CN202684050U - Vacuum pressure infiltration device for continuously preparing magnesium-based composite material irregular part - Google Patents
Vacuum pressure infiltration device for continuously preparing magnesium-based composite material irregular part Download PDFInfo
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- CN202684050U CN202684050U CN 201220322012 CN201220322012U CN202684050U CN 202684050 U CN202684050 U CN 202684050U CN 201220322012 CN201220322012 CN 201220322012 CN 201220322012 U CN201220322012 U CN 201220322012U CN 202684050 U CN202684050 U CN 202684050U
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Abstract
The utility model relates to a vacuum pressure infiltration device for continuously preparing a magnesium-based composite material irregular part. In the preparation device, the bottoms of an extrusion container and a forming die are sealed by an ejector rod; an upper port of the extrusion container is sealed by a graphite block to form a sealed die cavity; the melting device is communicated with the die cavity of the extrusion device through a pipeline and a valve; and the melting device is connected with an argon gas bottle through a valve. A liquid inlet can be communicated with a liquid feeding pipe by turning the ejector rod to realize quantitative pouring of magnesium alloy. The forming method is as follows: first, preparing a reinforced carbon fiber preform, placing the reinforced preform into the die, casting magnesium alloy into the die and performing pressure infiltration, and applying mechanical loading to compact the die. The forming method has the advantages of few operation steps, short technical flow, and high product quality, and can be processed by the universal press device. The vacuum pressure infiltration device can solve the problems that during the preparation process of the magnesium-based composite material and the irregular part thereof by the existing vacuum pressure infiltration method, the infiltration load is not enough, the near-net forming and continuous forming are difficult.
Description
Technical field
The present invention relates to a kind of device for preparing the magnesium base composite material profiled piece.
Background technology
Magnesium base composite material has low-density, high specific strength, high ratio modulus, the damping vibration attenuation performance of excellence and the low characteristics such as thermal coefficient of expansion, be a kind of lightweight, high performance structural material, have broad application prospects in fields such as Aeronautics and Astronautics, automobile and electronics industries.
The vacuum pressure infiltration method is the common method of preparation magnesium base composite material profiled piece.At present, the vacuum pressure infiltration fado adopts gas pressure as infiltration load, and for non-wetting wild phase/matrix system, required critical infiltration pressure is larger, and infiltration is difficult to carry out.In addition, the size of preparation composite is subject to the restriction of vacuum tank, and is difficult to realize the continuous production of composite.Find by literature search, Chinese patent application number: 200810064995.2, denomination of invention: " a kind of method of preparing metal-matrix composite by vacuum pressure infiltration ", referring to Fig. 2, the method is low for vacuum pressure method of impregnation operating pressure, the problem of investment goods costliness, complex process, propose a kind of scheme of mechanical load infiltration load, infiltration load can be used for the excessive metal-base composites of critical infiltration pressure that the gas pressure infiltration method can't prepare between 0.1MPa-200MPa.Its basic process is as follows: at first precast body 5 and the metal alloy 13 of metal-base composites are put in the finishing die 6, then vacuumize, and be heated to more than the melting point metal alloy temperature in the vacuum tank 24 and insulation, after metal alloy 13 fusings of finishing die 6 inside, primer fluid compressing cylinder 1 promotes punch 2 enters in the finishing die 6 graphite block 3, molten metal infiltrates under the pressure-acting of graphite block 3 to precast body 5, treat that vacuum tank 24 interior temperature are reduced to room temperature, finishing die 6 is taken out, utilize method for turning that composite is taken out.
This technology can provide larger infiltration load, but still exists following problem to need to improve: the one, and composite can take out by the mode of turning after temperature was reduced to room temperature in the vacuum tank, still can not realize the continuous production of composite; The 2nd, be difficult to the near-net-shape composite product, the composite that only can prepare simple shape is cylindrical; The 3rd, the size of formed composite material still is subject to the restriction of vacuum tank.
Summary of the invention
The technical problem that solves
For fear of the deficiencies in the prior art part, the present invention proposes a kind of device of magnesium base composite material profiled piece vacuum pressure infiltration continuous production, overcomes existing vacuum pressure infiltration technical equipment and requires high, as to be difficult to progressive forming and near-net-shape magnesium base composite material abnormity product deficiency.This device carries out densified four steps of magnesium alloy smelting, quantitative pouring, gas pressure infiltration and liquid-solid attitude in a complete hermetic device, can one time near-net-shape magnesium base composite material and profiled piece thereof, can be according to the corresponding mould of product size design, and realize the continuous production of magnesium base composite material.
Technical scheme
A kind of device of magnesium base composite material profiled piece vacuum pressure infiltration continuous production is characterized in that comprising extrusion die, melting kettle 12, resistance heater 11, feed tube 10 and air pressure running gate system; Described extrusion die comprises elema heater 7, punch 2, graphite block 3, recipient 4, finishing die 6, base 8 and push rod 9; Described pressure pouring system comprises argon bottle 15, vavuum pump 23, venting valve 14, air intake valve 16, valve 22, vacuumizes by-pass valve control 22 and connecting line; Recipient 4 is fixed on the base 8, and is placed on simultaneously in the elema heater 7; Finishing die 6 is positioned at recipient 4 bottoms, adopts matched in clearance with recipient 4; Place the graphite block 3 with boss structure in recipient 4 upper port, graphite block forms interference fit with adopting between the recipient 4; The center of base 8 is a through hole, and the diameter of through hole is provided with in the through hole and can rotates and up and down push rod 9 less than the internal diameter of recipient 4; The upper end of push rod 9 is provided with cone tank, and the bottom of groove is provided with through hole 9-1 that are communicated with push rod 9 outsides, and this through hole is by feed tube 10 and melting kettle 12 internal communication; Melting crucible 12 upper ends are crucible cover 18 and seal washer 19 fixedly, and melting crucible 12 is placed in the resistance heater 11; Vavuum pump 23 is connected in recipient 4 and the melting crucible 12 by pipeline, and the pipeline between vavuum pump 23 and the recipient 4 is provided with and vacuumizes by-pass valve control 22, and the pipeline between vavuum pump 23 and the melting crucible 12 is provided with valve 21; Gas cylinder 15 is connected in the melting crucible 12 by pipeline, and the pipeline between gas cylinder 15 and the melting crucible 12 is provided with air intake valve 16, passes through tubes rows air valve 14 in the melting crucible 12.
Beneficial effect
The device of a kind of magnesium base composite material profiled piece vacuum pressure infiltration continuous production that the present invention proposes, compared with prior art, the present invention prepares the required magnesium alloy smelting of magnesium base composite material method, quantitative pouring, gas pressure infiltration, densified four steps of liquid-solid attitude and once finishes in a complete hermetic device.Realize the quantitative pouring of liquid magnesium alloy by the rotation of push rod 9, and enforcement gas pressure infiltration under gas pressure, subsequently by the fine and close defective of not infiltrating of eliminating of the pressurization of liquid-solid attitude, high performance magnesium base composite material is shaped, reach the vacuum pressure infiltration continuous production to magnesium base composite material, energy-efficient, realize that the Design and manufacture of magnesium base composite material product is integrated.In addition; whole forming process is carried out under vacuum and gas atmosphere; can avoid magnesium alloy and the carbon fiber oxidizing fire in manufacture process, utilize the vacuum pouring gas pressure infiltration to effectively reduce requirement to precast body intensity, be conducive to the raising of composite product mechanical property.The maximum characteristics of this technique are that operating procedure is few, and technological process is short, and product quality is high.In addition, this technique can be according to the corresponding shaping dies of the size design of product, and the size of shaping product is unrestricted, and whole technical process can be carried out at general press equipment.
Description of drawings
Fig. 1 is the apparatus structure schematic diagram that the present invention prepares magnesium base composite material;
Fig. 2 is prior art vacuum pressure infiltration device schematic diagram;
Fig. 3 is gas pressure infiltration stage mould structure schematic diagram;
Fig. 4 is extrusion casint stage mould structure schematic diagram;
Fig. 5 ejects product stage mould structure schematic diagram;
Fig. 6 is special-shaped product forming die structure schematic diagram;
1-hydraulic jack among the figure, 2-punch, 3-graphite block, 4-recipient, 5-precast body, the 6-finishing die, 7-elema heater, 8-base, 9-push rod, the 10-feed tube, 11-resistance electrothermal device, 12-melting kettle, 13-liquid alloy, the 14-valve of exitting, 15-argon bottle, 16-air intake valve, 17-air inlet pipe, the 18-crucible cover, 19-seal washer, 20-vacuum-pumping tube, 21-valve, the 22-vacuum-pumping valve, 23-vavuum pump, 24-vacuum tank, 25-calandria.
The specific embodiment
Now in conjunction with the embodiments, the invention will be further described for accompanying drawing:
Embodiment 1.Used metallic matrix is the AZ91D magnesium alloy, and precast body adopts the T300 short carbon fiber, and volume fraction is 10%.Adopt wet method to prepare carbon fabric perform, being about to carbon fiber, pore creating material, dispersant, bonding agent and distilled water mixes by a certain percentage, after stirring, filter out moisture, die forming, obtain the carbon fabric perform biscuit, after low temperature drying is got rid of moisture, prepare the PyC coating by chemical vapour deposition (CVD) again.
With reference to Fig. 1, Fig. 3, Fig. 4 and Fig. 5, the device of the vacuum pressure infiltration continuous production magnesium base composite material cylinder product of the present embodiment is formed by smelting apparatus, extrusion die, pressure pouring system in combination.Its interconnected relationship is that smelting apparatus passes through feed tube 10 connection extrusion dies, and the pressure pouring system is connected smelting apparatus and extrusion die by pipeline with valve.
Described extrusion die comprises elema heater 7, punch 2, graphite block 3, recipient 4, finishing die 6, base 8 and push rod 9.Wherein, elema heater 7 be placed on recipient 4 around, finishing die 6 adopts matched in clearance with recipient 4, is positioned over the bottom, carbon fabric perform 5 is placed on the finishing die 6; Recipient bottom seals with rotary push rod 9, and by the rotation push rod inlet opening 9-1 is connected with feed tube and can realizes the quantitative pouring of liquid metal, placing graphite piece 3 on recipient 4 upper port, graphite block is with being interference fit between the recipient 4.
Described smelting apparatus comprises feed tube 10, melting kettle 12 and resistance heater 11.Wherein, melting kettle 12 is connected by the die cavity of feed tube 10 with recipient 4.Mg alloy AZ91 D ingot bar is added in the melting crucible 12, place seal washer 19 in the middle of crucible cover 18 and the melting crucible 12 rear fastening with dormant bolt, melting crucible 12 is placed in the resistance heater 11.
Described pressure pouring system comprises that argon bottle 15, vavuum pump 23 and a plurality of valve form.Argon bottle 15 is connected with melting crucible 12 by the admission line 17 that air intake valve 16 is installed, and drain tap 14 links to each other with air inlet pipe 16 by three-way interface; Vavuum pump 23 not only is connected with the die cavity of recipient 4 but also is connected with melting kettle 12; Be equipped with near the vavuum pump 23 the pipeline and vacuumize by-pass valve control 22.
After assembling is finished according to the method described above, close air intake valve 16 and drain tap 14, open valve 21 and vacuum-pumping valve 22.With vacuumizing in 23 pairs of die cavitys of vavuum pump and the crucible chamber, when vacuum reaches 10KPa in the chamber, stop to vacuumize, continue next step operation; Otherwise, check the sealing situation of each interface, complete by top order of connection assembling after, the operation below continuing.The start-up temperature control system, resistance heater 11 heating 2～3 hours make the crucible temperature temperature remain on 600～850 ℃, so that magnesium alloy all melts; Elema heater 7 heating 1～2 hour make precast body and finishing die temperature be controlled at temperature at 400～700 ℃.Valve-off 21 and vacuum-pumping valve 22, punch are about to graphite block 3 for 2 times and are pressed into the desired location of recipient.Open air intake valve 16, gas pressure is controlled at 0.3～0.6MPa, utilize draught head that air pressure and vacuum form with magnesium alloy pouring to recipient 4.Continue to pass into air pressure, make liquid magnesium alloy seepage flow upwards under gas pressure, be immersed in the precast body 5.Rotate push rod 9 inlet opening 9-1 is staggered with feed tube 10, close air intake valve 16, open drain tap 14 unnecessary alloy is back in the melting kettle 12.Close elema heater 7, air cooling cooling, when recipient temperature during at 440～590 ℃, punch 2 descending pressurizations, the pressure by graphite block 3 loads to eliminate the defective of not infiltrating to recipient inside composite.When continuing to be cooled to the 350-400 ℃ of left and right sides, push rod 9 ejects finishing die 6 with magnesium base composite material, and once-forming goes out high-performance magnesium base composite material product.Put into subsequently new carbon fabric perform, placing graphite piece 3 sealed extruded cylinders 4, push rod 9 is descending and rotate inlet opening 9-1 is connected with feed tube 10, enters next time preparation process.
Embodiment 2.Referring to Fig. 1, Fig. 6, the used metallic matrix of the present embodiment is the AZ91D magnesium alloy, carbon fabric perform is for carrying out the special-shaped precast body that cutting processing obtains to the whole carbon felt of T700, adopt the CVD method to prepare the SiC coating at carbon fiber surface, to reach the purpose of improving wetability.
Step 1: the special-shaped carbon fiber precast body 5 for preparing is positioned in the recipient 4, the volume fraction of carbon fabric perform is 15%, AZ91D magnesium alloy ingot bar is positioned in the crucible 12, the sealing smelting apparatus, connect experimental provision, graphite block 3 is pressed into recipient 4, and graphite block is with being interference fit between the recipient.
Step 2: close air intake valve 16 and drain tap 14, open valve 21 and vacuumize by-pass valve control 22.With vacuumizing in 23 pairs of die cavitys of vavuum pump and the melting crucible chamber, when vacuum reaches 1KPa in the chamber, stop to vacuumize.
Step 3: the start-up temperature control system, resistance heater 11 heating about 2～3 hours make the crucible temperature temperature remain on 600～850 ℃, so that the AZ91D magnesium alloy all melts; Elema heater 7 heating about 1～2 hour make precast body and finishing die temperature be controlled at temperature at 400～700 ℃;
Step 4: valve-off 21 and vacuum-pumping valve 22, punch are about to graphite block 3 for 2 times and are fixed to setting height, open air intake valve 16, and gas pressure is controlled at 0.3～0.6MPa, utilize air pressure with magnesium alloy pouring to recipient 4;
Step 5: continue to pass into protective gas; liquid magnesium alloy seepage flow under gas pressure is entered in the carbon fabric perform 5; rotate push rod 9 inlet opening 9-1 is staggered with feed tube 10, open venting valve 14, close air intake valve 16 unnecessary alloy is back in the melting kettle 12.Elema heater 7 outage, the air cooling cooling, when finishing die 6 temperature during 440～590 ℃ of left and right sides, punch 2 is descending, to the densification of pressurizeing of the magnesium base composite materials in the recipient 4, eliminates the composite inner defective of not infiltrating.
Step 6: when continuing to be cooled to the 350-400 ℃ of left and right sides, push rod 9 ejects finishing die 6, obtains high-quality magnesium base composite material product.
Step 7: place new carbon fabric perform, graphite block 3 is pressed into recipient and realizes sealing, and push rod 9 comes downwards to initial position and rotates inlet opening 9-1 is communicated with feed tube 10, changes subsequently step 2 over to, carries out the again preparation of magnesium base composite material product.
Embodiment 3: referring to Fig. 1, the volume fraction of present embodiment carbon fabric perform is between the 20-40%, and precast body is processed by quadrature puncture carbon felt, the fiber surface coating is nickel coating, before the pressure pouring, vacuum is 10Pa in the mold cavity, and other is identical with specific embodiment 2.
Embodiment 4: referring to Fig. 1, the volume fraction of present embodiment carbon fabric perform is between the 40-50%, and precast body is formed by the puncture of multilayer quadrature carbon cloth, the fiber surface coating is the PyC/SiC composite coating, before the pressure pouring, vacuum is 1Pa in the mold cavity, and other is identical with specific embodiment 1.
Claims (1)
1. the device of a magnesium base composite material profiled piece vacuum pressure infiltration continuous production is characterized in that comprising extrusion die, melting kettle (12), resistance heater (11), feed tube (10) and air pressure running gate system; Described extrusion die comprises elema heater (7), punch (2), graphite block (3), recipient (4), finishing die (6), base (8) and push rod (9); Described pressure pouring system comprises argon bottle (15), vavuum pump (23), venting valve (14), air intake valve (16), valve (22), vacuumizes by-pass valve control (22) and connecting line; Recipient (4) is fixed on the base (8), and is placed on simultaneously in the elema heater (7); Finishing die (6) is positioned at recipient (4) bottom, adopts matched in clearance with recipient (4); Place the graphite block (3) with boss structure in recipient (4) upper port, adopt between the same recipient of graphite block (4) to form interference fit; The center of base (8) is a through hole, and the diameter of through hole is provided with in the through hole and can rotates and up and down push rod (9) less than the internal diameter of recipient (4); The upper end of push rod (9) is provided with cone tank, and the bottom of groove is provided with a through hole (9-1) that is communicated with push rod (9) outside, and this through hole is by feed tube (10) and melting kettle (12) internal communication; Melting crucible (12) upper end is crucible cover (18) and seal washer (19) fixedly, and melting crucible (12) is placed in the resistance heater (11); Vavuum pump (23) is connected in recipient (4) and the melting crucible (12) by pipeline, pipeline between vavuum pump (23) and the recipient (4) is provided with and vacuumizes by-pass valve control (22), and the pipeline between vavuum pump (23) and the melting crucible (12) is provided with valve (21); Gas cylinder (15) is connected in the melting crucible (12) by pipeline, and the pipeline between gas cylinder (15) and the melting crucible (12) is provided with air intake valve (16), passes through tubes rows air valve (14) in the melting crucible (12).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220322012 CN202684050U (en) | 2012-07-05 | 2012-07-05 | Vacuum pressure infiltration device for continuously preparing magnesium-based composite material irregular part |
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| CN 201220322012 CN202684050U (en) | 2012-07-05 | 2012-07-05 | Vacuum pressure infiltration device for continuously preparing magnesium-based composite material irregular part |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102728813A (en) * | 2012-07-05 | 2012-10-17 | 西北工业大学 | Device and preparation method for continuously preparing magnesium-based composite material irregular-shape piece by vacuum pressure infiltration |
| CN103341615A (en) * | 2013-07-25 | 2013-10-09 | 江西铜业股份有限公司 | Box shell body aluminum casting infiltration leak-repairing method and system in pressurization mode |
| CN103464728A (en) * | 2013-08-28 | 2013-12-25 | 西北工业大学 | Magnesium matrix composite forming device and method for forming magnesium matrix composite by device |
| CN103695815A (en) * | 2013-12-20 | 2014-04-02 | 西北工业大学 | Device and method for separate preheating and one-step infiltration extrusion forming of magnesium-based composite |
| CN105798274A (en) * | 2016-05-22 | 2016-07-27 | 大同新成新材料股份有限公司 | Device and method for impregnating pantograph slide strip with metal |
| CN106424667A (en) * | 2016-12-19 | 2017-02-22 | 湖南顶立科技有限公司 | Impregnating equipment and method |
| CN106733421A (en) * | 2016-12-19 | 2017-05-31 | 湖南顶立科技有限公司 | A kind of immersion system and dipping method |
| CN109182823A (en) * | 2018-10-31 | 2019-01-11 | 哈尔滨工业大学 | The method of squeeze casting mould and its controllable extrusion casint crystal whisker reinforcing aluminum base composite material |
| CN110560667A (en) * | 2018-06-06 | 2019-12-13 | 张志国 | Vacuum-pressure conversion casting infiltration method and equipment for metal matrix ceramic composite material |
| US11180422B2 (en) | 2018-10-23 | 2021-11-23 | Honda Motor Co., Ltd. | Vacuum pressure transformation vessel and method of use |
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2012
- 2012-07-05 CN CN 201220322012 patent/CN202684050U/en not_active Withdrawn - After Issue
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102728813A (en) * | 2012-07-05 | 2012-10-17 | 西北工业大学 | Device and preparation method for continuously preparing magnesium-based composite material irregular-shape piece by vacuum pressure infiltration |
| CN102728813B (en) * | 2012-07-05 | 2014-10-15 | 西北工业大学 | Device and preparation method for continuously preparing magnesium-based composite material irregular-shape piece by vacuum pressure infiltration |
| CN103341615A (en) * | 2013-07-25 | 2013-10-09 | 江西铜业股份有限公司 | Box shell body aluminum casting infiltration leak-repairing method and system in pressurization mode |
| CN103464728A (en) * | 2013-08-28 | 2013-12-25 | 西北工业大学 | Magnesium matrix composite forming device and method for forming magnesium matrix composite by device |
| CN103695815A (en) * | 2013-12-20 | 2014-04-02 | 西北工业大学 | Device and method for separate preheating and one-step infiltration extrusion forming of magnesium-based composite |
| CN103695815B (en) * | 2013-12-20 | 2015-07-01 | 西北工业大学 | Device and method for separate preheating and one-step infiltration extrusion forming of magnesium-based composite |
| CN105798274A (en) * | 2016-05-22 | 2016-07-27 | 大同新成新材料股份有限公司 | Device and method for impregnating pantograph slide strip with metal |
| CN105798274B (en) * | 2016-05-22 | 2018-11-13 | 大同新成新材料股份有限公司 | A kind of device and method for pantograph draw runner leaching metal |
| CN106424667A (en) * | 2016-12-19 | 2017-02-22 | 湖南顶立科技有限公司 | Impregnating equipment and method |
| CN106733421A (en) * | 2016-12-19 | 2017-05-31 | 湖南顶立科技有限公司 | A kind of immersion system and dipping method |
| CN106424667B (en) * | 2016-12-19 | 2018-08-03 | 湖南顶立科技有限公司 | A kind of impregnating equipment and dipping method |
| CN106733421B (en) * | 2016-12-19 | 2019-12-17 | 湖南顶立科技有限公司 | Impregnation device and impregnation method |
| CN110560667A (en) * | 2018-06-06 | 2019-12-13 | 张志国 | Vacuum-pressure conversion casting infiltration method and equipment for metal matrix ceramic composite material |
| US11180422B2 (en) | 2018-10-23 | 2021-11-23 | Honda Motor Co., Ltd. | Vacuum pressure transformation vessel and method of use |
| CN109182823A (en) * | 2018-10-31 | 2019-01-11 | 哈尔滨工业大学 | The method of squeeze casting mould and its controllable extrusion casint crystal whisker reinforcing aluminum base composite material |
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