CN105562648A - Method for semi-solid formation and connection integration of titanium alloy and aluminum alloy - Google Patents
Method for semi-solid formation and connection integration of titanium alloy and aluminum alloy Download PDFInfo
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- CN105562648A CN105562648A CN201610131234.9A CN201610131234A CN105562648A CN 105562648 A CN105562648 A CN 105562648A CN 201610131234 A CN201610131234 A CN 201610131234A CN 105562648 A CN105562648 A CN 105562648A
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- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/007—Semi-solid pressure die casting
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Abstract
The invention discloses a method for semi-solid formation and connection integration of a titanium alloy and an aluminum alloy. The method comprises the following steps: a preconnected titanium alloy is prepared to a titanium alloy pipe with a certain size and shape; the titanium alloy pipe is put in a mold for preheating; an aluminum alloy is prepared to a semi-solid blank or semi-solid slurry with a liquid phase rate of 50-60%; the aluminum alloy semi-solid blank or semi-solid slurry is shifted into the titanium alloy pipe of the mold; and a convex mold quickly moves downwards, and is pressed to realize die-forging connection integral formation. The method realizes precise formation of the aluminum alloy by using excellent fluidity of the aluminum alloy in the semi-solid state, prevents formation of a high-thickness brittle compound layer, can form a stable interface through a reaction between a liquid phase in the aluminum alloy semi-solid blank and the titanium alloy, and is high in connecting reliability. In addition, the method is simple and feasible, needs no special equipment, and adopts a common hydropress to realize the formation and connection integration of the titanium alloy and the aluminum alloy.
Description
Technical field
The present invention relates to a kind of method of semi-solid-state shaping connecting integration, particularly relate to a kind of method for titanium alloy and aluminium alloy semi-solid shaping connecting integration, belong to material and connect and forming technique field.
Background technology
Material syndeton has the comprehensive premium properties of multiple material, is thus widely used in Aero-Space, space technology, nuclear industry, microelectronics, automobile, field of petrochemical industry.Because the physical property of pre-connection material and chemical property exist very big-difference, harsher to the requirement connected.
Semi-solid-state shaping comprises rheological molding and thixotropic forming.Obtained semisolid non-dendritic slurry is directly formed processing, is called rheological molding; And this slurry is first frozen into ingot casting, more as required cast metals is cut into a certain size, make it reheat carry out be processed into thixotropic forming to semi-solid temperature interval.Because between titanium aluminium, Solid-phase welding is comparatively difficult, there is the shortcomings such as efficiency is low, very flexible; And the melting welding of titanium aluminium exists the problems such as weld crack tendency is large, welding deformation is large, brittle metal compound is serious, the reliability of connection is not high, and the bond strength between connecting material and the uniformity of joint are difficult to meet the demands.
Summary of the invention
In order to solve the weak point existing for above-mentioned technology, the invention provides a kind of method for titanium alloy and aluminium alloy semi-solid shaping connecting integration.
In order to solve above technical problem, the technical solution used in the present invention is: a kind of method for titanium alloy and aluminium alloy semi-solid shaping connecting integration, and it is divided into following steps:
A, according to the geomery of part formed thereby and performance requirement, the titanium alloy of pre-connection is prepared into the titanium alloy tube of certain size and shape;
B, titanium alloy tube is put into mould carry out preheating together, the temperature of preheating is 300-350 DEG C;
C, aluminium alloy is prepared into the aluminum alloy blank of certain size and shape, is then adopted by aluminum alloy blank electromagnetic induction heater to be preheated to 600-630 DEG C, insulation 15-25 minute, aluminum alloy blank is converted into semi-solid blank that liquid fraction is 50-60%;
Or adopt metal molten stove by aluminum alloy melting, smelting temperature is 700-730 DEG C, cools after aluminum alloy melting, and applies electromagnetic agitation to it in aluminium alloy cooling procedure, aluminium alloy is converted to semi solid slurry that liquid fraction is 50-60%;
D, by preheating and in the aluminium alloy semi-solid state blank that be incubated or the titanium alloy tube being moved into by aluminium alloy semi-solid slurry in mould, guarantee aluminium alloy semi-solid state blank is adjacent with titanium alloy tube;
E, punch are descending rapidly and pressurize, and realize die forging connecting overall and are shaped; After die forging completes, punch is up, push rod is about to aluminium alloy and the good product of titanium alloy bi-material joint forming eject, and completes the process that whole Semi solid bonding is forming integrated.
The downward pressure of punch of the present invention is 180-200kN, and descending speed is 10mm/s, and the dwell time is 10-20s.Titanium alloy is any one in TA2, TA7, TB2, TC4 titanium alloy; Aluminium alloy is any one in 6063,6061,7075,2024 aluminium alloys.
Joint forming technology and semi-solid state forming technique combine by the present invention, and the good fluidity possessed when utilizing aluminium alloy to be in semisolid, realizes aluminium alloy Accurate Shaping; Aluminium alloy semi-solid state blank temperature is low relative to melting welding, thus avoids the formation of heavy thickness brittle compound layer, and therefore react by the liquid phase in aluminium alloy semi-solid state blank and titanium alloy and form stable interface, connection reliability is high.In addition, this method is simple need not special equipment, adopts common hydraulic press can realize titanium alloy and aluminium alloy shaping connecting integration.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1, Fig. 2 are the method for operating schematic diagram of the embodiment of the present invention one to embodiment four.
Fig. 3 is the method for operating schematic diagram of the embodiment of the present invention five to embodiment eight.
In figure: 1, punch; 2, mould; 4, titanium alloy tube; 5, product; 6, cushion block; 7, push rod; 31, aluminium alloy semi-solid state blank; 32, aluminium alloy semi-solid slurry.
Detailed description of the invention
As shown in FIG. 1 to 3, the invention provides a kind of method for titanium alloy and aluminium alloy semi-solid shaping connecting integration, be specifically divided into following steps:
A, according to the geomery of part formed thereby and performance requirement, the titanium alloy of pre-connection is prepared into the titanium alloy tube 4 of certain size and shape;
B, titanium alloy tube 4 is put into mould 2 carry out preheating together, the temperature of preheating is 300-350 DEG C;
C, aluminium alloy is prepared into the aluminum alloy blank of certain size and shape, then electromagnetic induction heater is adopted by aluminum alloy blank to be preheated to 600-630 DEG C, insulation 15-25 minute, aluminum alloy blank is converted into aluminium alloy semi-solid state blank 31 that liquid fraction is 50-60%;
Or adopt metal molten stove by aluminum alloy melting, smelting temperature is 700-730 DEG C, cool after aluminum alloy melting, and in aluminium alloy cooling procedure, electromagnetic agitation is applied to it, aluminium alloy is converted to aluminium alloy semi-solid slurry 32 that liquid fraction is 50-60%;
D, by preheating and in the aluminium alloy semi-solid state blank 31 that has been incubated or the titanium alloy tube 4 aluminium alloy semi-solid slurry 32 being moved in mould 2; Described aluminium alloy semi-solid state blank 31 is adjacent with titanium alloy tube 4;
E, punch 1 is descending rapidly and pressurize, and realizes die forging connecting overall and is shaped; After die forging completes, punch 1 is up, push rod 7 is about to aluminium alloy and the good product 5 of titanium alloy bi-material joint forming eject, and completes the process that whole Semi solid bonding is forming integrated.
The downward pressure of above-mentioned steps d convex mould 1 is 180-200kN, and descending speed is 10mm/s, and the dwell time is 10-20s.
The present invention proposes titanium alloy first and aluminium alloy shaping connecting integration is imagined, the good fluidity namely utilizing aluminium alloy to have under semisolid and reactivity, and while guarantee aluminium alloy Accurate Shaping, to realize between aluminium alloy with titanium alloy reliable is connected.The present invention is applicable to conventional most of titanium alloy and aluminium alloy, be particularly useful for TA2, TA7, TB2, TC4 titanium alloy and 6063,6061,7075,2024 aluminium alloys.In conjunction with specific embodiments the present invention is further elaborated with regard to the titanium alloy of this several model and aluminium alloy below, but the present invention is not limited to titanium alloy, the aluminium alloy model of cited embodiment.
Embodiment one: TA2 titanium alloy and 6063 aluminium alloys
A, for the ease of the aluminium alloy semi-solid state blank after preheating is put into titanium alloy tube, consider thermal coefficient of expansion be 2.3 × 10
-5factor, TA2 titanium alloy pipe is processed into the TA2 titanium alloy tube being of a size of φ 50mm × 5mm × h40mm; 6063 aluminium alloy bars are processed into 6063 aluminum alloy blanks being of a size of φ 39mm × h50.6mm;
B, TA2 titanium alloy tube is put into mould carry out preheating together, preheat temperature is 300 DEG C;
6063 aluminum alloy blanks are preheated to 620 DEG C by c, employing electromagnetic induction heater, and be incubated 20 minutes, 6063 aluminum alloy blanks are converted into the semi-solid blank that liquid fraction is 60%;
D, by preheating and 6063 aluminium alloy semi-solid state blanks 3 that have been incubated move in the TA2 titanium alloy tube in mould, ensure that 6063 aluminium alloy semi-solid state blanks are adjacent with TA2 titanium alloy tube;
The descending rapidly and 196KN that pressurizes of e, punch, punch downstream rate is 10mm/s, and the dwell time is 10s, makes 6063 aluminium alloy semi-solid state blanks in semi-solid temperature district complete die forging joint forming; Then punch 1 is up, push rod 7 is about to eject together with the product 5 that is made up of 6063 aluminium alloys and TA2 titanium alloy two sections of material, takes out product 5.
Embodiment two: TA7 titanium alloy and 7075 aluminium alloys
A, TA7 titanium alloy pipe is processed into the TA7 titanium alloy tube being of a size of φ 60mm × 5mm × h45mm.
B, TA7 titanium alloy tube is put into mould carry out preheating together, preheat temperature is 320 DEG C;
C, 7075 aluminium alloy bars are processed into the blank being of a size of φ 49mm × h62mm, adopt electromagnetic induction heater that 7075 aluminum alloy blanks are preheated to 620 DEG C, be incubated 18 minutes, 7075 aluminum alloy blanks are converted into the semi-solid blank that liquid fraction is 56%;
D, 7075 aluminium alloy semi-solid state blanks preheating be also incubated move in the TA7 titanium alloy tube in moulds, ensure that 7075 aluminium alloy semi-solid state blanks are adjacent with TA7 titanium alloy tube;
The descending rapidly and 190KN that pressurizes of e, punch, punch downstream rate is 10mm/s, and the dwell time is 15s, makes 7075 aluminium alloy semi-solid state blanks in semi-solid temperature district complete die forging joint forming; Then, punch 1 is up, push rod 7 is about to eject together with the product 5 that is made up of 7075 aluminium alloys and TA7 titanium alloy two sections of material, takes out product 5.
Embodiment three: TB2 titanium alloy and 2024 aluminium alloys
A, TB2 titanium alloy pipe is processed into the TB2 titanium alloy tube being of a size of φ 40mm × 5mm × h35mm;
B, TB2 titanium alloy tube is put into mould carry out preheating together, preheat temperature is 350 DEG C;
C, 2024 aluminium alloy bars are processed into the blank being of a size of φ 29mm × h50mm, adopt electromagnetic induction heater that 2024 aluminum alloy blanks are preheated to 630 DEG C, be incubated 15 minutes, 2024 aluminum alloy blanks are converted into the semi-solid blank that liquid fraction is 50%;
D, 2024 aluminium alloy semi-solid state blanks preheating be also incubated move in the TB2 titanium alloy tube in moulds, ensure that 2024 aluminium alloy semi-solid state blanks are adjacent with TB2 titanium alloy tube;
The descending rapidly and 180KN that pressurizes of e, punch, punch downstream rate is 10mm/s, and the dwell time is 20s, makes 2024 aluminium alloy semi-solid state blanks in semi-solid temperature district complete die forging joint forming; Then, punch is up, push rod is about to eject together with the product that is made up of 2024 aluminium alloys and TB2 titanium alloy two sections of material, takes out product.
Embodiment four: TC4 titanium alloy and 6061 aluminium alloys
A, TC4 titanium alloy pipe is processed into the TC4 titanium alloy tube being of a size of φ 55mm × 5mm × h45mm;
B, TC4 titanium alloy tube is put into mould carry out preheating together, preheat temperature is 300 DEG C;
C, 6061 aluminium alloy bars are processed into the blank being of a size of φ 44mm × h60mm, adopt electromagnetic induction heater that 6061 aluminum alloy blanks are preheated to 600 DEG C, be incubated 25 minutes, 6061 aluminum alloy blanks are converted into the semi-solid blank that liquid fraction is 55%;
D, by preheating and 6061 aluminium alloy semi-solid state blanks 3 that have been incubated move in the TC4 titanium alloy tube in mould, ensure that 6061 aluminium alloy semi-solid state blanks are adjacent with TC4 titanium alloy tube;
The descending rapidly and 200KN that pressurizes of e, punch, punch downstream rate is 10mm/s, and the dwell time is 18s, makes the aluminium alloy semi-solid state blank in semi-solid temperature district complete die forging joint forming; Then, punch 1 is up, push rod 7 is about to eject together with the product 5 that is made up of 6061 aluminium alloys and TC4 titanium alloy two sections of material, takes out product 5.
Embodiment five: TA2 titanium alloy and 6061 aluminium alloys
A, TA2 titanium alloy pipe is processed into the TA2 titanium alloy tube being of a size of φ 45mm × 5mm × h50mm;
B, TA2 titanium alloy tube is put into mould carry out preheating together, the temperature of preheating is 350 DEG C;
C, employing metal molten stove are by 6061 aluminum alloy meltings, smelting temperature is 730 DEG C, cool after 6061 aluminum alloy meltings, and apply electromagnetic agitation to it in 6061 aluminium alloy cooling procedures, 6061 aluminium alloys are converted to the semi solid slurry that liquid fraction is 50%;
D, move into 6061 aluminium alloy semi-solid slurries in moulds TA2 titanium alloy tube in;
E, punch are descending rapidly and carry out pressurization 190KN, and punch downstream rate is 10mm/s, and the dwell time is 10s, makes 6061 aluminium alloy semi-solid slurries in semi-solid temperature district complete die forging joint forming; After die forging completes, punch is up, push rod is about to 6061 aluminium alloys and the good product of TA2 titanium alloy bi-material joint forming eject, and completes the process that whole Semi solid bonding is forming integrated.
Embodiment six: TC4 titanium alloy and 7075 aluminium alloys
A, TC4 titanium alloy pipe is processed into the TC4 titanium alloy tube being of a size of φ 47mm × 5mm × h45mm;
B, TC4 titanium alloy tube is put into mould carry out preheating together, the temperature of preheating is 330 DEG C;
C, employing metal molten stove are by 7075 aluminum alloy meltings, smelting temperature is 720 DEG C, cool after 7075 aluminum alloy meltings, and apply electromagnetic agitation to it in 7075 aluminium alloy cooling procedures, 7075 aluminium alloys are converted to the semi solid slurry that liquid fraction is 58%;
D, move into 7075 aluminium alloy semi-solid slurries in moulds TC4 titanium alloy tube in;
E, punch are descending rapidly and carry out pressurization 180KN, and punch downstream rate is 10mm/s, and the dwell time is 16s, makes 7075 aluminium alloy semi-solid slurries in semi-solid temperature district complete die forging joint forming; After die forging completes, punch is up, push rod is about to 7075 aluminium alloys and the good product of TC4 titanium alloy bi-material joint forming eject, and completes the process that whole Semi solid bonding is forming integrated.
Embodiment seven: TA7 titanium alloy and 2024 aluminium alloys
A, TA7 titanium alloy pipe is processed into the TA7 titanium alloy tube being of a size of φ 65mm × 5mm × h55mm;
B, TA7 titanium alloy tube is put into mould carry out preheating together, the temperature of preheating is 300 DEG C;
C, employing metal molten stove are by 2024 aluminum alloy meltings, smelting temperature is 710 DEG C, cool after 2024 aluminum alloy meltings, and apply electromagnetic agitation to it in 2024 aluminium alloy cooling procedures, 2024 aluminium alloys are converted to the semi solid slurry that liquid fraction is 52%;
D, move into 2024 aluminium alloy semi-solid slurries in moulds TA7 titanium alloy tube in;
E, punch are descending rapidly and carry out pressurization 196KN, and punch downstream rate is 10mm/s, and the dwell time is 10s, makes 2024 aluminium alloy semi-solid slurries in semi-solid temperature district complete die forging joint forming; After die forging completes, punch is up, push rod is about to 2024 aluminium alloys and the good product of TA7 titanium alloy bi-material joint forming eject, and completes the process that whole Semi solid bonding is forming integrated.
Embodiment eight: TB2 titanium alloy and 6063 aluminium alloys
A, TB2 titanium alloy pipe is processed into the TB2 titanium alloy tube being of a size of φ 60mm × 4mm × h45mm;
B, TB2 titanium alloy tube is put into mould carry out preheating together, the temperature of preheating is 310 DEG C;
C, employing metal molten stove are by 6063 aluminum alloy meltings, smelting temperature is 700 DEG C, cool after 6063 aluminum alloy meltings, and apply electromagnetic agitation to it in 6063 aluminium alloy cooling procedures, 6063 aluminium alloys are converted to the semi solid slurry that liquid fraction is 60%;
D, move into 6063 aluminium alloy semi-solid slurries in moulds TB2 titanium alloy tube in;
E, punch are descending rapidly and carry out pressurization 200KN, and punch downstream rate is 10mm/s, and the dwell time is 20s, makes 6063 aluminium alloy semi-solid slurries in semi-solid temperature district complete die forging joint forming; After die forging completes, punch is up, push rod is about to 6063 aluminium alloys and the good product of TB2 titanium alloy bi-material joint forming eject, and completes the process that whole Semi solid bonding is forming integrated.
Above-mentioned embodiment is not limitation of the present invention; the present invention is also not limited in above-mentioned citing; the change that those skilled in the art make within the scope of technical scheme of the present invention, remodeling, interpolation or replacement, also all belong to protection scope of the present invention.
Claims (3)
1., for a method for titanium alloy and aluminium alloy semi-solid shaping connecting integration, it is characterized in that, it is divided into following steps:
A, according to the geomery of part formed thereby and performance requirement, the titanium alloy of pre-connection is prepared into the titanium alloy tube (4) of certain size and shape;
B, titanium alloy tube (4) is put into mould (2) carry out preheating together, the temperature of preheating is 300-350 DEG C;
C, aluminium alloy is prepared into the aluminum alloy blank of certain size and shape, then electromagnetic induction heater is adopted by aluminum alloy blank to be preheated to 600-630 DEG C, insulation 15-25 minute, aluminum alloy blank is converted into aluminium alloy semi-solid state blank (31) that liquid fraction is 50-60%;
Or adopt metal molten stove by aluminum alloy melting, smelting temperature is 700-730 DEG C, cool after aluminum alloy melting, and in aluminium alloy cooling procedure, electromagnetic agitation is applied to it, aluminium alloy is converted to aluminium alloy semi-solid slurry (32) that liquid fraction is 50-60%;
D, by preheating and in the aluminium alloy semi-solid state blank (31) that has been incubated or the titanium alloy tube (4) aluminium alloy semi-solid slurry (32) being moved in mould (2); Described aluminium alloy semi-solid state blank (31) is adjacent with titanium alloy tube (4);
E, punch (1) is descending rapidly and pressurize, and realizes die forging connecting overall and is shaped; After die forging completes, punch (1) is up, push rod (7) is about to aluminium alloy and the good product (5) of titanium alloy bi-material joint forming eject, and completes the process that whole Semi solid bonding is forming integrated.
2. the method for titanium alloy and aluminium alloy semi-solid shaping connecting integration according to claim 1 and 2, it is characterized in that: the downward pressure of described punch (1) is 180-200kN, descending speed is 10mm/s, and the dwell time is 10-20s.
3. the method for titanium alloy and aluminium alloy semi-solid shaping connecting integration according to claim 3, is characterized in that: described titanium alloy is any one in TA2, TA7, TB2, TC4 titanium alloy; Described aluminium alloy is any one in 6063,6061,7075,2024 aluminium alloys.
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| CN108746565A (en) * | 2018-06-05 | 2018-11-06 | 宁波海威汽车零件股份有限公司 | Semi-solid slurry preparation device and the preparation method for utilizing the device |
| CN109732054A (en) * | 2019-02-02 | 2019-05-10 | 东营源纳合金科技有限公司 | It is a kind of special type aluminium alloy semi-solid material preparation and automatic forming device |
| CN109763006A (en) * | 2019-02-01 | 2019-05-17 | 哈尔滨工业大学（威海） | A kind of magnalium composite component forming connecting integration method |
| CN109807272A (en) * | 2019-02-18 | 2019-05-28 | 哈尔滨工业大学（威海） | A kind of soft core duplex forging forming method of aluminum steel bimetal part thixotroping |
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| CN109807272A (en) * | 2019-02-18 | 2019-05-28 | 哈尔滨工业大学（威海） | A kind of soft core duplex forging forming method of aluminum steel bimetal part thixotroping |
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