CN105537756A - Low-temperature vacuum diffusion connecting method for copper and zinc-based alloy - Google Patents
Low-temperature vacuum diffusion connecting method for copper and zinc-based alloy Download PDFInfo
- Publication number
- CN105537756A CN105537756A CN201610066125.3A CN201610066125A CN105537756A CN 105537756 A CN105537756 A CN 105537756A CN 201610066125 A CN201610066125 A CN 201610066125A CN 105537756 A CN105537756 A CN 105537756A
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- China
- Prior art keywords
- zinc
- copper
- vacuum
- diffusion
- pressure
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Classifications
-
- 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
- B23K20/14—Preventing or minimising gas access, or using protective gases or vacuum during 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
- B23K20/24—Preliminary treatment
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
Abstract
The invention provides a vacuum diffusion connecting method for copper and zinc-based alloy. The vacuum diffusion connecting method comprises the following steps: bonding the surfaces, to be connected, of a copper material and zinc-based alloy together so as to form a contact surface; heating to a preset temperature under a 10<-3> to 10<-4> Pa vacuum condition; and under a pressure insufficient to cause plastic deformation and at the preset temperature, enabling the contact surface to be in a solid phase state, and promoting element diffusion so as to realize connection. The formed copper and zinc-based alloy diffusion welding joint is stable in interface bonding, even in element diffusion and reliable in performance, and can meet the use requirements of the engineering field on special copper and zinc joints. The low-temperature vacuum diffusion connecting method for copper and zinc-based alloy, related to the invention, is stable in technical process and high in production efficiency, can realize multi-piece massive production in one furnace, and is favorable to being popularized and applied in actual production. By adopting the technical method provided by the invention, the great diffusion combination of copper and zinc-based alloy interfaces can be realized, and the joint welding rate can reach 100%.
Description
Technical field
The invention belongs to welding technology field, particularly the cryogenic vacuum diffusion connection method of a kind of copper and zinc-containing alloy.
Background technology
Copper and its alloy has good thermal conductivity, electric conductivity, ductility and corrosion stability, has important application in the field such as heat exchanger and electrotechnical apparatus.Zinc-containing alloy casting character is excellent, can be used for producing complex-shaped part, but its corrosion stability is poor, and can cause the change in size of part due to timeliness effect.Copper is connected with zinc-containing alloy, copper-zinc composite component can be formed, give full play to the characteristic that both have complementary advantages, realize the particular/special requirement on 26S Proteasome Structure and Function.
When carrying out melting welding to copper and zinc-containing alloy, joint is easy to generate a large amount of copper zinc intermetallic compounds, as CuZn, Cu
5zn
8, CuZn
3deng, fabrication weldability is difficult to realize; And these brittle intermetallic things very easily cause joint crack initiation and fracture, can not meet serviceability requirement.
Diffusion in vacuum connects can realize connection that is of the same race or dissimilar metal under solid phase conditions, by control temperature, temperature retention time and pressure, do not form or formed a small amount of intermetallic compound of discontinuous distribution, the impact of butt joint microstructure and property is less, can realize the diffusion bond of high-quality.But in actual welding, when adopting vacuum diffusion welding to be connected with zinc-containing alloy copper, because zinc evaporation is serious, easily produce pore, and joint plasticity is deteriorated, and realizes good combination and still has very large difficulty.
Summary of the invention
In order to solve the problem, the present invention proposes the low temperature low vacuum diffusion connection method of a kind of copper and zinc-containing alloy, on the basis of system test research copper and zinc-containing alloy diffusion in vacuum connection performance, through repetition test, when finding to be connected with zinc-containing alloy copper under 325 ~ 380 DEG C of lower temperatures, both effectively can avoid the evaporation of zinc, ensure again that connecting material had better forming ability and joint plasticity.Its principle is under vacuum, utilizes the moulding flowing of temperature and pressure generation microcosmic and utilizes the phase counterdiffusion of copper and Zn-ef ficiency, realizing the diffusion bond of copper and zinc-containing alloy dissimilar metal.
For achieving the above object, the present invention adopts following technical scheme:
A diffusion in vacuum method of attachment for copper and zinc-containing alloy, comprising:
Pre-treatment;
The face to be connected of copper material and zinc-containing alloy is fit together, forms contact surface;
Design temperature is heated in vacuum or protective atmosphere;
Under the pressure being not enough to cause plastic deformation and design temperature, described contact surface is made to produce solid-state diffusion under liquid phase state and reach connection not formed;
Described design temperature is 325 ~ 380 DEG C.
Preferably, the vacuum of described vacuum condition is 10
-3~ 10
-4pa.
Preferably, be not enough to cause the pressure of plastic deformation to be 2 ~ 8MPa described in.
Preferably, after pretreatment, surface smoothness is 3 ~ 6 grades for described copper material or zinc-containing alloy.
The crystallized ability of junction is poor, strict to temperature requirement, not easily spreads.Therefore, further design temperature is preferably 360 ~ 375 DEG C in the present invention.
Preferably, described pre-treatment step is: copper material or zinc-containing alloy carried out polish, clean, pickling, drying and processing.
Preferably, the described concrete steps being heated to design temperature in vacuum or protective atmosphere are: vacuumize 10 ~ 30min, vacuum reaches 10
-3~ 10
-4pa, open heating schedule, programming rate is 5 ~ 15 DEG C/min, and after being warming up to 280 ~ 310 DEG C, insulation 5 ~ 10min, continues to be warming up to 350 ~ 380 DEG C.
Preferably, under described pressure being not enough to cause plastic deformation and design temperature, the concrete steps making described contact surface reach connection being formed or produce solid-state diffusion under not forming liquid phase state are: open pressurization protocols, pressure is 2 ~ 8MPa, the mode of exerting pressure is continuous pressure, insulation 15 ~ 60min, pressure duration controls at 15 ~ 60min.
Preferably, after having connected, remove pressure, burner hearth has been cooled, when fire box temperature is down to below 100 DEG C, sample has been taken out.
Preferably, the chemical composition (wt.%) of described zinc-containing alloy is as follows: Al8.2% ~ 11.5%, Cu0.5% ~ 1.3%, Mg0.02% ~ 0.03%, Fe≤0.035%, Pb≤0.005%, Sn≤0.005%, Cd≤0.001, Zn surplus, in mass fraction.
Concrete steps are as follows:
(1) sand paper of different model is adopted to polish to copper and zinc-containing alloy test plate (panel) surface, guarantee smooth bright and clean (surface smoothness 3 ~ 6 grades) on welded test plate (panel) surface, acetone is adopted to clean copper coin and zinc-containing alloy test plate (panel) surface respectively, wipe oil and oxide skin; Adopt the HCl of 5% ~ 15% to carry out pickling to copper surface, keep 4 ~ 8min, then use alcohol rinse, stand-by after drying, guarantee that test plate (panel) clean surface is dry.
(2) copper coin and zinc-containing alloy plate overlap are placed between the upper push-down head of diffusion connection, combination test plate (panel) to be welded are put into the vacuum drying oven of diffusion in vacuum connection device, close fire door.
(3) carry out vacuumizing 10 ~ 30min, vacuum reaches 10
-3~ 10
-4pa, open heating schedule, programming rate is 5 ~ 15 DEG C/min, for guaranteeing to be heated evenly, arrange insulation platform at 280 ~ 310 DEG C in temperature-rise period, temperature retention time controls at 5 ~ 10min, then continues to be warming up to 350 ~ 375 DEG C, open pressurization protocols, pressure is 2 ~ 8MPa, and the mode of exerting pressure is continuous pressure, guarantees uniform force, insulation 15 ~ 60min, pressure duration controls at 15 ~ 60min.
(4), after diffusion connection completes, remove pressure, and adopt recirculated water to cool burner hearth, when fire box temperature is down to below 100 DEG C, welded specimen is taken out.
Present invention also offers the copper-zinc composite component prepared by above-mentioned either method.
Beneficial effect of the present invention:
Utilize the cryogenic vacuum diffusion connection method of copper of the present invention and zinc-containing alloy, under temperature, pressure and temperature retention time effect, achieve copper by the flowing of solid phase interface microplasticity with Elements Diffusion to be connected with the diffusion in vacuum of zinc-containing alloy, and the copper formed and zinc-containing alloy Diffusion Bonded Joint interface cohesion are stablized, Elements Diffusion is even, dependable performance, can meet the instructions for use of engineering field to copper zinc xenogenesis joint.The diffusion in vacuum method of attachment of the copper that the present invention relates to and zinc-containing alloy, stable technical process, production efficiency are high, can realize the mass production of a stove more than one piece, be beneficial to and apply in production reality.The process adopting the present invention to propose, can realize the good diffusion bond of copper and zinc-containing alloy interface, joint welded rate can reach 100%.
Detailed description of the invention
Embodiment 1:
The ZA-8 zinc-containing alloy be T2 red copper and the thickness of 2mm by thickness being 2mm carries out cryogenic vacuum and spreads and be connected, and workpiece size is 40mm × 80mm.
Concrete technology step is as follows:
(1) front surface cleaning is welded
Adopt No. 150 and No. 280 abrasive paper for metallograph to polish to T2 copper plate and ZA-8 zinc-containing alloy plate welding surface, guarantee the smooth bright and clean of test plate (panel).Adopt acetone to clean test plate (panel) surface, wipe oil and oxide skin, adopt the HCl of 15% to carry out pickling to copper coin, keep 4min, then use alcohol rinse, hair dryer is stand-by after drying, and guarantees that test plate (panel) clean surface is dry.
(2) diffusion in vacuum connects
Copper coin after clean and zinc-containing alloy plate overlap are placed between upper push-down head that diffusion connects, put into the vacuum drying oven of diffusion in vacuum connection device, close fire door.
(3) carry out vacuumizing 15min, vacuum reaches 10
-3pa, open heating schedule, programming rate is 10 DEG C/min, for guaranteeing to be heated evenly, arrange insulation platform at 290 DEG C in temperature-rise period, temperature retention time controls, for 8min, then to continue to be warming up to 340 DEG C, open pressurization protocols, pressure is 8MPa, and the mode of exerting pressure is continuous pressure, guarantees uniform force, insulation 60min, pressure duration controls at 60min.
(4), after diffusion connection completes, remove pressure and adopt recirculated water to cool burner hearth, when vacuum chamber temperature is down to 80 DEG C, welded specimen being taken out.
Embodiment 2:
The ZA-12 zinc-containing alloy be T2 red copper and the thickness of 4mm by thickness being 3mm carries out cryogenic vacuum diffusion welding (DW) and is connected, and workpiece size is 60mm × 60mm.
Concrete technology step is as follows:
(1) front surface cleaning is welded
Adopt No. 100 and No. 250 abrasive paper for metallograph to polish to T2 copper plate and ZA-12 zinc-containing alloy plate welding surface, guarantee the smooth bright and clean of test plate (panel).Adopt acetone to clean test plate (panel) surface, wipe oil and oxide skin, adopt the HCl of 5% to carry out pickling to copper coin, keep 6min, then use alcohol rinse, hair dryer is stand-by after drying, and guarantees that test plate (panel) clean surface is dry.
(2) diffusion in vacuum connects
Copper coin after clean and zinc-containing alloy plate overlap are placed between upper push-down head that diffusion connects, put into the vacuum drying oven of diffusion in vacuum connection device, close fire door.
(3) carry out vacuumizing 30min, vacuum reaches 10
-4pa, open heating schedule, programming rate is 15 DEG C/min, for guaranteeing to be heated evenly, arrange insulation platform at 310 DEG C in temperature-rise period, temperature retention time controls, for 8min, then to continue to be warming up to 360 DEG C, open pressurization protocols, pressure is 6MPa, and the mode of exerting pressure is continuous pressure, guarantees uniform force, insulation 45min, pressure duration controls at 45min.
(4), after diffusion connection completes, remove pressure and adopt recirculated water to cool burner hearth, when vacuum chamber temperature is down to 60 DEG C, welded specimen being taken out.
Embodiment 3:
The ZA-8 zinc-containing alloy be T2 red copper and the thickness of 2mm by thickness being 2mm carries out diffusion in vacuum and is connected, and workpiece size is 40mm × 80mm.
Concrete technology step is as follows:
(1) front surface cleaning is welded
Adopt No. 150 and No. 280 abrasive paper for metallograph to polish to T2 copper plate and ZA-8 zinc-containing alloy plate welding surface, guarantee the smooth bright and clean of test plate (panel).Adopt acetone to clean test plate (panel) surface, wipe oil and oxide skin, adopt the HCl of 15% to carry out pickling to copper coin, keep 4min, then use alcohol rinse, hair dryer is stand-by after drying, and guarantees that test plate (panel) clean surface is dry.
(2) diffusion in vacuum connects
Copper coin after clean and zinc-containing alloy plate overlap are placed between upper push-down head that diffusion connects, put into the vacuum drying oven of diffusion in vacuum connection device, close fire door.
(3) carry out vacuumizing 15min, vacuum reaches 10
-4pa, open heating schedule, programming rate is 10 DEG C/min, for guaranteeing to be heated evenly, arrange insulation platform at 290 DEG C in temperature-rise period, temperature retention time controls, for 8min, then to continue to be warming up to 370 DEG C, open pressurization protocols, pressure is 5MPa, and the mode of exerting pressure is continuous pressure, guarantees uniform force, insulation 30min, pressure duration controls at 30min.
(4), after diffusion connection completes, remove pressure and adopt recirculated water to cool burner hearth, when vacuum chamber temperature is down to 80 DEG C, welded specimen being taken out.
Embodiment 4:
The ZA-8 zinc-containing alloy be T2 red copper and the thickness of 2mm by thickness being 2mm carries out diffusion in vacuum and is connected, and workpiece size is 40mm × 80mm.
Concrete technology step is as follows:
(1) front surface cleaning is welded
Adopt No. 150 and No. 280 abrasive paper for metallograph to polish to T2 copper plate and ZA-8 zinc-containing alloy plate welding surface, guarantee the smooth bright and clean of test plate (panel).Adopt acetone to clean test plate (panel) surface, wipe oil and oxide skin, adopt the HCl of 15% to carry out pickling to copper coin, keep 4min, then use alcohol rinse, hair dryer is stand-by after drying, and guarantees that test plate (panel) clean surface is dry.
(2) diffusion in vacuum connects
Copper coin after clean and zinc-containing alloy plate overlap are placed between upper push-down head that diffusion connects, put into the vacuum drying oven of diffusion in vacuum connection device, close fire door.
(3) carry out vacuumizing 15min, vacuum reaches 10
-3pa, open heating schedule, programming rate is 10 DEG C/min, for guaranteeing to be heated evenly, arrange insulation platform at 290 DEG C in temperature-rise period, temperature retention time controls, for 8min, then to continue to be warming up to 380 DEG C, open pressurization protocols, pressure is 3MPa, and the mode of exerting pressure is continuous pressure, guarantees uniform force, insulation 25min, pressure duration controls at 25min.
(4), after diffusion connection completes, remove pressure and adopt recirculated water to cool burner hearth, when vacuum chamber temperature is down to 80 DEG C, welded specimen being taken out.
The diffusion in vacuum method of attachment of above-mentioned copper and zinc-containing alloy, stable technical process, can realize the good diffusion bond of copper and zinc-containing alloy interface, joint welded rate can reach 100%, can meet the instructions for use of engineering field to copper and zinc-containing alloy xenogenesis joint.
Finally should be noted that, the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in previous embodiment, or to wherein partly carrying out equivalent replacement.Although above-mentioned, the specific embodiment of the present invention is described; but not limiting the scope of the invention; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (10)
1. a diffusion in vacuum method of attachment for copper and zinc-containing alloy, is characterized in that, comprising:
Pre-treatment;
The face to be connected of copper material and zinc-containing alloy is fit together, forms contact surface;
Design temperature is heated in vacuum or protective atmosphere;
Under the pressure being not enough to cause plastic deformation and design temperature, make described contact surface in formation or produce solid-state diffusion under not forming liquid phase state and reach connection;
Described design temperature is 325 ~ 380 DEG C.
2. the method for claim 1, is characterized in that, the vacuum of described vacuum condition is 10
-3~ 10
-4pa.
3. the method for claim 1, is characterized in that, described in be not enough to cause the pressure of plastic deformation to be 2 ~ 8MPa.
4. the method for claim 1, is characterized in that, described design temperature is 325 ~ 380 DEG C.
5. the method for claim 1, is characterized in that, after pretreatment, surface smoothness is 3 ~ 6 grades for described copper material or zinc-containing alloy.
6. the method for claim 1, is characterized in that, the described concrete steps being heated to design temperature in vacuum or protective atmosphere are: vacuumize 10 ~ 30min, vacuum reaches 10
-3~ 10
-4pa, open heating schedule, programming rate is 5 ~ 15 DEG C/min, and after being warming up to 280 ~ 310 DEG C, insulation 5 ~ 10min, continues to be warming up to 325 ~ 380 DEG C.
7. the method for claim 1, it is characterized in that, under described pressure being not enough to cause plastic deformation and design temperature, the concrete steps making described contact surface reach connection being formed or produce solid-state diffusion under not forming liquid phase state are: open pressurization protocols, pressure is 2 ~ 8MPa, the mode of exerting pressure is continuous pressure, and insulation 15 ~ 60min, pressure duration controls at 15 ~ 60min.
8. the method for claim 1, is characterized in that, after having connected, removes pressure, cools burner hearth, when fire box temperature is down to below 100 DEG C, is taken out by sample.
9. the method for claim 1, is characterized in that, the chemical composition of described zinc-containing alloy is as follows: Al8.2% ~ 11.5%, Cu0.5% ~ 1.3%, Mg0.02% ~ 0.03%, Fe≤0.035%, Pb≤0.005%, Sn≤0.005%, Cd≤0.001, Zn surplus, in mass fraction.
10. copper-zinc composite component prepared by the method described in any one of claim 1-9.
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|---|---|---|---|
| CN201610066125.3A CN105537756B (en) | 2016-01-29 | 2016-01-29 | A kind of cryogenic vacuum diffusion connection method of copper and zinc-containing alloy |
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|---|---|---|---|
| CN201610066125.3A CN105537756B (en) | 2016-01-29 | 2016-01-29 | A kind of cryogenic vacuum diffusion connection method of copper and zinc-containing alloy |
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| CN105537756B CN105537756B (en) | 2018-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115821397A (en) * | 2022-12-22 | 2023-03-21 | 燕山大学 | Bonded copper single crystal and atomic-scale diffusion bonding process method thereof |
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| CN103077934A (en) * | 2011-10-26 | 2013-05-01 | 株式会社东芝 | Joined structural body of members, joining method of members, and package |
| CN103747913A (en) * | 2011-05-03 | 2014-04-23 | 美铝公司 | Solid state based joining processes with post-weld processing under compression |
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2016
- 2016-01-29 CN CN201610066125.3A patent/CN105537756B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004016384A1 (en) * | 2002-08-16 | 2004-02-26 | New Transducers Limited | Method of bonding a piezoelectric material and a substrate |
| CN102039484A (en) * | 2010-11-30 | 2011-05-04 | 上海工程技术大学 | Low-temperature diffusion welding method for metal materials |
| CN103747913A (en) * | 2011-05-03 | 2014-04-23 | 美铝公司 | Solid state based joining processes with post-weld processing under compression |
| CN103077934A (en) * | 2011-10-26 | 2013-05-01 | 株式会社东芝 | Joined structural body of members, joining method of members, and package |
| CN102732849A (en) * | 2012-06-29 | 2012-10-17 | 武汉理工大学 | Method for surface modification and high strength connection of magnesium alloy and aluminum alloy |
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| CN115821397A (en) * | 2022-12-22 | 2023-03-21 | 燕山大学 | Bonded copper single crystal and atomic-scale diffusion bonding process method thereof |
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