CN109249025A - A kind of aluminum alloy thin wall pieces hot isostatic pressing manufacturing process - Google Patents

A kind of aluminum alloy thin wall pieces hot isostatic pressing manufacturing process Download PDF

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Publication number
CN109249025A
CN109249025A CN201710578517.2A CN201710578517A CN109249025A CN 109249025 A CN109249025 A CN 109249025A CN 201710578517 A CN201710578517 A CN 201710578517A CN 109249025 A CN109249025 A CN 109249025A
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CN
China
Prior art keywords
jacket
mold
aluminum alloy
alloy thin
hot isostatic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710578517.2A
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Chinese (zh)
Inventor
郎利辉
黄西娜
徐文才
季晨昊
孟凡迪
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Beihang University
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Beihang University
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Publication date
Application filed by Beihang University filed Critical Beihang University
Priority to CN201710578517.2A priority Critical patent/CN109249025A/en
Publication of CN109249025A publication Critical patent/CN109249025A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • B22F3/15—Hot isostatic pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses
    • B30B11/002—Isostatic press chambers; Press stands therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • B22F3/15—Hot isostatic pressing
    • B22F2003/153—Hot isostatic pressing apparatus specific to HIP

Abstract

The invention proposes a kind of aluminum alloy thin wall pieces hot isostatic pressing manufacturing process.The preparation of entire manufacturing process process jacket, mold, fixation of the mold in jacket, weld jacket, it hunts leak to jacket, Al alloy powder is packed into jacket, carries out vacuumize process to jacket, the jacket finished will be vacuumized and carry out hot isostatic pressing, mechanical removal jacket is machined outer surface, utilizes the method for artificial removal and sandblasting removal mold.Aluminum alloy thin wall pieces hot isostatic pressing manufacturing process provided by the invention is consolidated, shaped and is densified to Al alloy powder using hot isostatic pressing technique, complex parts inner cavity is constrained using mold simultaneously, to reach the inner cavity using the once-forming complex parts of mold, the shape of jacket uses shape similar with products obtained therefrom, the forming efficiency of part and the utilization rate of Al alloy powder can be improved in this way, the consistency of part is high by 99% or more, and can be had excellent performance and uniform part.

Description

A kind of aluminum alloy thin wall pieces hot isostatic pressing manufacturing process
Technical field
The invention belongs to aviation aerospace manufacturing technology fields, shape more particularly to a kind of aluminum alloy thin wall pieces hot isostatic pressing Method.
Background technique
In recent years, to meet the high performances such as China's unmanned plane, large transport airplane, advanced opportunity of combat, high thrust-weight ratio engine It is required that various functions component need to be usually designed with to the hollow structure of thin-walled gusset, to reach the needs of loss of weight.These zero Part usually has a complex shape, while requiring higher dimensional accuracy and surface quality, this just gives the forming belt of component Very big difficulty is carried out.Traditional forming technology mostly uses the manufacture of seperated metal plate and welding, massive material " integrally emptying " or The method of casting.Using the technique of the manufacture of seperated metal plate plus welding, due to the limitation of aluminium alloy weldability itself, commissure exists More defect, it is difficult to guarantee the quality of part；The mode of " integrally emptying " will increase the mach time, while cause original The significant wastage of material, the method inside of casting haves the defects that much to be difficult to control, it cannot be guaranteed that the forming quality of part.
Hot isostatic pressing technique is the skill that powder sintered and compression process is integrated in one to grow up the 1950s Art.The diffusion connection of the consolidation of dusty material, the densification of casting and different materials is realized at high temperature under high pressure. The technology merges powder sintered and compacting, can guarantee material property while realizing that dusty material densifies entirely Isotropism.It can not aluminum alloy thin wall pieces of the direct forming with complicated inner cavity but simply use hot isostatic pressing technique.
Summary of the invention
To solve the above-mentioned problems, the Powder hot isostatic pressure molding of aluminium alloy thin-walled crossed stiffened plate part provided by the invention Method includes the following steps carried out in order:
1) according to the design processing mold of aluminum alloy thin wall pieces structure, which is an entirety；Aluminum alloy thin wall pieces are whole A cavity shape is controlled by the outer surface of mold.
2) reasonable jacket is processed according to mold shape and the design of aluminum alloy thin wall pieces external surface shape, which includes With the dress top plate in powder hole, side plate 1, side plate 2, side plate 3, side plate 4, bottom plate, aluminum pipe and with the cover plate for vacuumizing hole, for just In welding and saving material, jacket is using profile-followed design.
3) mold moves in the moving process such as welding, transport in order to prevent, designs rigid backing plate and carries out to mold Positioning.
4) according to the materials demand of aluminum alloy thin wall pieces, spherical Al alloy powder is prepared using plasma rotating electrode process (9), and to screen out 100-325 mesh powder spare.
5) pedestal of mold is embedded into rigid backing plate, and is attached with pin, then will have the rigidity of mold Backing plate is embedded into jacket pedestal, and aluminum pipe is inserted into the hole that mold is connected to pedestal, by side plate 1,2,3 and 4 by the two interference fit Respectively in corresponding four slots of insertion jacket bottom plate, top plate is then put, is welded, after welding, is examined using helium mass spectrum Leakage instrument hunts leak to jacket, until jacket air-tightness reaches requirement, the above-mentioned Al alloy powder prepared is then packed into packet In set, make it sufficiently closely knit by the way of mechanical oscillation or artificial vibration.
6) cover plate with vacuum hole is placed on dress powder hole, and sealing is good.
7) the above-mentioned jacket equipped with mold and rigid backing plate is placed in heating furnace and is heated, utilize molecular pump at high temperature Vacuumize process is carried out to jacket inside by vacuum tube, until reaching requirement.
8) above-mentioned evacuated jacket is placed in hot isostatic apparatus, makes spherical aluminium alloy at high temperature under high pressure Powder consolidation forming forms Al alloy powder complex thin-wall structure under the action of inner mould.
9) jacket is removed using the method for machining, the outer surface of aluminum alloy thin wall pieces is processed using machine-tooled method, Thus the semi-finished product of the internal aluminum alloy thin wall pieces structure embedded with mold are obtained.
10) internal mold is removed in the way of artificial removal and sandblasting, final forming has complicated inner cavity structure Aluminum alloy thin wall pieces.
11) mold materials use high purity graphite in the step 1), and are fixed in jacket pedestal by rigid backing plate On.
12) material of jacket is 6061 in the step 2).
13) in the step 5), molecular pump detection is evacuated to 10-12Pa。
14) temperature of heating furnace is 400 DEG C in the step 7) described in；Vacuum degree inside jacket is 10-4Pa。
15) in the step 8), temperature is risen to 470 DEG C, while in phase using increasing temperature and pressure simultaneously by hip treatment With making the internal pressure of hot isostatic apparatus reach 130MPa in the time, heat-insulation pressure keeping 3 hours, furnace temperature is cooled to room later Temperature.
16) aluminum alloy thin wall pieces manufacturing process provided by the invention is using the high temperature and pressure in hot isostatic pressing to aluminium Alloy powder, which carries out consolidation compression moulding, makes its densification, while using the inner cavity of mould constraint aluminum alloy complex thin-wall part, and Outer profile easy to process can be formed by the machining after the profile-followed design and removal jacket of jacket, in this way can be with Achieve the purpose that the near-net-shape of inner cavity one time using mold, can largely save original material, improves part forming efficiency, simultaneously Available excellent in mechanical performance and isotropic nearly full densified part.
Detailed description of the invention
Fig. 1 is the aluminum alloy thin wall pieces schematic diagram formed using the present invention by hot isostatic pressing.
It is used when Fig. 2 is using aluminum alloy thin wall pieces hot isostatic pressing near-net-shape method formation of parts provided by the invention Mold structure diagram.
It is used when Fig. 3 is using aluminum alloy thin wall pieces hot isostatic pressing near-net-shape method formation of parts provided by the invention Wrapping structure schematic diagram
Specific embodiment
With reference to the accompanying drawing with specific embodiment to aluminium alloy thin-walled crossed stiffened plate structure powder heat provided by the invention Equal static pressure near-net-shape method is described in detail.
As shown in Fig. 1-Fig. 3, aluminum alloy thin wall pieces hot isostatic pressing manufacturing process provided by the invention includes carrying out in order Under
Column step:
1) mold as shown in Figure 2 is gone out according to the structural design and processing of aluminum alloy thin wall pieces Fig. 1, which is one whole Body, mold are made of high purity graphite material.
2) reasonable jacket is processed according to mold shape (Fig. 2) and aluminum alloy thin wall pieces external surface shape (Fig. 1) design (Fig. 3), the jacket include top plate (1), side plate 1 (2), side plate 2 (3), side plate 3 (4), side plate 4 (with 4), bottom with dress powder hole Plate (5), aluminum pipe (6) and with the cover plate (8) for vacuumizing hole (7), for convenient for welding and saving material, jacket using setting with the shape Meter.
3) in welding, transport etc., mold is moved in moving process in order to prevent, design rigidity backing plate (9) to mold into Row positioning.
4) according to the materials demand of aluminum alloy thin wall pieces (Fig. 1), spherical aluminum is prepared using plasma rotating electrode process and is closed Bronze end (10), and it is spare to screen out 100-325 mesh powder.
5) pedestal of mold (Fig. 2) is embedded into rigid backing plate (9), and is attached with pin, then will have mould The rigid backing plate of tool is embedded into jacket bottom plate (5), the two interference fit, in the hole that aluminum pipe (6) insertion mold is connected to pedestal, By in side plate 1 (2), 2 (3), 3 (4) and 4 (with 4) respectively corresponding four slots of insertion jacket bottom plate (5), top plate is then put (1), it is welded, after welding, is hunted leak using helium mass spectrometer leak detector to jacket, until jacket air-tightness reaches and wants It asks, then the above-mentioned Al alloy powder (10) prepared is packed into jacket, by the way of mechanical oscillation or artificial vibration Keep it sufficiently closely knit.
6) cover plate (8) with vacuum hole (7) is placed on dress powder hole, and sealing is good.
7) the above-mentioned jacket (9) equipped with mold (Fig. 2) and rigid backing plate is placed in heating furnace and is heated, it is sharp at high temperature Vacuumize process is carried out by the way that vacuum tube (7) are internal to jacket (Fig. 3) with molecular pump, until reaching requirement 10-4Pa。
8) above-mentioned evacuated jacket (Fig. 3) is placed in hot isostatic apparatus, hip treatment is using same When increasing temperature and pressure, temperature is risen to 470 DEG C, while in the same time reach the internal pressure of hot isostatic apparatus Furnace temperature heat-insulation pressure keeping 3 hours, is cooled to room temperature later by 130MPa.At high temperature under high pressure it is consolidated into spherical Al alloy powder Shape is formed Al alloy powder complex thin-wall structure (Fig. 1) under the action of inner mould (Fig. 2).
9) jacket (Fig. 3) is removed using the method for machining, using the outer of machine-tooled method processing aluminum alloy thin wall pieces Thus surface obtains the semi-finished product of the internal aluminum alloy thin wall pieces structure embedded with mold (Fig. 2).
10) internal mold (Fig. 2) is removed in the way of artificial removal and sandblasting, final forming has complicated inner cavity The aluminum alloy thin wall pieces (Fig. 1) of structure.

Claims (6)

1. a kind of aluminum alloy thin wall pieces hot isostatic pressing manufacturing process, it is characterised in that: the aluminum alloy complex thin-wall part structure Hot isostatic pressing manufacturing process follows these steps to carry out:
1) according to the design processing mold (Fig. 2) of aluminum alloy thin wall pieces structure (Fig. 1), which is an entirety；Aluminum alloy thin The entire cavity shape of wall pieces is controlled by the outer surface of mold.
2) reasonable jacket (figure is processed according to mold shape (Fig. 2) and aluminum alloy thin wall pieces external surface shape (Fig. 1) design 3), which includes top plate (1), side plate 1 (2), side plate 2 (3), side plate 3 (4), side plate 4 (with 4), bottom plate with dress powder hole (5), aluminum pipe (6) and with the cover plate (8) for vacuumizing hole (7), for convenient for welding and saving material, jacket using setting with the shape Meter.
3) mold moves in the moving process such as welding, transport in order to prevent, designs rigid backing plate (9) and determines mold Position.
4) according to the materials demand of aluminum alloy thin wall pieces (Fig. 1), spherical Al alloy powder is prepared using plasma rotating electrode process Last (10), and it is spare to screen out 100-325 mesh powder.
5) pedestal of mold (Fig. 2) is embedded into rigid backing plate (9), and is attached with pin, then will have mold Rigid backing plate is embedded into jacket bottom plate (5), the two interference fit, in the hole that aluminum pipe (6) insertion mold is connected to pedestal, by side Plate 1 (2), 2 (3), 3 (4) and 4 (with 4) in corresponding four slots of insertion jacket bottom plate (5), then put top plate (1) respectively, into Row welding, after welding, hunts leak to jacket using helium mass spectrometer leak detector, until jacket air-tightness reaches requirement, then The above-mentioned Al alloy powder (10) prepared is packed into jacket, it is made by the way of mechanical oscillation or artificial vibration sufficiently It is closely knit.
6) cover plate (8) with vacuum hole (7) is placed on dress powder hole, and sealing is good.
7) the above-mentioned jacket (9) equipped with mold (Fig. 2) and rigid backing plate is placed in heating furnace and is heated, utilized divide at high temperature Son pump carries out vacuumize process by the way that vacuum tube (7) are internal to jacket (Fig. 3), until reaching requirement.
8) above-mentioned evacuated jacket (Fig. 3) is placed in hot isostatic apparatus, closes spherical aluminum at high temperature under high pressure Bronze end consolidation is formed Al alloy powder complex thin-wall structure (Fig. 1) under the action of inner mould (Fig. 2).
9) jacket (Fig. 3) is removed using the method for machining, the outer surface of aluminum alloy thin wall pieces is processed using machine-tooled method, Thus the semi-finished product of the internal aluminum alloy thin wall pieces structure (Fig. 1) embedded with mold (Fig. 2) are obtained.
10) internal mold (Fig. 2) is removed in the way of artificial removal and sandblasting, final forming has complicated inner cavity structure Aluminum alloy thin wall pieces (Fig. 1).
2. a kind of aluminum alloy thin wall pieces hot isostatic pressing manufacturing process described in claim 1, it is characterised in that mould in the step 1 Have (1) material and use high purity graphite, and is fixed on jacket pedestal by rigid backing plate.
3. a kind of hot isostatic pressing manufacturing process of aluminium alloy thin-walled structure described in claim 1, it is characterised in that the step (2) material of jacket is 6061 in.
4. a kind of aluminum alloy thin wall pieces hot isostatic pressing manufacturing process described in claim 1, it is characterised in that the step (5) In, molecular pump detection is evacuated to 10-12Pa。
5. a kind of aluminum alloy thin wall pieces hot isostatic pressing manufacturing process according to claim 1, it is characterised in that the step It is rapid 7) in heating furnace temperature be 400 DEG C；The internal vacuum degree of jacket (4) is 10-4Pa。
6. a kind of aluminum alloy thin wall pieces hot isostatic pressing manufacturing process according to claim 1, it is characterised in that the step 8) in, temperature is risen to 470 DEG C, while making hot isostatic pressing in the same time using increasing temperature and pressure simultaneously by hip treatment The internal pressure of equipment reaches 130MPa, and heat-insulation pressure keeping 3 hours, furnace temperature is cooled to room temperature later.
CN201710578517.2A 2017-07-14 2017-07-14 A kind of aluminum alloy thin wall pieces hot isostatic pressing manufacturing process Pending CN109249025A (en)

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Cited By (6)

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Publication number Priority date Publication date Assignee Title
CN110722110A (en) * 2019-09-30 2020-01-24 西安欧中材料科技有限公司 Preparation method for reducing hot isostatic pressing sheath welding seam
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
CN110947970A (en) * 2019-12-05 2020-04-03 中国航发北京航空材料研究院 Near-net forming method for thin-wall complex component
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
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
CN114406261A (en) * 2022-01-14 2022-04-29 大连大学 Sheath die and sheath method for hot isostatic pressing sintering

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CN106111992A (en) * 2016-06-23 2016-11-16 航天材料及工艺研究所 The evenness of wall thickness of a kind of high temperature insostatic pressing (HIP) powder metallurgy thin wall component controls frock and method
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EP2340905A1 (en) * 2009-12-16 2011-07-06 Rolls-Royce plc A method of manufacturing a component
CN103071718A (en) * 2013-02-20 2013-05-01 哈尔滨工业大学（威海） Integral forming process method of thin-wall hooped tube workpieces
CN105220093A (en) * 2014-05-28 2016-01-06 北京有色金属研究总院 A kind of densification method for reaction-injection moulding ultrahigh-strength aluminum alloy material
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110722110A (en) * 2019-09-30 2020-01-24 西安欧中材料科技有限公司 Preparation method for reducing hot isostatic pressing sheath welding seam
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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
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
CN114406261A (en) * 2022-01-14 2022-04-29 大连大学 Sheath die and sheath method for hot isostatic pressing sintering
CN114406261B (en) * 2022-01-14 2024-04-02 大连大学 Sheath die and sheath method for hot isostatic pressing sintering

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Application publication date: 20190122