CN104439238A - High-temperature high-pressure powder near-net forming method of aluminum alloy thin-wall cross-shaped rib plate structure - Google Patents
High-temperature high-pressure powder near-net forming method of aluminum alloy thin-wall cross-shaped rib plate structure Download PDFInfo
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- CN104439238A CN104439238A CN201410809032.6A CN201410809032A CN104439238A CN 104439238 A CN104439238 A CN 104439238A CN 201410809032 A CN201410809032 A CN 201410809032A CN 104439238 A CN104439238 A CN 104439238A
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Abstract
The invention provides a high-temperature high-pressure powder near-net forming method of an aluminum alloy thin-wall cross-shaped rib plate structure. The high-temperature high-pressure powder near-net forming method comprises the steps of manufacturing a die, a sheath and spherical aluminum alloy powder, putting the die and the powder into the sheath, conducting vacuum pumping treatment on the sheath, conducting hot isostatic pressing treatment on the sheath subjected to vacuum pumping treatment, mechanically removing the sheath, adopting mechanical vibration and a manual removal method to remove the inside die and the like. The high-temperature high-pressure powder near-net forming method of the aluminum alloy thin-wall cross-shaped rib plate structure utilizes a hot isostatic pressing technology to solidify, form and compact the aluminum alloy powder and meanwhile utilizes the complicated internal cavity of a die constraint part, an easily-machined external shape is freely formed through the sheath, and accordingly the purpose of utilizing the die to form a complicated surface part in one time is achieved. Therefore, the part forming efficiency and aluminum alloy material utilization rate can be improved, the obtained part is even in performance and excellent in mechanical performance, and the compactness of the part is higher than 99%.
Description
Technical field
The invention belongs to aviation aerospace manufacturing technology field, particularly relate to a kind of powder metallurgy high pressure near-net-shape method of aluminium alloy thin-walled crossed stiffened plate structure.
Background technology
For complying with the development of China's aerospace industries, meet the high performance requirements of China's fighter plane, part is usually designed to the hollow structure with thinner web and higher interior muscle, to reach the needs of loss of weight.This kind of part is generally complex-shaped, and requires that dimensional accuracy is high, internal soundness is stablized, and this brings larger difficulty to the shaping of component.Traditional forming technology many employings split manufactures the method for welding or massive material " entirety is emptied ".Adopt split manufacture to add the technique of welding, due to the restriction of the weldability of aluminium alloy own, there is more defect in commissure, is difficult to the quality ensureing part; The mode of " entirety is emptied ", not only machining time is long, and can cause raw-material a large amount of waste.
Powder metallurgy high-pressure forming technology---hot isostatic pressing technique is that grow up the fifties in last century a kind of integrates the consolidation of powder and the technology of sintering processes.The diffusion realizing the consolidation of dusty material, the densification of foundry goods and different materials at high temperature under high pressure connects.Powder compaction and sintering two procedures are merged into a step by this technology, can realize the densified of 99% of dusty material, and material property keep isotropism.But only use hot isostatic pressing technique but cannot the aluminum alloy part of independent forming thin-walled crossed stiffened plate structure.
Summary of the invention
In order to solve the problem, the Powder hot isostatic pressure forming method of aluminium alloy thin-walled crossed stiffened plate part provided by the invention comprises the following step carried out in order:
1) mould is prepared according to the shape of aluminium alloy thin-walled crossed stiffened plate, this mould has base and four voussoir compositions, to top, surface blending is thinning gradually by bottom for mould, and the cross cavity section of four voussoir formation is the shape of aluminium alloy thin-walled crossed stiffened plate.
2) prepare jacket according to the appearance and size of mould, this jacket comprises cylindrical shell, lower cover and the upper cover plate with vacuum-pumping tube.
3) according to the material requirements of aluminium alloy thin-walled inner cross gusset part, utilize plasma rotating electrode process to prepare spherical aluminum alloy powder, and the powder sieving out 100 ~ 200 order intervals is for subsequent use.
4) mould is loaded inner barrel in base mode down, because mold materials is softer, the mode of manual polishing is adopted to realize closely cooperating of mould and jacket, dislocation in the process be shaped at high temperature insostatic pressing (HIP) to prevent mould and movement, cross die cavity in mould forms the memory space of powder, then the above-mentioned spherical aluminum alloy powder prepared is loaded in cylindrical shell, and make it closely knit by mechanical oscillation or artificial vibration;
5) upper cover plate is placed on cylindrical shell upper port and soldering and sealing is good;
6) the above-mentioned jacket that mould is housed is placed in heating furnace heats, at high temperature utilize the equipment vacuumized to vacuumize process by vacuum tube to jacket inside;
7) the above-mentioned jacket vacuumized is placed in hot isostatic apparatus, makes spherical aluminum alloy powder consolidation at high temperature under high pressure, under the effect of inner mould, form muscle structure in thin-walled cross;
8) method of machining is utilized to remove jacket, and the outer shape of processing parts;
9) utilize the mode of mechanical oscillation and artificial removal to be removed by the mould of inside, final shaping has the aluminum alloy part of muscle in thin-walled cross.
10) in described step 1, the material of mould is high purity graphite;
11) in described step 6, the temperature of heating furnace is 350 DEG C, and the vacuum of jacket inside reaches 10
-6pa;
12) in described step 7, heat and other static pressuring processes parameter is in 1 hour, make the temperature of hot isostatic apparatus to 500 DEG C, and temperature retention time is 2 hours; In 1 hour, make the internal pressure of hot isostatic apparatus reach 120MPa, pressurize simultaneously 2 hours, afterwards by furnace temperature cool to room temperature simultaneously.
13) in aluminium alloy thin-walled cross provided by the invention, muscle mechanism element manufacturing process utilizes hot isostatic pressing technique to carry out consolidation to Al alloy powder to make it densified, utilize inner mould to retrain the shaping of inner complicated gusset simultaneously, the comparatively simple and outer profile that is that be easy to process of part is shaped by jacket and later stage mach mode, the object utilizing the once-forming Complex Surface Part of mould can be reached like this, the forming efficiency of part can be improved, save material, and the mechanical performance of part is excellent, isotropism, density reaches more than 99%.
Accompanying drawing explanation
The mould structure schematic diagram used during Fig. 1 aluminium alloy thin-walled crossed stiffened plate structure high temperature insostatic pressing (HIP) near net shaping method forming part provided by the invention for employing
The wrapping structure schematic diagram used during Fig. 2 aluminium alloy thin-walled crossed stiffened plate structure high temperature insostatic pressing (HIP) near net shaping method forming part provided by the invention for employing.
Fig. 3 is that when adopting aluminium alloy thin-walled crossed stiffened plate structure high temperature insostatic pressing (HIP) near net shaping method forming part provided by the invention, mould embeds the structural representation in jacket.
Fig. 4 is mach semi-finished product schematic diagram during employing aluminium alloy thin-walled crossed stiffened plate structure high temperature insostatic pressing (HIP) near net shaping method forming part provided by the invention
Fig. 5 is mach finished product schematic diagram during employing aluminium alloy thin-walled crossed stiffened plate structure high temperature insostatic pressing (HIP) near net shaping method forming part provided by the invention
Detailed description of the invention
Below in conjunction with accompanying drawing and specific embodiment, aluminium alloy thin-walled crossed stiffened plate structure Powder hot isostatic pressure near-net-shape method provided by the invention is described in detail.
As Figure 1-Figure 5, aluminium alloy thin-walled crossed stiffened plate structure Powder hot isostatic pressure manufacturing process provided by the invention comprises
The following step carried out in order:
1) prepare mould 1 as shown in Figure 1 according to the structure of thin-walled crossed stiffened plate part, this mould forms the die cavity of crossed stiffened plate by four pieces of wedge shape modules 2, and four pieces of wedge shape modules are connected with cup dolly 3; The outer surface of wedge shape module forms the external surface shape of inner chamber, and cross die cavity forms thin-wall aluminum alloy crossed stiffened plate; Mould 1 adopts high purity graphite material to make.
1) according to the shape of mould 1 and the appearance and size of part 10, jacket 4 is as shown in Figure 2 prepared.This jacket comprises cylindrical shell 5, lower cover 6 and the upper cover plate 8 with vacuum-pumping tube 7, and during for preventing from being wrapped in high temperature insostatic pressing (HIP), side leakage occurs and convenient welding, jacket upper and lower cover plates is designed to u shape; Jacket adopts commercial-purity aluminium material to make; The height of jacket and the distance size between jacket and mould are determined according to the thickness of the Al alloy powder last layer of required filling.
2) according to the demand of aluminium alloy thin-walled crossed stiffened plate constitutional detail, utilize plasma rotating electrode process to prepare aluminium alloy 2A12 powder 9, and it is for subsequent use to sieve out 100-200 object powder.
3) base 3 of mould 1 is embedded in jacket cylindrical shell, and contact with lower cover 6, because mold materials is softer, just the interference fit of mould and jacket cylindrical shell 5 can be realized by the pattern of manual polishing, the above-mentioned Al alloy powder 9 prepared is loaded in jacket, adopts the mode of mechanical oscillation or artificial vibration to make it fully closely knit; Use the object of spherical aluminum alloy powder 9 to be make it easy to flowing, fully can load the narrow slit structure of mould 1.
4) upper cover plate 8 of u shape structure with vacuum-pumping tube 7 is embedded in jacket cylindrical shell, and sealing is good, as shown in Figure 3.
5) the above-mentioned jacket 4 that mould 1 is housed is placed in heating furnace, the temperature of heating furnace is 350 DEG C, and then at high temperature utilize vacuum-pumping tube 7 pairs of jackets 4 to vacuumize process by vacuum equipment, the vacuum of jacket inside reaches 10
-6pa.
6) the above-mentioned jacket 4 that vacuumized is placed in hot isostatic apparatus and carries out hip treatment, the condition of hip treatment is make the temperature of hot isostatic apparatus to 500 DEG C in 1 hour, and temperature retention time is 2 hours; In 1 hour, make the internal pressure of hot isostatic apparatus reach 120MPa, pressurize simultaneously 2 hours simultaneously, afterwards by furnace temperature cool to room temperature, form overall aluminium alloy thin-walled crossed stiffened plate structure 11 to make spherical aluminum alloy powder consolidation.
7) utilize the method for machining to remove jacket 4, then by the external morphology of the method processing parts of overall machining, obtain aluminium alloy thin-walled crossed stiffened plate structure semi-finished product 10; Inner mould 1 is removed by the mode of mechanical oscillation or manual polishing, obtains final aluminium alloy thin-walled crossed stiffened plate structure processed finished products 11.
8) according to the difference of formed aluminium alloy thin-walled crossed stiffened plate part 11 structure and cavity shape, the shape of mould 1 is also different, and the treatment conditions of high temperature insostatic pressing (HIP) adjust accordingly by according to the shape of powder 9 raw material and part 11.
Claims (5)
1. a powder metallurgy high pressure near-net-shape method for aluminium alloy thin-walled crossed stiffened plate structure, is characterized in that: described aluminium alloy thin-walled crossed stiffened plate structure powder metallurgy high pressure near-net-shape method comprises the following step carried out in order:
1) mould (1) is prepared according to the shape of aluminium alloy thin-walled crossed stiffened plate structure (11), this mould forms the die cavity of crossed stiffened plate by four pieces of wedge shape modules (2), and four pieces of wedge shape modules (2) are connected with cup dolly (3); The outer surface of wedge shape module forms the external surface shape of inner chamber, and cross die cavity forms thin-wall aluminum alloy crossed stiffened plate;
2) jacket is prepared according to the shape of mould (1) and aluminium alloy thin-walled crossed stiffened plate constitutional detail (11), this jacket comprises cylindrical shell (5), lower cover (6) and the upper cover plate (8) with vacuum-pumping tube (7), during for preventing from being wrapped in high temperature insostatic pressing (HIP), side leakage occurs and convenient welding, jacket upper and lower cover plates (8) is designed to u shape; Wherein lower cover (6) is arranged on the lower end of cylindrical shell (5).
3) according to the materials demand of aluminium alloy thin-walled crossed stiffened plate constitutional detail (10), utilize plasma rotating electrode process to prepare spherical aluminum alloy powder (9), and it is for subsequent use to sieve out 100-200 object powder.
4) base (3) of mould (1) is embedded in jacket cylindrical shell (5), and contact with lower cover (6), the above-mentioned Al alloy powder (9) prepared is loaded in jacket, adopts the mode of mechanical oscillation or artificial vibration to make it fully closely knit
5) u shape structure upper cover plate (8) will be had be embedded in cylindrical shell (5), and sealing is good.
6) the above-mentioned jacket (4) that mould (1) is housed is placed in heating furnace heats, at high temperature utilize the equipment vacuumized to vacuumize process by vacuum tube (7) to jacket (4) inside.
7) the above-mentioned jacket (4) vacuumized is placed in hot isostatic apparatus, make spherical aluminum alloy powder consolidation at high temperature under high pressure, under the effect of inner mould (1), form muscle structure (11) in Al alloy powder thin-walled cross.
8) method of machining is utilized to remove jacket (4), utilize conventional machine-tooled method to process the outer shape of muscle structure (11) in Al alloy powder thin-walled cross, obtain the semi-finished product (10) that inside is embedded with the aluminium alloy thin-walled crossed stiffened plate structure (11) of mould (1) thus.
9) utilize the mode of mechanical oscillation and artificial removal to be removed by the mould (1) of inside, final shaping has the aluminum alloy part (11) of muscle in thin-walled cross.
2. the Powder hot isostatic pressure near-net-shape method of a kind of aluminium alloy thin-walled crossed stiffened plate structure according to claim 1, it is characterized in that in described step 1, mould (1) material adopts high purity graphite, is embedded into graphite jig in jacket cylindrical shell (5) by the mode of manual polishing.
3. the Powder hot isostatic pressure near-net-shape method of a kind of aluminium alloy thin-walled crossed stiffened plate structure according to claim 1, is characterized in that the material of jacket (4) in described step 2 is commercial-purity aluminium 1060.
4. the Powder hot isostatic pressure near-net-shape method of a kind of aluminium alloy thin-walled crossed stiffened plate structure according to claim 1, is characterized in that described step 6) in the temperature of heating furnace be 350 DEG C; The vacuum of jacket (4) inside is 10
-6pa.
5. the Powder hot isostatic pressure near-net-shape method of a kind of aluminium alloy thin-walled crossed stiffened plate structure according to claim 1, it is characterized in that described step 7) hip treatment condition makes the temperature of hot isostatic apparatus to 500 DEG C in 1 hour, and temperature retention time is 2 hours; In 1 hour, make the internal pressure of hot isostatic apparatus reach 120MPa, pressurize simultaneously 2 hours, afterwards by furnace temperature cool to room temperature simultaneously.
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| CN201410809032.6A CN104439238A (en) | 2014-12-16 | 2014-12-23 | High-temperature high-pressure powder near-net forming method of aluminum alloy thin-wall cross-shaped rib plate structure |
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| CN201410809032.6A CN104439238A (en) | 2014-12-16 | 2014-12-23 | High-temperature high-pressure powder near-net forming method of aluminum alloy thin-wall cross-shaped rib plate structure |
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| CN105665729A (en) * | 2016-04-11 | 2016-06-15 | 西安欧中材料科技有限公司 | High-density Ti2AlNb powder alloy near-net forming technology |
| CN107983961A (en) * | 2017-09-14 | 2018-05-04 | 北京航空航天大学 | A kind of titanium alloy cylinder locking-type folding system high temperature insostatic pressing (HIP) manufacturing process |
| CN108580906A (en) * | 2018-05-23 | 2018-09-28 | 成都飞机工业（集团）有限责任公司 | A kind of Thin-wall Aluminum Parts Methods of Surface Quality Control |
| CN108889958A (en) * | 2018-08-29 | 2018-11-27 | 北京航空航天大学 | A kind of titanium alloy supporting structure integral forming method |
| CN108971495A (en) * | 2018-08-08 | 2018-12-11 | 北京航空航天大学 | A kind of titanium alloy cylinder hemisphere hot isostatic pressing manufacturing process |
| CN109079141A (en) * | 2018-08-31 | 2018-12-25 | 航天材料及工艺研究所 | A kind of outer jacket and method for eliminating bead structures dimensional discrepancy in powder metallurgy component |
| CN109249025A (en) * | 2017-07-14 | 2019-01-22 | 北京航空航天大学 | A kind of aluminum alloy thin wall pieces hot isostatic pressing manufacturing process |
| CN109562449A (en) * | 2016-04-29 | 2019-04-02 | 高级交互材料科学有限公司 | Appearance holder for hot isostatic pressing and vacuum degasser |
| CN110756808A (en) * | 2019-12-13 | 2020-02-07 | 哈尔滨工业大学 | Powder increment sintering forming method for complex closed hollow thin-wall part |
| CN111266588A (en) * | 2020-02-18 | 2020-06-12 | 中国地质大学（北京） | Hot isostatic pressing shape control method for titanium alloy thin-walled part |
| CN112893849A (en) * | 2021-01-18 | 2021-06-04 | 北京航空航天大学 | Powder-solid coupling forming device and method for multiple layers of ribs in thin-wall part |
| CN112916855A (en) * | 2021-01-25 | 2021-06-08 | 北京航空航天大学 | Hot isostatic pressing accurate forming method for complex thin-wall rib structure |
| CN114433842A (en) * | 2022-03-03 | 2022-05-06 | 宁波江丰热等静压技术有限公司 | Sheath for hot isostatic pressing |
| CN117532001A (en) * | 2024-01-04 | 2024-02-09 | 西安欧中材料科技有限公司 | Double-inner-cavity warhead shell and rapid preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105665729A (en) * | 2016-04-11 | 2016-06-15 | 西安欧中材料科技有限公司 | High-density Ti2AlNb powder alloy near-net forming technology |
| CN109562449A (en) * | 2016-04-29 | 2019-04-02 | 高级交互材料科学有限公司 | Appearance holder for hot isostatic pressing and vacuum degasser |
| CN109249025A (en) * | 2017-07-14 | 2019-01-22 | 北京航空航天大学 | A kind of aluminum alloy thin wall pieces hot isostatic pressing manufacturing process |
| CN107983961A (en) * | 2017-09-14 | 2018-05-04 | 北京航空航天大学 | A kind of titanium alloy cylinder locking-type folding system high temperature insostatic pressing (HIP) manufacturing process |
| CN108580906A (en) * | 2018-05-23 | 2018-09-28 | 成都飞机工业（集团）有限责任公司 | A kind of Thin-wall Aluminum Parts Methods of Surface Quality Control |
| CN108971495B (en) * | 2018-08-08 | 2021-01-19 | 北京航空航天大学 | Hot isostatic pressing forming method for hemispheres of titanium alloy gas cylinders |
| CN108971495A (en) * | 2018-08-08 | 2018-12-11 | 北京航空航天大学 | A kind of titanium alloy cylinder hemisphere hot isostatic pressing manufacturing process |
| CN108889958A (en) * | 2018-08-29 | 2018-11-27 | 北京航空航天大学 | A kind of titanium alloy supporting structure integral forming method |
| CN109079141A (en) * | 2018-08-31 | 2018-12-25 | 航天材料及工艺研究所 | A kind of outer jacket and method for eliminating bead structures dimensional discrepancy in powder metallurgy component |
| CN110756808A (en) * | 2019-12-13 | 2020-02-07 | 哈尔滨工业大学 | Powder increment sintering forming method for complex closed hollow thin-wall part |
| CN110756808B (en) * | 2019-12-13 | 2021-09-28 | 哈尔滨工业大学 | Powder increment sintering forming method for complex closed hollow thin-wall part |
| CN111266588A (en) * | 2020-02-18 | 2020-06-12 | 中国地质大学（北京） | Hot isostatic pressing shape control method for titanium alloy thin-walled part |
| CN112893849A (en) * | 2021-01-18 | 2021-06-04 | 北京航空航天大学 | Powder-solid coupling forming device and method for multiple layers of ribs in thin-wall part |
| CN112916855A (en) * | 2021-01-25 | 2021-06-08 | 北京航空航天大学 | Hot isostatic pressing accurate forming method for complex thin-wall rib structure |
| CN114433842A (en) * | 2022-03-03 | 2022-05-06 | 宁波江丰热等静压技术有限公司 | Sheath for hot isostatic pressing |
| CN117532001A (en) * | 2024-01-04 | 2024-02-09 | 西安欧中材料科技有限公司 | Double-inner-cavity warhead shell and rapid preparation method thereof |
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Application publication date: 20150325 |