CN103472085B - The base alloy directionally solidified experimental facilities of Ti-Al under DC current effect and experimental technique - Google Patents
The base alloy directionally solidified experimental facilities of Ti-Al under DC current effect and experimental technique Download PDFInfo
- Publication number
- CN103472085B CN103472085B CN201310449586.5A CN201310449586A CN103472085B CN 103472085 B CN103472085 B CN 103472085B CN 201310449586 A CN201310449586 A CN 201310449586A CN 103472085 B CN103472085 B CN 103472085B
- Authority
- CN
- China
- Prior art keywords
- base alloy
- directionally solidified
- directional solidification
- alloy directionally
- molybdenum filament
- 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.)
- Active
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The base alloy directionally solidified experimental facilities of Ti-Al under DC current effect and experimental technique, relate to the base alloy directionally solidified equipment of a kind of Ti-Al and clotting method.The invention solves cannot impressed current is introduced in directional solidification process problem, and cannot determine to introduce the problem of voltage swing.Experimental facilities: upper end and the constant voltage dc source of positive pole molybdenum filament and the base alloy directionally solidified sample of Ti-Al are connected, and insulating glass fibers cloth is connected with positive pole molybdenum filament, and negative pole molybdenum filament is connected with the base alloy directionally solidified sample lower end of Ti-Al and constant voltage dc source.Experimental technique: close fire door, opens vacuum pump, vacuumizes after passing into argon gas and close oil-sealed rotary pump; Start suction pump, open induction heating power, hierarchical loading power, then be incubated; Start constant voltage dc source, the speed of setting output voltage and lower pumping rod; When pull length is to 35mm, stop heating, close constant voltage dc source, in-furnace temperature reaches room temperature, takes out sample.The present invention is used in the base alloy directionally solidified experiment of Ti-Al.
Description
Technical field
The present invention relates to the base alloy directionally solidified equipment of a kind of Ti-Al and clotting method, be specifically related to the base alloy directionally solidified experimental facilities of Ti-Al under a kind of DC current effect and experimental technique.
Background technology
At present, many advantages such as foundry engieering is applied widely with it in materials processing technology, manufacturing accuracy is high and with low cost still occupy extremely important status, although people make the performance of foundry goods obtain great lifting by various technological means, but still cannot meet the requirement of equipment manufacture to material, especially aerospace field performance very outstanding.In order to improve the efficiency of aerospace vehicle, people have developed the material of various new and novel casting process technology in recent years.The successful development of nickel-base alloy, just greatly advance the application of gas-turbine unit at aviation field, but along with aero-turbine head temperature and thrust-weight ratio constantly rise, make the usability of titanium group high temperature alloy and the traditional high-temperature structural material of nickel-base alloy these two kinds improve and reached the limit, therefore must continue to study the technical requirement condition that more advanced new material and casting technique could meet following gas-turbine unit.
Solidification technology development change in recent years, creates much novel solidification process control method, and the effect of these novel method centre fields is fairly obvious on the impact of metal solidification texture, obtains significant progress in Mechanism Study and application aspect.Modern society attaches great importance to environmental protection on the other hand, and utilize the solidification technology under outer field action, not only can reduce environmental pollution, but also can avoid the pollution of alloy melt, this is very important to the long term growth of material processing technique.
improve the effective way of Ti-Al base alloy property:ti-Al base alloy has the ubiquitous drawback of intermetallic compound, is exactly that its plasticity is very low at ambient temperature, and this is that the large-scale application of Ti-Al base alloy causes obstruction, and this is also the bottleneck problem that researcher makes great efforts to solve simultaneously.The experimental results shows that the mechanical property of Ti-Al base alloy and its microstructure and alloying component have and contacts closely.
By adding solid solution element or precipitation strength, controlling high-temperature oxidation resistance and mechanical property that the method such as grain size and tissue morphology effectively can improve Ti-Al base alloy.The content adding alloying element or Al element can change the lattice parameter affecting Ti-Al base alloy, is conducive to putting forward heavy alloyed plasticity.Unit-cell volume reduces to make the interaction force between Ti-Al atom strengthen, and this can weaken covalency key, thus the plasticity of alloy is raised.
One of Main way of the base alloy directionally solidified research of Ti-Al by the lamellar orientation in the base alloy directionally solidified tissue of control Ti-Al to improve the performance of Ti-Al base alloy.The lamellar orientation of γ-Ti-Al alloy affects highly significant to its mechanical property.Can find that its mechanical property constantly changes with the change of the angle of lamellar orientation and Impact direction, when angle is 0 °, alloy has best plasticity and the coupling of intensity, during this state, the combination property of material is also best, when angle is 90 °, the intensity of alloy is the highest, but plasticity is minimum, this situation should be avoided.
electric current is to the effect improving Ti-Al base alloy structure performance:utilize electric current to improve the base alloy directionally solidified tissue of Ti-Al and open a kind of new approach improving Ti-Al base alloy structure and performance, although the directional solidification experimental technique under having had scholar to invent the function of current, but be all used to the active low and low-melting alloy of specializes in chemistry, and the high-melting-point alloy that activity is high is not also related to.Because the chemical activity of Ti-Al base alloy is relatively more active so it is also higher to the requirement of equipment, in experiment, there are some technological difficulties, such as: magnetic field during induction graphite cannula heating sample on sample can interact with impressed current; Can not the base alloy directionally solidified process of Ti-Al under the Real Time Observation function of current, be unfavorable for carrying out the research of electric current to its Influencing Mechanism; Very active, therefore very high to the requirement of formwork during the high and high temperature of the fusing point of Ti-Al base alloy.
But, with electromagnetic cold crucible apparatus for directional solidification for platform carry out under DC current effect Ti-Al base directional solidification experiment time, also there is a technical matters: the problem that impressed current is introduced in directional solidification process, and the problem that the size introducing voltage cannot be determined.
Summary of the invention
The object of the invention is to propose the base alloy directionally solidified experimental facilities of Ti-Al under a kind of DC current effect and experimental technique, solve with electromagnetic cold crucible apparatus for directional solidification for platform carry out under DC current effect Ti-Al base directional solidification experiment time, cannot impressed current is introduced in directional solidification process problem, and cannot determine to introduce the problem of voltage swing.
The present invention in order to solve the problems of the technologies described above taked technical scheme is:
The base alloy directionally solidified experimental facilities of Ti-Al under DC current effect of the present invention comprises feeding rod, gas inlet and outlet, insulating glass fibers cloth, load coil, graphite cannula, cooling bath, cooling liquid state metal, lower pumping rod, directional solidification body of heater, formwork, thermopair, temperature measurer, vacuum pump, argon gas gas injection pump, three-way valve, graphite felt, circulating water pipe and water pump, the upper portion side wall of described directional solidification body of heater is fitted with gas inlet and outlet, the outer end of gas inlet and outlet is communicated with argon gas gas injection pump with vacuum pump by three-way valve, the roof of described body of heater is fitted with feeding rod, the lower end of upper feeding rod is connected with insulating glass fibers cloth, described cooling bath is arranged on the base plate of directional solidification body of heater, cooling liquid state metal is marked with in cooling bath, it is inner that the upper end of lower pumping rod is placed in directional solidification body of heater through the bottom of directional solidification body of heater, described graphite felt is arranged in directional solidification body of heater, described graphite felt has center pit, the lower end of formwork is connected with lower pumping rod through center pit, the base alloy directionally solidified sample of Ti-Al is arranged in formwork, graphite cannula and load coil are enclosed within formwork from inside to outside successively, one end of thermopair and the base alloy directionally solidified sample contacts of Ti-Al, the sidewall that the other end of thermopair passes directional solidification body of heater is connected with temperature measurer, circulating water pipe is communicated with water pump,
The base alloy directionally solidified experimental facilities of Ti-Al under described DC current effect also comprises positive pole molybdenum filament, constant voltage dc source and negative pole molybdenum filament, one end of described positive pole molybdenum filament is connected with the upper end of the base alloy directionally solidified sample of Ti-Al, insulating glass fibers cloth is connected with positive pole molybdenum filament, the sidewall that the other end of positive pole molybdenum filament passes directional solidification body of heater is connected with constant voltage dc source, one end of negative pole molybdenum filament is connected with the base alloy directionally solidified sample lower end of Ti-Al through formwork, and the sidewall that the other end of negative pole molybdenum filament passes directional solidification body of heater is connected with constant voltage dc source.
Preferred: the diameter of described positive pole molybdenum filament and negative pole molybdenum filament is 1mm.In experiment be adopt resistant to elevated temperatures diameter be 1mm molybdenum filament introduce.Additionally by experimental verification single turn positive pole molybdenum filament and the maximum DC current can introducing 15A of negative pole molybdenum filament, can increase by the number of turn increasing positive pole molybdenum filament and negative pole molybdenum filament the maximal value introducing electric current.
Preferred: described formwork is yttrium oxide shuttering.
Preferred: described vacuum pump is oil-sealed rotary pump.
Preferred: described cooling bath is gallium indium cooling bath.
Preferred: described cooling liquid state metal is gallium indium liquid coolant.
Preferred: the base alloy directionally solidified sample of described Ti-Al is the alloy directionally solidified sample of Ti-48Al-2Cr-2Nb, the female ingot of its alloy adopts consumable arc-melting stove to carry out melting and obtains, after melting casting, make the ingot casting that diameter is 150mm, recycling line cutting technology cuts from the female ingot of alloy the charge bar that diameter is 14.5mm.
The present invention is based on the experimental technique that the base alloy directionally solidified experimental provision of Ti-Al under the DC current effect described in such scheme one carries out, concrete steps are:
Step one: load the base alloy directionally solidified sample of Ti-Al in directional solidification furnace, close directional solidification furnace door, open vacuum pump, discharge air in directional solidification furnace to directional solidification furnace pressure at below 5Pa, then passing into argon gas to directional solidification furnace pressure is 300Pa, again vacuumizes, so repeats twice, finally passing into argon gas to directional solidification furnace pressure is 300Pa, closes oil-sealed rotary pump;
Step 2: open cool cycles water pipe, starts suction pump, opens induction heating power, hierarchical loading power, when temperature measurer displays temperature is 1600 DEG C, stops continuing to increase power, is then incubated 5min;
Step 3: start constant voltage dc source, setting output voltage is 5V to 15V, and the speed of the lower pumping rod of setting is 0.6mm/min to 1mm/min, and the speed of upper feeding rod keeps identical with the speed of lower pumping rod;
When pull length arrives 35mm, stop heating, close induction heating power, stop pull, then close constant voltage dc source, suction pump remains in operation, until temperature measurer displays temperature is between 22 degrees Celsius to 25 degrees Celsius, close suction pump again, open fire door, take out the base alloy directionally solidified sample of Ti-Al.
Preferred: described hierarchical loading power is specially: the initial voltage of loading is 50V, then raise 10V every 2min, until the voltage loaded reaches 100V, finally in conjunction with the temperature regulation voltage level of thermopair display, make temperature stabilization at 1600 DEG C.
Preferred: the base alloy directionally solidified sample of described Ti-Al is the alloy directionally solidified sample of Ti-48Al-2Cr-2Nb, the female ingot of its alloy adopts consumable arc-melting stove to carry out melting and obtains, after melting casting, make the ingot casting that diameter is 150mm, recycling line cutting technology cuts from the female ingot of alloy the charge bar that diameter is 14.5mm.
Preferred: the speed of described lower pumping rod is 0.6mm/min or 1mm/min.
The present invention compared with prior art has following effect: the invention solves cannot impressed current is introduced in directional solidification process problem, and cannot determine to introduce the problem of voltage swing, for Ti-Al base alloy provides foundation in actual use.
Accompanying drawing explanation
Fig. 1 is the base alloy directionally solidified experimental facilities schematic diagram of Ti-Al under DC current effect of the present invention;
Fig. 2 is with corundum (Al
2o
3) the directional solidification assay maps of Ti-Al base alloy prepared of formwork;
Fig. 3 is with yttria (Y
2o
3) the directional solidification assay maps of Ti-Al base alloy prepared of formwork;
Fig. 4 is withdrawing rate Ti-48Al-2Cr-2Nb alloy directionally solidified tissue stabilization vitellarium tissue topography when being 1.0mm/min;
Fig. 5 is withdrawing rate Ti-48Al-2Cr-2Nb alloy directionally solidified tissue stabilization vitellarium tissue topography when being 0.6mm/min;
In figure: the upper feeding rod of 1-, 2-gas inlet and outlet, 3-insulating glass fibers cloth, 4-load coil, 5-graphite cannula, 6-cooling bath, 7-cooling liquid state metal, pumping rod under 8-, 9-positive pole molybdenum filament, 10-constant voltage dc source, 11-negative pole molybdenum filament, the base alloy directionally solidified sample of 12-Ti-Al, 13-directional solidification body of heater, 14-formwork, 15-thermopair, 16-temperature measurer, 17-vacuum pump, 18-argon gas gas injection pump, 19-three-way valve, 20-graphite felt, 21-water pump, 22-circulating water pipe.
Embodiment
Elaborate the preferred embodiment of the present invention with reference to the accompanying drawings below.
Embodiment one: composition graphs 1 illustrates present embodiment: the base alloy directionally solidified experimental facilities of Ti-Al under the DC current effect of present embodiment comprises feeding rod 1, gas inlet and outlet 2, insulating glass fibers cloth 3, load coil 4, graphite cannula 5, cooling bath 6, cooling liquid state metal 7, lower pumping rod 8, directional solidification body of heater 13, formwork 14, thermopair 15, temperature measurer 16, vacuum pump 17, argon gas gas injection pump 18, three-way valve 19, graphite felt 20, circulating water pipe 22 and water pump 21, the upper portion side wall of described directional solidification body of heater 13 is fitted with gas inlet and outlet 2, the outer end of gas inlet and outlet 2 is communicated with argon gas gas injection pump 18 with vacuum pump 17 by three-way valve 19, the roof of described body of heater 13 is fitted with feeding rod 1, the lower end of upper feeding rod 1 is connected with insulating glass fibers cloth 3, described cooling bath 6 is arranged on the base plate of directional solidification body of heater 13, cooling liquid state metal 7 is marked with in cooling bath 6, it is inner that the upper end of lower pumping rod 8 is placed in directional solidification body of heater 13 through the bottom of directional solidification body of heater 13, described graphite felt 20 is arranged in directional solidification body of heater 13, described graphite felt 20 has center pit, the lower end of formwork 14 is connected with lower pumping rod 8 through center pit, the base alloy directionally solidified sample 12 of Ti-Al is arranged in formwork 14, graphite cannula 5 and load coil 4 are enclosed within formwork 14 from inside to outside successively, one end of thermopair 15 contacts with the base alloy directionally solidified sample 12 of Ti-Al, the sidewall that the other end of thermopair 15 passes directional solidification body of heater 13 is connected with temperature measurer 16, circulating water pipe 22 is communicated with water pump 21,
The base alloy directionally solidified experimental facilities of Ti-Al under described DC current effect also comprises positive pole molybdenum filament 9, constant voltage dc source 10 and negative pole molybdenum filament 11, one end of described positive pole molybdenum filament 9 is connected with the upper end of the base alloy directionally solidified sample 12 of Ti-Al, insulating glass fibers cloth 3 is connected with positive pole molybdenum filament 9, the sidewall that the other end of positive pole molybdenum filament 9 passes directional solidification body of heater 13 is connected with constant voltage dc source 10, one end of negative pole molybdenum filament 11 is connected with Ti-Al base alloy directionally solidified sample 12 lower end through formwork 14, the sidewall that the other end of negative pole molybdenum filament 11 passes directional solidification body of heater 13 is connected with constant voltage dc source 10.
Further: the diameter of described positive pole molybdenum filament 9 and negative pole molybdenum filament 11 is 1mm.In experiment be adopt resistant to elevated temperatures diameter be 1mm molybdenum filament introduce.Additionally by experimental verification single turn positive pole molybdenum filament 9 and the maximum DC current can introducing 15A of negative pole molybdenum filament 11, can increase by the number of turn increasing positive pole molybdenum filament 9 and negative pole molybdenum filament 11 maximal value introducing electric current.
Further: described formwork 14 is yttrium oxide shuttering.Before TiAl-base alloy directional solidification experiment under the function of current, need first obtaining the TiAl-base alloy oriented specimen under no current effect, because the chemical activity of TiAl-base alloy melt is very high, so can, with all die casing material generation chemical reactions used at present, cause alloy surface and inside to be polluted under the condition of high temperature.For obtaining the oriented freezing organization of TiAl-base alloy under the condition of this experiment respectively to corundum (Al
2o
3) formwork and yttria (Y
2o
3) formwork tests, obtain result as shown in Figures 2 and 3, can find that the middle part of the directional solidification sample of the Ti-Al base alloy prepared with corundum formwork forms comparatively gross blow hole, and run through whole sample, and there is no pore with sample prepared by yttrium oxide shuttering.The appearance of pore is not only bad for the carrying out of directional solidification, and the experiment of the TiAl-base alloy directional solidification under the function of current can be made in experimentation to form open circuit, impressed current is caused to load unsuccessfully, thus causing the failure of an experiment, the TiAl-base alloy directional solidification experiment therefore carried out under the function of current with corundum formwork is infeasible.Yttrium oxide shuttering is prepared sample and is not formed pore, is because yttria has higher thermodynamic stability, so use yttrium oxide shuttering to ensure, TiAl-base alloy directional solidification tests carries out smoothly.
Further: described vacuum pump 17 is oil-sealed rotary pump.
Further: described cooling bath 6 is gallium indium cooling bath.
Further: described cooling liquid state metal 7 is gallium indium liquid coolant.
Further: the base alloy directionally solidified sample of described Ti-Al is the alloy directionally solidified sample of Ti-48Al-2Cr-2Nb, the female ingot of its alloy adopts consumable arc-melting stove to carry out melting and obtains, after melting casting, make the ingot casting that diameter is 150mm, recycling line cutting technology cuts from the female ingot of alloy the charge bar that diameter is 14.5mm.
Embodiment two: composition graphs 1 to Fig. 5 illustrates present embodiment, the base alloy directionally solidified experimental technique of Ti-Al under the DC current effect of present embodiment realizes based on the experimental facilities in embodiment one, and concrete steps are:
Step one: load the base alloy directionally solidified sample of Ti-Al in directional solidification furnace, close directional solidification furnace door, open vacuum pump, air in discharge directional solidification furnace is to directional solidification furnace pressure at below 5Pa, and then passing into argon gas to directional solidification furnace pressure is 300Pa, again vacuumizes, repetition like this twice, to guarantee that furnace interior air is drained, finally passing into argon gas to directional solidification furnace pressure is 300Pa, closes oil-sealed rotary pump;
Step 2: open cool cycles water pipe, starts suction pump, opens induction heating power, hierarchical loading power, when temperature measurer displays temperature is 1600 DEG C, stops continuing to increase power, is then incubated 5min;
Step 3: start constant voltage dc source, setting output voltage is 5V to 15V, and the speed of the lower pumping rod of setting is 0.6mm/min to 1mm/min, and the speed of upper feeding rod keeps identical with the speed of lower pumping rod;
When pull length arrives 35mm, stop heating, close induction heating power, stop pull, then close constant voltage dc source, suction pump remains in operation, until temperature measurer displays temperature is between 22 degrees Celsius to 25 degrees Celsius, close suction pump again, open fire door, take out the base alloy directionally solidified sample of Ti-Al.
Further: described hierarchical loading power is specially: the initial voltage of loading is 50V, then raise 10V every 2min, until the voltage loaded reaches 100V, finally in conjunction with the temperature regulation voltage level of thermopair display, make temperature stabilization at 1600 DEG C.
Further: the base alloy directionally solidified sample of described Ti-Al is the alloy directionally solidified sample of Ti-48Al-2Cr-2Nb, the female ingot of its alloy adopts consumable arc-melting stove to carry out melting and obtains, after melting casting, make the ingot casting that diameter is 150mm, recycling line cutting technology cuts from the female ingot of alloy the charge bar that diameter is 14.5mm.
Further: the speed of described lower pumping rod is 0.6mm/min or 1mm/min.
Be under the condition of 1600 DEG C in heating-up temperature, do not obtain oriented freezing organization column crystal when first carrying out the directional solidification experiment of Ti-48Al-2Cr-2Nb alloy with the withdrawing rate of 1.0mm/min, as shown in Figure 4.According to metal freezing principle, obtain the constitutional supercooling that oriented freezing organization must suppress solid-liquid interface front end, in view of the rising with heating-up temperature, Ti-Al base alloy and formwork react strong with regard to Shaoxing opera, so adopt the mode of the withdrawing rate (i.e. growth rate) that slows down when identical thermograde to promote the formation of columanar structure.When withdrawing rate drops to 0.6mm/min, obtain columanar structure as shown in Figure 5.
The exemplary illustration of present embodiment just to this patent, does not limit its protection domain, and those skilled in the art can also change, as long as no the Spirit Essence exceeding this patent, in the protection domain of this patent its local.
Claims (9)
1. the base alloy directionally solidified experimental facilities of Ti-Al under DC current effect, it comprises feeding rod (1), gas inlet and outlet (2), insulating glass fibers cloth (3), load coil (4), graphite cannula (5), cooling bath (6), cooling liquid state metal (7), lower pumping rod (8), directional solidification body of heater (13), formwork (14), thermopair (15), temperature measurer (16), vacuum pump (17), argon gas gas injection pump (18), three-way valve (19), graphite felt (20), circulating water pipe (22) and water pump (21), the upper portion side wall of described directional solidification body of heater (13) is fitted with gas inlet and outlet (2), the outer end of gas inlet and outlet (2) is communicated with argon gas gas injection pump (18) with vacuum pump (17) by three-way valve (19), the roof of described body of heater (13) is fitted with feeding rod (1), the lower end of upper feeding rod (1) is connected with insulating glass fibers cloth (3), described cooling bath (6) is arranged on the base plate of directional solidification body of heater (13), cooling liquid state metal (7) is marked with in cooling bath (6), it is inner that the upper end of lower pumping rod (8) is placed in directional solidification body of heater (13) through the bottom of directional solidification body of heater (13), described graphite felt (20) is arranged in directional solidification body of heater (13), described graphite felt (20) has center pit, the lower end of formwork (14) is connected with lower pumping rod (8) through center pit, the base alloy directionally solidified sample of Ti-Al (12) is arranged in formwork (14), graphite cannula (5) and load coil (4) are enclosed within formwork (14) from inside to outside successively, one end of thermopair (15) contacts with the base alloy directionally solidified sample of Ti-Al (12), the sidewall that the other end of thermopair (15) passes directional solidification body of heater (13) is connected with temperature measurer (16), circulating water pipe (22) is communicated with water pump (21),
It is characterized in that: the base alloy directionally solidified experimental facilities of Ti-Al under described DC current effect also comprises positive pole molybdenum filament (9), constant voltage dc source (10) and negative pole molybdenum filament (11), one end of described positive pole molybdenum filament (9) is connected with the upper end of the base alloy directionally solidified sample of Ti-Al (12), insulating glass fibers cloth (3) is connected with positive pole molybdenum filament (9), the sidewall that the other end of positive pole molybdenum filament (9) passes directional solidification body of heater (13) is connected with constant voltage dc source (10), one end of negative pole molybdenum filament (11) is connected with the base alloy directionally solidified sample of Ti-Al (12) lower end through formwork (14), the sidewall that the other end of negative pole molybdenum filament (11) passes directional solidification body of heater (13) is connected with constant voltage dc source (10), the base alloy directionally solidified sample of Ti-Al is the alloy directionally solidified sample of Ti-48Al-2Cr-2Nb.
2. the base alloy directionally solidified experimental facilities of Ti-Al under DC current effect according to claim 1, is characterized in that: the diameter of described positive pole molybdenum filament (9) and negative pole molybdenum filament (11) is 1mm.
3. the base alloy directionally solidified experimental facilities of Ti-Al under DC current effect according to claim 1, is characterized in that: described formwork (14) is yttrium oxide shuttering.
4. the base alloy directionally solidified experimental facilities of Ti-Al under the DC current effect according to claim 1,2 or 3, is characterized in that: described vacuum pump (17) is oil-sealed rotary pump.
5. the base alloy directionally solidified experimental facilities of Ti-Al under DC current effect according to claim 4, is characterized in that: described cooling bath (6) is gallium indium cooling bath; Described cooling liquid state metal (7) is gallium indium liquid coolant.
6., based on the base alloy directionally solidified experimental technique of Ti-Al under the DC current effect of the base alloy directionally solidified experimental facilities of the Ti-Al under DC current effect described in claim 1, it is characterized in that: concrete steps are:
Step one: load the base alloy directionally solidified sample of Ti-Al in directional solidification furnace, close directional solidification furnace door, open vacuum pump, discharge air in directional solidification furnace to directional solidification furnace pressure at below 5Pa, then passing into argon gas to directional solidification furnace pressure is 300Pa, again vacuumize, repetition like this twice, finally passing into argon gas to directional solidification furnace pressure is 300Pa, close oil-sealed rotary pump, the base alloy directionally solidified sample of Ti-Al is the alloy directionally solidified sample of Ti-48Al-2Cr-2Nb;
Step 2: open cool cycles water pipe, starts suction pump, opens induction heating power, hierarchical loading power, when temperature measurer displays temperature is 1600 DEG C, stops continuing to increase power, is then incubated 5min;
Step 3: start constant voltage dc source, setting output voltage is 5V to 15V, and the speed of the lower pumping rod of setting is 0.6mm/min to 1mm/min, and the speed of upper feeding rod keeps identical with the speed of lower pumping rod;
When pull length arrives 35mm, stop heating, close induction heating power, stop pull, then close constant voltage dc source, suction pump remains in operation, until temperature measurer displays temperature is between 22 DEG C to 25 DEG C, close suction pump again, open fire door, take out the base alloy directionally solidified sample of Ti-Al.
7. the base alloy directionally solidified experimental technique of Ti-Al under DC current effect according to claim 6, it is characterized in that: hierarchical loading power is specially: the initial voltage of loading is 50V, then 10V is raised every 2min, until the voltage loaded reaches 100V, finally in conjunction with the temperature regulation voltage level of thermopair display, make temperature stabilization at 1600 DEG C.
8. the base alloy directionally solidified experimental technique of Ti-Al under DC current effect according to claim 7, it is characterized in that: the alloy directionally solidified sample of described Ti-48Al-2Cr-2Nb, the female ingot of its alloy adopts consumable arc-melting stove to carry out melting and obtains, after melting casting, make the ingot casting that diameter is 150mm, recycling line cutting technology cuts from the female ingot of alloy the charge bar that diameter is 14.5mm.
9. the base alloy directionally solidified experimental technique of Ti-Al under DC current effect according to claim 8, is characterized in that: the speed of described lower pumping rod is 0.6mm/min or 1mm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310449586.5A CN103472085B (en) | 2013-09-29 | 2013-09-29 | The base alloy directionally solidified experimental facilities of Ti-Al under DC current effect and experimental technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310449586.5A CN103472085B (en) | 2013-09-29 | 2013-09-29 | The base alloy directionally solidified experimental facilities of Ti-Al under DC current effect and experimental technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103472085A CN103472085A (en) | 2013-12-25 |
| CN103472085B true CN103472085B (en) | 2016-03-09 |
Family
ID=49797024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310449586.5A Active CN103472085B (en) | 2013-09-29 | 2013-09-29 | The base alloy directionally solidified experimental facilities of Ti-Al under DC current effect and experimental technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103472085B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569031B (en) * | 2014-12-26 | 2017-06-13 | 广东工业大学 | For the experimental provision and method of nano-fluid directional solidification |
| CN107153025A (en) * | 2016-03-03 | 2017-09-12 | 中南大学 | Device prepared by the high flux of the high flux preparation method of material, its application and material |
| CN113846278B (en) * | 2021-09-23 | 2022-06-21 | 哈尔滨工业大学 | Method for preparing oriented TiAl-based alloy by utilizing device for preparing oriented TiAl-based alloy through solid-state phase transition |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1733391A (en) * | 2005-09-02 | 2006-02-15 | 哈尔滨工业大学 | Directional freeze method for TiAl-based alloy plate |
| CN101653825A (en) * | 2009-09-24 | 2010-02-24 | 哈尔滨工业大学 | High-pressure counter-pressure casting method of Al-5 percent Cu base alloy |
| CN102011078A (en) * | 2010-12-23 | 2011-04-13 | 哈尔滨工业大学 | Method for refined and directional solidification of titanium aluminium alloy slab surface structure |
| CN102672150A (en) * | 2012-05-14 | 2012-09-19 | 北京科技大学 | Direct control method for titanium-aluminum-niobium alloy lamellar structure |
-
2013
- 2013-09-29 CN CN201310449586.5A patent/CN103472085B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1733391A (en) * | 2005-09-02 | 2006-02-15 | 哈尔滨工业大学 | Directional freeze method for TiAl-based alloy plate |
| CN101653825A (en) * | 2009-09-24 | 2010-02-24 | 哈尔滨工业大学 | High-pressure counter-pressure casting method of Al-5 percent Cu base alloy |
| CN102011078A (en) * | 2010-12-23 | 2011-04-13 | 哈尔滨工业大学 | Method for refined and directional solidification of titanium aluminium alloy slab surface structure |
| CN102672150A (en) * | 2012-05-14 | 2012-09-19 | 北京科技大学 | Direct control method for titanium-aluminum-niobium alloy lamellar structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103472085A (en) | 2013-12-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103472085B (en) | The base alloy directionally solidified experimental facilities of Ti-Al under DC current effect and experimental technique | |
| CN104209499B (en) | Low frequency pulsed magnet field fine-grain solidification method for causing melt oscillation through electromagnetic force | |
| CN105506326A (en) | Preparation method of long-period-structure-reinforced magnesium-zirconium alloy ingot | |
| CN105499523A (en) | Pouring device for metal smelting and pouring method | |
| CN104308134A (en) | High-frequency vacuum induction melting device and amorphous alloy melting method employing same | |
| CN104550805A (en) | Device and method for preparing magnesium alloy ingot blank for deformation | |
| CN103817313B (en) | A kind of preparation method of integral fine crystal radial impeller foundry goods | |
| CN103882185A (en) | High-pressure bottom-blowing refining casting device and method for smelting high-nitrogen steel by using same | |
| CN104294066A (en) | Rapid solidification preparation method of ultrahigh-strength plasticity TiNiNbMo shape memory alloy | |
| CN107557840A (en) | A kind of magnesium alloy differential arc oxidation technique | |
| CN103276231B (en) | Method for removing S and O from cast superalloy by vacuum induction smelting | |
| CN102818454A (en) | Composite crucible with advantages of energy saving, low cost and capability of being alloyed | |
| CN104593630A (en) | Directional solidifying preparation method of lotus-shaped porous aluminum | |
| CN105543546B (en) | Technology for smelting and casting C18150 alloy under atmosphere condition | |
| CN205099767U (en) | Electrolytic cell assembly with extensive rare refractory metal of continuous production | |
| CN106957986A (en) | A kind of high-ductility magnetostriction materials and preparation method thereof | |
| CN111621815A (en) | Short-process method for preparing low-oxygen high-purity rare earth metal | |
| CN204262337U (en) | A kind of silver alloy vacuum-casting equipment | |
| CN114525420B (en) | Method for improving kilogram level AlCoCrFeNi by pulse current technology 2.1 Method for mechanical property of eutectic high-entropy alloy | |
| CN206337297U (en) | Titan alloy casting ingot consumable electrode vacuum furnace | |
| CN107699925B (en) | The fused salt electroforming preparing process of rhenium | |
| CN105057606B (en) | A kind of method for improving Cleanliness of Molten Steel and crystal grain thinning | |
| CN206392838U (en) | Electromagnetic agitation vacuum casting system | |
| CN214148807U (en) | Vacuum arc furnace suction casting and magnetic stirring structure | |
| CN104975197A (en) | Rare-earth magnesium alloy preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |