CN1326836A - Method for low temperature welding aluminium based composite material without protection - Google Patents
Method for low temperature welding aluminium based composite material without protection Download PDFInfo
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- CN1326836A CN1326836A CN 00117764 CN00117764A CN1326836A CN 1326836 A CN1326836 A CN 1326836A CN 00117764 CN00117764 CN 00117764 CN 00117764 A CN00117764 A CN 00117764A CN 1326836 A CN1326836 A CN 1326836A
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Abstract
Stainless steel wire is used to scrape the surface of workpiece painted with Zn-Al base solder to destroy the surface of the composite material while the molten Zn-Al base solder is made to penetrate into the composite aluminium base mother material under the case of applying pressure. The method of the present invention needs no flux, protective gas and cosolvent evaporated gas, and has low cost, wide practicability and high joint strength.
Description
The present invention proposes a kind of method of low temperature welding aluminium based composite material without protection.
Aluminum matrix composite is subjected to people's very big attention owing to advantages such as having high specific strength, high specific stiffness, high ratio modulus, high-wearing feature and dimensional stability, be used widely at aspects such as Aero-Space, auto industrys at present, and more and more demonstrate great vitality.Along with to the going deep into of aluminum matrix composite basis and application study, its welding procedure and technology have at home and abroad begun to draw attention in recent years, and this is one of composite practicalityization key technology that must solve.The welding of aluminum matrix composite not only requires matrix will form excellent metallurgical between matrix to connect, and will guarantee that good interface combines between wild phase and matrix, and excessive chemical reaction can not take place.But, because matrix and the physics between the wild phase, the chemical property of aluminum matrix composite differ greatly, therefore weldability is very poor, be difficult to obtain desirable joint performance, make the research of this kind material welding procedure and weldability lag far behind the research of others, become the obstacle that it moves towards practicability.At present, the shortcoming of method that the welding of aluminum matrix composite is adopted and existence such as following several: 1. welding: (1) appearance of weld is bad, easily produces weld defect; (2) reaction of wild phase and matrix makes the interfacial combined function variation; (3) wild phase segregation in weld seam causes the inhomogeneous of weld properties; (4) if contain high Zn of saturated vapour pressure and Mg in the aluminum matrix composite, then there is the volatilization problem.2. diffusion welding (DW): the oxide-film of one deck densification on (1) aluminum matrix composite surface is difficult to decompose, and influences the atom diffusion; (2) there is the direct contact phenomena of wild phase-----wild phase on the aluminum matrix composite contact-making surface, is being difficult to realize that the diffusion between the wild phase connects under the diffusion welding (DW) condition.3. soldering: the oxide-film on (1) aluminum matrix composite surface have a strong impact on solder on parent wetting with sprawl, become one of major obstacle of aluminum matrix composite soldering; (2) fusing point of the fusing point of many solders and aluminum matrix composite is more or less the same, and the brazing process temperature is restive, and the burning corrode of mother metal easily takes place, and brings very big difficulty to brazing process; (3) wild phase on aluminum matrix composite surface seriously hinders solder wetting on mother metal and sprawls.4. friction welding (FW): mother metal does not melt in the whole welding process, is a kind of method of attachment of welding the granule enhancement type composite therefore.But owing to be connected near surface more plastic deformation need take place, cause the serious fracture of fiber, therefore this method welding fiber reinforcement type composite is inappropriate.5. electric resistance welding: in the electric resistance welding process, composite produced superfuse, splash, fiber bonds, broken and generation is empty, strength of joint is affected.
Purpose of the present invention proposes a kind of method that can weld all kinds of aluminum matrix composites in high quality at the deficiency that prior art exists.
The object of the present invention is achieved like this: adopt stainless steel wire or tungsten filament scraped finish to scribble the surface of the work of Zn-Al parent metal, its effect is similar to the effect of adopting the brazing flux striping in the method for welding.This scraped finish process can be destroyed the oxide layer attached to the aluminum matrix composite surface, and the scolder of molten state penetrates in the mother metal simultaneously, and its result will float to the surface of molten material for the partial oxidation layer.After the problem of removing oxide-film solves, the molecule of Zn-Al scolder penetrate in the aluminum matrix composite and with a kind of new chemical constitution of its formation, pressure process can promote the carrying out of this infiltration process, its effect is similar to the diffusion process in the diffusion welding (DW).In addition, can promote the removal of surface film oxide, help improving the performance indications such as intensity of welding point by rubbing.Concrete steps of the present invention are: 1. at first clear up workpiece, with the oxide-film on the workpiece, oil film etc. remove; 2. with propane workpiece is heated to 400 ℃-450 ℃; 3. be coated with scolder at the workpiece weld; 4. scrape workpiece once more with steel wire; With two welded piece butt joints, heating, scraped finish, give and press.
The advantage that the present invention has: 1. without cosolvent, do not need gas shield, also do not have the hydrotropy boil-off gas; 2. high-intensity joint, the shear strength of joint can reach 90% of former workpiece; 3. minimum deformation rate is because welding temperature only is about 386 ℃, so the ratio of defects of the deformation rate of aluminum matrix composite mother metal and mother metal has very big reduction than conventional method; 4. technology is simple, cost is low, practicality is wide.
Embodiment:
During 10 millimeters of diameter of work φ of the present invention, give and press the 100-200 kilogram, heating-up temperature is 420 ℃.
Claims (1)
1, a kind of method of low temperature welding aluminium based composite material without protection is characterized in that: realize according to the following steps:
1. at first clear up workpiece, the oxide-film on the workpiece, oil film etc. removed,
2. with propane workpiece is heated to 400 ℃-450 ℃,
3. be coated with scolder at the workpiece weld,
4. scrape workpiece once more with steel wire,
5. with two welded piece butt joints, heating, scraped finish, give and press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00117764A CN1103262C (en) | 2000-06-03 | 2000-06-03 | Method for low temperature welding aluminium based composite material without protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00117764A CN1103262C (en) | 2000-06-03 | 2000-06-03 | Method for low temperature welding aluminium based composite material without protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1326836A true CN1326836A (en) | 2001-12-19 |
| CN1103262C CN1103262C (en) | 2003-03-19 |
Family
ID=4587026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00117764A Expired - Fee Related CN1103262C (en) | 2000-06-03 | 2000-06-03 | Method for low temperature welding aluminium based composite material without protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1103262C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769414A (en) * | 2014-02-24 | 2014-05-07 | 张央英 | Novel composite material and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5161966A (en) * | 1974-11-27 | 1976-05-28 | Yamashita Tekko Kk | Paretsutoheno batsugutsumitsukesochi |
| JPH0945837A (en) * | 1995-07-26 | 1997-02-14 | Nec Kansai Ltd | Solder plating device |
| CN1161263A (en) * | 1996-04-02 | 1997-10-08 | 杨昌海 | Aluminium soldering tech. with no shielded gas |
-
2000
- 2000-06-03 CN CN00117764A patent/CN1103262C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769414A (en) * | 2014-02-24 | 2014-05-07 | 张央英 | Novel composite material and preparation method thereof |
| CN103769414B (en) * | 2014-02-24 | 2016-05-11 | 张央英 | A kind of composite and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1103262C (en) | 2003-03-19 |
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| C14 | Grant of patent or utility model | ||
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