CN1297384C - Method for manufacturing superplastic forming and diffuse bonding magnet alloy product - Google Patents
Method for manufacturing superplastic forming and diffuse bonding magnet alloy product Download PDFInfo
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- CN1297384C CN1297384C CNB2004100441759A CN200410044175A CN1297384C CN 1297384 C CN1297384 C CN 1297384C CN B2004100441759 A CNB2004100441759 A CN B2004100441759A CN 200410044175 A CN200410044175 A CN 200410044175A CN 1297384 C CN1297384 C CN 1297384C
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Abstract
The present invention discloses a method for manufacturing superplastic formed and diffusion connected magnesium alloy products, which relates to a method for manufacturing superplastic formed and diffusion connected magnesium alloy products. The present invention is realized by that the connecting surfaces of two pieces or more than two pieces of magnesium alloy plates are chemically washed so as to remove oxide films on the surfaces of the plates; gasifying agents are put between every two plates; the plates clamped with the gasifying agents are put into moulds, subsequently, the plates are heated to the superplastic forming temperature of magnesium alloy and are pressurized simultaneously so that an upper mould, a lower mould and the plates are in close contact, the pressure of 1 to 10MPa is applied, and heat is preserved for 30 to 90 minutes; the pressure is increased to 15 to 50MPa, pressure maintaining time is 1 to 24 hours, and finally, a finished product is formed after cooling demoulding. The method of the present invention integrates the advantages of superplastic formation and diffusion connection so that components can form integral components by one-time formation. The present invention has the advantages of good formability, precise formation, no rebound, no residual stress, high utilization rate of materials, etc.
Description
Technical field:
The present invention relates to the method that a kind of manufacturing superplastic formation and diffusion connect the magnesium alloy product of (SPF/DB).
Background technology:
The temperature that the superplastic formation that the SPF/DB combination process is meant material is connected with diffusion is in same temperature range, thereby can carry out moulding and constitute SPF/DB technology with being connected to put together, it is under the superplastic forming temperature of material, and two layers or multilayer sheet material obtains the method for integral joint.The SPF/DB technology can mold complex-shaped one-piece parts, is alleviating construction weight, and the aspect that reduces production costs has great superiority.What the SPF/DB technology was successful is applied in aluminium alloy, the titanium alloy member.Magnesium and alloy thereof are present the lightest applicable structural materials, it has aluminium alloy and the irreplaceable performance of titanium alloy, as characteristics such as high specific strength, height ratio elastic modelling quantity, high damping shock absorption, high-termal conductivity, the worn-out property of high electrostatic sheild, high machining property, dimensional stability and density are little.Because the close-packed hexagonal crystal structure of magnesium alloy causes the processability under its room temperature poor, is restricting the development of magnesium alloy sheet moulding.Therefore, the research of wrought magnesium alloy and mouldability thereof is the hot research problem of magnesium alloy development.
Summary of the invention:
The purpose of this invention is to provide a kind of good moldability, moulding and make the method for the magnesium alloy product of superplastic formation and diffusion connection accurately, this method is applied to the magnesium alloy materials field with the SPF/DB forming method, can produce magnesium alloy hollow thin-wall structural member.The present invention makes magnesium alloy product that superplastic formation and diffusion connect: a like this, Chemical cleaning is carried out on two or more than two the connection surface of magnesium alloy plate, removes the oxide-film of plate surface; B, this gasifying agent carbonate is put between sheet material and the sheet material; C, the plate that will accompany gasifying agent are packed in the mould, subsequently plate is heated to 300～400 ℃ of the superplastic formation temperature of magnesium alloy, pressurization simultaneously makes between upper and lower mould and the plate and closely contacts, and forms an enclosure space, exerting pressure is 1～10MPa, is incubated 30～90 minutes; D, increase pressure to 15～50MPa, the dwell time is 1～24 hour, forms the part identical with die face, after cooling and demolding finished product.The present invention utilizes magnesium alloy at high temperature to have this character of superplasticity, utilize the SPF/DB forming method to produce magnesium alloy ripple part, with superplastic formation and welding shaping method combination, make the part can the one-shot forming one-piece parts, reduce part and frock quantity, shorten the manufacturing cycle, reduce production costs, alleviate construction weight greatly, be fit to make the manufacture method of hollow thin-wall structural member, and the magnesium alloy parts processability that the SPF/DB method is made is good, can weight reduction 30～70%, (temperature under suitable condition of contact, time, pressure etc.), strength of joint can reach more than 80% of strength of parent.SPF/DB combined method of the present invention rolls into one superplastic formation with the advantage that diffusion is connected, make the part can the once-forming one-piece parts, have good moldability, moulding accurately, do not have resilience, no residual stress, a stock utilization advantages of higher, can produce and have complicated overall structure part, can eliminate or reduce hole, bolt, rivet and weld seam, reduce assembly cost, reduce material consumption, alleviate pts wt, obtain bigger benefit.
Description of drawings:
Fig. 1 is that the present invention places the gasifying agent schematic diagram, Fig. 2 is the structural representation of heating pressure process, Fig. 3 is that gasifying agent decomposes the structural representation that makes plate superplastic formation/diffusion connection procedure, Fig. 4 is a magnesium alloy ripple part schematic diagram, and wherein a1 is that plate is long, and b1 is that plate is wide, a2 is that the ripple part is long, b2 is the ripple spacing, and b3 is that a ripple is wide, and r is a ripple garden angular radius.
The specific embodiment:
The specific embodiment one: present embodiment is to make magnesium alloy product that superplastic formation and diffusion connect like this: a, preparation sheet material: Chemical cleaning is carried out on two or more than two the connection surface of magnesium alloy plate, remove the oxide-film of plate surface, make it expose unsalted surface, to increase contact area, make joint quality reach better; B, preparation gasifying agent: chemical reaction takes place in this gasifying agent near magnesium alloy superplasticity temperature, simultaneously in the product with a large amount of gas, in the space of sealing, produce very high interior pressure, utilize this air pressure to carry out superplastic formation, this gasifying agent is a solid matter, and this gasifying agent is put between two sheet materials; C, heating, pressure process: the plate that will have a gasifying agent is packed in the mould, described mould is made up of patrix 4 and counterdie 5, form by three disjunct die cavities in patrix 4 and counterdie 5 moulds, subsequently plate is heated to 300～400 ℃ of the superplastic formation temperature of magnesium alloy, pressurization simultaneously makes between upper and lower mould and the plate and closely contacts, form an enclosure space, exerting pressure is 1～10MPa, is incubated 30～90 minutes; D, forming process: pressurize continuously, especially the temperature range that reacts at gas-forming agent, make plate in mold cavity, make the connection surface of two boards material superplastic formation the time, keep the sufficiently long time down for 300～400 ℃ in the superplastic formation temperature, guarantee the phase counterdiffusion between the interface, final arrival firm connection fully, make plate progressively be fitted in the surface of mold cavity, until complete mold filling, form the part identical with die face, after cooling and demolding finished product, increase pressure to 15～50MPa in the above-mentioned forming process, the dwell time is 1～24 hour.Described gasifying agent is a carbonate.
The specific embodiment two: the plate of present embodiment adopts the thick Mg-Zn-Zr thin plate 1 and 2 of 1.2mm.A, Chemical cleaning is carried out on the connection surface of two boards material, remove the oxide-film and the pollutant of plate surface,, make it expose unsalted surface,, make joint form firm connection to increase contact area as oil, rust, dirt etc.; B, 3g gasifying agent 3 is placed on three positions between two sheet materials, as shown in Figure 1; C, pack in patrix 4 and the counterdie 5 accompanying the plate 1 of gasifying agent 3 and plate 2, heating pressure process is to carry out in the superplastic formation machine, as shown in Figure 2, plate is heated to 350 ℃ of the superplastic formation temperature of magnesium alloy, exert pressure simultaneously and be 10MPa, make patrix 4, closely contact between counterdie 5 and plate 1 and the plate 2, form an enclosure space, as shown in Figure 3, this enclosure space that forms can make the certain air pressure of gas 6 generations of gasifying agent decomposition carry out superplastic formation on the one hand, this enclosure space of Xing Chenging can prevent that Mg alloy surface is oxidized in the diffusion connection procedure on the other hand, and temperature retention time is 45 minutes; D, continuation is forced into 15MPa to mould, especially the temperature range that reacts at gas-forming agent, make plate in mold cavity superplastic formation the time, the connection surface of two boards material is kept enough big pressure and diffusion time down for 350 ℃ in the superplastic formation temperature, guarantee the phase counterdiffusion between the interface, final arrival firm connection fully, make plate progressively be fitted in the surface of mold cavity, until complete mold filling, form the part identical, as shown in Figure 4, remove pressure at last with die face, it is good promptly to obtain moulding through cooling and demolding, the quality of diffusion jointing is the finished product of strength of parent 94%, and the dwell time is 1 hour in the above-mentioned forming process.
The specific embodiment three: the plate of present embodiment adopts the thick Mg-Zn-Zr thin plate 1 and 2 of 0.8mm.A, Chemical cleaning is carried out on the connection surface of two boards material, remove the oxide-film and the pollutant of plate surface,, make it expose unsalted surface,, make joint form firm connection to increase contact area as oil, rust, dirt etc.; B, 3g gasifying agent 3 is placed on three positions between two sheet materials, as shown in Figure 1; C, the plate 1 and 2 that accompanies gasifying agent 3 is packed in upper mould 4 and the counterdie 5, heating pressure process is to carry out in the superplastic formation machine, as shown in Figure 2, subsequently plate is heated to 300 ℃ of the superplastic formation temperature of magnesium alloy, exert pressure simultaneously and be 10MPa, make patrix 4, closely contact between counterdie 5 and the plate, form an enclosure space, as shown in Figure 3, this enclosure space that forms can make the certain air pressure of gas 6 generations of gasifying agent decomposition carry out superplastic formation on the one hand, this enclosure space of Xing Chenging can prevent that Mg alloy surface is oxidized in the diffusion connection procedure on the other hand, and temperature retention time is 60 minutes; D, continuation is forced into 20MPa to mould, especially the temperature range that reacts at gas-forming agent, make plate in mold cavity, make the connection surface of two boards material superplastic formation the time, keep enough big pressure and diffusion time down for 300 ℃ in the superplastic formation temperature, guarantee the phase counterdiffusion between the interface, final arrival firm connection fully, make plate progressively be fitted in the surface of mold cavity, until complete mold filling, form the part identical, as shown in Figure 4, remove pressure at last with die face, it is good promptly to obtain moulding through cooling and demolding, the quality of diffusion jointing is the finished product of strength of parent 86%, and the dwell time is 1 hour in the above-mentioned forming process.
Claims (1)
1, makes the method for the magnesium alloy product of superplastic formation and diffusion connection, it is characterized in that it is to make magnesium alloy product that superplastic formation and diffusion connect: a like this, Chemical cleaning is carried out on two or more than two the connection surface of magnesium alloy plate, removes the oxide-film of plate surface; B, gasifying agent carbonate is put between sheet material and the sheet material; C, the plate that will accompany gasifying agent are packed in the mould, subsequently plate is heated to 300～400 ℃ of the superplastic formation temperature of magnesium alloy, pressurization simultaneously makes between upper and lower mould and the plate and closely contacts, and forms an enclosure space, exerting pressure is 1～10MPa, is incubated 30～90 minutes; D, increase pressure to 15～50MPa, the dwell time is 1～24 hour, forms the part identical with die face, after cooling and demolding finished product.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100441759A CN1297384C (en) | 2004-12-28 | 2004-12-28 | Method for manufacturing superplastic forming and diffuse bonding magnet alloy product |
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| CNB2004100441759A CN1297384C (en) | 2004-12-28 | 2004-12-28 | Method for manufacturing superplastic forming and diffuse bonding magnet alloy product |
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| CN1631567A CN1631567A (en) | 2005-06-29 |
| CN1297384C true CN1297384C (en) | 2007-01-31 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100462196C (en) * | 2006-02-27 | 2009-02-18 | 北京亚太空间钛业有限公司 | Laminated titanium-alloy thin-plate assembled connecting method |
| CN101891482B (en) * | 2010-04-29 | 2012-09-12 | 哈尔滨工业大学 | Method for manufacturing superplastic forming ceramic thin-wall product |
| CN106363375B (en) * | 2016-08-26 | 2018-07-13 | 北京普惠三航科技有限公司 | A method of manufacture lattice fin rudder |
| CN109226953B (en) * | 2018-10-19 | 2021-04-02 | 西北工业大学 | Annular structural member non-limiting diffusion connection method |
| CN110802190B (en) * | 2019-11-18 | 2020-12-29 | 燕山大学 | Magnesium alloy part warm-hot forming method based on diffusion bonding |
| CN112620914B (en) * | 2020-11-30 | 2022-07-01 | 哈尔滨工业大学 | Aluminum alloy synchronous superplastic forming diffusion bonding method |
| CN114570833A (en) * | 2020-12-01 | 2022-06-03 | 贾雅铭 | Metal sheet thermal forming die and method, ship hull and ship with ship hull |
| CN112719081B (en) * | 2020-12-25 | 2022-11-08 | 南阳师范学院 | Current-assisted SPF/DB integrated forming process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3927817A (en) * | 1974-10-03 | 1975-12-23 | Rockwell International Corp | Method for making metallic sandwich structures |
| US4220276A (en) * | 1978-08-25 | 1980-09-02 | Rockwell International Corporation | Method for fabricating superplastically formed/diffusion bonded structures |
| CN1043894A (en) * | 1988-12-27 | 1990-07-18 | 巴恩斯集团公司 | Make the method and the goods thereof of the goods of superplastic formation and diffusion bond |
| US5484977A (en) * | 1991-06-04 | 1996-01-16 | Rolls-Royce, Plc | Method of manufacturing an article by superplastic forming and diffusion bonding and vacuum chamber for use in processing workpieces for superplastic forming and diffusion bonding |
| CN1037250C (en) * | 1991-07-25 | 1998-02-04 | 万通运动器材工业股份有限公司 | Composite component mfg. method |
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- 2004-12-28 CN CNB2004100441759A patent/CN1297384C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3927817A (en) * | 1974-10-03 | 1975-12-23 | Rockwell International Corp | Method for making metallic sandwich structures |
| US4220276A (en) * | 1978-08-25 | 1980-09-02 | Rockwell International Corporation | Method for fabricating superplastically formed/diffusion bonded structures |
| CN1043894A (en) * | 1988-12-27 | 1990-07-18 | 巴恩斯集团公司 | Make the method and the goods thereof of the goods of superplastic formation and diffusion bond |
| US5484977A (en) * | 1991-06-04 | 1996-01-16 | Rolls-Royce, Plc | Method of manufacturing an article by superplastic forming and diffusion bonding and vacuum chamber for use in processing workpieces for superplastic forming and diffusion bonding |
| CN1037250C (en) * | 1991-07-25 | 1998-02-04 | 万通运动器材工业股份有限公司 | Composite component mfg. method |
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