MPa is adopted through a double-scanning atomizing nozzle, the metal aluminum melt flowing out of the flow guide pipe is atomized into molten drops, and the molten drops fly and are deposited on a reciprocating deposition device to cover the surface of the metal nickel, so that a metal nickel aluminum composite deposition blank is formed. After cooling to room temperature, opening a deposition chamber door, and taking out a nickel-aluminum composite deposition plate blank; carrying out stress relief annealing on the nickel-aluminum composite deposition plate blank through a bell-type furnace under the protection of argon, wherein the highest annealing temperature is 300 ℃, and preserving heat for 20 minutes; machining the nickel-aluminum composite strip into a proper plate shape to be suitable for rolling the strip by a rolling mill; the composite strip is hot rolled and then cold rolled. The thickness of the strip after cold rolling was 0.2mm. Controlling the surface roughness of the cold-rolled strip to be Ra2.0mu m; the surface of the nickel-aluminum composite strip is smooth, the bonding interface is compact, no metallurgical defects such as looseness, holes and microcracks exist, the tensile strength of the composite strip is detected to be about 800MPa, wherein the bonding strength of the nickel-aluminum strip interface is about 90MPa, and compared with the traditional process, the strength of the nickel-aluminum composite strip interface is improved by about 50MPa.
Example 2
Placing pure metal nickel (purity is not less than 999.6%) which is cut into blocks into a refractory crucible of a smelting chamber of double-scanning jet deposition equipment, vacuumizing the equipment (vacuum degree is 0.05 Pa), carrying out power transmission induction heating until the nickel is melted, and finally, smelting the metal nickel at a temperature higher than the melting point of 250 ℃; after pure metal nickel is melted down, heat preservation is carried out for 20min, so that the temperature of the metal nickel melt is uniform, then the melt is poured into a heated refractory material tundish at the speed of 3Kg/min, and the baking temperature of the tundish is 200 ℃ higher than the melting point of the metal nickel. The nickel melt reaches a double-scanning nozzle in an atomization chamber through a tundish diversion system, high-purity Ar gas (purity is more than 99.9%wt) of 3MPa is adopted through the double-scanning atomization nozzle, the metal nickel melt flowing out of the diversion pipe is atomized into molten drops, and the molten drops fly and are deposited on a reciprocating deposition device to form a metal nickel deposition blank; high-purity argon is blown through a double scanning nozzle, and the metal nickel deposition blank is cooled to a temperature lower than 200 ℃; vacuumizing a smelting chamber and a deposition chamber of the atomization deposition equipment; adding a pure metal aluminum block into a crucible of a jet deposition smelting chamber through a feeder, and carrying out power transmission induction heating until the pure metal aluminum block is completely melted, wherein the melting temperature is 200 ℃ higher than the melting point of metallic nickel; after melting the metal aluminum, preserving the heat for 5min to ensure that the temperature of the melt is uniform, pouring the melt into a heated tundish at the speed of 1Kg/min, and baking the tundish at the temperature higher than the melting point of the aluminum by 150 ℃. And atomizing the metal aluminum melt flowing out of the flow guide pipe into molten drops by adopting high-purity Ar gas (purity is more than 99.9%wt) of 2MPa through a double-scanning atomizing nozzle, and enabling the molten drops to fly and deposit on a reciprocating depositor to cover the surface of the metal nickel so as to form a metal nickel aluminum composite deposition blank. After cooling to room temperature, opening a deposition chamber door, and taking out a nickel-aluminum composite deposition plate blank; carrying out stress relief annealing on the nickel-aluminum composite deposition plate blank through a bell-type furnace under the protection of argon, wherein the highest annealing temperature is 320 ℃, and preserving heat for 40 minutes; machining the nickel-aluminum composite strip into a suitable plate shape to be suitable for rolling the strip by a rolling mill; the composite strip is hot rolled and then cold rolled. The thickness of the strip after cold rolling was 0.3mm. The surface roughness of the cold rolled strip was controlled to Ra3.5μm. The quality of the nickel-aluminum composite strip is checked, the bonding interface is compact, no metallurgical defects such as looseness, holes and microcracks exist, and the tensile strength of the composite strip is checked to be about 680MPa, wherein the bonding strength of the nickel-aluminum strip interface is about 80MPa, and compared with the traditional process, the bonding strength of the nickel-aluminum composite strip interface is improved by about 40MPa.
Comparative example 1
Putting massive pure metal nickel (purity is more than or equal to 999.6%) into a refractory crucible of a vacuum induction smelting furnace, vacuumizing equipment (vacuum degree is 0.05 Pa), carrying out power transmission induction heating until the nickel is melted, casting into a flat steel ingot mould after refining, cooling, and taking out a nickel flat ingot for surface machining. And (3) carrying out hot rolling on the processed nickel slab ingot, rolling into a nickel plate with the thickness of about 20mm-50mm, and carrying out surface machining for later use. Smelting pure metal aluminum and casting an aluminum slab ingot. And rolling the aluminum slab ingot. And (3) cleaning the surface of the pure aluminum plate after rolling, drying, and machining, wherein the size and the shape are matched with those of the nickel plate. And stacking the pure metal nickel plate and the aluminum plate, putting the stacked pure metal nickel plate and the aluminum plate into a precise heating furnace for heating, taking out the stacked pure metal nickel plate and the aluminum plate after the pure metal nickel plate and the aluminum plate reach the temperature, and performing hot rolling and cold rolling. Rolled and processed into the thickness and the dimension specification required by the product. The quality of the nickel-aluminum composite strip is checked, and the bonding strength of the interface part is about 30MPa.
Claims (7)
1. The preparation method of the pure nickel-aluminum composite strip for the electronic industry is characterized by comprising the following process steps:
(1) Vacuum induction smelting of pure metallic nickel: placing the pure metal nickel which is cut into blocks into a refractory crucible of a smelting chamber of jet deposition equipment, vacuumizing the equipment, and carrying out power transmission induction heating until the nickel is melted, wherein the final smelting temperature is 100-250 ℃ higher than the melting point of the metal nickel; the purity of the pure metal nickel is more than or equal to 999.6 percent, and the vacuum degree of vacuumizing is less than 10 -2 Pa；
(2) Atomizing and depositing metallic nickel melt: after the metal nickel is melted down, preserving heat for 10-20 min to ensure that the temperature of the metal nickel melt is uniform, pouring the melt into a heated refractory material tundish at a speed of 1-3 Kg/min, enabling the nickel melt to reach a double scanning nozzle in an atomization chamber through a tundish flow guiding system, atomizing the metal nickel melt flowing out of a flow guiding pipe into molten drops by adopting 2-3 MPa high-purity Ar gas through the double scanning atomizing nozzle, and enabling the molten drops to fly and deposit on a reciprocating depositor to form a metal nickel deposition blank;
(3) Cooling a metal nickel deposition plate blank: high-purity argon is blown through a double-scanning nozzle; vacuumizing an atomization deposition device: vacuumizing a smelting chamber and a deposition chamber of the atomization deposition equipment;
(5) Vacuum induction smelting of aluminum metal: adding pure metal aluminum blocks into a crucible of a jet deposition smelting chamber through a feeder, and carrying out power transmission induction heating until the pure metal aluminum blocks are completely melted;
(6) Atomizing and depositing metal aluminum melt: after melting the metal aluminum, preserving heat for 2-5 min to ensure that the temperature of the melt is uniform, pouring the melt into a heated tundish at a speed of 0.5-1 Kg/min, atomizing the metal aluminum melt flowing out of a flow guide pipe into molten drops by adopting high-purity Ar gas of 1-2 MPa through a double-scanning atomizing nozzle, flying the molten drops and depositing the molten drops on a reciprocating deposition device, covering the surface of metal nickel to form a metal nickel aluminum composite deposition blank, cooling to room temperature, opening a deposition chamber door, and taking out a nickel-aluminum composite deposition blank;
(7) Stress relief annealing: carrying out stress relief annealing on the nickel-aluminum composite deposition plate blank through a bell-type furnace under the protection of argon;
(8) Machining: machining the nickel-aluminum composite strip into a plate shape to be suitable for rolling the strip by a rolling mill;
(9) Rolling the composite strip: the composite strip is hot rolled and then cold rolled.
2. The method for preparing a pure nickel-aluminum composite strip for the electronic industry according to claim 1, wherein the baking temperature of the tundish in the step (2) is 100-200 ℃ higher than the melting point of metallic nickel; the purity of the high-purity Ar gas is more than 99.9 percent by weight.
3. The method for producing a pure nickel-aluminum composite strip for the electronics industry according to claim 1, wherein in step (3), the metallic nickel deposition billet is cooled to a temperature below 200 ℃.
4. The method for producing a pure nickel-aluminum composite strip for the electronic industry according to claim 1, wherein in the step (5), the melting temperature is 100-200 ℃ higher than the melting point of metallic nickel.
5. The method for producing a pure nickel-aluminum composite strip for the electronic industry according to claim 1, wherein the tundish baking temperature in step (6) is 100-150 ℃ higher than the melting point of aluminum.
6. The method for preparing a pure nickel-aluminum composite strip for electronic industry according to claim 1, wherein the highest annealing temperature in the step (7) is 300+/-20 ℃, and the temperature is kept for 30+/-10 minutes.
7. The method for producing a pure nickel-aluminum composite strip for the electronic industry according to claim 1, wherein the thickness of the strip after cold rolling in the step (9) is 0.2mm to 0.3mm, and the surface roughness of the cold rolled strip is controlled to be ra2.0 μm to ra3.5 μm.
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| CN101020999A (en) * | 2007-03-23 | 2007-08-22 | 沈阳航空工业学院 | Planar reciprocating process and apparatus for spraying to deposit multilayer composite material |
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| CN101020999A (en) * | 2007-03-23 | 2007-08-22 | 沈阳航空工业学院 | Planar reciprocating process and apparatus for spraying to deposit multilayer composite material |
| CN102601153A (en) * | 2012-03-14 | 2012-07-25 | 河海大学 | Method for preparing layered nickel/aluminum composite material |
| WO2014101020A1 (en) * | 2012-12-26 | 2014-07-03 | 机械科学研究总院先进制造技术研究中心 | Material increase manufacturing apparatus through multi-metal liquid spray deposition |
| CN105478770A (en) * | 2015-12-03 | 2016-04-13 | 中国航空工业集团公司北京航空材料研究院 | Double-scanning spray forming preparation method of high-carbon wear resisting tool and mold steel |
| CN108754389A (en) * | 2018-05-25 | 2018-11-06 | 任三兵 | A kind of aeroponics and spray coating method prepare the method and device of metallic composite |
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