CN1614055A - Low-phase point-variable high-strength TiNiFeMo marmem and use as pipe joint thereof - Google Patents
Low-phase point-variable high-strength TiNiFeMo marmem and use as pipe joint thereof Download PDFInfo
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- CN1614055A CN1614055A CN 200410096782 CN200410096782A CN1614055A CN 1614055 A CN1614055 A CN 1614055A CN 200410096782 CN200410096782 CN 200410096782 CN 200410096782 A CN200410096782 A CN 200410096782A CN 1614055 A CN1614055 A CN 1614055A
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Abstract
The invention was involved in low transformation temperature high intensity TiNiFeMo shape memory alloy and its application of pipe joint. This alloy consist of 0.1%-4% Fe, 0.1%-5% Mo, 45%-50% Ti and 45%-50% Ni. The alloy was melted and forged into bar and was produced into the structure and shape requested by mechanical methods. Such pipe joints could be augmented to join all kinds of pipes under the room temperature, even at -196deg.C. Pipes can be tightly seized up by the pipe joints, when they are returned to the room temperature naturally, so that non-leakage achieved. The pipe joints have the advantages, such as lightweight, high pressure-resistant, and fine safe reliability.
Description
Technical field
The present invention relates to a kind of tube stub and a kind of low-phase point-variable high-strength TiNiFeMo marmem material that can under low temperature environment, be used for connecting between the pressure duct.
Background technology
At present, in each pipeline of Aeronautics and Astronautics, air-conditioning, petroleum pipe line hydraulic pressure and gas circuit etc. is connected, mostly adopt the tube stub of traditional steel design.And between each pipeline owing to be subjected to the influence of factors such as mechanical vibration, high temperature, hyperbaric environment, faults such as leakage of oil, gas leakage appear easily, make the mechanical means can't works better.
TiNi base marmem (SMA) is as a kind of novel metal functional materials, the stable and control easily of transformation temperature because of its martensitic transformation, and has excellent mechanical property, good anti-corrosion and big shape memory effect and be widely used in fields such as medical treatment, industry, life.
On the basis of TiNi base marmem,, prepare low-phase point-variable high-strength TiNiFe marmem by dosing the transformation temperature that highly purified metallic iron (Fe) unit usually reduces alloy.
Yet, along with science and technology development, flight velocity to aircraft such as Aeronautics and Astronautics is also more and more faster, the pressure that piping system is born is more and more higher simultaneously, and low-phase point-variable high-strength TiNiFe marmem is because tensile strength (σ b) and yield strength (σ s) are relatively low, can not satisfy the requirement of high-pressure work pressure connection fully, therefore the needs research and development are a kind of has low transformation temperature and high strength TiNi base marmem and adopts this alloy manufacturing tube stub to satisfy the more requirement of high workload pressure.
On the basis of the TiNiFe shape memory alloy that hangs down transformation temperature, the TiNiFeMo shape memory alloy of dosing a spot of metal molybdenum (Mo) element preparation again not only has low transformation temperature but also intensity also is improved, and adopts the tube stub of this shape memory alloy manufacturing to have higher clamping force.Adopt the tube stub of this shape memory alloy manufacturing to replace traditional steel tube stub not only to alleviate the weight of member, and make and the member safety and reliability make the over-all properties of total system obviously improve, bring huge social and economic benefit.
Summary of the invention
One of purpose of the present invention provides a kind of low-phase point-variable high-strength TiNiFeMo marmem material.This alloy material has characteristics such as transformation temperature is low, intensity is high, corrosion-resistant.
Two of purpose of the present invention provides a kind of tube stub that connects between each pipeline.This tube stub has and bears more high workload pressure, has not only that low transformation temperature but also intensity also are improved, big clamping force, and the tube stub of weight ratio steel design is light, and it is safe and reliable, and the piping system performance of whole mechanical means is obviously improved.
A kind of low-phase point-variable high-strength TiNiFeMo marmem of the present invention, its component and content are that 0.1%～4% iron (Fe), 0.1%～5% molybdenum (Mo), 45%～50% titanium (Ti) and 45%～50% nickel (Ni) are formed, all percentage ratios are atomic percent, and above-mentioned each components contents sum is 100%.After tested, the martensite of this low-phase point-variable high-strength TiNiFeMo marmem begins transformation temperature (Ms) and is extremely-200 ℃ of room temperatures, shape memory effect (SME) 4%～8%, room temperature tensile strength (σ b) is 600MPa～850MPa, room temperature yield strength (σ s) is 250MPa～550MPa, and room temperature unit elongation (δ) is 10.0%～30.0%.
Described low-phase point-variable high-strength TiNiFeMo marmem can be that component is Ti
50Ni
48Mo
1.5Fe
0.5Shape memory alloy or Ti
50Ni
47Mo
1.5Fe
1.5Shape memory alloy.
Low-phase point-variable high-strength TiNiFeMo marmem of the present invention can adopt machining process to make the tube stub that is used for connecting tube.
Described low-phase point-variable high-strength TiNiFeMo marmem tube stub, smooth section two ends of its tube stub are provided with contraction section, can be provided with muscle in smooth section; Perhaps, can be smooth flat in smooth section.
Described low-phase point-variable high-strength TiNiFeMo marmem tube stub, its structure is a pipe shape, is provided with muscle in the tube stub.
Described low-phase point-variable high-strength TiNiFeMo marmem tube stub carries out reaming in room temperature to-196 ℃ the low temperature environment and is connected with each pipe fitting.
Described low-phase point-variable high-strength TiNiFeMo marmem tube stub can be used for the hydraulic pressure of Aeronautics and Astronautics, air-conditioning, petroleum pipe line and being connected of each pipe fitting of air-channel system.
Described low-phase point-variable high-strength TiNiFeMo marmem tube stub, suitable envrionment temperature are one 55 ℃～+ 500 ℃, and the operating pressure that is suitable for is 10MPa～35MPa.
Advantage of the present invention: on the basis of TiNi shape memory alloy, by adding a certain amount of iron (Fe) and molybdenum (Mo) element, prepare the low high-intensity TiNiFeMo shape memory alloy of transformation temperature, the martensite of this alloy begins transformation temperature (Ms) point extremely-200 ℃ of room temperatures, room temperature tensile strength (σ b) is greater than 780MPa, and room temperature yield strength (σ s) is greater than 500MPa.The marmem pipe joint that uses this alloy to make carries out reaming in room temperature to-196 ℃ the low temperature environment and is connected with each pipe fitting, and when temperature is returned to room temperature naturally, tube stub will be held connected each pipe fitting tightly.The weight of this marmem pipe joint is 20～25% of conventional steel structural pipe joint weight, has in light weightly, bears the pressure height, the advantage that safe reliability is good.
Description of drawings
Fig. 1 is a kind of schematic appearance of tube stub of the present invention.
Fig. 2 is the sectional view of Fig. 1.
Fig. 3 is the sectional view of another structure of Fig. 1.
Fig. 4 is the another kind of schematic appearance of tube stub of the present invention.
Fig. 5 is the sectional view of Fig. 4.
Fig. 6 is the contrast photo of conventional steel structural pipe joint (a) and TiNiFeMo marmem pipe joint (b).
Among the figure: 1. 3. smooth sections 4. muscle of tube stub 2. contraction sections
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
A kind of low-phase point-variable high-strength TiNiFeMo marmem of the present invention, be on the basis of TiNi base marmem, usually reduce the transformation temperature of alloy and improve alloy strength by dosing highly purified metallic iron (Fe) and molybdenum (Mo) unit, utilize the memory principle of shape memory alloy, be made into the TiNiFeMo marmem pipe joint, to replace traditional steel design tube stub, make aviation, space flight, air-conditioning, the piping system of part such as the hydraulic pressure of petroleum pipe line and gas circuit is more safe and reliable, but also can alleviate construction weight greatly, thereby improve the over-all properties of whole member, thereby bring huge social and economic benefit.
In the present invention, the component of low-phase point-variable high-strength TiNiFeMo marmem and content are that 0.1%～4% iron (Fe), 0.1%～5% molybdenum (Mo), 45%～50% titanium (Ti) and 45%～50% nickel (Ni) are formed, all percentage ratios are atomic percent, and above-mentioned each components contents sum is 100%.
In the present invention, the making working method of low-phase point-variable high-strength TiNiFeMo marmem is:
(1) takes by weighing the titanium sponge (Ti) of purity 99.9% and nickel (Ni) and the metallic iron (Fe) of a small amount of purity 99.7% and the molybdenum (Mo) of purity 99.8% of purity 99.9% by proportioning;
(2) adopt non-consumable arc furnace to carry out melting above-mentioned alloying element, melting obtains TiNiFeMo shape memory alloy ingot casting;
(3) adopt 150 kilograms of forging hammers to forge into needed bar or sheet material (sheet material is used for testing its alloy property) on the above-mentioned ingot casting that makes;
(4) above-mentioned sheet material is adopted low temperature differential scanning calorimeter (DSC) or electrical resistance method measure the temperature of the transformation temperature of alloy, the temperature range of measurement is from-190 ℃ to 20 ℃, and temperature rate is 1 ℃/min; Adopt the material mechanical performance trier to carry out Mechanics Performance Testing.
After tested, low-phase point-variable high-strength TiNiFeMo marmem material of the present invention, its martensite begins transformation temperature (Ms) and is extremely-200 ℃ of room temperatures, shape memory effect (SME) 4%～8%, room temperature tensile strength (σ b) is 600MPa～850MPa, room temperature yield strength (σ s) is 250MPa～550MPa, and room temperature unit elongation (δ) is 10.0%～30.0%.
Low-phase point-variable high-strength TiNiFeMo marmem material of the present invention is made tube stub, adopt conventional machining process can produce required tube stub part.The tube stub that makes need carry out reaming to tube stub to-196 ℃ the low temperature environment in room temperature and connect with the pipe fitting that need be connected and get final product.Because the memory characteristic that the tube stub that the TiNiFeMo shape memory alloy is made has, when temperature is returned to room temperature naturally, tube stub will be held each pipeline of connection tightly, reach close-connected effect and leakage of oil or disappointing problem in use not occur.
Machining process generally is meant bar is carried out car, clamps, mills, makes the required structure and the working method of shape behind the plane, grinder preface.At mechanical industry is means comparatively commonly used, so do not carry out too much explanation herein.
In the present invention, the structure of tube stub 1 can be general conventional pipe shape, but is provided with muscle 4 (as Fig. 4, shown in Figure 5) for the intensity that improves tube stub in tube stub 1.The tube stub 1 that is processed into pipe shape is to match for the shape with required each pipe fitting that is connected.The structure of tube stub 1 also can be to be made of smooth section 3 and contraction section 2, and contraction section 2 is located at smooth section 3 two ends.Can also be provided with muscle 4 (as Fig. 1, Fig. 2, shown in Figure 3) in smooth section 3, contraction section 2 is held tightly with required each pipe fitting that is connected.The contrast of conventional steel structural pipe joint and tube stub of the present invention as shown in Figure 6.
Make low transformation temperature high strength Ti
50Ni
48Fe
0.5Mo
1.5Marmem pipe joint
(1) with the titanium (Ti) of purity 99.9%, the nickel (Ni) of purity 99.9%, the molybdenum (Mo) of purity 99.8% and the iron (Fe) of purity 99.7%, put into non-consumable arc furnace, be smelted into TiNiFeMo shape memory alloy ingot casting 2700 ℃ of temperature, Ti, Ni, Fe, Mo atomic percentage conc are 50%, 48%, 0.5% and 1.5%.
(2) in fusion process, control Ti by the add-on that changes the Fe element
50Ni
48Fe
0.5Mo
1.5The temperature of the transformation temperature of shape memory alloy and performance;
In fusion process, control Ti by the add-on that changes the Mo element
50Ni
48Fe
0.5Mo
1.5The intensity of shape memory alloy and performance;
(3) the forging hammer forging and pressing that are C11-150 with the above-mentioned ingot casting employing model that makes are rolled into sheet material,
Adopt MTS-880 type universal material experimental machine to carry out the test of mechanical property and shape memory effect to the sheet material that makes, tensile strain rate is 0.8mm/min; The sheet material that makes is adopted electrical resistance method test transformation temperature, and the sheet material sample is got size 15mm * 1mm * 1mm;
Low transformation temperature high strength Ti
50Ni
48Fe
0.5Mo
1.5The every The performance test results of shape memory alloy is: martensite begins transformation temperature (Ms) and is-142 ℃, shape memory effect (SME) 5.3%, room temperature tensile strength (σ b) is 809.5MPa, and room temperature yield strength (σ s) is 529.3MPa, and room temperature unit elongation (δ) is 12.4%;
(4) the above-mentioned ingot casting that makes is forged into bar, adopt machining process to be processed into the tube stub part that has smooth section 3 and contraction section 2 as Fig. 1～shown in Figure 3, contraction section 2 is located at smooth section 3 two ends, can also be provided with muscle 4 (as shown in Figure 2) in smooth section 3, also can be slick plane (as shown in Figure 3) in smooth section 3, the face shaping of tube stub 1 as shown in Figure 1.Bar is adopted car in the machining process, clamps, mills, digs, grinds to add and require to process to get final product according to the size of workpiece man-hour.
(5) when connecting each pipeline, will hang down transformation temperature high strength Ti earlier
50Ni
48Mo
1.5Fe
0.5Marmem pipe joint is put into liquid nitrogen and is stopped and carried out reaming in 3～5 minutes, takes out then, carries out pipeline at once and connects.Because shape memory alloy material has memory principle, when temperature is returned to room temperature naturally, tube stub of the present invention will be held each pipeline that has connected tightly.Reach the purpose that in Aeronautics and Astronautics, air-conditioning, petroleum pipe line hydraulic pressure and air-channel system, each pipeline is connected and sealed.
Make low transformation temperature high strength Ti
50Ni
47Fe
1.5Mo
1.5Marmem pipe joint
(1) titanium (Ti) of purity 99.9%, the nickel (Ni) of purity 99.9%, the molybdenum (Mo) of purity 99.8% and the iron (Fe) of purity 99.7% are put into non-consumable arc furnace, be smelted into TiNiFeMo shape memory alloy ingot casting 2700 ℃ of temperature, Ti, Ni, Fe, Mo atomic percentage conc are 50%, 47%, 1.5% and 1.5%;
(2) in fusion process, control Ti by the add-on that changes the Fe element
50Ni
47Fe
1.5Mo
1.5The temperature of the transformation temperature of shape memory alloy and performance;
In fusion process, control Ti by the add-on that changes the Mo element
50Ni
47Fe
1.5Mo
1.5The intensity of shape memory alloy and performance;
(3) the forging hammer forging and pressing that are C11-150 with the above-mentioned ingot casting employing model that makes are rolled into sheet material.
Adopt MTS-880 type universal material experimental machine to carry out the test of mechanical property and shape memory effect to the sheet material that makes, tensile strain rate is 1.0mm/min; The sheet material that makes is adopted electrical resistance method test transformation temperature, and the sheet material sample is got size 15mm * 1mm * 1mm;
Low transformation temperature high strength Ti
50Ni
47Fe
1.5Mo
1.5The every The performance test results of shape memory alloy is: martensite begins transformation temperature and is-165 ℃, shape memory effect 5.2%, and room temperature tensile strength (σ b) is 815.1MPa, and room temperature yield strength (σ s) is 496MPa, and room temperature unit elongation (δ) is 15.2%;
(4) the above-mentioned ingot casting that makes is forged into bar, adopt machining process to be processed into, be provided with muscle 4 in the tube stub 1 as Fig. 4, tube stub part shown in Figure 5.
(5) when connecting each pipeline, will hang down transformation temperature high strength Ti earlier
50Ni
47Fe
1.5Mo
1.5Marmem pipe joint is put into liquid nitrogen and is stopped and carried out reaming in 3～5 minutes, takes out then, carries out pipeline at once and connects.Because shape memory alloy material has memory principle, when temperature is returned to room temperature naturally, tube stub of the present invention will be held each pipeline that has connected tightly.Reach the purpose that in Aeronautics and Astronautics, air-conditioning, petroleum pipe line hydraulic pressure and air-channel system, each pipeline is connected and sealed.
Claims (10)
1. low-phase point-variable high-strength TiNiFeMo marmem, it is characterized in that: component and content are that 0.1%～4% iron (Fe), 0.1%～5% molybdenum (Mo), 45%～50% titanium (Ti) and 45%～50% nickel (Ni) are formed, all percentage ratios are atomic percent, and above-mentioned each components contents sum is 100%.
2. low-phase point-variable high-strength TiNiFeMo marmem according to claim 1, it is characterized in that: martensite begins transformation temperature (Ms) and is extremely-200 ℃ of room temperatures, shape memory effect (SME) 4%～8%, room temperature tensile strength (6b) is 600MPa～850MPa, room temperature yield strength (6s) is 250MPa～550MPa, and room temperature unit elongation (δ) is 10.0%～30.0%.
3. low-phase point-variable high-strength TiNiFeMo marmem according to claim 1 is characterized in that: can be that component is Ti
50Ni
48Mo
1.5Fe
0.5Shape memory alloy.
4. low-phase point-variable high-strength TiNiFeMo marmem according to claim 1 is characterized in that: can be that component is Ti
50Ni
47Mo
1.5Fe
1.5Shape memory alloy.
5. according to claim 1,3 or 4 described optional low-phase point-variable high-strength TiNiFeMo marmems, it is characterized in that: adopt machining process to make the tube stub (1) that is used for connecting tube.
6. low-phase point-variable high-strength TiNiFeMo marmem tube stub according to claim 5 is characterized in that: smooth section (3) two ends of tube stub (1) are provided with contraction section (2), can be provided with muscle (4) in smooth section (3) or be shiny surface.
7. low-phase point-variable high-strength TiNiFeMo marmem tube stub according to claim 5 is characterized in that: tube stub (1) is a pipe shape, is provided with muscle (4) in the tube stub (1).
8. low-phase point-variable high-strength TiNiFeMo marmem tube stub according to claim 5 is characterized in that: tube stub carries out reaming in room temperature to-196 ℃ the low temperature environment and is connected with each pipe fitting.
9. low-phase point-variable high-strength TiNiFeMo marmem tube stub according to claim 5 is characterized in that: each pipe fitting is connected in the hydraulic pressure that tube stub can be used for Aeronautics and Astronautics, air-conditioning, petroleum pipe line and the air-channel system.
10. low-phase point-variable high-strength TiNiFeMo marmem tube stub according to claim 5 is characterized in that: the envrionment temperature-55 that tube stub is suitable for ℃～+ 500 ℃, operating pressure 10MPa～35MPa.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432256C (en) * | 2006-09-28 | 2008-11-12 | 北京航空航天大学 | Titanium-zirconium-iron shape memory alloy material |
| CN102913699A (en) * | 2012-09-27 | 2013-02-06 | 贵州航太精密制造有限公司 | Method for connecting hydraulic pipe with straight pipe joint |
| CN103157956A (en) * | 2011-12-16 | 2013-06-19 | 北京有色金属研究总院 | Processing method of nickel-titanium memorial alloy tube with thin diameter and thick wall |
| CN103433395A (en) * | 2013-09-03 | 2013-12-11 | 西安胜智航空科技有限公司 | Expanding device for shape memory alloy pipe joint |
| CN105666037A (en) * | 2014-11-17 | 2016-06-15 | 昌河飞机工业（集团）有限责任公司 | Assembly method of shape memory alloy pipe connector used for aircraft hydraulic system |
| CN106048372A (en) * | 2016-07-06 | 2016-10-26 | 燕山大学 | High-strength high-plasticity titanium-nickel-iron-carbon two-phase alloy and preparation method |
| CN108169276A (en) * | 2016-12-08 | 2018-06-15 | 北京有色金属研究总院 | The device and method for measuring expanding deformed marmem pipe joint phase transition temperature |
-
2004
- 2004-12-08 CN CN 200410096782 patent/CN1614055A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432256C (en) * | 2006-09-28 | 2008-11-12 | 北京航空航天大学 | Titanium-zirconium-iron shape memory alloy material |
| CN103157956A (en) * | 2011-12-16 | 2013-06-19 | 北京有色金属研究总院 | Processing method of nickel-titanium memorial alloy tube with thin diameter and thick wall |
| CN102913699A (en) * | 2012-09-27 | 2013-02-06 | 贵州航太精密制造有限公司 | Method for connecting hydraulic pipe with straight pipe joint |
| CN103433395A (en) * | 2013-09-03 | 2013-12-11 | 西安胜智航空科技有限公司 | Expanding device for shape memory alloy pipe joint |
| CN105666037A (en) * | 2014-11-17 | 2016-06-15 | 昌河飞机工业（集团）有限责任公司 | Assembly method of shape memory alloy pipe connector used for aircraft hydraulic system |
| CN106048372A (en) * | 2016-07-06 | 2016-10-26 | 燕山大学 | High-strength high-plasticity titanium-nickel-iron-carbon two-phase alloy and preparation method |
| CN108169276A (en) * | 2016-12-08 | 2018-06-15 | 北京有色金属研究总院 | The device and method for measuring expanding deformed marmem pipe joint phase transition temperature |
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