CN105149769B - The design of lamination composite interlayer, which introduces, makes the method that magnesium alloy is connected with aluminium alloy - Google Patents
The design of lamination composite interlayer, which introduces, makes the method that magnesium alloy is connected with aluminium alloy Download PDFInfo
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- CN105149769B CN105149769B CN201510456474.1A CN201510456474A CN105149769B CN 105149769 B CN105149769 B CN 105149769B CN 201510456474 A CN201510456474 A CN 201510456474A CN 105149769 B CN105149769 B CN 105149769B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/001—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by extrusion or drawing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/14—Preventing or minimising gas access, or using protective gases or vacuum during welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/16—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating with interposition of special material to facilitate connection of the parts, e.g. material for absorbing or producing gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
- B23K20/233—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer
- B23K20/2333—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer one layer being aluminium, magnesium or beryllium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/24—Preliminary treatment
Abstract
The present invention is that the design of lamination composite interlayer introduces the connection method for making magnesium alloy and aluminium alloy, i.e.,：First in magnesium alloy and aluminum alloy surface deposition CuNi alloy firms as the barrier intermediate layer for preventing that magnalium matrix surface from aoxidizing and intermetallic compound generates, then Ag is added between CuNi alloy firm layers reduces the connection temperature in CuNi intermediate layers, form CuNi Ag CuNi lamination composite interlayers, the magnesium alloy of the composite interlayer and aluminium alloy are treated to the assembling of connector again, and 0s~750s is kept the temperature under the conditions of 380~420 DEG C.The present invention avoids the generation of the Mg Al series intermetallic compounds and other intermetallic compounds of brittleness of connecting interface using the composite interlayer；Interconnection technique is activated using electric field, realizes magnesium alloy and aluminium alloy low temp, quick, high-strength soldering under vacuo, reduces connection temperature, the reliability for shortening the Joining Technology cycle, improving jointing.
Description
Technical field
The present invention relates to the connection area of magnesium and aluminium, particularly it is a kind of design and add CuNi-Ag-CuNi laminations it is compound in
Interstratified structure, carries out magnesium alloy and aluminium alloy with electric field activation interconnection technique the connection method of low temperature, quick, high strong ties.
Background technology
Magnesium and aluminium are all coloured light metals, all have the characteristic more excellent than materials such as other non-ferrous metals, steels.Aluminium
Density is small, only 2.7g/cm3；There are high specific strength, specific stiffness, there is excellent conduction, heat conductivility；Good corrosion resistance
The advantages that with plastotype processing performance.Magnesium resource very abundant, gross reserves are estimated more than 100 tons；Most of magnesium alloy specific strengths
Apparently higher than aluminium alloy and steel, elasticity modulus is low to have good damping property, cutting ability to avoid excessive stress concentration
It is good with casting character；Magnesium alloy is special with its excellent thermal conductivity, recuperability, electromagnetism interference and excellent shielding properties etc.
Point, is known as " green engineering material ", is widely used in metallurgy, automobile, aerospace, optical instrument, computer, electronics with leading to
The fields such as letter, electronic, pneumatic tools and Medical Devices.Magnesium has certain similitude with aluminium in performance, and application field is all very
Extensively, in order to meet some special requirements and purposes, studying the connectivity problem of magnesium alloy and aluminium alloy is extremely necessary.
The connection of magnesium and aluminium is divided into melting welding and Solid-State Welding according to state of the welding base metal in welding.Magnesium and aluminium it is physical
Matter difference is larger, and the two chemical property is active, and antioxygenic property is poor, and weld metal zone is also easy to produce crackle, stomata, deformation etc. during melting welding
Weld defect；When magnesium is welded with aluminium with traditional Solid-phase welding method, it is crisp that welding point interface easily produces substantial amounts of high rigidity
The Mg-Al series intermetallic compound layers of property, seriously reduce the mechanical property of magnalium welding point.There is scholar to wish logical in recent years
Addition intermediate layer is crossed to solve the problems, such as that the direct weld strength of magnesium and aluminium is low.Zhao Limin etc. is with the method for hot dip in magnesium and aluminium surface
Welded after galvanized alloy, the addition in kirsite intermediate layer effectively prevents direct phase counterdiffusion between magnesium and aluminium, prevents crisp
The generation of property magnalium series intermetallic compound, improves the intensity of welding point (referring to document：L.M.Zhao and
Z.D.Zhang.Effect of Zn alloy interlayer on interface microstructure and
strength of diffusion-bonded Mg–Al joints.Scripta Materialia,2008,(58):283–
286.).Wang Yiyu etc. is welded by magnetron sputtering after magnesium deposits Ag films with aluminium surface, and the addition of Ag films avoids
The generation of Mg-Al series intermetallic compounds, strength of joint reach 14.5MPa (referring to document：Yiyu Wang,Guoqiang
Luo,Jian Zhang,Qiang Shen,Lianmeng Zhang.Microstructure and mechanical
properties of diffusion-bonded Mg–Al joints using silver film as
interlayer.Materials Science&Engineering A,2013,(559):868–874.).The addition nickel such as build
Paper tinsel aluminium film composite interlayer, with magnetron sputtering in magnesium surface deposition of aluminum film, then adds nickel foil between magnesium and aluminium and is expanded
Welding is dissipated, addition composite interlayer equally prevents the generation of high rigidity brittleness magnesium aluminium intermetallic compound, further improves and connect
Head intensity, welding point shear strength is up to 25.8MPa (referring to document：Jian Zhang,Guoqiang Luo,Yiyu Wang,
Yuan Xiao,Qiang Shen,Lianmeng Zhang.Effect of Al thin film and Ni foil
interlayer on diffusion bonded Mg–Al dissimilar joints.Journal of Alloys and
Compounds,2013,(556):139–142.).At present, magnesium designs with aluminum dissimilar metal and adds composite interlayer, and low
There is not been reported for the quick connection connection of temperature activation.
The content of the invention
The technical problems to be solved by the invention are：A kind of design is provided and introduces the compound centre of CuNi-Ag-CuNi laminations
Layer, and the method that quick, low temperature, high strong ties connect is carried out to magnesium alloy and aluminium alloy by electric field activation interconnection technique.
The present invention solves its technical problem and uses following technical solution：
A kind of design introducing the present invention is to provide lamination composite interlayer makes the connection method of magnesium alloy and aluminium alloy,
Specifically：Being used as first in magnesium alloy and aluminum alloy surface deposition CuNi alloy firms prevents the oxidation of magnalium matrix surface and metal
Between the barrier intermediate layer that generates of compound, Ag is then added between CuNi alloy firm layers reduces the connection temperature in CuNi intermediate layers
Degree, form CuNi-Ag-CuNi lamination composite interlayers, then by the magnesium alloy of the composite interlayer of lamination containing CuNi-Ag-CuNi with
Aluminium alloy treats the assembling of connector, finally activates Joining Technology using electric field, will contain CuNi-Ag-CuNi lamination composite interlayers
Magnesium alloy and aluminium alloy be 380~420 DEG C in temperature under the conditions of keep the temperature 0s~750s, realize in lamination containing CuNi-Ag-CuNi
The magnesium alloy of interbed and the high strong ties of aluminium alloy.
Cu atoms account for 40%~60% (at%) in the CuNi alloy firms.
The CuNi alloy firms thickness is 0.5 μm~3 μm.
The quality purity of the Ag is 99.99%, and thickness is 5 μm~35 μm.
The electric field activates Joining Technology：Axial compressive force is 3~10MPa, vacuum<10-1Pa, soak time 20
~100s, electric current are 50~200A, and heating rate is 80~150 DEG C/min, and 0s~750s is kept the temperature at 380~420 DEG C.
The aluminium alloy is LY12 or 6061 aluminium alloys, or aluminium alloy is replaced by fine aluminium.
The magnesium alloy is AZ31B or MB2 magnesium alloys, or magnesium alloy is replaced by pure magnesium.
The present invention has following main feature compared with prior art：
1. depositing CuNi alloys as barrier layer in magnesium alloy and aluminum alloy surface, magnesium alloy and aluminum alloy surface are changed
Property, reduce the oxidation of surface to be welded；Secondly, there is good combination using the intermediate layer and matrix of depositional mode, improve connection
The atomic contacts in stage, reduce atoms permeating activation and and can connect difficulty.
2. design and the CuNi-Ag-CuNi lamination composite interlayers that introduce, effectively prevent straight between Mg, Al atom
Diffusion is connect, the addition of Ag reduces the welding temperature between CuNi.Relatively low welding temperature causes each interface of welding point：Mg
Formed between alloy and CuNi alloy firms, between Ag paper tinsels and CuNi alloy firms, between Al alloys and CuNi alloy firms solid
Solution, rather than weld metal zone brittle intermetallic thing, ensure that high strong ties.
3. make it that connecting temperature further reduces using using electric field activation Joining Technology, the initial rank of electric field activation connection
Duan Liyong DC pulse is pressed in the scattered high-temperature plasma produced between weld interface, and it is net to carry out surface to materials to be welded
Change, activate and be evenly heated；Using direct current it is directly compound to the lamination containing CuNi-Ag-CuNi in graphite grinding tool and mould in
The magnesium alloy of interbed carries out electrified regulation with aluminium alloy part to be welded, has the very high thermal efficiency, firing rate is fast, sintering time
It is short, greatly shorten the welding procedure cycle.
4. this method technique is simple, the cycle is short, adaptable, and profit is with promoting, suitable for the low of other different metal materials
Warm, quick, high strong ties.
In short, the present invention changes magnesium alloy and aluminum alloy surface by depositing CuNi layers in magnesium alloy and aluminum alloy surface
Property, the Mg-Al systems intermetallic of brittleness of connecting interface is effectively avoided using CuNi-Ag-CuNi laminations composite interlayer
The generation of thing and other intermetallic compounds；Using electric field activate interconnection technique, realize under vacuum magnesium alloy with
Aluminium alloy low temp, quick, high-strength soldering, reduce connection temperature, shorten the Joining Technology cycle, improve the reliable of jointing
Property.It it is 400 DEG C in welding temperature, welding pressure keeps the temperature 10min under conditions of being 5MPa, the shear strength of obtained welding point
For 55.8MPa.
Brief description of the drawings
Fig. 1 is the process flow chart of the present invention.
Fig. 2 is the surface (a) for the corronil film for depositing 1.5 μ m thicks in aluminum alloy surface using magnetron sputtering technique
And section (b) microstructure scanning electron microscope secondary electron figure.
Fig. 3 is 400 DEG C, welding pressure 5MPa of welding temperature, and welding point interface is shown under soaking time 600s welding conditions
Micro-structure scanning electron microscope backscattered electron figure.
Fig. 4 is 400 DEG C, welding pressure 5MPa of welding temperature, welding point Interface Element under soaking time 600s welding conditions
The line scanning figure of element distribution.
Fig. 5 is 400 DEG C, welding pressure 5MPa of welding temperature, and welding point Mg sides are broken under soaking time 600s welding conditions
Mouth microstructure scanning electron microscope backscattered electron figure.
Fig. 6 is 400 DEG C, welding pressure 5MPa of welding temperature, and welding point Al sides are broken under soaking time 600s welding conditions
Mouth microstructure scanning electron microscope backscattered electron figure.
Embodiment
The magnesium alloy provided by the invention for designing and introducing CuNi-Ag-CuNi lamination composite interlayers is waited to connect with aluminium alloy
The electric field activation connection method of fitting, its technical process is as follows, deposits CuNi alloy-layers in welding base metal surface to be welded first,
With forming CuNi-Ag-CuNi lamination composite interlayers together with Ag, electric field activation Joining Technology is recycled to realize magnesium alloy and aluminium
The low temperature of alloy, quick, high strong ties.
With reference to embodiment and attached drawing, the present invention will be further described, but is not limited to content described below.
Embodiment 1
Fig. 1 is the process flow chart of the present invention.Magnesium alloy part to be welded be size be Φ 25mm × 5mm MB2 magnesium alloys, aluminium
Alloy part to be welded is the LY12 aluminium alloys that size is Φ 25mm × 5mm, and the size of silver foil is Φ 25mm × 30 μm, and magnetron sputtering sinks
Cu atoms account for 50% (at%) in long-pending CuNi alloys, and film thickness is 1.5 μm.Diffusion technology for welding condition is：Welding temperature
400 DEG C, welding pressure 5MPa, soaking time 600s.
It is comprised the following steps that：
1. the mechanical processing and removing surface of raw material magnesium alloy and aluminium alloy：
Magnesium alloy and aluminium alloy are processed into circle sheet with ultra precision surface grinding machine, 1000#, 1500#, 2000# are used before welding
The surface to be welded of SiC sand paper polishing circle sheet, is then polished buffed surface with high precision polishing machine, after silver foil and polishing
Magnesium alloy is put into organic solvent for ultrasonic cleaning 5min.
2. magnesium alloy treats the magnetron sputtering deposition CuNi alloy firms of joint face with aluminium alloy：
Treated magnesium alloy and aluminium alloy are put into high vacuum magnetron sputtering apparatus sample room, chamber vacuum degree reaches
To 10-3~10-4After Pa, use magnetron sputtered deposition technology thin for 1.5 μm of corronil in part to be welded burnishing surface deposit thickness
Film.Fig. 2 is the microstructure for the CuNi alloy firms for being deposited on aluminum alloy surface, and film crystal unity is high, fine and close, uniform, surface
There is certain roughness.
The magnetron sputtering deposition corronil thin-film process technique is：Substrate temperature is 400 DEG C, heating rate 1
DEG C/s~5 DEG C/s, sputtering power 100w, argon pressure 2.0Pa, sedimentation time 30min, target-substrate distance for 15cm~
25cm。
3. the PAS of magnesium alloy and aluminium alloy part to be welded containing composite interlayer is welded：
Mg alloys/CuNi alloy firms, Ag paper tinsels, Al alloys/CuNi alloy firms are put into connecting mold successively, will be welded
Mould, which is put into plasma activated sintering equipment (PAS) cavity, carries out electric field activation connection, applies axial compressive force to weldment
5MPa, when chamber vacuum degree reaches 10-3~10-4After Pa, after the activation stage of 30s, begin to warm up, its temperature schedule is：It is first
360 DEG C first are warming up to the heating rate of 90 DEG C/min~110 DEG C/min, then with the heating speed of 5 DEG C/min~20 DEG C/min
Rate is warming up to 400 DEG C, 400 DEG C keep the temperature 600s, then with the rate of temperature fall of 10 DEG C/min~15 DEG C/min be cooled to 250 DEG C~
300 DEG C, less than 50 DEG C finally are cooled to the rate of temperature fall of 25 DEG C/min~30 DEG C/min, takes out weldment.
Fig. 3 is the microstructure of Diffusion Welding joint interface, wherein：Numbering 1 is magnesium alloy substrate, and numbering 2 is closed for cupro-nickel
Gold thin film, numbering 3 are silver, and numbering 4 is alloy matrix aluminum.Can be seen that joint interface from joint interface microstructure does not have gas
The defects of hole, micro-crack, be well combined between intermediate layer and matrix, composite interlayer, without weld metal zone brittle intermetallic thing
Generation.Fig. 4 is joint interface elemental line scan distribution map, it can be seen from the figure that the addition of corronil film and silver foil
The direct phase counterdiffusion of magnesium, aluminium element is effectively organized, while magnesium alloy has to corronil film layer and fills respectively with aluminium alloy
The diffusion divided, silver also have sufficient diffusion to cupro-nickel film layer, form reliable connection.Fig. 5, Fig. 6 be respectively fracture magnesium side,
The microstructure of aluminum side, fracture can be clearly visible dimple, be obvious ductile rupture, this is also the reason for strength of joint is higher.
Obtained weldment is completely embedded, collimation is good.Testing result shows that weldment shearing strength of joint reaches 55.8MPa.
Embodiment 2
Magnesium alloy part to be welded is the MB2 magnesium alloys that size is Φ 25mm × 5mm, and aluminium alloy part to be welded is that size is Φ 25mm
The LY12 aluminium alloys of × 5mm, the size of silver foil are Φ 25mm × 30 μm, and Cu atoms account in the CuNi alloys of magnetron sputtering deposition
50% (at%), film thickness are 1.5 μm.Diffusion technology for welding condition is：380 DEG C, welding pressure 5MPa of welding temperature, insulation
Time is 600s.
It is comprised the following steps that：
1. the mechanical processing and removing surface of raw material magnesium alloy and aluminium alloy：
Magnesium alloy and aluminium alloy are processed into circle sheet with ultra precision surface grinding machine, 1000#, 1500#, 2000# are used before welding
The surface to be welded of SiC sand paper polishing circle sheet, is then polished buffed surface with high precision polishing machine, after silver foil and polishing
Magnesium alloy is put into organic solvent for ultrasonic cleaning 5min.
2. magnesium alloy treats the magnetron sputtering deposition CuNi alloy firms of joint face with aluminium alloy：
Treated magnesium alloy and aluminium alloy are put into high vacuum magnetron sputtering apparatus sample room, chamber vacuum degree reaches
To 10-3~10-4After Pa, use magnetron sputtered deposition technology thin for 1.5 μm of corronil in part to be welded burnishing surface deposit thickness
Film.
The magnetron sputtering deposition corronil thin-film process technique is：Substrate temperature is 400 DEG C, heating rate 1
DEG C/s~5 DEG C/s, sputtering power 100w, argon pressure 2.0Pa, sedimentation time 30min, target-substrate distance for 15cm~
25cm。
3. the PAS of magnesium alloy and aluminium alloy part to be welded containing composite interlayer is welded：
Mg alloys/CuNi alloy firms, Ag paper tinsels, Al alloys/CuNi alloy firms are put into connecting mold successively, will be welded
Mould, which is put into plasma activated sintering equipment (PAS) cavity, carries out electric field activation connection, applies axial compressive force to weldment
5MPa, when chamber vacuum degree reaches 10-3~10-4After Pa, after the activation stage of 30s, begin to warm up, its temperature schedule is：It is first
340 DEG C first are warming up to the heating rate of 90 DEG C/min~110 DEG C/min, then with the heating speed of 5 DEG C/min~20 DEG C/min
Rate is warming up to 380 DEG C, 380 DEG C keep the temperature 300s, then with the rate of temperature fall of 10 DEG C/min~15 DEG C/min be cooled to 250 DEG C~
300 DEG C, less than 50 DEG C finally are cooled to the rate of temperature fall of 25 DEG C/min~30 DEG C/min, takes out weldment.
Obtained weldment is completely embedded, collimation is good.Testing result shows that weldment shearing strength of joint reaches
22.8MPa。
Embodiment 3
Magnesium alloy part to be welded is the MB2 magnesium alloys that size is Φ 25mm × 5mm, and aluminium alloy part to be welded is that size is Φ 25mm
The LY12 aluminium alloys of × 5mm, the size of silver foil are Φ 25mm × 30 μm, and Cu atoms account in the CuNi alloys of magnetron sputtering deposition
50% (at%), film thickness are 1.5 μm.Diffusion technology for welding condition is：420 DEG C, welding pressure 5MPa of welding temperature, insulation
Time is 600s.
It is comprised the following steps that：
1. the mechanical processing and removing surface of raw material magnesium alloy and aluminium alloy：
Magnesium alloy and aluminium alloy are processed into circle sheet with ultra precision surface grinding machine, 1000#, 1500#, 2000# are used before welding
The surface to be welded of SiC sand paper polishing circle sheet, is then polished buffed surface with high precision polishing machine, after silver foil and polishing
Magnesium alloy is put into organic solvent for ultrasonic cleaning 5min.
2. magnesium alloy treats the magnetron sputtering deposition CuNi alloy firms of joint face with aluminium alloy：
Treated magnesium alloy and aluminium alloy are put into high vacuum magnetron sputtering apparatus sample room, chamber vacuum degree reaches
To 10-3~10-4After Pa, use magnetron sputtered deposition technology thin for 1.5 μm of corronil in part to be welded burnishing surface deposit thickness
Film.
The magnetron sputtering deposition corronil thin-film process technique is：Substrate temperature is 400 DEG C, heating rate 1
DEG C/s~5 DEG C/s, sputtering power 100w, argon pressure 2.0Pa, sedimentation time 30min, target-substrate distance for 15cm~
25cm。
3. the PAS of magnesium alloy and aluminium alloy part to be welded containing composite interlayer is welded：
Mg alloys/CuNi alloy firms, Ag paper tinsels, Al alloys/CuNi alloy firms are put into graphite jig successively, by graphite
Mould, which is put into plasma activated sintering equipment (PAS) cavity, carries out electric field activation connection, applies axial compressive force to weldment
5MPa, when chamber vacuum degree reaches 10-3~10-4After Pa, after the activation stage of 30s, begin to warm up, its temperature schedule is：It is first
380 DEG C first are warming up to the heating rate of 90 DEG C/min~110 DEG C/min, then with the heating speed of 5 DEG C/min~20 DEG C/min
Rate is warming up to 420 DEG C, 420 DEG C keep the temperature 600s, then with the rate of temperature fall of 10 DEG C/min~15 DEG C/min be cooled to 250 DEG C~
300 DEG C, less than 50 DEG C finally are cooled to the rate of temperature fall of 25 DEG C/min~30 DEG C/min, takes out weldment.
Obtained weldment is completely embedded, collimation is good.Testing result shows that weldment shearing strength of joint reaches
13.6MPa。
Embodiment 4
Magnesium alloy part to be welded is the MB2 magnesium alloys that size is Φ 25mm × 5mm, and aluminium alloy part to be welded is that size is Φ 25mm
The LY12 aluminium alloys of × 5mm, the size of silver foil are Φ 25mm × 30 μm, and Cu atoms account in the CuNi alloys of magnetron sputtering deposition
50% (at%), film thickness are 1.5 μm.Diffusion technology for welding condition is：400 DEG C, welding pressure 5MPa of welding temperature, insulation
Time is 0s.
It is comprised the following steps that：
1. the mechanical processing and removing surface of raw material magnesium alloy and aluminium alloy：
Magnesium alloy and aluminium alloy are processed into circle sheet with ultra precision surface grinding machine, 1000#, 1500#, 2000# are used before welding
The surface to be welded of SiC sand paper polishing circle sheet, is then polished buffed surface with high precision polishing machine, after silver foil and polishing
Magnesium alloy is put into organic solvent for ultrasonic cleaning 5min.
2. magnesium alloy treats the magnetron sputtering deposition CuNi alloy firms of joint face with aluminium alloy：
Treated magnesium alloy and aluminium alloy are put into high vacuum magnetron sputtering apparatus sample room, chamber vacuum degree reaches
To 10-3~10-4After Pa, use magnetron sputtered deposition technology thin for 1.5 μm of corronil in part to be welded burnishing surface deposit thickness
Film.
The magnetron sputtering deposition corronil thin-film process technique is：Substrate temperature is 400 DEG C, heating rate 1
DEG C/s~5 DEG C/s, sputtering power 100w, argon pressure 2.0Pa, sedimentation time 30min, target-substrate distance for 15cm~
25cm。
3. the high strong ties of magnesium alloy and aluminium alloy：
Mg alloys/CuNi alloy firms, Ag paper tinsels, Al alloys/CuNi alloy firms are put into connecting mold successively, will be welded
Mould, which is put into plasma activated sintering equipment (PAS) cavity, carries out electric field activation connection, applies axial compressive force to weldment
5MPa, when chamber vacuum degree reaches 10-3~10-4After Pa, after the activation stage of 30s, begin to warm up, its temperature schedule is：It is first
360 DEG C first are warming up to the heating rate of 90 DEG C/min~110 DEG C/min, then with the heating speed of 5 DEG C/min~20 DEG C/min
Rate is warming up to 400 DEG C, 400 DEG C keep the temperature 0s, then with the rate of temperature fall of 10 DEG C/min~15 DEG C/min be cooled to 250 DEG C~
300 DEG C, less than 50 DEG C finally are cooled to the rate of temperature fall of 25 DEG C/min~30 DEG C/min, takes out weldment.
Obtained weldment is completely embedded, collimation is good.Testing result shows that weldment shearing strength of joint reaches 7.8MPa.
Embodiment 5
Magnesium alloy part to be welded is the MB2 magnesium alloys that size is Φ 25mm × 5mm, and aluminium alloy part to be welded is that size is Φ 25mm
The LY12 aluminium alloys of × 5mm, the size of silver foil are Φ 25mm × 30 μm, and Cu atoms account in the CuNi alloys of magnetron sputtering deposition
50% (at%), film thickness are 1.5 μm.Diffusion technology for welding condition is：400 DEG C, welding pressure 5MPa of welding temperature, insulation
Time is 750s.
It is comprised the following steps that：
1. the mechanical processing and removing surface of raw material magnesium alloy and aluminium alloy：
Magnesium alloy and aluminium alloy are processed into circle sheet with ultra precision surface grinding machine, 1000#, 1500#, 2000# are used before welding
The surface to be welded of SiC sand paper polishing circle sheet, is then polished buffed surface with high precision polishing machine, after silver foil and polishing
Magnesium alloy is put into organic solvent for ultrasonic cleaning 5min.
2. magnesium alloy treats the magnetron sputtering deposition CuNi alloy firms of joint face with aluminium alloy：
Treated magnesium alloy and aluminium alloy are put into high vacuum magnetron sputtering apparatus sample room, chamber vacuum degree reaches
To 10-3~10-4After Pa, Cu atoms account for 50% (at%) in the CuNi alloys of magnetron sputtering deposition, and film thickness is 1.5 μm.
The magnetron sputtering deposition corronil thin-film process technique is：Substrate temperature is 400 DEG C, heating rate 1
DEG C/s~5 DEG C/s, sputtering power 100w, argon pressure 2.0Pa, sedimentation time 30min, target-substrate distance for 15cm~
25cm。
3. the PAS of magnesium alloy and aluminium alloy part to be welded containing composite interlayer is welded：
Mg alloys/CuNi alloy firms, Ag paper tinsels, Al alloys/CuNi alloy firms are put into connecting mold successively, will be welded
Mould, which is put into plasma activated sintering equipment (PAS) cavity, carries out electric field activation connection, applies axial compressive force to weldment
5MPa, when chamber vacuum degree reaches 10-3~10-4After Pa, after the activation stage of 30s, begin to warm up, its temperature schedule is：It is first
360 DEG C first are warming up to the heating rate of 90 DEG C/min~110 DEG C/min, then with the heating speed of 5 DEG C/min~20 DEG C/min
Rate is warming up to 400 DEG C, 400 DEG C keep the temperature 750s, then with the rate of temperature fall of 10 DEG C/min~15 DEG C/min be cooled to 250 DEG C~
300 DEG C, less than 50 DEG C finally are cooled to the rate of temperature fall of 25 DEG C/min~30 DEG C/min, takes out weldment.
Obtained weldment is completely embedded, collimation is good.Testing result shows that weldment shearing strength of joint reaches
46.4MPa。
Example 6
Magnesium alloy part to be welded is the MB2 magnesium alloys that size is Φ 25mm × 5mm, and aluminium alloy part to be welded is that size is Φ 25mm
The LY12 aluminium alloys of × 5mm, the size of silver foil are Φ 25mm × 30 μm, and Cu atoms account in the CuNi alloys of magnetron sputtering deposition
40% (at%), film thickness are 1.5 μm.Diffusion technology for welding condition is：400 DEG C, welding pressure 5MPa of welding temperature, insulation
Time is 600s.
It is comprised the following steps that：
1. the mechanical processing and removing surface of raw material magnesium alloy and aluminium alloy：
Magnesium alloy and aluminium alloy are processed into circle sheet with ultra precision surface grinding machine, 1000#, 1500#, 2000# are used before welding
The surface to be welded of SiC sand paper polishing circle sheet, is then polished buffed surface with high precision polishing machine, after silver foil and polishing
Magnesium alloy is put into organic solvent for ultrasonic cleaning 5min.
2. magnesium alloy treats the magnetron sputtering deposition CuNi alloy firms of joint face with aluminium alloy：
Treated magnesium alloy and aluminium alloy are put into high vacuum magnetron sputtering apparatus sample room, chamber vacuum degree reaches
To 10-3~10-4After Pa, Cu atoms account for 40% (at%) in the CuNi alloys of magnetron sputtering deposition, and film thickness is 1.5 μm.
The magnetron sputtering deposition corronil thin-film process technique is：Substrate temperature is 400 DEG C, heating rate 1
DEG C/s~5 DEG C/s, sputtering power 100w, argon pressure 2.0Pa, sedimentation time 30min, target-substrate distance for 15cm~
25cm。
3. the PAS of magnesium alloy and aluminium alloy part to be welded containing composite interlayer is welded：
Mg alloys/CuNi alloy firms, Ag paper tinsels, Al alloys/CuNi alloy firms are put into connecting mold successively, will be welded
Mould, which is put into plasma activated sintering equipment (PAS) cavity, carries out electric field activation connection, applies axial compressive force to weldment
5MPa, when chamber vacuum degree reaches 10-3~10-4After Pa, after the activation stage of 30s, begin to warm up, its temperature schedule is：It is first
360 DEG C first are warming up to the heating rate of 90 DEG C/min~110 DEG C/min, then with the heating speed of 5 DEG C/min~20 DEG C/min
Rate is warming up to 400 DEG C, 400 DEG C keep the temperature 600s, then with the rate of temperature fall of 10 DEG C/min~15 DEG C/min be cooled to 250 DEG C~
300 DEG C, less than 50 DEG C finally are cooled to the rate of temperature fall of 25 DEG C/min~30 DEG C/min, takes out weldment.
Obtained weldment is completely embedded, collimation is good.Testing result shows that weldment shearing strength of joint reaches
30.5MPa。
Example 7
Magnesium alloy part to be welded is the MB2 magnesium alloys that size is Φ 25mm × 5mm, and aluminium alloy part to be welded is that size is Φ 25mm
The LY12 aluminium alloys of × 5mm, the size of silver foil are Φ 25mm × 30 μm, and Cu atoms account in the CuNi alloys of magnetron sputtering deposition
60% (at%), film thickness are 1.5 μm.Diffusion technology for welding condition is：400 DEG C, welding pressure 5MPa of welding temperature, insulation
Time is 600s.
It is comprised the following steps that：
1. the mechanical processing and removing surface of raw material magnesium alloy and aluminium alloy：
Magnesium alloy and aluminium alloy are processed into circle sheet with ultra precision surface grinding machine, 1000#, 1500#, 2000# are used before welding
The surface to be welded of SiC sand paper polishing circle sheet, is then polished buffed surface with high precision polishing machine, after silver foil and polishing
Magnesium alloy is put into organic solvent for ultrasonic cleaning 5min.
2. magnesium alloy treats the magnetron sputtering deposition CuNi alloy firms of joint face with aluminium alloy：
Treated magnesium alloy and aluminium alloy are put into high vacuum magnetron sputtering apparatus sample room, chamber vacuum degree reaches
To 10-3~10-4After Pa, Cu atoms account for 60% (at%) in the CuNi alloys of magnetron sputtering deposition, and film thickness is 1.5 μm.
The magnetron sputtering deposition corronil thin-film process technique is：Substrate temperature is 400 DEG C, heating rate 1
DEG C/s~5 DEG C/s, sputtering power 100w, argon pressure 2.0Pa, sedimentation time 30min, target-substrate distance for 15cm~
25cm。
3. the PAS of magnesium alloy and aluminium alloy part to be welded containing composite interlayer is welded：
Mg alloys/CuNi alloy firms, Ag paper tinsels, Al alloys/CuNi alloy firms are put into connecting mold successively, will be welded
Mould, which is put into plasma activated sintering equipment (PAS) cavity, carries out electric field activation connection, applies axial compressive force to weldment
5MPa, when chamber vacuum degree reaches 10-3~10-4After Pa, after the activation stage of 30s, begin to warm up, its temperature schedule is：It is first
360 DEG C first are warming up to the heating rate of 90 DEG C/min~110 DEG C/min, then with the heating speed of 5 DEG C/min~20 DEG C/min
Rate is warming up to 400 DEG C, 400 DEG C keep the temperature 600s, then with the rate of temperature fall of 10 DEG C/min~15 DEG C/min be cooled to 250 DEG C~
300 DEG C, less than 50 DEG C finally are cooled to the rate of temperature fall of 25 DEG C/min~30 DEG C/min, takes out weldment.
Obtained weldment is completely embedded, collimation is good.Testing result shows that weldment shearing strength of joint reaches
39.8MPa。
Example 8
Magnesium alloy part to be welded is the MB2 magnesium alloys that size is Φ 25mm × 5mm, and aluminium alloy part to be welded is that size is Φ 25mm
The LY12 aluminium alloys of × 5mm, the size of silver foil are Φ 25mm × 5 μm, and Cu atoms account in the CuNi alloys of magnetron sputtering deposition
50% (at%), film thickness are 1.5 μm.Diffusion technology for welding condition is：400 DEG C, welding pressure 5MPa of welding temperature, insulation
Time is 600s.
It is comprised the following steps that：
1. the mechanical processing and removing surface of raw material magnesium alloy and aluminium alloy：
Magnesium alloy and aluminium alloy are processed into circle sheet with ultra precision surface grinding machine, 1000#, 1500#, 2000# are used before welding
The surface to be welded of SiC sand paper polishing circle sheet, is then polished buffed surface with high precision polishing machine, after silver foil and polishing
Magnesium alloy is put into organic solvent for ultrasonic cleaning 5min.
2. magnesium alloy treats the magnetron sputtering deposition CuNi alloy firms of joint face with aluminium alloy：
Treated magnesium alloy and aluminium alloy are put into high vacuum magnetron sputtering apparatus sample room, chamber vacuum degree reaches
To 10-3~10-4After Pa, Cu atoms account for 50% (at%) in the CuNi alloys of magnetron sputtering deposition, and film thickness is 1.5 μm.
The magnetron sputtering deposition corronil thin-film process technique is：Substrate temperature is 400 DEG C, heating rate 1
DEG C/s~5 DEG C/s, sputtering power 100w, argon pressure 2.0Pa, sedimentation time 30min, target-substrate distance for 15cm~
25cm。
3. the PAS of magnesium alloy and aluminium alloy part to be welded containing composite interlayer is welded：
Mg alloys/CuNi alloy firms, Ag paper tinsels, Al alloys/CuNi alloy firms are put into connecting mold successively, will be welded
Mould, which is put into plasma activated sintering equipment (PAS) cavity, carries out electric field activation connection, applies axial compressive force to weldment
5MPa, when chamber vacuum degree reaches 10-3~10-4After Pa, after the activation stage of 30s, begin to warm up, its temperature schedule is：It is first
360 DEG C first are warming up to the heating rate of 90 DEG C/min~110 DEG C/min, then with the heating speed of 5 DEG C/min~20 DEG C/min
Rate is warming up to 400 DEG C, 400 DEG C keep the temperature 600s, then with the rate of temperature fall of 10 DEG C/min~15 DEG C/min be cooled to 250 DEG C~
300 DEG C, less than 50 DEG C finally are cooled to the rate of temperature fall of 25 DEG C/min~30 DEG C/min, takes out weldment.
Obtained weldment is completely embedded, collimation is good.Testing result shows that weldment shearing strength of joint reaches
50.9MPa。
Example 9
Magnesium alloy part to be welded is the MB2 magnesium alloys that size is Φ 25mm × 5mm, and aluminium alloy part to be welded is that size is Φ 25mm
The LY12 aluminium alloys of × 5mm, the size of silver foil are Φ 25mm × 35 μm, and Cu atoms account in the CuNi alloys of magnetron sputtering deposition
40% (at%), film thickness are 1.5 μm.Diffusion technology for welding condition is：400 DEG C, welding pressure 5MPa of welding temperature, insulation
Time is 600s.
It is comprised the following steps that：
1. the mechanical processing and removing surface of raw material magnesium alloy and aluminium alloy：
Magnesium alloy and aluminium alloy are processed into circle sheet with ultra precision surface grinding machine, 1000#, 1500#, 2000# are used before welding
The surface to be welded of SiC sand paper polishing circle sheet, is then polished buffed surface with high precision polishing machine, after silver foil and polishing
Magnesium alloy is put into organic solvent for ultrasonic cleaning 5min.
2. magnesium alloy treats the magnetron sputtering deposition CuNi alloy firms of joint face with aluminium alloy：
Treated magnesium alloy and aluminium alloy are put into high vacuum magnetron sputtering apparatus sample room, chamber vacuum degree reaches
To 10-3~10-4After Pa, Cu atoms account for 40% (at%) in the CuNi alloys of magnetron sputtering deposition, and film thickness is 1.5 μm.
The magnetron sputtering deposition corronil thin-film process technique is：Substrate temperature is 400 DEG C, heating rate 1
DEG C/s~5 DEG C/s, sputtering power 100w, argon pressure 2.0Pa, sedimentation time 30min, target-substrate distance for 15cm~
25cm。
3. the PAS of magnesium alloy and aluminium alloy part to be welded containing composite interlayer is welded：
Mg alloys/CuNi alloy firms, Ag paper tinsels, Al alloys/CuNi alloy firms are put into connecting mold successively, will be welded
Mould, which is put into plasma activated sintering equipment (PAS) cavity, carries out electric field activation connection, applies axial compressive force to weldment
5MPa, when chamber vacuum degree reaches 10-3~10-4After Pa, after the activation stage of 30s, begin to warm up, its temperature schedule is：It is first
360 DEG C first are warming up to the heating rate of 90 DEG C/min~110 DEG C/min, then with the heating speed of 5 DEG C/min~20 DEG C/min
Rate is warming up to 400 DEG C, 400 DEG C keep the temperature 600s, then with the rate of temperature fall of 10 DEG C/min~15 DEG C/min be cooled to 250 DEG C~
300 DEG C, less than 50 DEG C finally are cooled to the rate of temperature fall of 25 DEG C/min~30 DEG C/min, takes out weldment.
Obtained weldment is completely embedded, collimation is good.Testing result shows that weldment shearing strength of joint reaches
30.2MPa。
Claims (7)
1. the connection method of a kind of magnesium alloy and aluminium alloy, closes magnesium it is characterized in that a kind of design of lamination composite interlayer introduces
The connection method of gold and aluminium alloy, is specifically：Being used as first in magnesium alloy with aluminum alloy surface deposition CuNi alloy firms prevents
Magnalium matrix surface aoxidizes and the barrier intermediate layer of intermetallic compound generation, then adds Ag between CuNi alloy firm layers
The connection temperature in CuNi intermediate layers is reduced, then by Mg alloys/CuNi alloy firms, Ag paper tinsels, AI alloys/CuNi alloy firms successively
Assembling, forms CuNi-Ag-CuNi lamination composite interlayers, finally activates Joining Technology using electric field, will contain CuNi-Ag-CuNi
The magnesium alloy of lamination composite interlayer keeps the temperature 0s~750s with aluminium alloy under the conditions of temperature is 380~420 DEG C, and realization contains
The magnesium alloy in CuNi-Ag-CuNi laminations intermediate layer and the high strong ties of aluminium alloy.
2. the connection method of magnesium alloy as claimed in claim 1 and aluminium alloy, it is characterised in that the CuNi alloy firms
Middle Cu atoms account for 40%~60% (at%).
3. the connection method of magnesium alloy as claimed in claim 1 and aluminium alloy, it is characterised in that the CuNi alloy firms
Thickness is 0.5 μm~3 μm.
4. the connection method of magnesium alloy as claimed in claim 1 and aluminium alloy, it is characterised in that the quality purity of the Ag
For 99.99%, thickness is 5 μm~35 μm.
5. the connection method of magnesium alloy as claimed in claim 1 and aluminium alloy, it is characterised in that the electric field activation connection
Technique is：Axial compressive force is 3~10MPa, vacuum<10-1Pa, soak time are 20~100s, and electric current is 50~200A, heating
Speed is 80~150 DEG C/min.
6. the connection method of magnesium alloy as claimed in claim 1 and aluminium alloy, it is characterised in that the aluminium alloy is LY12
Or 6061 aluminium alloys, or aluminium alloy replaced by fine aluminium.
7. the connection method of magnesium alloy as claimed in claim 1 and aluminium alloy, it is characterised in that the magnesium alloy is AZ31B
Or MB2 magnesium alloys, or magnesium alloy replaced by pure magnesium.
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