CN101088691A - Process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material - Google Patents
Process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material Download PDFInfo
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- CN101088691A CN101088691A CN 200710072536 CN200710072536A CN101088691A CN 101088691 A CN101088691 A CN 101088691A CN 200710072536 CN200710072536 CN 200710072536 CN 200710072536 A CN200710072536 A CN 200710072536A CN 101088691 A CN101088691 A CN 101088691A
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Abstract
The present invention relates to relates to welding method, and is especially ultrasonic brazing process of obtain composite brazed seam in aluminum-base composite material. The process includes the following steps: 1. filling brazing alloy; 2. primary brazing; and 3. ultrasonic vibration treatment to obtain composite brazed seam in aluminum-base composite material. The said brazing process can obtain brazed joint with greatly improved mechanical performance and heat expansion performance, low heat expansion coefficient, and high strength near that of the mother material.
Description
Technical field
The present invention relates to a kind of welding method.
Background technology
Aluminum matrix composite is one of material the most promising in the new material.Because its high specific strength, high ratio modulus, high temperature resistant, corrosion-resistant, wear-resistant, advantage such as electrical and thermal conductivity performance is good, thermal coefficient of expansion is little have a wide range of applications in fields such as Aeronautics and Astronautics, boats and ships, auto manufacturings.It is simple that non-continuous reinforced aluminium-based composite material has manufacture method, and isotropism can be carried out characteristics such as secondary operations, is considered to a kind of rising composite.But be processed to after the member when this composite, and be applied to real life, produce in the time, just relate to connectivity problem.The method of existing welding non-continuous reinforced aluminium-based composite material has methods such as melting welding, diffusion welding (DW), soldering.But the joint that the method for existing welding non-continuous reinforced aluminium-based composite material exists the welding back to form does not have the problem of wild phase, causes the decline of the total quality of weldment.
Summary of the invention
The present invention does not have the problem of wild phase for the joint that the method that solves existing welding non-continuous reinforced aluminium-based composite material exists the welding back to form, and proposes process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material.Process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material is realized by following steps: one, solder is made the thin slice of 50～500 μ m or made the rod of diameter 2000～5000 μ m or weld gap or the gap port that silk is put into two parts to be welded; Two, be that 20～100kHz, amplitude are that 1～50 μ m, brazing temperature are under 380～450 ℃ the condition ultrasonic brazing 0.1～60s partly to be carried out in soldering in ultrasonic frequency, finish preliminary soldering and form welding point at weld; Three, the temperature of welding point part is adjusted into 450～550 ℃ and kept 1～60 minute, then welding point is applied the pressure of 10～200N, when welding point is exerted pressure, be that 20～100kHz, amplitude are that 1～50 μ m conditions on welding joint applies ultrasonic vibration 0.1～60s, promptly realize obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material with ultrasonic frequency.The mother metal that welds nearly seam district among the present invention is dissolved by solder alloy, adopts repeated ultrasonic to vibrate and stirs down, strengthens body and mixes the new composite of formation with liquefaction matrix alloy and brazing filler metal alloy, realizes that the weld metal zone is the composite structure that contains wild phase.And this kind method can adopt the lower Zn-Al alloy of temperature as filling metal, realize the soldering under the lower temperature, not only microstructure and mother metal are very approaching and connect this composite-joint obtain by this kind method, and its matrix alloy composition significantly changes, the content of Zn element declines to a great extent, and the content of Al element significantly rises, the fusing point of weld seam matrix can be improved, realize the higher temperature environment high-quality joint of work down, the mechanical property and the hot expansibility of welding point all obtain very big improvement simultaneously, thermal coefficient of expansion obtains to reduce, and weld strength is near the strength level of mother metal.Because the content of the Zn element in the joint significantly reduces, the corrosion resistance of joint is improved simultaneously.And this method is the method for welding of no brazing flux under atmospheric conditions, so it is little that this welding method obtains the joint distortion amount, easy to operate, easily be automated welding, relatively low welding temperature just makes that welding process is more energy-saving and cost-reducing, is a kind of " green " solderless after stain and corroding method and do not adopt the method for brazing flux.There is not brazing flux when carrying out aluminium alloy brazing with the method among the present invention, so workpiece is not had any corrosiveness, method among the present invention is short welding interval, reduced 30%～60% than existing method, running cost is low, has reduced by 20%～45% than other method, after utilizing method among the present invention to weld, strength of welded joint significantly improves, and can reach the intensity of mother metal, and the strength of joint that produces than existing method for welding has improved 30%～50%.
The specific embodiment
The specific embodiment one: the method for low temperature brazing aluminium alloy acquisition high temperature serviceability welding point realizes by following steps in the present embodiment: one, solder is made the thin slice of 50～500 μ m or made the rod of diameter 2000～5000 μ m or weld gap or the gap port that silk is put into two parts to be welded; Two, be that 20～100kHz, amplitude are that 1～50 μ m, brazing temperature are under 380～450 ℃ the condition ultrasonic brazing 0.1～60s partly to be carried out in soldering in ultrasonic frequency, finish preliminary soldering and form welding point at weld; Three, the temperature of welding point part is adjusted into 450～550 ℃ and kept 1～60 minute, then welding point is applied the pressure of 10～200N, when welding point is exerted pressure, be that 20～100kHz, amplitude are that 1～50 μ m conditions on welding joint applies ultrasonic vibration 0.1～60s, promptly realize adopting solder alloy to carry out obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material with ultrasonic frequency.
Being particularly useful for matrix in the present embodiment is aluminum or aluminum alloy, and wild phase is Al
2O
3Particle, SiC particle, SiC whisker or Al
18B
4O
33Whisker, wild phase are that 5%～70% the particle enhanced aluminum-based composite material of total composite volume percentage composition or the workpiece of crystal whisker reinforcing aluminum base composite material carry out soldering.
The specific embodiment two: solder was that the quality percentage composition of Zn is a kind of in 50%～99.99% Zn-Al alloy or the pure zinc during the difference of the present embodiment and the specific embodiment one was in the step 1.Other step is identical with the specific embodiment one.
The specific embodiment three: the difference of the present embodiment and the specific embodiment one is in the step 1 solder made the thin slice of 100～400 μ m or makes the rod of diameter 1000～4500 μ m or weld gap or the gap port that silk is put into two parts to be welded.Other step is identical with the specific embodiment one.
The specific embodiment four: the difference of the present embodiment and the specific embodiment one is in the step 1 solder made the thin slice of 200～300 μ m or makes the rod of diameter 2000～4000 μ m or weld gap or the gap port that silk is put into two parts to be welded.Other step is identical with the specific embodiment one.
The specific embodiment five: the difference of the present embodiment and the specific embodiment one is in the step 1 that just solder is made the thin slice of 300 μ m or made the rod of diameter 3000 μ m or weld gap or the gap port that silk is put into two parts to be welded.Other step is identical with the specific embodiment one.
The specific embodiment six: the difference of the present embodiment and the specific embodiment one is in the step 1 solder made the thin slice of 100 μ m or makes the rod of diameter 2500 μ m or weld gap or the gap port that silk is put into two parts to be welded.Other step is identical with the specific embodiment one.
The specific embodiment seven: the difference of the present embodiment and the specific embodiment one is in the step 1 solder made the thin slice of 200 μ m or makes the rod of diameter 2000 μ m or weld gap or the gap port that silk is put into two parts to be welded.Other step is identical with the specific embodiment one.
The specific embodiment eight: it is that 20～50kHz, amplitude are that 5～40 μ m, brazing temperature are under 400～440 ℃ the condition ultrasonic brazing 0.5～30s partly to be carried out in soldering that the difference of the present embodiment and the specific embodiment one is in the step 2 in ultrasonic frequency.Other step is identical with the specific embodiment one.
The specific embodiment nine: it is that 20～30kHz, amplitude are that 10～30 μ m, brazing temperature are under 410～430 ℃ the condition ultrasonic brazing 1～10s partly to be carried out in soldering that the difference of the present embodiment and the specific embodiment one is in the step 2 in ultrasonic frequency.Other step is identical with the specific embodiment one.
The specific embodiment ten: it is that 20kHz, amplitude are that 20 μ m, brazing temperature are under 420 ℃ the condition ultrasonic brazing 3s partly to be carried out in soldering that the difference of the present embodiment and the specific embodiment one is in the step 2 in ultrasonic frequency.Other step is identical with the specific embodiment one.
The specific embodiment 11: the difference of the present embodiment and the specific embodiment one is in the step 3 that the temperature with the welding point part is adjusted into 460～540 ℃ and kept 3～30 minutes, applies the pressure of 50～100N then to welding point.Other step is identical with the specific embodiment one.
The specific embodiment 12: the difference of the present embodiment and the specific embodiment one is in the step 3 that the temperature with the welding point part is adjusted into 470～520 ℃ and kept 5～10 minutes, applies the pressure of 65～80N then to welding point.Other step is identical with the specific embodiment one.
The specific embodiment 13: the difference of the present embodiment and the specific embodiment one is in the step 3 that the temperature with the welding point part is adjusted into 500 ℃ and kept 5 minutes, applies the pressure of 70N then to welding point.Other step is identical with the specific embodiment one.Other step is identical with the specific embodiment one.
The specific embodiment 14: it is that 20k～50kHz, amplitude are that 5～45 μ m conditions on welding joints carry out supersonic oscillations 0.5～30s that the difference of the present embodiment and the specific embodiment one is in the step 3 when welding point is exerted pressure with the ultrasonic frequency.Other step is identical with the specific embodiment one.
The specific embodiment 15: it is that 20～30kHz, amplitude are that 10～35 μ m conditions on welding joints carry out supersonic oscillations 1～10s that the difference of the present embodiment and the specific embodiment one is in the step 3 when welding point is exerted pressure with ultrasonic frequency.Other step is identical with the specific embodiment one.
The specific embodiment 16: it is that 20kHz, amplitude are that 20 μ m conditions on welding joints carry out supersonic oscillations 3s that the difference of the present embodiment and the specific embodiment one is in the step 3 when welding point is exerted pressure with the ultrasonic frequency.Other step is identical with the specific embodiment one.
Claims (10)
1, process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material is characterized in that process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material realizes by following steps: one, solder is made the thin slice of 50～500 μ m or made the rod of diameter 2000～5000 μ m or weld gap or the gap port that silk is put into two parts to be welded; Two, be that 20～100kHz, amplitude are that 1～50 μ m, brazing temperature are under 380～450 ℃ the condition ultrasonic brazing 0.1～60s partly to be carried out in soldering in ultrasonic frequency, finish preliminary soldering and form welding point at weld; Three, the temperature of welding point part is adjusted into 450～550 ℃ and kept 1～60 minute, then welding point is applied the pressure of 10～200N, when welding point is exerted pressure, be that 20～100kHz, amplitude are that 1～50 μ m conditions on welding joint applies ultrasonic vibration 0.1～60s, promptly realize obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material with ultrasonic frequency.
2, process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material according to claim 1 is characterized in that solder in the step 1 is that the quality percentage composition of Zn is a kind of in 50%～99.99% Zn-Al alloy or the pure zinc.
3, process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material according to claim 1 is characterized in that in the step 1 solder made the thin slice of 100～400 μ m or makes the rod of diameter 1000～4500 μ m or weld gap or the gap port that silk is put into two parts to be welded.
4, process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material according to claim 1 is characterized in that in the step 1 solder made the thin slice of 200～300 μ m or makes the rod of diameter 2000～4000 μ m or weld gap or the gap port that silk is put into two parts to be welded.
5, process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material according to claim 1 is characterized in that in the step 1 solder made the thin slice of 300 μ m or makes the rod of diameter 3000 μ m or weld gap or the gap port that silk is put into two parts to be welded.
6, process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material according to claim 1 is characterized in that in the step 2 in ultrasonic frequency being that 20～50kHz, amplitude are that 5～40 μ m, brazing temperature are under 400～440 ℃ the condition ultrasonic brazing 0.5～30s partly to be carried out in soldering.
7, process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material according to claim 1 is characterized in that in the step 2 in ultrasonic frequency being that 20～30kHz, amplitude are that 10～30 μ m, brazing temperature are under 410～430 ℃ the condition ultrasonic brazing 1～10s partly to be carried out in soldering.
8, process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material according to claim 1 is characterized in that in the step 2 in ultrasonic frequency being that 20kHz, amplitude are that 20 μ m, brazing temperature are under 420 ℃ the condition ultrasonic brazing 3s partly to be carried out in soldering.
9, process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material according to claim 1 is characterized in that in the step 3 that temperature with the welding point part is adjusted into 460～540 ℃ and kept 5～30 minutes, applies the pressure of 50～100N then to welding point.
10, process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material method according to claim 1 is characterized in that in the step 3 when welding point is exerted pressure with ultrasonic frequency being that 20～50kHz, amplitude are that 5～45 μ m conditions on welding joints carry out supersonic oscillations 0.5～30s.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100725364A CN100493795C (en) | 2007-07-20 | 2007-07-20 | Process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material |
| US11/986,612 US7624906B2 (en) | 2007-07-20 | 2007-11-21 | Ultrasonic brazing of aluminum alloy and aluminum matrix composite |
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| CNB2007100725364A CN100493795C (en) | 2007-07-20 | 2007-07-20 | Process of obtaining composite brazed seam with ultrasonic brazed aluminium-base composite material |
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| CN100493795C CN100493795C (en) | 2009-06-03 |
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