CN85104151B - Producing method for dual-direction driving element of temp.-control blind of space craft - Google Patents
Producing method for dual-direction driving element of temp.-control blind of space craftInfo
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- CN85104151B CN85104151B CN85104151A CN85104151A CN85104151B CN 85104151 B CN85104151 B CN 85104151B CN 85104151 A CN85104151 A CN 85104151A CN 85104151 A CN85104151 A CN 85104151A CN 85104151 B CN85104151 B CN 85104151B
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- temperature
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Abstract
The present invention relates to a bidirectional drive element of a temperature control shutter suitable for an aerospace vehicle and a manufacturing process of the bidirectional drive element. The element is made of Ni-Ti binary alloy, the alloy comprises 50.6% to 50.8% (atomic ratio) of Ni, and the rest part is Ti. An alloy belt material is loaded and shaped at the temperature higher than Ms, treated in high temperature with loads, treated in low temperature with loads and unloaded at 0 DEG C to obtain form bidirectional memory effect. The element has the advantages of light weight, small volume, large driving force and small thermal hysteresis; the element can enhance the thermal heat of a shutter, reduce action chamber volume, enhance thermal efficiency and save energy.
Description
The invention relates to the manufacture method of a kind of bi-directional drive element of aerospace vehicle temperature control louver use.
At present, aircraft temperature control louver driver element adopts bimetallic material to manufacture mostly, and its principle is to utilize two kinds of metallic material coefficient of expansion differences, by the difference generation driving action of temperature susceptibility.Its shortcoming is that component structure is heavy, efficient is low, thermo-lag is big.The purpose of this invention is to provide a kind of novel driver element, replace bimetallic element.This novel driver element is a kind of bi-directional drive element with two-way memory effect of manufacturing with nickel-titanium shape memory alloy.Promptly when temperature changed from high to low or from low to high, element can be another kind of shape by a kind of transfer of shapes spontaneously to so-called bi-directional drive, so just can drive louver and open or close.This element has two-way memory effect, remembers a kind of shape when high temperature, remembers another kind of shape when the low-temperature martensite state, and element just changes shape automatically when temperature traverse.The advantage of this novel driver element provided by the invention is that volume is little, in light weight, intensity is high, corrosion stability and high abrasion resistance, highly sensitive, thermo-lag is little, propulsive effort is big.
This novel driver element provided by the invention is manufactured with nickel-titanium shape memory alloy, this alloy contains the nickel that atomic ratio is 50.6%-50.8%, surplus is a titanium, alloy is smelted into ingot one time by vacuum furnace earlier, again through the induction furnace remelting, alloy carries out uniformization and handles under 900-1000 ℃ of temperature then, is rolled into the thin strip that thickness is the 0.3-0.4 millimeter again after forging into square billet under 850-950 ℃ of temperature, cut into width again and be 8 millimeters tape, be the blank of processing driver element.
The preparation method of element is: tape annealed under 350-500 ℃ of temperature eliminate partly stress earlier, and easily deformable to guarantee material, and be easy to produce stress-induced martensite, this temperature is the treatment temperature of giving of element.More than alloy Ms temperature, the tape bend fixing become element (snail shape) then, band is loaded under the 500-600 ℃ of temperature and carries out high-temperature treatment subsequently, again band is carried element and put into cryogenic media (5-0 ℃), at last 0 ℃ of unloading, this moment, element promptly obtained two-way memory effect.
The control deflection is 8-10% during the element typing, make the element internal tissue produce stress-induced martensite, the high-temperature treatment of short time makes the martensite in the element become high temperature B2 phase by the track reverse that retrains, with the fixing shape of high temperature phase, a band year cooling makes the interior martensitic stucture oriented growth of element and grows up, therefore, when element cools off, martensitic stucture in the element changes the abnormal tissue of mono-martensite into according to the abnormal phase transformation law of mono-, the deformation (low temperature shape) when finishing martensitic state.Element restores to the original state according to reverse becoming rule during intensification, the two-way memory effect of Here it is element.
This Ni-Ti memorial alloy bi-directional drive element provided by the invention weighs 4 grams, and 29 millimeters of external diameters, face bimetallic element weigh 28 grams, 40 millimeters of external diameters.This bi-directional drive element weight provided by the invention only is 1/7 of bimetallic element, and volume only is 3/5 of a bimetallic element.
In light weight, volume is little significant concerning the thermal design of aerospace vehicle, can not only improve the thermal behavior of louver, can also reduce the volume of operating chamber, reduces the thermal leakage ratio of operating chamber thereupon, improves heat efficiency, saves energy resource consumption.
This Ni-Ti bi-directional drive element provided by the invention is in the alteration of form process, the restoring force that produces is far longer than the power that bimetallic element produces, during as half-twist, 6.8 kilograms of millimeters of Ni-Ti driver element work done, and bimetallic element acting only is 1.3 kilograms of millimeters, is 5.2 times of bimetallic element.
The two-way memory effect sensitivity of this bi-directional drive element provided by the invention, stable, through more than 20,000 thermal cycling tests, element rotational angle and sensitivity are unaffected.(ρ-T) curve has accurately been determined the M of element by electrical resistivity and temperature
SThe point temperature is-2 ℃, and As point temperature is 3 ℃.Electrical resistivity when having measured the electrical resistivity Ms temperature of high low temperature phase is 87.3 μ Ω-cm, and the electrical resistivity during the As temperature is 82.2 μ Ω-cm.The different piece of curve has shown different crystal structure characteristics, and find bi-directional drive element ρ-T curve by low temperature during to pyrolytic conversion the ρ peak value tangible broadening phenomenon is arranged, the phenomenon proof has residual martensite to exist in this range of temperatures like this, and this is the foundation of two-way memory effect sensitivity.At LN
2The ρ curve generally rises in (liquid nitrogen) environment, and low-temperature space has tangible martensite to transform phenomenon.Accompanying drawing is that (ρ-T) curve and angle-temperature (O-T) curve, having confirmed that ρ varies with temperature recovers angle with shape and have closely and link, and has corresponding relation mutually for the electrical resistivity-temperature of bi-directional drive element.As 1. some place, a line shows point of transition, i.e. B when cooling
2→ R changes starting point mutually.The b line is θ standard-sized sheet → complete shut-down operating point (16 ℃ time).2. some place, a line is R → R+B
19Phase transition point (being Ms), b line show θ angle trend complete shut-down.3. the some a of place line shows B
19+ R → R phase transition point (As), the b line shows the operating point by complete shut-down → standard-sized sheet.4. the some a of place line shows R → B
2Phase transition point, b line show θ angle standard-sized sheet.
ρ-T, the standard-sized sheet of θ-T curve proof bi-directional drive element is consistent with complete shut-down temperature and change in resistance, and the operating temperature district of proof element just alloy give the martensite stage and present the district, so advantage such as that element possesses is highly sensitive, thermo-lag is little, be swift in motion.
Claims (1)
1, a kind of aerospace vehicle temperature control louver driver element manufacture method, it is characterized in that this element manufactures with nickel-titanium shape memory alloy, this alloy contains the nickel that atomic ratio is 50.6%-50.8%, surplus is a titanium, alloy is smelted into ingot one time by vacuum furnace earlier, again through the induction furnace remelting, then, alloy carries out uniformization under 900-1000 ℃ of temperature handles, under 850-950 ℃ of temperature, be rolled into thin strip again after forging into square billet, cut into tape again, described alloy tape is annealed under 350-500 ℃ of temperature, more than alloy Ms temperature the tape bend fixing is become element again, deflection is controlled in the 8-10% scope during element typing, band is loaded under the 500-600 ℃ of temperature and carries out high-temperature treatment then, again band is carried element and quenches in-5 ℃-0 ℃ the cryogenic media, at last 0 ℃ of unloading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85104151A CN85104151B (en) | 1985-06-04 | 1985-06-04 | Producing method for dual-direction driving element of temp.-control blind of space craft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85104151A CN85104151B (en) | 1985-06-04 | 1985-06-04 | Producing method for dual-direction driving element of temp.-control blind of space craft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85104151A CN85104151A (en) | 1986-12-03 |
| CN85104151B true CN85104151B (en) | 1988-04-27 |
Family
ID=4793662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85104151A Expired CN85104151B (en) | 1985-06-04 | 1985-06-04 | Producing method for dual-direction driving element of temp.-control blind of space craft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85104151B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343309B (en) * | 2013-06-26 | 2015-07-01 | 西安赛特金属材料开发有限公司 | Method for manufacturing memory alloy spacecraft unlocking drive element |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111060210B (en) * | 2019-12-20 | 2021-06-29 | 佛山科学技术学院 | Double-temperature alarm and preparation method thereof |
-
1985
- 1985-06-04 CN CN85104151A patent/CN85104151B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343309B (en) * | 2013-06-26 | 2015-07-01 | 西安赛特金属材料开发有限公司 | Method for manufacturing memory alloy spacecraft unlocking drive element |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85104151A (en) | 1986-12-03 |
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