CN108941911A - Ti3Al-stainless steel dissimilar metal laser welding method - Google Patents
Ti3Al-stainless steel dissimilar metal laser welding method Download PDFInfo
- Publication number
- CN108941911A CN108941911A CN201811153326.2A CN201811153326A CN108941911A CN 108941911 A CN108941911 A CN 108941911A CN 201811153326 A CN201811153326 A CN 201811153326A CN 108941911 A CN108941911 A CN 108941911A
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- CN
- China
- Prior art keywords
- welding
- stainless steel
- weld seam
- dissimilar metal
- intermetallic compound
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/32—Bonding taking account of the properties of the material involved
- B23K26/323—Bonding taking account of the properties of the material involved involving parts made of dissimilar metallic material
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/211—Bonding by welding with interposition of special material to facilitate connection of the parts
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/302—Cu as the principal constituent
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
Abstract
The present invention relates to a kind of Ti3Al- stainless steel dissimilar metal laser welding method, belongs to material welding technology field.The present invention is based on material and laser welding characteristic, using V-Cu composite layer as intermediate layer material aiming at the problem that heterogeneous base material is directly welded and cracked immediately, to inhibit the generation of weld metal zone brittle intermetallic thing in weld seam, alleviate welding stress, improves welding quality, obtain the welding point of high quality.It is assembled including plate and fixed, middle layer pre-tightens, and using the welding parameter of optimization, laser beam is along middle layer welding.Advantage is: realizing that forming is beautiful by way of adding middle layer, good connector the defects of flawless, pore-free.
Description
Technical field
The present invention relates to belonging to material welding technology field, in particular to a kind of Ti3Al-stainless steel dissimilar metal laser
Welding method.Suitable for technical fields such as metallurgy, aerospace, automobile and military projects.
Background technique
Ti3Al base intermetallic compound has specific strength more higher than titanium alloy, better high-temperature mechanical property and anti-oxidant
Performance has preferable application prospect in the existing preferable application of aerospace field on automobile.But its high cost limits
Ti3Extensive use of the Al base intermetallic compound as structural member.Therefore, with other metals especially with the composite component of stainless steel
As important developing direction.Ti3It is also easy to produce in Al base intermetallic compound-stainless steel fusion welding welding point a large amount of brittle
Ti-Fe intermetallic compound.Further, since the two is in physics, chemical property significant difference, connector there are abundant residues stress,
Connector is caused to crack immediately.
Brittle Ti-Fe intermetallic compound can be reduced by adding single intermediate layer material, to a certain degree improvement weld seam
Energy.But it is limited by the huge physics of two sides metal, chemical property difference, fails have suitable metal to meet with two sides metal simultaneously
With preferable metallurgical performance.Single Cu middle layer is such as used, postwelding does not crack immediately, but a large amount of brittle Ti-Cu metals
Between compound cause strength of joint extremely low.
Summary of the invention
The purpose of the present invention is to provide a kind of Ti3Al-stainless steel dissimilar metal laser welding method is solved now
Heterogeneous base material existing for technology directly welds the problems such as cracking immediately.The present invention is directed to Ti3Al base intermetallic compound-stainless steel
There are brittle problems for different-metal material welding connector, and using laser as welding heat source, V, Cu composite layer are as middle layer, by changing
Become the chemical component of weld seam, inhibits Ti3Brittle phase in Al base intermetallic compound-stainless steel weld joint, obtain V-Ti solid solution and
Cu-Fe solid solution realizes Ti to reduce the brittleness of connector3The connection of Al base intermetallic compound-stainless steel dissimilar metal.
The present invention includes: plate assembly and fixes, and middle layer pre-tightens, and using the welding parameter of optimization, laser beam is along middle layer welding etc.
Step.The good connector for the defects of feature is that forming beauty is realized by way of adding middle layer, flawless, pore-free.
Above-mentioned purpose of the invention is achieved through the following technical solutions:
Ti3Al-stainless steel dissimilar metal laser welding method, includes the following steps:
A) joint form: joint form is the docking of I shape groove, composite interlayer with a thickness of 0.5-0.7mm, wherein V layers with a thickness of
0.2-0.3mm, Cu layers guarantee Ti when assembling with a thickness of 0.3-0.4mm, plate3Al base intermetallic compound-stainless steel contact surface
There is 20-40N pretightning force；
B) welding procedure: being welded using Nd:YAG pulse laser soldering equipment, by optimizing welding parameter, improves weldability
Can, avoid the defect of stomata, crackle, incomplete fusion；
When c) welding, laser facula is located on the center line of composite interlayer, melts middle layer sufficiently and the fusing of base material part；
D) V element is added in weld seam, increases the concentration of V in weld seam, and the concentration of element of Ti and Fe reduce, and improve weld seam
Can, inhibit Ti-Fe intermetallic compound to generate, obtain Ti-V solid solution, reduces connector brittleness；
E) Cu element is added in weld seam, improves weld seam chemical component, and the preferable Cu base solid solution of plasticity is being obtained at stainless steel
Body.
The optimization welding parameter of the Nd:YAG pulse laser soldering equipment is: laser power 300-400W, pulse current
70-100A, pulse width 5-8Hz, defocusing amount 2mm, speed of welding 180-220mm/min.
By changing the chemical component of weld seam, inhibit Ti3Brittle phase in Al base intermetallic compound-stainless steel weld joint, is obtained
V-Ti solid solution and Cu-Fe solid solution are obtained, to reduce the brittleness of connector.
The chemical component for improving weld seam using V, the gentle solution welding stress of chemical component that weld seam is improved using Cu.
The beneficial effects of the present invention are:
1, realize that forming is beautiful by way of adding middle layer, good connector the defects of flawless, pore-free.
2, by using composite interlayer laser welding, the welding point of high quality is obtained.In strength test, tensile strength
Up to 198MPa.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative example and its explanation is used to explain the present invention, and is not constituted improper limitations of the present invention.
Fig. 1 is welding method of the invention and joint structure schematic diagram；
Fig. 2 is Ti of the invention3Al base intermetallic compound-stainless joint overall picture；
Fig. 3 is Ti of the invention3Al base intermetallic compound-stainless joint microstructure (weld seam Ti3The side Al high power photo,
Weld pipe mill high power photo, weld seam stainless steel side high power photo)；
Fig. 4 is Laser Welding welding process schematic of the invention.
In figure: 1, Ti3Al base intermetallic compound plate；2, composite interlayer；3, stainless steel plate；4, pressing plate；5, welding is flat
Platform；6, pretightning force adjusts screw；7, cushion block is pre-tightened.
Specific embodiment
Detailed content and its specific embodiment of the invention are further illustrated with reference to the accompanying drawing.
Referring to FIG. 1 to FIG. 4, the Ti of the invention using composite interlayer3Al base intermetallic compound-stainless steel is different
Kind metal laser welding method, for Ti3Al base intermetallic compound-stainless steel dissimilar metal welding joints are asked there are brittle
Topic inhibits Ti by changing the chemical component of weld seam as middle layer using V/Cu composite layer using laser as heat source3Al
Brittle phase in base intermetallic compound-stainless steel weld joint obtains V-Ti solid solution and Cu-Fe solid solution, to reduce connector
Brittleness realizes Ti3The connection of Al base intermetallic compound-stainless steel dissimilar metal.Specific step is as follows:
A) joint form: joint form is the docking of I shape groove, composite interlayer with a thickness of 0.6mm, wherein V layers with a thickness of
0.2mm, Cu layers need to guarantee Ti when assembling with a thickness of 0.4mm, plate3Al base intermetallic compound-stainless steel contact surface has centainly
Pretightning force；
B) it welding procedure: is welded using Nd:YAG pulse laser soldering equipment, laser power 300-400W, pulse current 70-
100A, pulse width 5-8Hz, defocusing amount 2mm, speed of welding 180-220mm/min.
When c) welding, laser facula is located on the center line of composite interlayer, melts middle layer sufficiently and base material part
Fusing.
D) V element is added in weld seam, increases the concentration of V in weld seam, and the concentration of element of Ti and Fe reduce, and improve weldering
Performance is stitched, Ti-Fe intermetallic compound is inhibited to generate, obtains Ti-V solid solution, reduces connector brittleness；
E) Cu element is added in weld seam, improves weld seam chemical component, and the preferable Cu base solid solution of plasticity is being obtained at stainless steel
Body.
The laser power of the Nd:YAG pulse laser soldering equipment is 300-400W, pulse current 70-100A, pulse
Width is 5-8Hz, defocusing amount 2mm, speed of welding 180-220mm/min.
By changing the chemical component of weld seam, inhibit Ti3Brittle phase in Al base intermetallic compound-stainless steel weld joint, is obtained
V-Ti solid solution and Cu-Fe solid solution are obtained, to reduce the brittleness of connector.
Embodiment:
Ti is carried out using method of the invention3The welding of Al base intermetallic compound-stainless steel dissimilar metal: it is directed to heterogeneous base material
Directly welding the problem of cracking immediately, it is based on material and laser welding characteristic, using V-Cu composite layer as intermediate layer material, from
And inhibit the generation of weld metal zone brittle intermetallic thing in weld seam, alleviate welding stress, improve welding quality, obtains the welding of high quality
Connector.
Firstly, with pressing plate 4 by Ti3Al base intermetallic compound plate 1 and stainless steel plate 3 are clamped in welding platform 5, Ti3Al
The composite interlayer 2 of 0.6mm thickness is placed between base intermetallic compound plate 1 and stainless steel plate 3, and screw is adjusted by pretightning force
6 make Ti with cushion block 7 is pre-tightened3Certain pretightning force is kept between Al base intermetallic compound plate 1- composite interlayer 2- stainless steel plate 3.
Accurate control welding condition, is located at light hot spot on the center line of composite interlayer 3, makes composite interlayer 2
Sufficiently melt and base material (Ti3Al base intermetallic compound plate 1 and stainless steel plate 3) part fusing, form Ti3Change between Al Base Metal
Close object-weld seam-stainless steel welded joint.It thus is avoided that and generates a large amount of brittle Ti-Fe intermetallic compounds within a fitting.V member
Element increases the concentration of V in weld seam, and the concentration of element of Ti and Fe reduce, and improves Weld Performance.Cu element improves weld seam chemistry
Ingredient is obtaining the preferable Cu based solid solution of plasticity at stainless steel, is alleviating welding stress, improve the mechanical property of connector.
The foregoing is merely preferred embodiments of the invention, are not intended to restrict the invention, for the technology of this field
For personnel, the invention may be variously modified and varied.All any modification, equivalent substitution, improvement and etc. made for the present invention,
It should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of Ti3Al-stainless steel dissimilar metal laser welding method, characterized by the following steps:
A) joint form: joint form is the docking of I shape groove, composite interlayer with a thickness of 0.5-0.7mm, wherein V layers with a thickness of
0.2-0.3mm, Cu layers guarantee Ti when assembling with a thickness of 0.3-0.4mm, plate3Al base intermetallic compound-stainless steel contact surface
There is 20-40N pretightning force；
B) welding procedure: being welded using Nd:YAG pulse laser soldering equipment, by optimizing welding parameter, improves weldability
Can, avoid the defect of stomata, crackle, incomplete fusion；
When c) welding, laser facula is located on the center line of composite interlayer, melts middle layer sufficiently and the fusing of base material part；
D) V element is added in weld seam, increases the concentration of V in weld seam, and the concentration of element of Ti and Fe reduce, and improve weld seam
Can, inhibit Ti-Fe intermetallic compound to generate, obtain Ti-V solid solution, reduces connector brittleness；
E) Cu element is added in weld seam, improves weld seam chemical component, and the preferable Cu base solid solution of plasticity is being obtained at stainless steel
Body.
2. Ti according to claim 13Al-stainless steel dissimilar metal laser welding method, it is characterised in that: described
The optimization welding parameter of Nd:YAG pulse laser soldering equipment is: laser power 300-400W, pulse current 70-100A, pulse are wide
Spend 5-8Hz, defocusing amount 2mm, speed of welding 180-220mm/min.
3. Ti according to claim 13Al-stainless steel dissimilar metal laser welding method, it is characterised in that: pass through change
The chemical component of weld seam inhibits Ti3Brittle phase in Al base intermetallic compound-stainless steel weld joint obtains V-Ti solid solution and Cu-
Fe solid solution, to reduce the brittleness of connector.
4. Ti according to claim 13Al-stainless steel dissimilar metal laser welding method, it is characterised in that: changed using V
The chemical component of kind weld seam, the gentle solution welding stress of chemical component that weld seam is improved using Cu.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811153326.2A CN108941911A (en) | 2018-09-30 | 2018-09-30 | Ti3Al-stainless steel dissimilar metal laser welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811153326.2A CN108941911A (en) | 2018-09-30 | 2018-09-30 | Ti3Al-stainless steel dissimilar metal laser welding method |
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| Publication Number | Publication Date |
|---|---|
| CN108941911A true CN108941911A (en) | 2018-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811153326.2A Withdrawn CN108941911A (en) | 2018-09-30 | 2018-09-30 | Ti3Al-stainless steel dissimilar metal laser welding method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110142496A (en) * | 2019-06-05 | 2019-08-20 | 哈尔滨工业大学 | A kind of TiAl/Ti adding Y shape middle layer3Al electron beam welding method for dissimilar materials |
| CN110216376A (en) * | 2019-06-13 | 2019-09-10 | 吉林大学 | Using the TiAl-base alloy and 40Cr steel dissimilar metal laser soldering method of composite interlayer |
| CN110421261A (en) * | 2019-08-21 | 2019-11-08 | 新疆大学 | Add titanium alloy-stainless steel dissimilar metal laser welding method of composite interlayer |
| CN113857669A (en) * | 2021-10-22 | 2021-12-31 | 吉林大学 | Laser welding method for titanium alloy and aluminum alloy dissimilar materials |
| CN115213561A (en) * | 2022-07-29 | 2022-10-21 | 苏州大学 | Method for realizing laser sealing of glass and stainless steel by adding titanium as transition layer |
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2018
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110142496A (en) * | 2019-06-05 | 2019-08-20 | 哈尔滨工业大学 | A kind of TiAl/Ti adding Y shape middle layer3Al electron beam welding method for dissimilar materials |
| CN110216376A (en) * | 2019-06-13 | 2019-09-10 | 吉林大学 | Using the TiAl-base alloy and 40Cr steel dissimilar metal laser soldering method of composite interlayer |
| CN110421261A (en) * | 2019-08-21 | 2019-11-08 | 新疆大学 | Add titanium alloy-stainless steel dissimilar metal laser welding method of composite interlayer |
| CN110421261B (en) * | 2019-08-21 | 2021-09-28 | 新疆大学 | Laser welding method for titanium alloy-stainless steel dissimilar metal added with composite intermediate layer |
| CN113857669A (en) * | 2021-10-22 | 2021-12-31 | 吉林大学 | Laser welding method for titanium alloy and aluminum alloy dissimilar materials |
| CN115213561A (en) * | 2022-07-29 | 2022-10-21 | 苏州大学 | Method for realizing laser sealing of glass and stainless steel by adding titanium as transition layer |
| CN115213561B (en) * | 2022-07-29 | 2023-11-24 | 苏州大学 | Laser sealing method for glass and stainless steel by adding titanium as transition layer |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181207 |
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