CN106735844A - For the wrapping structure and spin friction soldering method of dissimilar metal spin friction weldering - Google Patents
For the wrapping structure and spin friction soldering method of dissimilar metal spin friction weldering Download PDFInfo
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- CN106735844A CN106735844A CN201611030626.2A CN201611030626A CN106735844A CN 106735844 A CN106735844 A CN 106735844A CN 201611030626 A CN201611030626 A CN 201611030626A CN 106735844 A CN106735844 A CN 106735844A
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- wrapping structure
- welded
- dissimilar metal
- spin friction
- steel
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Classifications
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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
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir 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
- B23K20/22—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
- B23K20/227—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 with ferrous layer
-
- 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
- B23K20/26—Auxiliary equipment
Abstract
The invention discloses a kind of wrapping structure and spin friction soldering method for dissimilar metal spin friction weldering, the cylindrical sleeves that described wrapping structure is processed for cylinder steel, the cylindrical sleeves inwall is machined with internal thread；When spin friction is welded, the external screw thread that dissimilar metal bar end has is threadedly coupled with the internal thread of wrapping structure, the steel matter end contact spin friction of Steel Bar end face and wrapping structure.Wrapping structure and spin friction soldering method for dissimilar metal spin friction weldering of the present invention, significantly reduce because the huge caused plastic deformation of dissimilar metal high-temperature behavior difference is uneven, it is mingled with so as to reduce weld metal zone residual stress and thoroughly remove the oxide of steel surface, wrapping structure can also play a part of mould constraint metal, and then improve welding quality.Meanwhile, also significantly reduce requirement of the welding process to capacity of equipment.
Description
Technical field
The present invention relates to a kind of wrapping structure for dissimilar metals friction weld and the titanium or titanium using the wrapping structure
The spin friction soldering method of alloy and steel.
Background technology
At present, titanium or titanium alloy have specific strength high, excellent corrosion resistance and good processability, extensive use
In fields such as aerospace, medical treatment, metallurgy, it is referred to as contemporary new the 3rd metal for emerging.But limitation titanium alloy application is primary
Problem is expensive.And steel, the relative low price such as including carbon steel, steel alloy, stainless steel, it is to apply in industrial circle
One of most commonly used structural material.Titanium or titanium alloy and the bimetallic composite component of steel, can give full play to the two in performance
Above with mutual supplement with each other's advantages economically, had broad application prospects in Aero-Space, shipbuilding and nuclear industry field.
Friction welding (FW) is led as a kind of low temperature, efficient solid phase connecting method in new material connection, high-performance equipment manufacturing etc.
Domain receives great attention, is particularly well-suited to structure, the dissimilar materials of function integration assembles the connection of high-strength joint.But due to
Titanium steel composite component belongs to the connection of typical dissimilar metal, because of the two physical parameter such as fusing point (titanium：1660 DEG C, iron：1535
DEG C), linear expansion coefficient (titanium：8.9 × 10-6 DEG C -1, iron：11.8 × 10-6 DEG C -1), and high temperature lower yield strength is (at 700 DEG C
Titanium：89MPa, iron：206MPa) differ larger, overlap is only produced in titanium alloy side in causing friction welding (FW), and steel side interface is several
Without deformation, this causes the oxide of steel surface in one side joint and to be mingled with and cannot thoroughly extrude, another aspect joint into
The shape interface severe bends larger postwelding residual stress of generation, the collective effect of these factors causes the welding quality of the two joint difficult
To ensure.In addition, being assembled for titanium steel, generally require using the welding of strong specification technique, the Capability Requirement to equipment is higher.
Document " Effect of friction time on mechanical and metallurgical
properties of continuous drive friction welded Ti6Al4V/SUS321joints,P Li,JL
Li,M Salman,L Li,JT Xiong,FS Zhang,Material&design,2014,56:649-656 " is open to know clearly one
The method for planting Ti6Al4V titanium alloys and the direct spin friction weldering of SUS321 stainless steels, the most of generation of overlap that joint is formed exists
Ti6Al4V titanium alloys side, is respectively the typical case's macroscopic view appearance and contact cross-section pattern that assemble joint shown in Fig. 1 and Fig. 2, its
Serious assymmetrical deformation and curved interface feature is difficult to ensure that the integrality of whole joint mechanical property.Strength of joint highest
When, the friction pressure and upsetting force that welding process is used are respectively 184MPa and 330MPa.
Monograph《Press welding method and equipment, Zhao Xihua, Feng Jicai, China Machine Press, 2005》Point out, it is high for such
The heterogeneous solution for assembling cogging problem that warm nature can differ greatly, uses the mould of design specialized for constraining mostly at present
Soft metal, in friction heating process, with time lengthening is frictionally heated, connector temperature is raised, and mould is constrained and causes friction texturizing
Layer promotes steel to be deformed to the side shifting of steel one.The device needs the special fixture of customization, frock for various sizes of workpiece
It is complicated and relatively costly, it is unfavorable for commercial Application.
The patent of invention of Application No. CN201110330877.3 discloses a kind of friction welding (FW) preheating mechanism, by the mechanism
The overall heating at workpiece position to be welded is realized, so that reduce resistance of deformation to improve joint distortion degree, but the preheating mechanism
Special design is needed, and has particular/special requirement with manufacture and installation dimension to equipment, cause its versatility not strong, it is difficult to extensively
The diversity requirements that popularization and reply welding are assembled.
Document " Investigations on the mechanical properties and microstructure
of dissimilar cp-titanium and AISI 316L austenitic stainless steel continuous
friction welds,SAA Akbarimousavi,M GohariKia,Materials&Design,32(5):3066-
3075 " friction welding method of a kind of pure titanium and AISI 316L stainless steels is disclosed, the method is by AISI 316L stainless steels
Rubbed with pure titanium again after preheating, realized the purpose that both sides metal simultaneously participates in plastic deformation, as a result shown, two ends are same
Shi Fasheng plastic deformations can be conducive to the raising of strength of joint.But there is preheating problem of oxidation, must be cleared up before welding every time
The oxide on high-temperature metal surface, operation is more difficult.During strength of joint highest, friction pressure and upset that welding process is used
Pressure is respectively 196MPa and 349MPa.
Document " Characterizations of 21-4N to 4Cr9Si2stainless steel dissimilar
joint bonded by electric-resistance-heat-aided friction welding.Materials&
Design,2009,30(10):4230-4235 " and document " A new current hybrid inertia friction
welding for nickel-based superalloy K418-alloy steel 42CrMo dissimilar
metals.International Journal of Advanced Manufacturing Technology,2014,70(9):
1673-1681 " then applies electric current to workpiece to be welded, and interface metal resistance of deformation is reduced using contact resistance heat to realize big modeling
Property distortion weld.And realize that the auxiliary equipment that these methods are used increased experimental cost and complexity, security also turns into
Need the factor for considering.
It can be seen that, in order to control a large amount of deformations and loss of titanium or titanium alloy in welding process, while reducing to friction welding (FW)
The requirement of capacity of equipment, is badly in need of exploitation new process a kind of with low cost and practical to improve titanium steel joint distortion condition,
The metal of interface both sides is enabled while there is sufficiently plastic deformation, the welding quality for ensureing joint has very heavy
The meaning wanted.
The content of the invention
According to technical problem set forth above, and provide a kind of wrapping structure for dissimilar metal spin friction weldering and rotation
Turn friction welding method, in being used to solve existing dissimilar metal spin friction weldering, when being welded with titanium steel direct friction, both sides metal
Fusing point and mechanical behavior under high temperature difference are huge, caused by joint area be only that titanium side occurs severe plastic deformation, formed big
Amount overlap, and steel side mother metal does not deform substantially so that being mingled with for steel surface oxide cannot be removed thoroughly, so as to cause to connect
Head welding quality deficiency not high, equipment requirement shortcoming high.The technological means that the present invention is used is as follows：
A kind of wrapping structure for dissimilar metal spin friction weldering, described wrapping structure is processed for cylinder steel
Cylindrical sleeves, the cylindrical sleeves inwall is machined with internal thread；When spin friction is welded, it is outer that dissimilar metal bar end has
Screw thread is threadedly coupled with the internal thread of wrapping structure, the steel matter end contact spin friction of Steel Bar end face and wrapping structure.
It is titanium or titanium alloy rod bar as preferably described dissimilar metal bar.
It is λ, 1mm≤λ≤3mm as the end surface thickness of the preferred wrapping structure；The length of the wrapping structure is L,
5mm≤L≤30mm。
It is D, a diameter of φ of bar to be welded, φ+2mm≤D as the external diameter of the preferred wrapping structure.
Used as a height of α of tooth of the preferred wrapping structure internal thread, 0.5mm≤α≤2.5mm, pitch is β, 0.8mm≤α
≤2.5mm；The wrapping structure bore depth is γ, 4mm≤α≤29mm.
A kind of spin friction soldering method, comprises the following steps：
S1, welding preparation, according to Steel Bar to be welded and the size of dissimilar metal bar to be welded, processing the claims 1-
Wrapping structure described in 5 any one claims, and it is machined with same jacket knot in dissimilar metal bar end outer wall to be welded
The external thread structure of structure screw-internal thread fit；
S2, assembling structure joint, the wrapping structure that will have been cleared up, the mode of being connected through a screw thread are assemblied in dissimilar metal to be welded
Bar treats welding end, and welding structure is treated in formation；
S3, welding are carried out, and bar to be welded is installed on friction-welding machine, spin friction welding, in worn out moment upset
Brake, finally obtains the composite-joint that dissimilar metal fully deforms simultaneously with steel both sides.
It is titanium or titanium alloy rod bar as preferably described dissimilar metal bar, wrapping structure steel matter is with Steel Bar to be welded
Material it is identical.
It is 40~80MPa according to friction pressure in as preferred S3, upsetting force is that the technological parameter of 80~160MPa enters
Row welding.
Used as the 2mm -5mm of the external diameter more than Steel Bar diameter to be welded of preferably described wrapping structure, internal diameter is equal to be welded
Steel Bar diameter；The external thread section length of the dissimilar metal bar end to be welded is more than wrapping structure bore depth.
The surface to be welded of Steel Bar to be welded, dissimilar metal bar to be welded and wrapping structure is machined as in preferred S1
To roughness Ra≤3.2 μm, and go to degrease and impurity using the cleaning of acetone ultrasonic wave.
Compared with prior art, the wrapping structure and rotary friction for dissimilar metal spin friction weldering of the present invention
Soldering method is wiped, wrapping structure is the cylindrical sleeves that cylinder steel are processed, and the cylindrical sleeves inwall is machined with internal thread；Rotation
When turning friction welding (FW), the external screw thread that dissimilar metal bar end has is threadedly coupled with the internal thread of wrapping structure, Steel Bar end face
With the steel matter end contact spin friction of wrapping structure, dissimilar metal is finally obtained compound with what steel both sides fully deformed simultaneously
Joint, dissimilar metal bar is titanium or titanium alloy rod bar, and during by original welding, the direct friction of titanium or titanium alloy rod bar and steel becomes
It is the friction of steel and steel, the heat that frictional interface is produced is enough to make rod iron weld metal zone produce fully plastic deformation, in continuous frictional
After the wrapping structure end face of the lower steel matter of effect is worn through, the high-temp plastic layer of steel and rubbing for titanium alloy are finally developed on interface
Wipe, and both further form joint in phase mutual friction elimination interface in the presence of upset force.This process is significantly reduced because different
The huge caused plastic deformation of metallic high temperature performance difference is planted uneven, so as to reduce weld metal zone residual stress and thoroughly remove
The oxide of steel surface is mingled with, and wrapping structure can also play a part of mould constraint metal, and then improve welding quality.
Wrapping structure and spin friction soldering method for dissimilar metal spin friction weldering of the present invention, it is to avoid existing
There is the preparation to auxiliary thermal source and special intermediate layer in technology, it is often more important that be also changed into the welding procedure of strong specification originally
The common process specification of steel body connection so that pressure value needed for welding process reduces more than 1 times, so significantly reducing
Requirement to capacity of equipment so that while welding cost is greatly reduced, it is ensured that the performance of joint, realize various titaniums or
The strong ties high of titanium alloy and steel.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is titanium alloy and stainless joint macroscopic view appearing diagram in the prior art.
Fig. 2 is titanium alloy and stainless joint Cross Section Morphology figure in the prior art.
Fig. 3 is the schematic diagram of structural joint of the present invention.
Fig. 4 is the sectional view that dissimilar metal of the present invention is cased with wrapping structure.
In figure, 1, Steel Bar, 2, dissimilar metal bar, 3, wrapping structure；
D is the external diameter of wrapping structure, and φ is diameter of rod to be welded, and λ is the end surface thickness of wrapping structure, and L is wrapping structure
Length.
Specific embodiment
As shown in Figure 3 and Figure 4, a kind of wrapping structure for dissimilar metal spin friction weldering, described wrapping structure 3 is
The cylindrical sleeves that cylinder steel are processed, the cylindrical sleeves inwall is machined with internal thread；When spin friction is welded, dissimilar metal
The external screw thread that the end of bar 2 has is threadedly coupled with the internal thread of wrapping structure 3, the steel of the end face of Steel Bar 1 and wrapping structure 3
Matter end contact spin friction.
Described dissimilar metal bar 2 is titanium or titanium alloy rod bar.The end surface thickness of the wrapping structure 3 is λ, 1mm≤λ
≤3mm；The length of the wrapping structure 3 is L, 5mm≤L≤30mm.The length L of wrapping structure 3 is preferably 10mm.The jacket
The external diameter of structure 3 is D, a diameter of φ of bar to be welded, φ+2mm≤D.Jacket internal diameter and diameter of rod to be welded are equivalent.
The a height of α of tooth of the internal thread of the wrapping structure 3,0.5mm≤α≤2.5mm, pitch is β, 0.8mm≤α≤2.5mm；
The bore depth of the wrapping structure 3 be γ, 4mm≤γ≤29mm, with ensure wrapping structure can securely clamping in Steel Bar
Side, and wrapping structure does not rupture in ensureing welding process.
As shown in Figure 3 and Figure 4, a kind of spin friction soldering method, comprises the following steps：
S1, welding preparation, according to Steel Bar to be welded and the size of dissimilar metal bar to be welded, process jacket described above
Structure 3, and it is machined with the external thread structure of the screw-internal thread fit of same wrapping structure 3 in the end outer wall of dissimilar metal bar to be welded 2.
Described dissimilar metal bar 2 be titanium or titanium alloy rod bar, the steel matter of wrapping structure 3 with Steel Bar to be welded 1 material
Matter is identical., more than the 2mm -5mm of the diameter of Steel Bar to be welded 1, internal diameter is equal to Steel Bar to be welded 1 for the external diameter of described wrapping structure 3
Diameter.The external thread section length of the end of dissimilar metal bar 2 to be welded is more than the bore depth of wrapping structure 3, used as preferred institute
State the big 0.5mm of bore depth size of external screw thread Length Ratio wrapping structure 3 of the end of dissimilar metal bar 2 to be welded.
The surface to be welded of Steel Bar to be welded, dissimilar metal bar 2 to be welded and wrapping structure 3 is machined to coarse in S1
Degree Ra≤3.2 μm, and go to degrease and impurity using the cleaning of acetone ultrasonic wave.
S2, assembling structure joint, the wrapping structure 3 that will have been cleared up, the mode of being connected through a screw thread are assemblied in xenogenesis gold to be welded
Category bar 2 treats welding end, and welding structure is treated in formation
S3, welding are carried out, and bar to be welded is installed on friction-welding machine, in S3, correspondence are welded according to conventional spin friction
Steel 2~6mm of axial length reduction, friction pressure is 40~80MPa, and upsetting force is that the technological parameter of 80~160MPa is welded
Connect, be specifically dependent upon steel construction material and worn out thickness is treated in jacket front end.
Spin friction is welded, and is braked in worn out moment upset, is finally obtained dissimilar metal and is fully become simultaneously with steel both sides
The composite-joint of shape.
Wrapping structure and spin friction soldering method for dissimilar metal spin friction weldering of the present invention, it is resulting
Joint steel side also fully deforms and is extruded into overlap, and tensile strength reaches more than the 85% of weak side strength of parent, can
Meet the military service performance requirement of most titanium steel composite components.
Embodiment 1, a kind of pure titaniums of TA2 and 45# steel spin friction welding methods, its detailed process are comprised the following steps：
Step 1, prepares 45# ladle nested structures, and TA2 titaniums rod side to be welded helicitic texture；Selection is with diameter greater than to be welded
The 45# Steel Bars of rod iron diameter 2mm, are processed into length for 10mm, and dimension of inner screw thread is tooth 0.5mm high, pitch 1mm, interior
Footpath is equal to diameter of rod to be welded, and depth is the wrapping structure of 9mm.
And each surface to be welded is machined to roughness Ra≤3.2 μm, then using the cleaning removal of acetone ultrasonic wave
Greasy dirt and impurity, obtain wrapping structure；The helicitic texture with wrapping structure tight fit, screw thread are processed into titanium alloy one end to be welded
Total length is 9.5mm.
Step 2, assembling structure joint；The 45# steel capsule Standards that will have been cleared up are connected through a screw thread mode and are installed on
The pure titaniums of TA2 treat welding end, and welding structure is treated in formation；
Step 3, welding；Bar to be welded is installed on friction-welding machine and welds 45# steel shafts to contracting according to conventional spin friction
Loss of quantity 2mm, friction pressure is 50MPa, and upsetting force is welded for the technological parameter of 100MPa, stopped in worn out moment upset
Car, finally obtains both sides metal and the fully pure titaniums of TA2 of plastic deformation and 45# steel composite-joints occurs simultaneously.
After tested, the tensile strength of gained joint is 410MPa, has been reached by weldering TA2 industrially pure titanium tensile strength
The 93.2% of (440MPa).
The spin friction welding method of embodiment 2, a kind of TC4 titanium alloys and 1Cr18Ni9Ti stainless steels, its detailed process
Comprise the following steps：
Step 1, prepares 1Cr18Ni9Ti stainless steel wrapping structures, and TC4 titanium alloy bars side helicitic texture to be welded；Choosing
The 1Cr18Ni9Ti stainless steel barses with diameter greater than rod iron diameter 4mm to be welded are selected, length is processed into for 12mm, internal thread chi
Very little is tooth 1mm high, and pitch 1mm, internal diameter is equal to diameter of rod to be welded, and depth is the wrapping structure of 10mm.
And each surface to be welded is machined to roughness Ra≤3.2 μm, then using the cleaning removal of acetone ultrasonic wave
Greasy dirt and impurity, obtain wrapping structure；The helicitic texture with wrapping structure tight fit is processed into TC4 titanium alloys one end to be welded,
Full flight length is 10.5mm.
Step 2, assembling structure joint；The 1Cr18Ni9Ti stainless steel wrapping structures that will have been cleared up fit through threaded connection
Mode is installed on TC4 titanium alloys and treats welding end, and welding structure is treated in formation.
Step 3, welding；Bar to be welded is installed on friction-welding machine according to conventional spin friction welding 1Cr18Ni9Ti not
Rust steel axial length reduction 4mm, friction pressure is 60MPa, and upsetting force is welded for the technological parameter of 120MPa, worn out
Moment upset brakes, and finally obtains the both sides metal TC4 titanium alloys that generation is fully plastically deformed simultaneously stainless with 1Cr18Ni9Ti
Steel composite-joint.
After tested, the tensile strength of gained joint is 540MPa, has been reached by weldering 1Cr18Ni9Ti stainless steel tensile strength
The 91.5% of (590MPa).
Embodiment 3：The spin friction welding method of a kind of TC4 titanium alloys and 0Cr17Ni12Mo2 stainless steels, its specific mistake
Journey is comprised the following steps：
Step 1, prepares 0Cr17Ni12Mo2 stainless steel wrapping structures, and TC4 titanium alloy bars side helicitic texture to be welded；
The 1Cr18Ni9Ti stainless steel barses with diameter greater than rod iron diameter 3mm to be welded are selected, length is processed into for 10mm, internal thread
Size is tooth 0.8mm high, and pitch 1mm, internal diameter is equal to diameter of rod to be welded, and depth is the wrapping structure of 8.5mm.
And each surface to be welded is machined to roughness Ra≤3.2 μm, then using the cleaning removal of acetone ultrasonic wave
Greasy dirt and impurity, obtain wrapping structure；The helicitic texture with wrapping structure tight fit is processed into TC4 titanium alloys one end to be welded,
Full flight length is 9mm.
Step 2, assembling structure joint；The 0Cr17Ni12Mo2 stainless steel wrapping structures that will have been cleared up fit through screw thread company
The mode of connecing is installed on TC4 titanium alloys and treats welding end, and welding structure is treated in formation.
Step 3, welding；Bar to be welded is installed on friction-welding machine and welds 0Cr17Ni12Mo2 according to conventional spin friction
Stainless steel axial length reduction 3mm, friction pressure is 60MPa, and upsetting force is welded for the technological parameter of 120MPa, worn out
Moment upset brake, finally obtain both sides metal simultaneously occur fully plastic deformation TC4 titanium alloys and 0Cr17Ni12Mo2
Stainless steel composite-joint.
After tested, the tensile strength of gained joint is 505MPa, has been reached strong by weldering 0Cr17Ni12Mo2 stainless steel tensions
The 93.5% of degree (540MPa).
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept is subject to equivalent or change, should all be included within the scope of the present invention.
Claims (10)
1. it is a kind of for dissimilar metal spin friction weldering wrapping structure, it is characterised in that：Described wrapping structure is cylindrical steel
The cylindrical sleeves that material is processed, the cylindrical sleeves inwall is machined with internal thread；
When spin friction is welded, the external screw thread that dissimilar metal bar end has is threadedly coupled with the internal thread of wrapping structure, rod iron
The steel matter end contact spin friction of material end face and wrapping structure.
2. it is according to claim 1 for dissimilar metal spin friction weldering wrapping structure, it is characterised in that：
Described dissimilar metal bar is titanium or titanium alloy rod bar.
3. it is according to claim 1 and 2 for dissimilar metal spin friction weldering wrapping structure, it is characterised in that：
The end surface thickness of the wrapping structure is λ, 1mm≤λ≤3mm；
The length of the wrapping structure is L, 5mm≤L≤30mm.
4. it is according to claim 1 and 2 for dissimilar metal spin friction weldering wrapping structure, it is characterised in that：
The external diameter of the wrapping structure is D, a diameter of φ of bar to be welded, φ+2mm≤D.
5. it is according to claim 1 and 2 for dissimilar metal spin friction weldering wrapping structure, it is characterised in that：
The a height of α of tooth of the wrapping structure internal thread, 0.5mm≤α≤2.5mm, pitch is β, 0.8mm≤β≤2.5mm；
The wrapping structure bore depth is γ, 4mm≤γ≤29mm.
6. a kind of spin friction soldering method, it is characterised in that comprise the following steps：
S1, welding preparation, according to Steel Bar to be welded and the size of dissimilar metal bar to be welded, processing the claims 1-5 appoints
Wrapping structure described in one claim of meaning, and be machined with same wrapping structure in dissimilar metal bar end outer wall to be welded
The external thread structure that screw thread coordinates；
S2, assembling structure joint, the wrapping structure that will have been cleared up, the mode of being connected through a screw thread are assemblied in dissimilar metal bar to be welded
Welding end is treated, welding structure is treated in formation；
S3, welding are carried out, and bar to be welded is installed on friction-welding machine, spin friction welding, are braked in worn out moment upset,
Finally obtain the composite-joint that dissimilar metal fully deforms simultaneously with steel both sides.
7. spin friction soldering method according to claim 6, it is characterised in that：
Described dissimilar metal bar is titanium or titanium alloy rod bar, and wrapping structure steel matter is identical with the material of Steel Bar to be welded.
8. spin friction soldering method according to claim 6, it is characterised in that：
It is 40~80MPa according to friction pressure in S3, upsetting force is that the technological parameter of 80~160MPa is welded.
9. the spin friction soldering method according to claim 6 or 7, it is characterised in that：
, more than the 2mm -5mm of Steel Bar diameter to be welded, internal diameter is equal to Steel Bar diameter to be welded for the external diameter of described wrapping structure；
The external thread section length of the dissimilar metal bar end to be welded is more than wrapping structure bore depth.
10. the spin friction soldering method according to claim 6 or 7, it is characterised in that：
In S1 by the surface to be welded of Steel Bar to be welded, dissimilar metal bar to be welded and wrapping structure be machined to roughness Ra≤
3.2 μm, and go to degrease and impurity using the cleaning of acetone ultrasonic wave.
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| CN109595139A (en) * | 2018-12-25 | 2019-04-09 | 浙江麦迪制冷科技股份有限公司 | A kind of oil level controllers and attaching method thereof |
| CN110076441A (en) * | 2019-04-25 | 2019-08-02 | 大连理工大学 | A kind of the dissimilar metal friction welding device and method of ultrasonic vibration auxiliary |
| CN112207420A (en) * | 2020-09-25 | 2021-01-12 | 北京科技大学 | Method for heterogeneous rotary friction welding of titanium alloy and steel |
| CN113894508A (en) * | 2021-11-04 | 2022-01-07 | 山东大学 | Riveting auxiliary rotary friction welding process and application of dissimilar metal bar |
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| CN112207420A (en) * | 2020-09-25 | 2021-01-12 | 北京科技大学 | Method for heterogeneous rotary friction welding of titanium alloy and steel |
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| CN113894508B (en) * | 2021-11-04 | 2023-02-21 | 山东大学 | Riveting auxiliary rotary friction welding process and application of dissimilar metal bar |
| CN114799482A (en) * | 2022-05-19 | 2022-07-29 | 长江师范学院 | Friction welding process for magnesium alloy sacrificial anode rod for water heater |
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