CN207271836U - It is a kind of mutually to spell combining structure composite metal - Google Patents
It is a kind of mutually to spell combining structure composite metal Download PDFInfo
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- CN207271836U CN207271836U CN201721041634.7U CN201721041634U CN207271836U CN 207271836 U CN207271836 U CN 207271836U CN 201721041634 U CN201721041634 U CN 201721041634U CN 207271836 U CN207271836 U CN 207271836U
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Abstract
Combining structure type composite metal is mutually spelled the utility model discloses a kind of, at least two or more different metal materials progress solid phases is compound, obtain non-side compound structure type layered composite metal just blank；Plastic Forming processing, aligning and cutting process are carried out to blank at the beginning of obtained layered composite metal, the non-long billot of side compound structure type layered composite metal is made；Slice type cutting technique is used to the obtained non-long billot of side compound structure type layered composite metal, some composite metal bases are made；Composite metal base is processed and is surface-treated and forms composite metal.Obtained sheet metal of mutually spelling at least is combined closely by two or more sheet metals by the side to contact with each other with firm Physical Metallurgy bonding pattern.Phase provided by the utility model, which spells composite metal piece, has more reliable welding characteristic, ensure integrated member it is excellent it is conductive, radiate, loss of weight is connected with transition etc. performance needs while significantly reduce production cost.
Description
Technical field
The utility model patent is related to composite metal technical field, will more specifically be related to a kind of mutually spelling combining structure
Composite metal, can be widely applied to the industrial circles such as electric power, battery, automobile, electronics.
Background technology
Largely need to be matched the metalwork of unlike material in industrial circles such as electric power, battery, automobile, electronics at present
Connection, such as bus collection line, multiple single battery core positive and negative anodes connections, automobile structure, package cooling plate.For example, aluminium has
Resource is compared with horn of plenty, density is small, conductive radiator preferably etc. writes feature, at the same time intensity is relatively low, difficult welding (including scolding tin,
With other non-aluminum metal welding difficulties) its more massive use is limited, therefore aluminum metal is realized by transition metal piece
Part has higher-strength (such as steel, stainless steel, titanium) or more high conductivity (such as copper) or the good welding performance (such as nickel) different with other
The design that is reliably connected of matter metalwork becomes extremely important and crucial.
Exemplified by still with most common light-weight metal (or light metal, mainly including aluminium, magnesium, titanium, lithium etc.) aluminium, aluminum current with
The transition connection of the materials such as copper, steel construction piece uses lamination composite structure such as aluminium/steel, aluminium/copper sleeve material mostly, mainly has
The methods of friction welding (FW), diffusion welding (DW), Pressure Welding.These methods are in stability, manufacture cost, environmental safety, production efficiency
Etc. also be also difficult to solve the problems, such as so far there are some, therefore, it is difficult to popularity.
The patent No. 20101010300705.7, the patent No. 20101010300693.8, the patent No. 20101010300694.2
Scheme of the aluminium with stainless steel, titanium, copper for (folded) laminar composite is individually disclosed, its technical principle is substantially rolling casting bonding
Technique, aluminium will keep one section of long period as liquid (note to other materials top layer solidifying compound in strip casting process：Aluminium is 660
Could be liquid more than DEG C), it can therefore be understood that the program is liquid-solid composite algorithm.And according to light metal (such as aluminium, magnesium, titanium) with
Most of Phase Diagram of Materials of the dissimilar metals such as steel, copper understand that existing heat affected area can be to bond strength near layered interface
Produce significant destruction：Higher temperature and long period feature in liquid-solid recombination process determine these molten light metals
It is very easy to when material surface contact generate thicker intermetallic by being mutually diffused near interface with stainless steel, copper
Thing, and the brittleness of intermetallic compound and the feature of poorly conductive make it that these technical solutions disclosed in above-mentioned patent are difficult to obtain
Interface bond strength height, the laminar composite of good conductivity are obtained, therefore the transit joint as made by with the composite material should
It is not high with reliability.
In addition, under same dissimilar metal piece combined situation, compound (the i.e. two adjacent dissimilar metals of mutually spelling between sheet metal
Piece is combined closely in the side being in contact, and in most cases respectively composition sheet thicknesses are identical, but also have a few cases group
Into sheet metal not uniform thickness) structure compared with the laminated composite structure between sheet metal transit joint design aspect have significant application than
Compared with advantage.Since the concentration heat conduction orientation of heat input (heat as caused by electric resistance welding, high energy beam weldering process) is most during welding
In the case of can be considered perpendicular through whole sheet thicknesses.The transmission of i.e. heat must pass through for lamination composite metal structures
Combination interface, due to aluminium and the various brittleness of dissimilar metal near interface generation, the intermetallic compound of poorly conductive, welds hot shadow
Ring area and destroying infection is produced to compound interface with being difficult to avoid that；And composite metal structures are mutually spelled due to its compound interface and sheet metal
Thickness direction is almost parallel, is easier to realize that the pathway of welding heat avoids compound interface region, therefore in certain condition
Latent destruction that down completely can be to avoid welding heat affected zone to compound interface.Obviously, the mutually spelling between dissimilar metal piece (side is multiple)
The transit joint of structure realizes the optimal design structure being reliably connected between dissimilar metal components.Therefore the patent No.
200910110705.8 " a kind of conductive connecting pieces and its production method of side composite metal structures " propose it is a kind of by by
The scheme for the conductive connecting piece that the side composition metal band transverse stamping that different metal is formed goes out, but especially for class
Intermetallic compound is easily generated under the conditions of thermal diffusion like as the light metal class materials such as aluminium, magnesium, titanium, lithium and other dissimilar materials
Combination, engineering practice shows that this kind of combined material will directly prepare the processing technology difficulty of the Strip of side composite construction
It is at a relatively high：On the one hand using continuous high-energy beam (such as laser, electron beam) directly act on dissimilar metal be in contact side when, wink
Between High temperature diffusion easily to produce the combination that intermetallic compound directly destroys interface between two kinds of materials；Even if on the other hand
Using composite technique for rolling, when entering milling train side by side due to dissimilar metal band, the side to contact with each other mainly passes through rolling
Limitation material spreads caused horizontal direction extruding force and forms fresh combination interface in deformed area, it is clear that in general metal
The width size of band is much larger than thickness direction size, and the extruding force of side compound tense band horizontal direction is actually at this time
Easily occurs rigidity unstable phenomenon at interface to be combined, i.e. energy necessary to interface cohesion is difficult to introduce, so as to cause compound
Failure.These all cause the side composition metal band and its conductive connecting piece that light metal combines with other materials preparation and should
With being difficult to large-scale promotion.
For in the existing application of transition piece of the similar aluminium with other metals (such as steel, stainless steel) and preparation process technology
The problem of, the utility model proposes it is a kind of with the aluminium that production efficiency is high, processing cost is relatively low, connection reliability is high with it is other
The technical solution of the transition connection composite metal of non-aluminum metalwork and preparation method thereof.
Utility model content
The utility model is related to it is a kind of mutually spell combining structure composite metal, can system generally solve it is above-mentioned carried heterogeneous
Application problem in metalwork transition connection procedure.
The technical solution is as described below：
A kind of phase spells the preparation method of combining structure composite metal, and the preparation method comprises the following steps：
S1 it is) that at least two or more different metal materials progress solid phases is compound, obtain non-side compound structure type stratiform
The first blank of composition metal；
S2 Plastic Forming processing, aligning and cutting process) are carried out to blank at the beginning of the obtained layered composite metal of S1 steps,
The long billot of the non-compound layered composite metal in side is made；
S3) to being cut by the obtained non-long billot of side compound structure type layered composite metal of S2 steps using slice type
Technique is cut, some composite metal bases are made, which shows each heterogeneous sheet metal in the spliced knot in the side of adjacent contact
The architectural feature of conjunction；
S4) the composite metal bases of S3 steps is processed and is surface-treated and forms composite metal.
The utility model discloses blank at the beginning of the non-side compound structure type layered composite metal in the S1-S3 steps and
Long billot is one kind of clad structure type composition metal, laminated construction type composition metal or mosaic texture type composition metal.(note：
Layered composite metal material according to the locus constituted mode of its storeroom be broadly divided into clad structure type, laminated construction type,
The several types such as mosaic texture type, side structure type)
The utility model discloses the long billot of clad structure type composition metal obtained by S2 steps equivalent overall diameter or
Thickness is not less than 1.6mm, and each heterogeneous metal carbonyl coat thickness is not less than 0.4mm；Obtained laminated construction type composition metal
The gross thickness of long billot is not less than 0.8mm, and each dissimilar metal combination interface to the long billot of the composition metal surface distance not
Less than 0.4mm；The gross thickness of the obtained long billot of mosaic texture type composition metal is not less than 0.8mm, and each embedding material width is not
Less than 0.8mm, the distance on combination bottom surface to the long billot surface of composition metal of each embedding material and base material is not less than 0.4mm.
It is continuous extrausion process the utility model discloses the solid phase complex method in above-mentioned S1 steps, sheathed extrusion
One kind in method, roll-bonding method, pre-coated combination hubbing, explosion composite method.
The utility model discloses through each dissimilar metal in the long billot of layered composite metal obtained by above-mentioned S2 steps
Between reach Physical Metallurgy bonding degree, the intermetallic compound thickness between each layer metal at combination interface is not more than 5 microns；Through S3
Intermetallic thickness between each dissimilar metal in step in each composite metal base at combination interface is not more than 5 microns.
The utility model discloses above-mentioned S3 steps preferentially using the accurate multi-wire saw method progress carried under cooling condition
Section, if the dry plate base cut out includes each heterogeneous metal layer in the long billot of layered composite metal made from S2 steps, and
The thickness of obtained composite metal base is 0.1~8mm.
The utility model discloses each adjacent dissimilar metal combination circle of composite metal obtained in above-mentioned S4 steps
Face is arranged at when being subsequently applied to welding outside caused heat affected area.
The utility model discloses obtained with the compound of mutually spelling combining structure using above-mentioned preparation method and step
Sheet metal is characterized in that：It includes at least two or more different metal materials, passes through physics smelting between each heterogeneous sheet metal
Gold bonding mode strong bonded on the side being in contact with each other.
On the other hand, the utility model is additionally provided with the composite metal for mutually spelling combining structure, the compound gold
Belong in piece and include at least a kind of light metal piece, the gold formed at the combination interface between the light metal piece and adjacent metal piece
The thickness of compound is not more than 5 microns between category.
Further preferentially, the utility model is disclosed with the composite metal for mutually spelling combining structure, it is characterised in that
The light metal piece includes one kind in aluminium and aluminium alloy, magnesium and magnesium alloy, titanium or titanium alloy, lithium and lithium alloy.
Composite metal disclosed in the utility model is made of two kinds of different sheet metals of material in most cases, but
Under the requirement of some special applications, the structure that three kinds of dissimilar metals are formed will appear from：Easily forming intermetallic compound
A kind of metal (such as zinc, silver) that can play the role of transition metal layer is further added by between dissimilar metal layer, that is, passes through transition metal
The design of layer can reduce or avoid the generation of intermetallic compound to the greatest extent and grow up, thus the final combination improved between dissimilar metal
Intensity (antistripping ability) with meet special applications requirement needs.
The utility model carries out slice type cutting by the long billot of layered composite metal to non-side compound structure type
(note：It is to carry out accurate multi-wire saw through whole thickness direction or diameter along the cross section of long billot in most cases), can be high
Effect, accurate, low cost obtain the essential shape size of piece base needed for (composite metal).Since composite material passes through rolling
Or drawing (i.e. plastic working), slitting (alternative process to be sized), (alternative process is used to improve diffusion heat treatments
Bond strength between dissimilar metal and eliminate machining stress), the finishing means such as aligning can continous way, expeditiously obtain it is high-precision
The long billot appearance and size of degree：The diameter of thickness and width, bar or the sectional dimension of profile shapes such as band, therefore this practicality
The composite metal that the new phase spells combining structure can be preprogrammed to square or rectangle, circle (or even center band logical respectively
Hole), the shape such as abnormal shape.And the cross section on the basis of the long blank of layered composite metal after above-mentioned finishing along its length
The good sheet metal base of hundreds of thousands of a thickness uniformity consistencies can then be obtained at the same time using accurate multi-wire saw equipment and technique
(note：Obtained base thickness direction is actually substantially flat with the long charge length direction of layered composite metal used before section
OK, and the thickness of piece base does not change when being machined to finished product composite metal in most cases).At certain
Under a little application scenarios, piece base after accurate cutting is even only just directly used in finished product composition metal by surface cleaning process of deoiling
Piece.
The preparation method S1 steps of composite metal disclosed in the utility model --- realize non-side composite construction
Technical principle prepared by layered composite metal is solid phase composite algorithm (continuous extrausion process, sheathed extrusion method, roll-bonding method, pre- bag
Cover and belong to this type with reference to hubbing, explosion composite method etc.) and liquid and solid bonding me thod is not used, and S3 steps are excellent
The accurate multi-wire saw means that are first considered as under cooling condition and using laser, plasma, (electric spark) wire cutting, second
Alkynes gas flame cuttiug technique, is for the life of cutting process for avoiding the recombination process for preparing dissimilar metal as far as possible and obtaining piece base
Destruction into heat combination interface dissimilar metal：According to the Phase Diagram of Materials between dissimilar metal and material kinetics and
Thermodynamics is understood, in higher temperature (heat input) and under the action of certain time, the combination interface of some dissimilar metals combination is very
Easily generation single or multiple lift intermetallic compound, and hard brittleness and low electric conductivity feature that these intermetallic compounds have are past
It is subject to heavy damage toward the combination degree and monolithic conductive heat-sinking capability caused between dissimilar metal, this is to the follow-up of composite metal
Processing forming (possibly carrying out pressing and bending) and application performance are all very unfavorable such as electric conductivity.
Since composite metal disclosed in the utility model is during follow-up transition connects dissimilar metal components, usually adopt
Identical or easy welding combination material is carried out with means such as Laser Welding, resistance spot welding, electron beam weldering, plasma weldering, arc welding, CMT welderings
Joining Technology between matter, these Joining Technologies also inevitably produce welding heat affected zone (even Laser Welding, electron beam weldering, etc. from
The high energy beam welding techniques such as son weldering).Composite metal disclosed in the utility model is also for heat affecting when avoiding welding
Area influences the (generation of the intermetallic compound near control interface of trying one's best to the Latent destruction of the compound interface dissimilar metal
And grow up), therefore each heterogeneous intermetallic combination interface is arranged on the composite metal as far as possible and is welded to connect with other materials
When caused heat affected area outside, this is also exactly the lamellar composite disclosed in the utility model being used for before accurate multi-wire saw
The key reason strictly limited is made residing for metal strip material appearance and size and combination interface with respect to (finished surface) position, i.e., most
Ensure mutually to spell eventually combining structure composite metal and other heat transfer Main ways when connecting sheet metal and being respectively welded and
Its approach deviates the faying face of the composite metal as far as possible, so that faying face nearby remains original material structure
Architectural feature.
Realize the near of (side) combination or connection structure is mutually spelled between dissimilar metal in short, the utility model is actually one kind
The advanced technology of preparing of net forming parts.Obviously, for the combination of layered composite metal, clad structure type, laminated construction
Type, the Material cladding of mosaic texture type is substantially reduced compared with the side complex technique difficulty between band and bond strength more stabilization can
Lean on, the utility model obtains the long blank basis of composition metal of non-side composite construction in the scheme using relatively low technical difficulty
On, the locus structural relation that Material cladding interface is dexterously realized with the technology mode of accurate multi-wire saw turns
Change, i.e., the locus structural relation from original combination interface perpendicular to long billot surface normal direction efficiently accurately converts
For (after cutting) piece base combination interface parallel to each composition sheet thicknesses direction mutually spelling (equivalent to dissimilar metal piece and piece
Between side combination) positional structure relation, and the essential shape ruler of the piece base very close finished product transition piece
Very little and application characteristic, along with mutually spell the composite metal of (side is multiple) structure due to more other as lamination is compound, it is multiple to inlay
Close, the isostructural sheet metal of covered composite yarn is more advantageous to realizing being reliably connected for dissimilar metal components, therefore the utility model institute public affairs
The scheme opened is set for connection structure between a variety of dissimilar metals of many industrial products (including electric power, automobile, battery, electronics etc.)
Undoubtedly there is very important promotion and application value for meter.
Brief description of the drawings
Fig. 1 is that the circular phase described in embodiment 1 spells composite metal outline drawing；
Fig. 2 is that the circular phase described in Fig. 1 spells composite metal profile；
Fig. 3 is covered composite yarn metal long billet precision multi-wire saw described in embodiment 1 into the schematic diagram of several piece bases；
Fig. 4 is to spell the non-aluminum metal part front view before composite metal is connected in embodiment 1 with circular phase；
Fig. 5 is the schematic top plan view of structure shown in Fig. 4；
Fig. 6 is to spell the aluminum metal part front view before composite metal is connected in embodiment 1 with circular phase；
Fig. 7 is structure top view shown in Fig. 6；
Fig. 8 be in embodiment 1 by respectively with annular sheet metal carry out laser welding after integral structure component schematic diagram；
Required copper aluminium is designed described in Fig. 9 embodiments 2 and mutually spells composite metal；
Mutually joined according to the obtained copper aluminium of the utility model in Figure 10 embodiments 2 and connect sheet metal structure composition.
Embodiment
Further illustrate with reference to embodiments.
Embodiment 1：
The circular phase of embodiment 1 spells composite metal 111 and sees Fig. 1 and Fig. 2, it is by outer shroud fine aluminium (A1060) sheet metal 11
Formed with fine copper (T2) sheet metal 12 of inner ring, aluminum metal piece 11 and copper sheet metal 12 pass through the enclosed type that contacts with each other
Surrounding place side face be combined with firm Physical Metallurgy bonding pattern, wherein the outside diameter of aluminum annular sheet metal is Ф 12mm, interior
Footpath is Ф 11mm, and has a through hole 13 among copper annular sheet metal, i.e. copper ring outside diameter is Ф 11mm, and inner ring through hole 13 is a diameter of
Ф9mm.Whole annular sheet metal and copper and aluminum metal piece thickness are 2mm.
Entirely the preparation process of circular phase spelling composite metal is：
The fine aluminium bar of S1, the fine copper bar that supplied materials is Ф 13 and Ф 9.5 coat continuously extruded, and wherein core is copper bar,
Cladding material is aluminium bar, and extrusion cladding is carried out using TLJ340 types continuous extruder.Its principle is：Blank aluminium bar is coated by extruding wheel
Groove enters, and by the continuous rotation of extruding wheel, which is continuously drawn into extruding race, which moulds in extruding race
Property deform and pass through squeezing passage enter cladding cavity be then filled with cavity, core material fine copper bar enters cladding mould by another feed inlet
It is for composite with covering material.The extrusion process parameters of the continuous covered composite yarn of aluminium copper-clad：300 DEG C of aluminium bar temperature, copper bar temperature 25
DEG C, 400 DEG C of extrusion die and cavity temperature；Extrude wheel speed 0.5r/ seconds；Extrude wheel diameter 340mm.Extrusion appearance and size is Ф
16 aluminium cladding copper bar material, wherein aluminium coating thickness is 2mm.
S2, the composite bar that S1 steps obtain is machined to appearance and size by 4 cold drawings is Ф 12- 0.03The aluminium of mm
Copper-clad pole (wherein aluminum layer thickness is 1.5mm), then carries out scale (length 300mm) cutting and aligning by bar.
S3, the accurate multi-wire saw of the progress that will stack up through the obtained more aluminium copper-clad pole of S2 steps, using the work
The process schematic that sequence obtains several composite metal bases 110 is shown in Fig. 3.Using certain type multi-wire saw of Chinese certain company production
The Ф 0.16mm steel wires 200 that machine, wherein line of cut use, the steel wire of high-speed motion is cut by what is be sprayed thereon when cutting workpiece
Cut coolant and be brought into the mortar being made of SiC and PFG polyethylene glycol, these mortar with good fluidity to workpiece are cut
Cut workspace has cooling heat dissipation characteristics well again.The equipment can disposably while accurately cut out 3000 within half an hour
The circular phase of multi-disc high quality spells composite metal base:The thickness and precision of each base are 2 ± 0.02mm, and piece base any surface finish
Without scuffing.
The processes such as S4, piece base are punched out, surface cleaning processing, obtain multiple center bores be Ф 9, outside diameter Ф
12- 0.03The circular phase of mm spells composite metal 111, as shown in Figure 1.
Fig. 4 to Fig. 7 is respectively to spell composite metal 111 by circular phase to need the (note of copper metal part 22 before being attached：
Wherein the cylinder diameter of copper metal part is Ф 9±0.01) and (note of aluminium alloy (material A3004) plate 31：Ф is provided with cover board
12+0.05Hole, in order to be assembled with the outer shroud of annular sheet metal 111) schematic diagram.Fig. 8 is shown to be spelled by circular phase
The endoporus copper side of composite metal 111 and the aluminum side face of outer shroud respectively with aluminium on the inside of the copper surface of copper piece 22 and the hole of aluminium sheet 31
Face carries out continuous laser welding and (uses 2.5kW CO2Laser welder) connection after 222 schematic diagram of integral structure component (note：Arrow is
Continuous laser beam direction, and copper/copper and the technological parameter of aluminium/aluminium laser welding have differences, wherein 131,122 are respectively
The weld seam that aluminium/aluminium alloy and copper/copper continuous laser welding are formed), i.e., circular phase spelling composite metal passes through homogeneity or easy wlding
The solder design mode that continuous laser between material is formed, realizes its solid and reliable transition connection function.Due to this implementation
Example prepares aluminium copper-clad composite material using continuous extrausion process, and employs the multi-wire saw method with cooling and carry out accurate cutting,
Along with any laser welding position (i.e. the annular sheet metal most outer shroud and endoporus) and its laser generation heat transfer focussing direction
Parallel to Copper-Aluminum compound interface and distance in 1.5mm or so, control and avoid well each procedure of processing and Laser Welding and take over
The generation of heat affected area in journey, compound interface is nearby without intermetallic compound generation (note at this time：Not in aluminium in the present embodiment
Copper-clad cladding bar post-processing process does not use diffusion heat treatments, actually possible because being heat-treated diffusion also for preventing as far as possible
Caused intermetallic compound generation), therefore the obtained circular phase of the embodiment is spelled between the aluminium and copper of composite metal
With reference to Physical Metallurgy secure bond degree is reached, also so that the overall structure after transition connection is conductive excellent with thermal diffusivity.Annular
Mutually spell composite metal in the strong bonded of copper and aluminium also cause material total tune deformability to give full play to, be not in by
Loosely punching press is caused to cause copper sheet and aluminium flake segregation phenomenon in combining.
Embodiment 2：
See Fig. 9, conductive connecting piece 300 is designed as：Thickness 1.2mm；(wherein C10200 fine copper 301 is a length of for 200mm for overall length
120mm, 1060 fine aluminium, 302 a length of 80mm, fine copper are 1.2mm with fine aluminium and mutually spell combination in the side being in contact)；Width
70mm.The design as using copper aluminum side face (rolling) composite strip again along band transverse stamping into sheet technical solution difficulty
Quite big, the prior art is difficult to obtain.And it can then obtain meeting that original is set completely using technical solution disclosed in the utility model
What meter 300 size of conductive connecting piece and the copper aluminium of application performance requirement mutually spelled connection structure is conductively connected sheet metal.Step is as follows：
S1, by raw material width be 150mm, C10200 copper strips and the width that thickness is 6mm are 150mm, thickness is 8mm's
A1060 aluminium strips progress laminated type continuous rolling is compound, can obtain 4.2mm (thickness) * 150mm's (width) by 70% rolling deformation rate
The first blank of Copper-Aluminum compound band, the thickness proportion of each constituent element layer of the composite band is copper (50%)/aluminium (50%).
The Copper-Aluminum compound band of S1 steps, is carried out diffusion annealing heat treatment (note by S2：Using continuous bright crawler-type annealing side
Formula, 550 DEG C of temperature, 1 m/min of annealing speed), rolling, cleaning, longitudinal direction cut, align it is smooth, obtain subsequent sheet base cutting before
Required Copper-Aluminum compound band, the thickness of strip are 3mm, width 70mm, and copper aluminium thickness proportion remains as 1：1, then by the band
Material transversely long billet of the cutting to length into some block lengths (500mm).It is observed that the compound interface of the long billet of Copper-Aluminum compound is
Reach Physical Metallurgy bonding (strong bonded) degree, the intermetallic compound of 1~2 micron thickness occurs near interface, actual
The upper intermetallic compound is formed during diffusion annealing.
S3, stack up the long billet of Copper-Aluminum compound through S2 steps obtained several scales length, along its length side
To cross section carry out multi-thread accurate cutting, accurate cutting cuts technique using the wet of multi-line cutting machine, i.e., cutting when be passed through cooling
Cutting fluid, while the accurately Copper-Aluminum compound sheet metal base of hundreds of high quality of cutting, the i.e. thickness of this time slice base are 1.2mm, width
Spend for 3mm (wherein 401 width of aluminium be 1.5mm, the width of copper 402 1.5mm), length 70mm.
S4, multiple bases carry out cleaning and go oil processing, that is, obtain can be used for the copper aluminium of transition connection mutually to spell composite metal
400。
As shown in Figure 10, copper aluminium mutually spell composite metal 400 aluminium 401 and copper 402 at this time can respectively with fixed dimension
Copper sheet 501, aluminium flake 502 carry out pairing phase welding and connect, and 501 size of copper sheet for matching welding is：1.2mm (thickness) * 108.5mm
(length) * 70mm (width), pairing welding 502 size of aluminium flake is 1.2mm (thickness) * 78.5mm (length) * 70mm (width).Adopted during pairing welding
With the CO of 1kW2Continuous laser machine, adjusts suitable laser weld parameters and fully meets aluminium/aluminium and copper/copper good welds respectively
The requirement of continuous weld.Since the width that copper aluminium mutually spells composite metal 400 is 3mm, and to be in the sheet metal wide for its faying face
Degree symmetrical shaft position and be roughly parallel to piece thickness direction.Detect and observe through metallographic, phase welding connects Laser Welding aluminium/aluminium weld seam
541 and the heat affected area of copper/brazed seam 542 be respectively less than 1.0mm in width, i.e. copper aluminium mutually spells composite metal and copper and aluminium
Will not the Cu and Al combination face in composite metal 400 be produced any bear by connecing caused heat affected area using laser phase welding
Face is rung, i.e., the intermetallic compound near the combination interface formed in S2 step process is not grown up.Therefore mutually spell
After the completion of welding obtained this be conductively connected chip size and application characteristic (including conductive, welding) etc. fully meet former design will
Ask.Since the joint performance in the conductive connecting piece is excellent, require to carry out punching press to continuing the conductive connecting piece always according to user
Bending and molding (bending position is apart from the copper side of connector about 10mm), test result show the pressing and bending process butt joint intensity and
Performance does not produce any negative effect.
Embodiment 3：
The material composition that the specific embodiment and final products-circular phase of embodiment 1 spell composite metal is complete with structure
It is complete consistent.
Different from embodiment 1, the present embodiment S1 steps are using pre-coated combination hubbing：That is the soft state aluminium strip of uncoiling
2.0mm (thickness) * 62mm (width) surround the fine copper bar of a diameter of Φ 20mm, pass through the on-line cleaning of clad welded unit, Duo Zuleng
Curve pattern and be gradually rolled into circular tube shaped, then with the CO configured on the unit2The longitudinal joint that continuous laser welding machine is formed pipe
Continuous welding, is provided with the drawing die of Φ 22mm so that the close coated copper bar of aluminum pipe, prevents air on unit after the completion of welding
Cause to aoxidize into copper bar and aluminum pipe gap；Then the aluminium copper-clad bar of Φ 22mm is carried out to 60% large plastometric set, form aluminium
The compound just blank of copper-clad.
And S2 steps and embodiment 1 are slightly different, the compound just blank of the present embodiment must be diffused before cold drawing
Annealing heat-treats process：Using 300 DEG C, insulation 1 it is small when bright bell-type annealing so that Cu and Al combination interface reaches Physical Metallurgy
The degree of bonding, while observe the intermetallic compound appearance for finding that copper aluminium near interface has 2 micron thickness of part.
S3 and S4 steps are identical with specific embodiment 1.
The finished product circular phase obtained by embodiment S1~S4 steps spells composite metal after tested, with specific implementation
The application effect and indifference of example 1：Although its compound interface nearby still has compound between part metals, due in multi-wire cutting
Cut, post laser welding process all takes continuation such as corresponding measure described in the utility model to avoid intermetallic compound
Advolution, therefore the characteristic such as the graded seal of the annular compound sheet metal, conduction, punch forming remains able to meet finally
Requirement.
Claims (8)
1. a kind of mutually spell combining structure composite metal, it is characterised in that：It includes at least two or more different metal materials
Layer, each heterogeneous metal material layer form the composite metal for mutually spelling combining structure, pass through physics between each heterogeneous metal material layer
Metallurgical bonding mode strong bonded on the side being in contact with each other, and show each heterogeneous sheet metal and spelled in the side of adjacent contact
Connect the architectural feature of formula combination.
2. phase according to claim 1 spells combining structure composite metal, it is characterised in that in the composite metal extremely
Include a kind of light metal material layer, the combination interface place between the light metal material layer and adjacent heterogeneous metal material layer less
The thickness of the intermetallic compound of formation is not more than 5 microns.
3. phase according to claim 2 spells combining structure composite metal, it is characterised in that the light metal material layer
For one kind in aluminium and aluminium alloy, magnesium and magnesium alloy, titanium or titanium alloy, lithium and lithium alloy layer.
4. combining structure composite metal is spelled according to any phases of claim 1-3, it is characterised in that：The composite metal
For one kind in clad structure type composite metal, laminated construction type composite metal or mosaic texture type composite metal.
5. combining structure composite metal is mutually spelled according to claim 4, it is characterised in that：The compound gold of clad structure type
The equivalent overall diameter or thickness for belonging to piece are not less than 1.6mm, and each heterogeneous metal carbonyl coat thickness is not less than 0.4mm.
6. combining structure composite metal is mutually spelled according to claim 4, it is characterised in that：The compound gold of laminated construction type
The gross thickness for belonging to piece is not less than 0.8mm, and the surface distance of each different metal materials combination interface to the composite metal is not small
In 0.4mm.
7. combining structure composite metal is mutually spelled according to claim 4, it is characterised in that：The compound gold of mosaic texture type
The gross thickness for belonging to piece is not less than 0.8mm, and each embedding material width is not less than 0.8mm, and the combination bottom surface of each embedding material and base material is to compound
The distance on sheet metal surface is not less than 0.4mm.
8. according to claim 7 mutually spell combining structure composite metal, it is characterised in that the composite metal with wherein
At least one homogenous metal material carries out being formed mutually to join after continuously welding connecing metal structure.
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