WO2004055222A1 - NbC添加Fe−Mn−Si系形状記憶合金の加工熱処理方法 - Google Patents
NbC添加Fe−Mn−Si系形状記憶合金の加工熱処理方法 Download PDFInfo
- Publication number
- WO2004055222A1 WO2004055222A1 PCT/JP2003/016189 JP0316189W WO2004055222A1 WO 2004055222 A1 WO2004055222 A1 WO 2004055222A1 JP 0316189 W JP0316189 W JP 0316189W WO 2004055222 A1 WO2004055222 A1 WO 2004055222A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- weight
- shape memory
- nbc
- treatment
- memory alloy
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C22/00—Alloys based on manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/006—Resulting in heat recoverable alloys with a memory effect
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2201/00—Treatment for obtaining particular effects
- C21D2201/01—Shape memory effect
Definitions
- the present invention relates to a method for thermomechanical processing of an NbC-added Fe_Mn_Si-based shape memory alloy. More specifically, the present invention provides a method of processing and heat-treating NbC-added Fe—Mn—Si-based shape memory alloy that can exhibit the shape memory characteristics of the above alloy and improve its performance without training. It is about. Background art
- training refers to a series of shape memory processing operations in which a process of applying 2-3% deformation at room temperature and then heating near 600 ° C above the reverse transformation point is repeated several times.
- the inventors of the present inventors have conducted intensive research to develop a simple operation, particularly a machining operation that does not require training.
- Patent Document 2
- Patent Document 3
- the present invention basically seeks to solve this problem.
- the present inventors have conducted intensive research to determine whether effective shape memory characteristics can be obtained and secured even under processing at a temperature as low as possible for a shape memory alloy having a specific composition, and this is possible. That is, shape memory characteristics even at room temperature Has been found to be sufficient to achieve the stated purpose.
- the basic operation of processing an Fe-Mn-Si-based shape memory alloy to which Nb and C are added at room temperature and then subjecting it to heat aging treatment to precipitate NbC carbide is applied. It has been found that the alloy has an unexpected effect that it can exhibit the shape memory characteristic 1 "of the alloy. In other words, it has succeeded in achieving the above-mentioned object. This was done based on success, and the solutions are shown in (1) to (7) below.
- Fe-Mn-Si-based shape memory alloy made by adding Nb and C is caulked at room temperature by 5 to 40% and then subjected to aging heat treatment to precipitate NbC carbide.
- the method for thermomechanical treatment of NbC-added Fe-Mn_Si-based shape memory alloys is described in detail below.
- Fe-Mn-Si-based shape memory alloys are composed of Mn: 15 to 40% by weight, Si: 3 to: L: 5% by weight, Nb: 0 .:! To 1. 5% by weight, C: 0.01 to 0.2% by weight, the balance consisting of Fe and unavoidable impurities, and the atomic ratio NbZC of Nb to C is 1 or more. 1) The method for thermomechanical treatment of NbC-added caro Fe-Mn-Si-based shape memory alloys described in item 1).
- Nb C-added Fe—Mn—Si-based shape memory alloy has the following alloy components: Mn: 15 to 40% by weight, Si: 3 to 15% by weight, Cr::! -20% by weight, Nb: 0.1-1.5% by weight, C: 0.01-0.2% by weight, the balance consisting of 6 and inevitable impurities, atomic ratio of Nb to C NbZC Wherein the NbC-added Fe—Mn_Si-based shape memory alloy according to the above item (1) is characterized in that the ratio is 1 or more.
- Nb Ci 3 ⁇ 4PF e -Mn-Si type shape memory alloy as alloy components, Mn: 15-40% by weight, Si: 3 to 15% by weight, Cr::!
- Nb according to any one of (2) to (4), wherein the atomic ratio of Nb and C is preferably set in a range of 1.0 to 1.2.
- C-added calo Fe-Mn-Si A method for thermomechanical processing of shape memory alloys. .
- Nb C-added Fe-Fe-Mn_Si-based shape memory alloy contains, as impurities, Cu: 3% by weight or less, Mo: 2% by weight or less, A1: 10% by weight or less, and Co: 30% by weight.
- thermomechanical treatment of Fe_Mn_Si-based shape memory alloys having a specific composition obtained by adding Nb and C conventional processing performed prior to aging is performed by training.
- the processing performed prior to the aging treatment was performed in a temperature range of 500 to 800 ° C.
- the processing performed prior to the aging treatment is specified. By setting the processing rate within this range, processing can be performed at room temperature regardless of high temperature, that is, the processing was successful.
- the technical significance is that the difference between the subjects is clear when compared with the premise of the prior art and the prior art, and it is clear that there is an extremely large difference.
- the present invention has succeeded in significantly improving shape memory properties for the first time by setting and combining a specific alloy composition, a workability at room temperature, and an aging condition within a certain range.
- the operation shows a shape recovery rate equivalent to that of the training-processed sample due to the extremely common processing heat treatment of room temperature processing and aging, and the shape recovery power is significantly larger than that of the training-processed sample.
- the present invention is expected to be further accelerated for practical use in various fields in the future.
- FIG. 1 is a view showing the relationship between the shape recovery rate and the initial deformation amount of a NbC-added Fe_Mn—Si-based shape memory alloy according to the present invention due to thermomechanical treatment.
- FIG. 2 is a diagram showing the relationship between shape recovery force and recovery strain of a NbC-added kneaded Fe-Mn-Si-based shape memory alloy according to the present invention due to thermomechanical treatment.
- the reason why the processing rate at room temperature is specified as 5 to 40% is that if it is less than 5%, it does not contribute to the improvement of shape memory characteristics effectively, and if it exceeds 40%, the sample becomes too hard and aging treatment This is because subsequent deformation becomes extremely difficult.
- the alloy component targeted by the method for thermomechanical treatment of the NbC-added kneaded Fe-Mn_Si-based shape memory alloy of the present invention is, as shown in the previous application, Mn: 15 to 40% by weight. . /. , S i: 3-15 weight. /.
- Nb 0.1 to 1.5% by weight
- C 0.01 to 0.2% by weight
- the balance is Fe and unavoidable impurities
- the atomic ratio Nb / C of Nb / C is 1 or more.
- the alloy components of the Nb-C-added Fe-Mn-Si-based shape memory alloy are as follows: Mn: 15 to 40% by weight, Si: 3 to: 15% by weight, Cr: 1 to 20% by weight. , Nb: 0.:! ⁇ 1.5 wt%, C: 0. 0:!
- the balance F e ⁇ Pi consists unavoidable impurities thereof, an alloy atomic ratio Nb / C of Nb to C is 1 or more, Further, Mn: 15 to 40% by weight, Si: 3 to 15% by weight, Cr ::! To 20% by weight, Ni: 0.1 to 20% by weight. / 0 , Nb: 0.1 to 1.5% by weight, C: 0.01 to 0.2% by weight, the balance consists of Fe and unavoidable impurities, and the atomic ratio of Nb / C Nb / C is 1
- the above alloys are also alloys targeted by the present invention.
- the atomic ratio NbZC of Nb to C in the alloy is preferably 1.0 to 1.2.
- an impurity 3% by weight or less of Cu and 2% by weight or less are contained as impurities. It is permissible to contain at least one or more of Mo, Al up to 10% by weight, Co up to 30% by weight, or N up to 5000 ppm.
- a Fe-28Mn_6Si—5Cr—0.53Nb-0.06C alloy (numerical value is% by weight) prepared by adding NbC of the present invention was prepared by melting. After rolling the obtained shape memory alloy at room temperature, it is subjected to aging treatment by heating for 1 minute to 2 hours in a temperature range of 400 to 1000 ° C to show how the shape memory property can be improved. It is shown below.
- FIG. 1 is a graph showing the difference in shape recovery ratio between the case where only aging is performed (rolling ratio 0%) and the case where 10%, 20% and 30% rolling is performed at room temperature.
- the aging process is All were performed at 800 ° C for 10 minutes.
- the results of an as-annealed sample and a sample trained five times are also shown for Fe-28Mn-6Si-5Cr alloy without NbC added.
- the horizontal axis is the amount of deformation (%) due to tensile deformation at room temperature
- the vertical axis is the shape recovery rate (%) when the sample is heated to 600 ° C. When heated to 400 ° C, almost the same shape recovery rate can be obtained.
- the test pieces used in this experiment were prepared with a thickness of 0.6 mm, a width of l to 4 mm, and a length (gauge length) of 15 mm.
- the 10% rolled sample has about the same or slightly inferior shape memory recovery as the alloy trained five times without NbC. .
- the amount of deformation necessary for practical use is about 4%, but even at this amount of deformation, a shape memory recovery rate of about 90% strongly suggests that it can be used as a practical alloy. I have. Considering that at least five trainings are required to obtain the same shape recovery rate with a normal Fe-Mn-Si based shape memory alloy without NbC addition, the effect is extremely excellent. I have.
- the shape recovery rate is almost the same or slightly better than that in the case of no processing (only aging). Furthermore, when the rolling reduction is 30%, the shape recovery rate is worse at a place where the initial strain is larger than when only aging is performed.
- the shape-restoring force one of the important shape-memory characteristics for practical use, is significantly higher for the samples that have been aged at 20% and 30% at room temperature after rolling at 30%. Has improved.
- Fig. 2 shows the degree of improvement of the shape recovery force in comparison with the case of only aging (rolling ratio 0%) and the case of aging treatment after rolling 10% at room temperature.
- the recovery force when the recovery strain on the horizontal axis is zero means the stress generated when both ends are fixed, heated to above the reverse transformation temperature after tensile deformation at room temperature, and then returned to room temperature again. Further, the recovery force when the recovery strain is 2%, for example, means the generated stress measured by fixing both ends after the recovery of the strain by 2%.
- the phase strain was tested at 4-6%. The test specimens used were the same as those used to obtain the results shown in Fig. 1.
- the recovery strain on the horizontal axis is, in a practical example, the diameter of the allowable clearance between the pipe and the fastener (shape memory alloy) when used for the fastener of the pipe. Corresponds to the value expressed as a percentage (%).
- This shape recovery force is remarkably improved at a high rolling reduction.
- the rolling reduction at room temperature is 20 to 30%, a recovery force of 310 MPa at a recovery strain of 0% and a recovery force of 20 OMPa can be obtained even at a recovery strain of 2%.
- the shape recovery force is significantly increased at high rolling reductions (20%, 30%) compared to the rolling reductions of 0% and 10%.
- FIG. 2 shows the shape recovery force of the solution-treated sample without NbC addition and the sample trained five times, but the recovery force is considerably higher than that according to the embodiment of the present invention.
- the present invention relates to a processing performed prior to the aging treatment on a Fe-Mn-Si-based shape memory alloy having a specific composition obtained by adding Nb and C.
- a processing performed prior to the aging treatment on a Fe-Mn-Si-based shape memory alloy having a specific composition obtained by adding Nb and C.
- the conventional technology which is the premise of the technology, is different from the conventional technology in that it requires training with complicated operations and high-temperature processing at 500 to 800 ° C in the prior art. Is clear and obvious. That is, the present invention has succeeded in significantly improving shape memory properties for the first time by setting a specific alloy composition, a workability at room temperature, and an aging condition within a certain range and combining them.
- the operation is performed at the same level of shape recovery rate as that of the sample that has been subjected to the training treatment by the extremely extensive processing heat treatment of room temperature processing and aging. And the shape resilience is significantly greater than that of the sample that has been subjected to the training process.
- Dai can be used and used as a fastening member for all purposes up to the fastening of oil pipes, and its economic effect is immense.
- the uses as the fastening members exemplified in the above are merely one end of the embodiment, and the present invention is not limited to such uses and fields, and the present invention will be applied to various fields in various fields in the future. It is expected to be put to practical use for various applications. Industrial applicability
- the present invention as a means for subjecting a Fe_Mn_Si type shape memory alloy having a specific composition obtained by adding Nb and C to a thermomechanical treatment to a thermomechanical treatment, it has been conventionally aged.
- the processing performed by training or, in the prior art, the processing performed prior to the aging process was performed in a temperature range of 500 to 800 ° C.
- the present inventors succeeded in making it possible to perform processing performed prior to aging processing within a specific processing rate, regardless of high temperature, that is, at room temperature.
- the technical significance of the present invention is clear when compared with the configurations of the prior art and the prior art on which it is based, and it is clear that there is an extremely large difference.
- the present invention has succeeded in significantly improving shape memory properties for the first time by setting a specific alloy composition, a workability at room temperature, and an aging condition within a certain range and combining them.
- the operation showed a shape recovery rate equivalent to that of the sample that had been subjected to the training treatment by the extremely common processing heat treatment of room temperature aging and aging, and the shape recovery force was significantly larger than that of the sample that had been subjected to the training treatment.
- it is expected that the present invention will be further accelerated toward practical use in various fields in the future.
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60322260T DE60322260D1 (de) | 2002-12-18 | 2003-12-17 | VERFAHREN ZUR THERMOMECHANISCHEN BEHANDLUNG FÜR EINE MIT NbC DOTIERTE Fe-Mn-Si-FORMGEDÄCHTNISLEGIERUNG |
EP03780855A EP1574587B1 (en) | 2002-12-18 | 2003-12-17 | METHOD OF THERMO-MECHANICAL-TREATMENT FOR Fe-Mn-Si SHAPE-MEMORY ALLOY DOPED WITH NbC |
US10/519,255 US20050236077A1 (en) | 2002-12-18 | 2003-12-17 | Method of thermo-mechanical-treatment for fe-mn-si shape-memory alloy doped with nbc |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002367062A JP3950963B2 (ja) | 2002-12-18 | 2002-12-18 | NbC添加Fe−Mn−Si系形状記憶合金の加工熱処理法 |
JP2002-367062 | 2002-12-18 |
Publications (1)
Publication Number | Publication Date |
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WO2004055222A1 true WO2004055222A1 (ja) | 2004-07-01 |
Family
ID=32588334
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/016189 WO2004055222A1 (ja) | 2002-12-18 | 2003-12-17 | NbC添加Fe−Mn−Si系形状記憶合金の加工熱処理方法 |
Country Status (7)
Country | Link |
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US (1) | US20050236077A1 (ja) |
EP (1) | EP1574587B1 (ja) |
JP (1) | JP3950963B2 (ja) |
KR (1) | KR20050083601A (ja) |
CN (1) | CN100342039C (ja) |
DE (1) | DE60322260D1 (ja) |
WO (1) | WO2004055222A1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8409372B1 (en) | 2010-09-02 | 2013-04-02 | The United States of America as Represented by the Administraton of National Aeronautics and Space Administration | Thermomechanical methodology for stabilizing shape memory alloy (SMA) response |
DE102013102353A1 (de) * | 2013-03-08 | 2014-09-11 | Thyssenkrupp Steel Europe Ag | Temperaturgesteuertes Umlenkmittel |
EP2976441B1 (de) | 2013-03-22 | 2019-02-27 | ThyssenKrupp Steel Europe AG | Eisenbasierte formgedächtnislegierung |
CN104328323A (zh) * | 2014-10-24 | 2015-02-04 | 王健英 | 一种锰铁合金材料及制备方法 |
WO2018047787A1 (ja) * | 2016-09-06 | 2018-03-15 | 国立大学法人東北大学 | Fe基形状記憶合金材及びその製造方法 |
CN107012411A (zh) * | 2017-03-08 | 2017-08-04 | 宁波高新区远创科技有限公司 | 一种土壤接地网用合金材料的制备方法 |
WO2018219463A1 (de) | 2017-06-01 | 2018-12-06 | Thyssenkrupp Steel Europe Ag | Fe-Mn-Si FORMGEDÄCHTNISLEGIERUNG |
DE102018119296A1 (de) * | 2018-08-08 | 2020-02-13 | Thyssenkrupp Ag | Inline Vorrecken von Formgedächtnislegierungen, insbesondere Flachstahl |
WO2020108754A1 (de) | 2018-11-29 | 2020-06-04 | Thyssenkrupp Steel Europe Ag | Flachprodukt aus einem eisenbasierten formgedächtniswerkstoff |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62112720A (ja) * | 1985-11-09 | 1987-05-23 | Nippon Steel Corp | Fe−Mn−Si系形状記憶合金の特性向上方法 |
US5032195A (en) * | 1989-03-02 | 1991-07-16 | Korea Institute Of Science And Technology | FE-base shape memory alloy |
US20010023723A1 (en) * | 2000-02-09 | 2001-09-27 | Takehiko Kikuchi | Shape memory alloy |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0382741A (ja) * | 1989-08-25 | 1991-04-08 | Nisshin Steel Co Ltd | 耐応力腐食割れ性に優れた形状記憶ステンレス鋼およびその形状記憶方法 |
FR2654748B1 (fr) * | 1989-11-22 | 1992-03-20 | Ugine Aciers | Alliage inoxydable a memoire de forme et procede d'elaboration d'un tel alliage. |
JP2003277827A (ja) * | 2002-03-20 | 2003-10-02 | National Institute For Materials Science | NbC添加Fe−Mn−Si系形状記憶合金の加工熱処理方法 |
-
2002
- 2002-12-18 JP JP2002367062A patent/JP3950963B2/ja not_active Expired - Lifetime
-
2003
- 2003-12-17 WO PCT/JP2003/016189 patent/WO2004055222A1/ja active IP Right Grant
- 2003-12-17 US US10/519,255 patent/US20050236077A1/en not_active Abandoned
- 2003-12-17 KR KR1020057001247A patent/KR20050083601A/ko not_active Application Discontinuation
- 2003-12-17 CN CNB2003801005661A patent/CN100342039C/zh not_active Expired - Fee Related
- 2003-12-17 DE DE60322260T patent/DE60322260D1/de not_active Expired - Lifetime
- 2003-12-17 EP EP03780855A patent/EP1574587B1/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62112720A (ja) * | 1985-11-09 | 1987-05-23 | Nippon Steel Corp | Fe−Mn−Si系形状記憶合金の特性向上方法 |
US5032195A (en) * | 1989-03-02 | 1991-07-16 | Korea Institute Of Science And Technology | FE-base shape memory alloy |
US20010023723A1 (en) * | 2000-02-09 | 2001-09-27 | Takehiko Kikuchi | Shape memory alloy |
Non-Patent Citations (3)
Title |
---|
BARUJ A. ET AL.: "Shape memory behaviour and recovery strength in training-less FE-MN-SI-based SMA containing NBC", THE JAPAN INSTITUTE OF METALS KOEN GAIYO, vol. 128, pages 347, XP002981522 * |
SAWAGUCHI ET AL.: "Shitsuon de incho henkeigo jiko netsushori shita Fe-28Mn-6Si-5Cr-0.5NbC gokin no keijo kioku tokusei", THE JAPAN INSTITUTE OF METALS KOEN GAIYO, vol. 133, 11 October 2003 (2003-10-11), pages 75, XP002981521 * |
See also references of EP1574587A4 * |
Also Published As
Publication number | Publication date |
---|---|
CN100342039C (zh) | 2007-10-10 |
KR20050083601A (ko) | 2005-08-26 |
EP1574587A4 (en) | 2006-02-01 |
JP3950963B2 (ja) | 2007-08-01 |
DE60322260D1 (de) | 2008-08-28 |
EP1574587B1 (en) | 2008-07-16 |
JP2004197161A (ja) | 2004-07-15 |
EP1574587A1 (en) | 2005-09-14 |
US20050236077A1 (en) | 2005-10-27 |
CN1692163A (zh) | 2005-11-02 |
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