CN2583113Y - Single crystal high temperature alloy electric field unidirectional solidification equipment - Google Patents
Single crystal high temperature alloy electric field unidirectional solidification equipment Download PDFInfo
- Publication number
- CN2583113Y CN2583113Y CN 02251220 CN02251220U CN2583113Y CN 2583113 Y CN2583113 Y CN 2583113Y CN 02251220 CN02251220 CN 02251220 CN 02251220 U CN02251220 U CN 02251220U CN 2583113 Y CN2583113 Y CN 2583113Y
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- China
- Prior art keywords
- single crystal
- sample
- inductor
- electric field
- housing
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- 239000013078 crystal Substances 0.000 title claims abstract description 33
- 230000005684 electric field Effects 0.000 title claims abstract description 30
- 238000007711 solidification Methods 0.000 title claims abstract description 22
- 230000008023 solidification Effects 0.000 title claims abstract description 22
- 229910045601 alloy Inorganic materials 0.000 title abstract description 6
- 239000000956 alloy Substances 0.000 title abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 5
- 229910000601 superalloy Inorganic materials 0.000 claims description 27
- 229920000742 Cotton Polymers 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- 239000010439 graphite Substances 0.000 claims description 10
- 230000006698 induction Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000000171 quenching effect Effects 0.000 abstract description 5
- 230000008520 organization Effects 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 36
- 229910052786 argon Inorganic materials 0.000 description 18
- 239000007789 gas Substances 0.000 description 17
- 239000007788 liquid Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000005204 segregation Methods 0.000 description 4
- 239000011449 brick Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The utility model relates to a single crystal high temperature alloy solidification technology, particularly a single crystal high temperature alloy electric field unidirectional solidification apparatus, which is provided with a casing body, a heating device, a sample holding mechanism, and a DC electric field generator, wherein the holding mechanism is arranged below the casing body and is composed of two holding rods arranged on a support. One end of each rod of two holding rods is respectively connected with a rotary shaft on the support, and the other end is connected through a fixing piece. Outer lateral surfaces thereof are respectively provided with a tension spring, and the other end of the tension spring is fixed on the support. The lower end of a sample passes through a hole positioned in the middle of the casing body bottom and is positioned between two holding rods, and the support is provided with a through hole which the sample passes through. The DC electric field generator is that a programmable function module is connected in series between one end of the sample and one electrode of a stabilized voltage supply, and the other end is connected with the other electrode of the stabilized voltage supply to form a closed return circuit through the holding rod. The utility model can avoid the generation of mixed crystals in process of directional solidification, refine single crystal high temperature alloy solidification organization, and be good for quick quenching.
Description
Technical field
The utility model relates to the single crystal super alloy solidification technology, is specially a kind of single crystal super alloy electric-field directional solidification equipment.
Background technology
Single crystal super alloy has superior high temperature creep property and low-cycle thermal fatigue performance, is the first-selected high temperature alloy of blade of aviation engine.But the single crystal super alloy setting rate is lower, and solidified structure is thick; Very easily produce solute segregation simultaneously because alloying level is high, microstructure and property to alloy brings adverse influence, limited the performance of single crystal super alloy potentiality, refinement single crystal super alloy solidified structure and reduction solidifying segregation are the targets of seek assiduously in the investigation of materials field.Existing result of study shows the electric field energy thinning metal solidification texture, improves γ ' phase pattern, reduces segregation and microporosity, helps improving the single crystal super alloy use properties.Single crystal super alloy is to have eliminated crystal boundary with respect to the superiority of common directionally solidified superalloy, DS superalloy and improves high-temperature behavior, generation in the directional freeze process, how to avoid stray crystal be experiment and produce in the problem that needs to think better of and should solve.In common argon shield apparatus for directional solidification; because the slit of argon gas stream between test tube and thermal baffle; draw scattering and disappearing of superthermal amount; cause directional freeze solid-liquid interface radial symmetry gradient to increase; be unfavorable for DC electric field; after introducing DC electric field, how to carry out sample and quench also for needing the problem of solution.
The utility model content
The purpose of this utility model is to provide a kind of single crystal super alloy electric-field directional solidification equipment of avoiding stray crystal generation, thinning metal solidification texture in the directional freeze process, being beneficial to rapid quenching.
The technical solution of the utility model is to have housing, heating unit, sample clamping mechanism and DC electric field generating unit, described clamping device places the housing below, being provided with two supporting rods by carriage constitutes, described two supporting rod one ends are connected with rotating shaft on the carriage respectively, can rotate around the axis, the other end connects by fastening piece, and its outer side is separately installed with tensioning spring, the tensioning spring the other end is fixed in carriage, the sample lower end is passed the hole that the housing bottom mid-way has and is placed between two supporting rods, and described carriage has the through hole that sample passes; Described DC electric field generating unit is to be in series with the programmable functions module between the utmost point of sample one end and voltage stabilized source, and the other end is another loop line that extremely links to each other and form by supporting rod and voltage stabilized source, and described voltage stabilized source electric current is 0～60A;
The opposite flank of described two supporting rods has corresponding groove, matches with the sample of clamping; Described two supporting rods outside is respectively equipped with water-cooled tube; Described fastening piece is a trip bolt;
Described heating unit is made of induction heater and inductor, and the inductor bottom is provided with thermal baffle, and the top of inductor and outer periphery are provided with insulating cotton between the housing inner side-wall, and the insulating cotton between inductor and the housing inner side-wall is pricked ventilating pit; Described thermal baffle is a right cylinder, and the centre has cylindrical hole, and radial ventilation groove is left in the bottom; Described insulating cotton is Al
2O
3Insulating cotton; Described housing is a quartz glass cover; Described inductor is the graphite inductor.
The utlity model has following characteristics:
1. the utility model is introduced DC electric field, thereby can apply electric field in directional freeze, realizes that by programmodule able to programme multiple electric field applies pattern, the energy thinning metal solidification texture, improve γ ' phase pattern, reduce segregation and microporosity, help improving the single crystal super alloy use properties.
2. the argon gas glide path that adopts of the utility model directional freeze solid-liquid interface argon gas stream that realizes flowing through is very little, guarantees that directional freeze solid-liquid interface radial symmetry gradient reduces, and reduces the possibility that stray crystal produces, and has solidified part and has kept monocrystalline state.
3. the utility model adopts the water-cooled clamping device that can open fast, and sample bottom heat is taken away rapidly, can be simultaneously as a utmost point of introducing DC electric field, and clamping device can be opened fast, and sample solidifies solid-liquid interface can rapid quenching when quenching.
4. the utility model electric-field directional solidification experimental installation Heating temperature can reach 1700 ℃, and thermograde was 200 ℃/cm when single crystal super alloy solidified.
5. the stirring action of induction heating magnetic field liquid towards metal is avoided in the electromagnetic induction effect conductively-closed of the utility model induction heating magnetic field liquid towards metal.
6. the good protection effect of the utility model argon gas, the oxidation of superalloy sample is slight, and graphite inductor scaling loss is considerably less.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model heating unit electrical schematic.
Fig. 3 is the formation synoptic diagram of the utility model argon shield gas curtain.
Fig. 4 is the utility model clamping device structural representation.
Fig. 5 is the utility model DC electric field generating unit principle sketch.
Embodiment
As shown in Figure 1, single crystal super alloy electric-field directional solidification device structure comprises three parts: heating unit 4, clamping device 7 and DC electric field generating unit.Describe in detail below at this point.
Heating unit 4 adopts IGBT ultrasonic frequency power supply to produce single phase alternating current, after the transformer step-down, deliver to induction heater 41, induction heater 41 heating graphite inductors 42, graphite inductor 42 is with radiation mode heating sample 3, and whole device electrical equipment principle is as shown in Figure 2.
Adopt high purity Al around the graphite inductor 42
2O
3Insulating cotton 11 insulations, Al
2O
3Insulating cotton 11 refractoriness are higher than 1700 ℃, has good heat insulation effect, process furnace is after working two hours under 1550 ℃, quartz glass cover (housing) 2 temperature still are lower than 400 ℃, select foam refractory brick to make thermal baffle, thermal baffle 5 is made cylindric, and the centre has cylindrical hole, and radial ventilation groove is left in the bottom; Graphite inductor 42 top Al
2O
3Insulating cotton 11 and Al
2O
3Passing through of argon gas reduced by tamping in crucible 10 gaps as far as possible, the Al between inductor 42 and quartz glass cover 2 inner side-walls
2O
3Insulating cotton 11 is pricked ventilating pit, makes from the argon gas of argon gas inlet 1 mainly from the thermal baffle 5 bottoms radial air drain concentrated flow mistake of quartz glass cover inwall and foam refractory brick system; Mid-way, quartz glass cover 2 bottom has compares Al
2O
3The hole that the crucible external diameter is big slightly is so that Al
2O
3Crucible passes from quartz glass cover 2 bottoms, and argon gas flows out from the hole argon gas export 6 of the two, realizes the seal protection of argon gas.
Fig. 3 is the formation synoptic diagram of argon shield gas curtain in the equipment, and freezing interface place argon gas stream is very little, makes freezing interface maintenance level, reduces the possibility of the generation of stray crystal in solidifying.
According to the long-time statistical result, electric current is 0～60A/cm
2, on single crystal super alloy electric-field directional solidification equipment, after the DD3 single crystal super alloy directional freeze, the sample more than 90% still keeps monocrystalline state, and on conventional equipment, stray crystal appears in the sample more than 30%.
Air in the quartz glass cover is fully expelled, and single crystal super alloy is in the argon gas atmosphere fully, and scaling loss is considerably less, and air significantly alleviates the oxidation of superalloy melt, directional freeze graphite inductor, and scaling loss is considerably less.
Argon gas mainly when quartz glass cover 2 inwalls and thermal baffle 5 belows are flow through, reduces the heat that argon gas is taken away, and the required power of IGBT ultrasonic frequency power supply decreases, and has certain energy-saving effect.
Clamping device structural representation as shown in Figure 4, described clamping device 7 places housing 2 belows, being provided with two supporting rods 75 by carriage 74 constitutes, sample 3 bottoms are passed the hole that mid-way, housing 2 bottom has and are placed between two supporting rods 75, sample 3 lower ends are held bar 75 and are fixed on the arc groove place that is slightly larger than its radius, supporting rod 75 can rotate on carriage 74 planes around rotating shaft 76, under the effect of fastening piece (trip bolt) 72 holding forces, coupon 2 is firmly clamped; Two supporting rod 75 1 ends are connected with rotating shaft 76 on the carriage 74 respectively, the other end connects by fastening piece (trip bolt) 72, and its outer side is separately installed with tensioning spring 73, tensioning spring 73 the other ends are fixed in carriage 74, described supporting rod adopts the copper alloy with excellent heat conductivity performance to make, the outside is welded with water-cooled tube 71 (copper pipe), under the effect of water coolant, sample 3 bottom heats are taken away rapidly, thereby the higher thermograde of directional freeze sample solid-liquid interface forward position tool, when Heating temperature is 1550 ℃, DD3 superalloy directional freeze solid-liquid interface temp gradient at front edge reaches 200 ℃/cm, when clamp screws 72 was opened, supporting rod 75 was opened rapidly under the effect of tensioning spring 73 power, and the through hole that sample 3 passes on the carriage 74 is fallen in the quenching mechanism.
Fig. 5 is a DC electric field generating unit principle sketch, sample 3 middle portions are liquid in the directional freeze process, it is solid-state that two ends keep, sample 3 tops connect with molybdenum filament, link to each other by the positive pole of programmable functions module 8 with voltage stabilized source 9, sample 3 lower ends link to each other with the negative pole of voltage stabilized source 9 by supporting rod 75, form the loop line, the voltage stabilized source electric current is adjustable continuously in 0～60A scope, programmable functions module 8 is a prior art, as adopting: the AF-10M2-A type programmable functions module that Array Electrical Appliances Co., Ltd in Taiwan produces, can realize multiple time switch function.
Claims (6)
1. single crystal super alloy electric-field directional solidification equipment, has housing (2), heating unit (4), it is characterized in that also comprising sample clamping mechanism (7) and DC electric field generating unit, described clamping device (7) places housing (2) below, being provided with two supporting rods (75) by carriage (74) constitutes, described two supporting rods (75) one ends are connected with rotating shaft (76) on the carriage (74) respectively, the other end connects by fastening piece (72), and its outer side is separately installed with tensioning spring (73), tensioning spring (73) the other end is fixed in carriage (74), sample (3) lower end is passed the hole that mid-way, housing (2) bottom has and is placed between two supporting rods (75), and described carriage (74) has the through hole that sample (3) passes; Described DC electric field generating unit is to be in series with programmable functions module (8) between the utmost point of sample (3) one ends and voltage stabilized source (9), loop line of the other end another formation that extremely links to each other by supporting rod (75) and voltage stabilized source (9).
2. according to the described single crystal super alloy electric-field directional solidification of claim 1 equipment, it is characterized in that the opposite flank of described two supporting rods (75) has corresponding groove, match with the sample (3) of clamping.
3. according to claim 1 or 2 described single crystal super alloy electric-field directional solidification equipment, it is characterized in that described two supporting rods (75) outside is respectively equipped with water-cooled tube (71).
4. according to the described single crystal super alloy electric-field directional solidification of claim 1 equipment, it is characterized in that described heating unit (4) is made of induction heater (41) and inductor (42), inductor (42) bottom is provided with thermal baffle (5), the top of inductor (42) and outer periphery are provided with insulating cotton (11) between housing (2) inner side-wall, the insulating cotton (11) between inductor (42) and housing (2) inner side-wall is pricked ventilating pit; Described thermal baffle (5) is a right cylinder, and the centre has cylindrical hole, and radial ventilation groove is left in the bottom.
5. according to the described single crystal super alloy electric-field directional solidification of claim 4 equipment, it is characterized in that described insulating cotton (11) is Al
2O
3Insulating cotton; Described housing (2) is a quartz glass cover; Described inductor (42) is the graphite inductor.
6. according to the described single crystal super alloy electric-field directional solidification of claim 1 equipment, it is characterized in that described voltage stabilized source (9) electric current is 0～60A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02251220 CN2583113Y (en) | 2002-12-13 | 2002-12-13 | Single crystal high temperature alloy electric field unidirectional solidification equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02251220 CN2583113Y (en) | 2002-12-13 | 2002-12-13 | Single crystal high temperature alloy electric field unidirectional solidification equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2583113Y true CN2583113Y (en) | 2003-10-29 |
Family
ID=33721159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02251220 Expired - Fee Related CN2583113Y (en) | 2002-12-13 | 2002-12-13 | Single crystal high temperature alloy electric field unidirectional solidification equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2583113Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069176B (en) * | 2009-11-25 | 2012-10-03 | 中国科学院金属研究所 | Liquid metal cooling directional solidification process |
| CN105603209A (en) * | 2016-03-15 | 2016-05-25 | 东北大学 | Blowing-type induction melting furnace |
| CN108680440A (en) * | 2018-03-19 | 2018-10-19 | 北京航空航天大学 | High-temperature material Mechanics Performance Testing heating using cold aid mode and measuring system |
| CN110252958A (en) * | 2019-06-21 | 2019-09-20 | 西安交通大学 | It is a kind of based on listrium it is hollow/porous structure inhibit listrium stray crystal defect blade casting mold preparation method |
| CN110579419A (en) * | 2019-08-28 | 2019-12-17 | 安徽江淮汽车集团股份有限公司 | Low cycle fatigue reliability test method and device |
| CN112399744A (en) * | 2020-11-10 | 2021-02-23 | 北京动力机械研究所 | Composite high-temperature-resistant heat-resistant support structure |
-
2002
- 2002-12-13 CN CN 02251220 patent/CN2583113Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069176B (en) * | 2009-11-25 | 2012-10-03 | 中国科学院金属研究所 | Liquid metal cooling directional solidification process |
| CN105603209A (en) * | 2016-03-15 | 2016-05-25 | 东北大学 | Blowing-type induction melting furnace |
| CN108680440A (en) * | 2018-03-19 | 2018-10-19 | 北京航空航天大学 | High-temperature material Mechanics Performance Testing heating using cold aid mode and measuring system |
| CN110252958A (en) * | 2019-06-21 | 2019-09-20 | 西安交通大学 | It is a kind of based on listrium it is hollow/porous structure inhibit listrium stray crystal defect blade casting mold preparation method |
| CN110579419A (en) * | 2019-08-28 | 2019-12-17 | 安徽江淮汽车集团股份有限公司 | Low cycle fatigue reliability test method and device |
| CN110579419B (en) * | 2019-08-28 | 2021-07-13 | 安徽江淮汽车集团股份有限公司 | Low cycle fatigue reliability test method and device |
| CN112399744A (en) * | 2020-11-10 | 2021-02-23 | 北京动力机械研究所 | Composite high-temperature-resistant heat-resistant support structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |