CN102409197A - Shape memory alloy sealing gasket and production technology thereof - Google Patents
Shape memory alloy sealing gasket and production technology thereof Download PDFInfo
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- CN102409197A CN102409197A CN2011103577040A CN201110357704A CN102409197A CN 102409197 A CN102409197 A CN 102409197A CN 2011103577040 A CN2011103577040 A CN 2011103577040A CN 201110357704 A CN201110357704 A CN 201110357704A CN 102409197 A CN102409197 A CN 102409197A
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 238000007789 sealing Methods 0.000 title abstract description 15
- 238000005516 engineering process Methods 0.000 title description 2
- 239000000463 material Substances 0.000 claims abstract description 49
- 238000007906 compression Methods 0.000 claims abstract description 16
- 230000006835 compression Effects 0.000 claims abstract description 13
- 230000009466 transformation Effects 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 7
- 238000012549 training Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 229910001566 austenite Inorganic materials 0.000 claims description 5
- 229910000734 martensite Inorganic materials 0.000 claims description 5
- 241001062472 Stokellia anisodon Species 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000000956 alloy Substances 0.000 abstract description 16
- 229910001000 nickel titanium Inorganic materials 0.000 abstract description 16
- 229910045601 alloy Inorganic materials 0.000 abstract description 15
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000006399 behavior Effects 0.000 description 7
- 230000032683 aging Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 230000035882 stress Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 3
- 241000863032 Trieres Species 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000012781 shape memory material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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Abstract
The invention discloses a shape memory alloy sealing gasket. The sealing gasket is characterized in that the material comprises the following components in parts by weight: 53.25-58.42 parts of Ni, 41.63-45.82 parts of Ti, 0.1-0.2 part of Al, 0.01-0.03 part of Cu and 0.015-0.12 part of V. The shape memory alloy sealing gasket utilizes the superelasticity and shake-suction performance of the NiTi alloy and has the advantages of good compression elasticity, corrosion resistance, fatigue resistance, high pressure resistance and good safe reliability.
Description
Technical field
The present invention relates to shape memory alloy gasket seal and production technique thereof.
Background technology
Gasket seal is the key element that keeps sealing effectiveness during bolt flange connects, and the application in process industrial devices such as pressurized vessel, processing unit, power machine and connecting tube is very extensive, and its inefficacy might bringing on a disaster property consequence.The polymeric seal sheet uses the back to be prone to the aging stress relaxation that causes for a long time; Common stainless steel or aluminum gasket seal are because Young's modulus is big; Sealing effectiveness is affected again; And bolt also showing creep relaxation under long-term stretched state, and the plain metal pad can't guarantee reliable and effective seal snap-in force in the residual set amount that the lax back of bolt produces.In recent years; Both at home and abroad the scientific worker has carried out a large amount of research on the gasket seal material is selected, and the measure that has proposed to utilize the SME of shape memory alloy to improve sealing effectiveness, however the complex structure of these measures; Processing difficulties also has big gap from production application.
Shape memory alloy brings out transformation behavior receiving more than the austenite transformation temperature can produce under stress or the effects of strain, and stress (or strain) brings out the stress-strain curve that martensitic transformation has changed material, shows superelastic properties.At present shape memory alloy being introduced the work that the gasket seal material studies does not carry out as yet at home.
People such as the Tatsuoka of Tokyo Electric Power have studied the nearly performance that waits the gasket seal of atomic ratio NiTi shape memory alloy, and in AAE's pressurized vessel in 2006 and pipeline meeting, announce.Result of study shows that the NiTi material is under the stress under compression effect, and stress-strain curve shows obvious phase transformation platform; Compressive modulus of elasticity is littler than aluminum plain cushion; The linear expansivity of NiTi alloy is littler than 304 stainless steels; The sealing property of NiTi gasket seal is more superior than aluminum plain cushion.This result of study explanation NiTi alloy satisfies in bolt flange connects the request for utilization as gasket seal; Yet more researchist; Like people such as Xu Zuyao, yellow-study literary composition, Qian Shiqiang, Gall Ken, Liu Yong, Raghavendra R Adharapurapu; The compression behavior of finding the NiTi alloy perhaps is not the result of study as people such as Tatsuoka, and stress-strain curve does not show tangible phase transformation platform in the NiTi alloy compression process.Simultaneously, the NiTi alloy is as a kind of shape-memory material, and its performance receives the influence of thermal-mechanical treatment bigger, and people such as Tatsuoka do not propose to optimize or further investigation to the gasket seal ME of NiTi shape memory alloy material yet.
The develop rapidly of modern industry is more and more stricter to the requirement of gasket seal; Reducing leakage rate, prolonging pad work-ing life is environment protection, save energy, the very urgent requirement of safety in production, and selecting sealing material to improve the sealing property that bolt flange connects has become a kind of trend.
Summary of the invention
The purpose of this invention is to provide a kind of shape memory alloy gasket seal and production technique thereof; The sealing snap-in force that this kind pad utilizes the superelastic properties of shape memory alloy to provide bolt flange to connect has that compressive modulus of elasticity is little, absorbing, corrosion-resistant, antifatigue, bears pressure height, advantage that safe reliability is good.
The present invention adopts following technical scheme:
A kind of shape memory alloy gasket seal is characterized in that the ratio of weight and number component composition of its material comprises: Ni:53.25-58.42, Ti:41.63-45.82, Al:0.1-0.2, Cu:0.01-0.03, V:0.015-0.12.
The martensite of the material of said shape memory alloy gasket seal begins transformation temperature (M
s) be-20～+ 40 ℃, austenite phase transformation end temp (A
f) be 0～+ 50 ℃.
The rate of compression of the material of said shape memory alloy gasket seal is 2.7～5%, and rebound degree is 85～96%.
The compressive modulus of elasticity of the material of said shape memory alloy gasket seal is 2.5～22GPa.
A kind of production technique of shape memory alloy gasket seal may further comprise the steps:
1) prepare the raw material of shape memory alloy, its ratio of weight and number component is formed and is comprised: Ni:53.25-58.42, and Ti:41.63-45.82, Al:0.1-0.2, Cu:0.01-0.03, V:0.015-0.12, and smelt and be rolled into sheet material, panel material thickness is 2-4mm;
2) the light sheet line is cut to the gasket seal dimensional requirement, and with the two-sided plain grinding of gasket seal to 1.4-3.5mm;
3) gasket seal is carried out solution treatment: be incubated 30-60min down at 750～950 ℃;
4) adopt the thermal-mechanical treatment mode that gasket seal is carried out the super-elasticity training, wherein processing mode comprises predeformation and inefficacy;
5) clean is carried out on the gasket seal surface, come into operation then.
The martensite of the material of the shape memory alloy gasket seal that is finally obtained begins transformation temperature (M
s) be-20～+ 40 ℃, austenite phase transformation end temp (A
f) be 0～+ 50 ℃.
The rate of compression of the material of the shape memory alloy gasket seal that is finally obtained is 2.7～5%, and rebound degree is 85～96%.
The compressive modulus of elasticity of the material of the shape memory alloy gasket seal that is finally obtained is 2.5～22GPa.
Positively effect of the present invention is following:
Shape memory alloy gasket seal proposed by the invention is compared with existing gasket seal has following characteristics: there is the transformation behavior of stress or strain-induced in the used shape memory alloy of gasket seal in loading compression and unloading springback process; Transformation behavior makes this kind metallic packing littler in the compression process Elastic Modulus than plain metal gasket seal, and resilience is bigger in uninstall process; Behind the bolt life-time service under the relaxation cases, the shape memory alloy gasket seal can be guaranteed the sealing snap-in force of flange face through transformation behavior in bolt flange connects.Compare with other nonmetal gasket seal or matrix material pad, the shape memory alloy gasket seal also has the pressure of bearing height, anti-aging and corrosion resistant characteristic.Because shape memory alloy has good damping characteristic simultaneously, so this kind gasket seal can play good shock attenuation result as the flange face fitting body, and this is for prolonging bolt life, guaranteeing that the long term seal effect all has active effect.
Description of drawings
Fig. 1 is the DSC graphic representation of NiTi alloy sample temperature-fall period.
Fig. 2 is the DSC graphic representation of NiTi alloy sample temperature-rise period.
Fig. 3 is embodiment 1 compression-rebound curve figure.
Fig. 4 is embodiment 2 compression-rebound curve figure.
Fig. 5 is embodiment 3 compression-rebound curve figure.
Fig. 6 is embodiment 4 compression-rebound curve figure.
Fig. 7 is embodiment 5 compression-rebound curve figure.
Embodiment
Press ASME B16.47 standard size system and confirm the inside and outside footpath of pad size,
Embodiment 1
Material weight portion rate component of the present invention consists of: Ni-58.25, Ti-41.45, Al-0.168, Cu-0.0256, V-0.106.
Production technique of the present invention is following:
(1) prepare to be rolled into sheet material, the as above requirement of sheet material composition, panel material thickness is about 2mm;
(2) press ASME B16.47 standard Intermediate gasket dimensional requirement, the sheet material line is cut into internal diameter 48mm, external diameter 52.12mm plain cushion, and two-sided plain grinding is to 1.45mm;
(3) pad is carried out solution treatment: be incubated 30min down at 850 ℃;
(4) pad is carried out the super-elasticity training, wherein aging temp is 250 ℃, duration 60min;
(5) gasket surface is carried out clean, come into operation then.
Embodiment 2
Material weight portion rate component of the present invention consists of: Ni-58.25, Ti-41.45, Al-0.168, Cu-0.0256, V-0.106.
Production technique of the present invention is following:
(1) prepare to be rolled into sheet material, the as above requirement of sheet material composition, panel material thickness is about 2mm;
(2) press ASME B16.47 standard Intermediate gasket dimensional requirement, the sheet material line is cut into internal diameter 48mm, external diameter 52.12mm plain cushion, and two-sided plain grinding is to 1.45mm;
(3) pad is carried out solution treatment: be incubated 30min down at 850 ℃;
(4) pad is carried out the super-elasticity training, wherein the predeformation rate 0.2%, 250 ℃ of aging temps, duration 180min;
(5) gasket surface is carried out clean, come into operation then.
Embodiment 3
Material weight portion rate component of the present invention consists of: Ni-58.25, Ti-41.45, Al-0.168, Cu-0.0256, V-0.106.
Production technique of the present invention is following:
(1) prepare to be rolled into sheet material, the as above requirement of sheet material composition, panel material thickness is about 2mm;
(2) press ASME B16.47 standard Intermediate gasket dimensional requirement, the sheet material line is cut into internal diameter 48mm, external diameter 52.12mm plain cushion, and two-sided plain grinding is to 1.45mm;
(3) pad is carried out solution treatment: be incubated 30min down at 850 ℃;
(4) pad is carried out the super-elasticity training, wherein the predeformation rate 0.2%, 400 ℃ of aging temps, duration 60min;
(5) gasket surface is carried out clean, come into operation then.
Embodiment 4
Material weight portion rate component of the present invention consists of: Ni-58.25, Ti-41.45, Al-0.168, Cu-0.0256, V-0.106.
Production technique of the present invention is following:
(1) prepare to be rolled into sheet material, the as above requirement of sheet material composition, panel material thickness is about 2mm;
(2) press ASME B16.47 standard Intermediate gasket dimensional requirement, the sheet material line is cut into internal diameter 48mm, external diameter 52.12mm plain cushion, and two-sided plain grinding is to 1.45mm;
(3) pad is carried out solution treatment: be incubated 30min down at 850 ℃;
(4) pad is carried out the super-elasticity training, wherein the predeformation rate 0.7%, 250 ℃ of aging temps, duration 120min;
(5) gasket surface is carried out clean, come into operation then.
Embodiment 5
Material weight portion rate component of the present invention consists of: Ni-58.25, Ti-41.45, Al-0.168, Cu-0.0256, V-0.106.
Production technique of the present invention is following:
(1) prepare to be rolled into sheet material, the as above requirement of sheet material composition, panel material thickness is about 2mm;
(2) press ASME B16.47 standard Intermediate gasket dimensional requirement, the sheet material line is cut into internal diameter 48mm, external diameter 52.12mm plain cushion, and two-sided plain grinding is to 1.45mm;
(3) pad is carried out solution treatment: be incubated 30min down at 850 ℃;
(4) pad is carried out the super-elasticity training, wherein the predeformation rate 0.7%, 550 ℃ of aging temps, duration 60min;
(5) gasket surface is carried out clean, come into operation then.
The phase transformation temperature points of pad sample adopts dsc to measure, and transformation temperature is recorded by DSC graphic representation shown in Figure 1.As shown in table 1, listed the transformation temperature of embodiment 1～5:
Table 1NiTi alloy sealing flat gasket pad sample transformation temperature measuring result
For compression and the rebound performance of examining the shape memory alloy gasket seal, adopt the MTS-880 universal hydraulic testing machine to related process down the sample of preparation compress-mensuration of rebound performance.
Test operation and experimental data processing are carried out according to ASTM F36-99.
Concrete testing sequence is following:
(1) sample among above-mentioned 5 embodiment is placed on respectively on the trier self-coordinating levelling bench, and mixes up placement location according to the trier pressure head;
(2) sample is carried out preload, magnitude of load is 5MPa;
(3) after preload is accomplished, be loaded on 300MPa, after 30 seconds, be offloaded to 0 at the same rate again at the pressure that keeps 300MPa with the loading velocity of 0.5MPa/s;
(4) stress-displacement curve that obtains according to test, and calculate Young's modulus, rate of compression and the rebound degree of pad sample.
Test-results is as shown in table 2.
Table 2NiTi alloy sealing flat gasket pad sample compression-rebound performance test result
The test-results data obtain stress-strain curve shown in Fig. 3 to 7, from curve, can find out that tangible phase transformation platform does not appear in NiTi alloy gasket seal under compressive load; Curve integral body is slope and constantly raises; Have transformation behavior in the compression process, transformation behavior has improved the rate of compression and the rebound degree of gasket seal.
With respect to aluminium plain cushion, metal wound gasket and stainless steel octangonal ring, NiTi alloy gasket, rebound performance is better, and has better corrosion resistance nature; Compare with stainless steel metal or composition metal gasket, the Young's modulus of NiTi alloy gasket is little, and rate of compression is big.NiTi alloy gasket seal is applied widely; In process industrial devices such as pressurized vessel, processing unit, power machine and connecting tube, can improve the sealing property that bolt flange is connected, this is significant for the security and the safety that guarantee entire system.
Stress-the displacement curve that obtains according to test, and calculate Young's modulus, rate of compression and the rebound degree of current material pad sample, test-results is as shown in table 3.
The existing alloy sealing of table 3 flat gasket pad sample compression-rebound performance test result
Claims (8)
1. a shape memory alloy gasket seal is characterized in that the ratio of weight and number component composition of its material comprises: Ni:53.25-58.42, Ti:41.63-45.82, Al:0.1-0.2, Cu:0.01-0.03, V:0.015-0.12.
2. shape memory alloy gasket seal according to claim 1 is characterized in that: the martensite of the material of said shape memory alloy gasket seal begins transformation temperature (M
s) be-20～+ 40 ℃, austenite phase transformation end temp (A
f) be 0～+ 50 ℃.
3. shape memory alloy gasket seal according to claim 1 is characterized in that: the rate of compression of the material of said shape memory alloy gasket seal is 2.7～5%, and rebound degree is 85～96%.
4. shape memory alloy gasket seal according to claim 1 is characterized in that: the compressive modulus of elasticity of the material of said shape memory alloy gasket seal is 2.5～22GPa.
5. the production technique of a shape memory alloy gasket seal is characterized in that:
1) prepare the raw material of shape memory alloy, its ratio of weight and number component is formed and is comprised: Ni:53.25-58.42, and Ti:41.63-45.82, Al:0.1-0.2, Cu:0.01-0.03, V:0.015-0.12, and smelt and be rolled into sheet material, panel material thickness is 2-4mm;
2) the light sheet line is cut to the gasket seal dimensional requirement, and with the two-sided plain grinding of gasket seal to 1.4-3.5mm;
3) gasket seal is carried out solution treatment: be incubated 30-60min down at 750～950 ℃;
4) adopt the thermal-mechanical treatment mode that gasket seal is carried out the super-elasticity training, wherein processing mode comprises predeformation and inefficacy;
5) clean is carried out on the gasket seal surface, come into operation then.
6. the production technique of shape memory alloy gasket seal according to claim 5 is characterized in that: the martensite of the material of the shape memory alloy gasket seal that is finally obtained begins transformation temperature (M
s) be-20～+ 40 ℃, austenite phase transformation end temp (A
f) be 0～+ 50 ℃.
7. the production technique of shape memory alloy gasket seal according to claim 5 is characterized in that: the rate of compression of the material of the shape memory alloy gasket seal that is finally obtained is 2.7～5%, and rebound degree is 85～96%.
8. the production technique of shape memory alloy gasket seal according to claim 5 is characterized in that: the compressive modulus of elasticity of the material of the shape memory alloy gasket seal that is finally obtained is 2.5～22GPa.
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| CN201110357704.0A CN102409197B (en) | 2011-11-11 | 2011-11-11 | Shape memory alloy sealing gasket and production technique thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216623A (en) * | 2013-04-11 | 2013-07-24 | 北京航空航天大学 | Method for improving graphite seal life based on SMA (Shape Memory Alloy) constant force spring |
| CN104549626A (en) * | 2013-10-11 | 2015-04-29 | 山特维克知识产权股份有限公司 | Sealing ring for gyratory crusher |
| CN104896231A (en) * | 2015-02-11 | 2015-09-09 | 南京工业大学 | A porous TiNi shape memory alloy composite pad and a production process thereof |
| CN106224547A (en) * | 2016-07-15 | 2016-12-14 | 上海阿莱德实业有限公司 | Sealing gasket is filled in a kind of phase transformation |
| CN106402133A (en) * | 2016-11-10 | 2017-02-15 | 无锡市明盛强力风机有限公司 | Automatic load averaging method for cylinder head bolts |
| CN107523719A (en) * | 2017-09-22 | 2017-12-29 | 北京航空航天大学 | A kind of new high rigidity NiTi based alloy |
| CN109822298A (en) * | 2019-01-31 | 2019-05-31 | 中国航发动力股份有限公司 | A kind of split washer and its processing method |
| CN109957745A (en) * | 2019-03-27 | 2019-07-02 | 中国航发北京航空材料研究院 | A kind of heat treatment method optimizing NiTi-Al base powder alloy precipitated phase |
| CN110469614A (en) * | 2019-09-10 | 2019-11-19 | 南京航空航天大学 | A kind of shock loading slowing device and method based on marmem |
| CN112322954A (en) * | 2020-11-03 | 2021-02-05 | 西北工业大学 | Airplane wallboard assembly clearance compensation shape memory alloy gasket and preparation and assembly methods thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216623B (en) * | 2013-04-11 | 2015-05-13 | 北京航空航天大学 | Method for improving graphite seal life based on SMA (Shape Memory Alloy) constant force spring |
| CN103216623A (en) * | 2013-04-11 | 2013-07-24 | 北京航空航天大学 | Method for improving graphite seal life based on SMA (Shape Memory Alloy) constant force spring |
| CN104549626A (en) * | 2013-10-11 | 2015-04-29 | 山特维克知识产权股份有限公司 | Sealing ring for gyratory crusher |
| CN104896231B (en) * | 2015-02-11 | 2018-02-09 | 南京工业大学 | A kind of porous TiNi marmems Composition spacer and production technology |
| CN104896231A (en) * | 2015-02-11 | 2015-09-09 | 南京工业大学 | A porous TiNi shape memory alloy composite pad and a production process thereof |
| CN106224547A (en) * | 2016-07-15 | 2016-12-14 | 上海阿莱德实业有限公司 | Sealing gasket is filled in a kind of phase transformation |
| CN106402133A (en) * | 2016-11-10 | 2017-02-15 | 无锡市明盛强力风机有限公司 | Automatic load averaging method for cylinder head bolts |
| CN107523719A (en) * | 2017-09-22 | 2017-12-29 | 北京航空航天大学 | A kind of new high rigidity NiTi based alloy |
| CN107523719B (en) * | 2017-09-22 | 2019-09-20 | 北京航空航天大学 | A kind of novel high rigidity NiTi based alloy |
| CN109822298A (en) * | 2019-01-31 | 2019-05-31 | 中国航发动力股份有限公司 | A kind of split washer and its processing method |
| CN109957745A (en) * | 2019-03-27 | 2019-07-02 | 中国航发北京航空材料研究院 | A kind of heat treatment method optimizing NiTi-Al base powder alloy precipitated phase |
| CN109957745B (en) * | 2019-03-27 | 2020-11-13 | 中国航发北京航空材料研究院 | Heat treatment method for optimizing NiTi-Al-based powder alloy precipitated phase |
| CN110469614A (en) * | 2019-09-10 | 2019-11-19 | 南京航空航天大学 | A kind of shock loading slowing device and method based on marmem |
| CN110469614B (en) * | 2019-09-10 | 2020-09-25 | 南京航空航天大学 | Impact load relieving device and method based on shape memory alloy |
| CN112322954A (en) * | 2020-11-03 | 2021-02-05 | 西北工业大学 | Airplane wallboard assembly clearance compensation shape memory alloy gasket and preparation and assembly methods thereof |
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| CN102409197B (en) | 2016-03-30 |
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