CN107475646B - Method for manufacturing micro texture on surface of memory alloy - Google Patents
Method for manufacturing micro texture on surface of memory alloy Download PDFInfo
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- CN107475646B CN107475646B CN201710532468.9A CN201710532468A CN107475646B CN 107475646 B CN107475646 B CN 107475646B CN 201710532468 A CN201710532468 A CN 201710532468A CN 107475646 B CN107475646 B CN 107475646B
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 74
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 230000007704 transition Effects 0.000 claims abstract description 7
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 12
- 229910000734 martensite Inorganic materials 0.000 claims description 4
- 229910001566 austenite Inorganic materials 0.000 claims description 3
- 238000007723 die pressing method Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 abstract description 7
- 230000007246 mechanism Effects 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 5
- 230000003446 memory effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000030833 cell death Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001054 cortical effect Effects 0.000 description 1
- 230000003013 cytotoxicity Effects 0.000 description 1
- 231100000135 cytotoxicity Toxicity 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005459 micromachining Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
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- 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
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- Chemical & Material Sciences (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Image Generation (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The application discloses a manufacturing method of a memory alloy surface microtexture, which comprises the following steps: performing mould pressing forming on the surface of the memory alloy by using a microtexture mould, and forming a first micro-bulge and a first micro-pit on the surface of the memory alloy; removing the first micro-protrusions and reserving the first micro-pits to enable the molding surface of the memory alloy to form a plane and form a memory alloy flat plate; the memory alloy flat plate is subjected to heat treatment, the temperature of the heat treatment is higher than the phase transition temperature of the memory alloy flat plate, the memory alloy surface micro-texture is obtained, a micro-texture mold can be manufactured according to a specific micro-texture mechanism, and the problem that the memory alloy surface cannot be subjected to pit, micropore and bulge micro-texture treatment in the prior art can be solved.
Description
Technical Field
The disclosure relates to the field of memory alloy processing, in particular to the field of memory alloy micro-texture, and particularly relates to a manufacturing method of a memory alloy surface micro-texture.
Background
The shape memory alloy is a special functional material and has a shape memory effect, namely, the shape of the alloy is deformed under the action of external load, and once the alloy is heated to a specific transition temperature, the deformed alloy can be magically restored to the original shape. The unique shape memory effect that such other metals or alloys do not possess has led to the wide use of shape memory alloys in aerospace, medical devices, transportation, energy development and mechanical industries.
In the medical field, the memory alloy is commonly used for surgical implants such as human joints, and compared with stainless steel and titanium alloy, the memory alloy has mechanical properties closer to that of cortical bone and has higher wear resistance. However, the low corrosiveness of this material has some negative effects, and the corrosive products generated on the surface of the alloy lead to increased cytotoxicity, thus causing abnormal cell death. However, the uniformity of microstructure and surface morphology of these materials can alter the corrosion and wear resistance of the memory alloy.
Theoretical research and engineering practice show that the surface texturing of the material can obviously improve the friction performance of a contact surface, increase the roughness of the contact surface and enhance the hydrophobicity of the surface, thereby greatly reducing the adhesive force and the friction force of the surface and improving the wear resistance of the material. Related researches find that the surface texturing of the mechanical seal can effectively reduce the friction torque; after the surface texturing treatment is carried out on the sliding bearing, the piston and the cylinder system, the antifriction performance and the bearing capacity are obviously improved. At present, the existing surface texturing processing technologies include micro electrochemical machining, laser machining, mechanical micromachining, LIGA and the like, but these methods are limited by the complexity and mechanical properties of the memory alloy material, and how to perform surface texturing processing on the memory alloy with pits, micropores, protrusions or irregular structures is a difficult point.
Disclosure of Invention
In view of the above-mentioned defects or shortcomings in the prior art, it is desirable to provide a method for manufacturing a memory alloy surface microtexture capable of processing pits, micro-holes and protrusions.
In a first aspect, the method for manufacturing the memory alloy surface microtexture of the present invention includes:
performing mould pressing forming on the surface of the memory alloy by using a microtexture mould, and forming a first micro-bulge and a first micro-pit on the surface of the memory alloy;
removing the first micro-protrusions and reserving the first micro-pits to enable the molding surface of the memory alloy to form a plane and form a memory alloy flat plate;
and (3) carrying out heat treatment on the memory alloy flat plate, wherein the temperature of the heat treatment is higher than the phase transition temperature of the memory alloy flat plate, so as to obtain the memory alloy surface microtexture.
According to the technical scheme provided by the embodiment of the application, the micro-texture mold is used for mold pressing of the surface of the memory alloy, then the first micro-protrusions generated by mold pressing are removed, the first micro-pits are recovered to the parent phase to form the micro-texture after heat treatment, the micro-texture mold can be manufactured according to a specific micro-texture mechanism, and the problem that micro-texture processing of the pits, the micro-holes and the protrusions cannot be performed on the surface of the memory alloy in the prior art can be solved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1-5 are schematic process diagrams of the method for manufacturing the micro-texture on the surface of the memory alloy according to the embodiment of the invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1-5, the method for manufacturing the memory alloy surface microtexture of the present invention includes:
performing die pressing forming on the surface of the memory alloy 20 by using the microtexture die 10, and forming a first micro-protrusion 21 and a first micro-pit 22 on the surface of the memory alloy 20;
removing the first micro-protrusions 21 and reserving the first micro-pits 22, so that the molding surface of the memory alloy 20 forms a plane to form a memory alloy flat plate;
and (3) carrying out heat treatment on the memory alloy flat plate, wherein the temperature of the heat treatment is higher than the phase transition temperature of the memory alloy flat plate, and obtaining the micro texture 30 on the surface of the memory alloy 20.
Furthermore, a second micro-pit 11 is arranged at a position of the micro-texture mold 10 corresponding to the first micro-bump 21, and a second micro-bump 12 is arranged at a position of the micro-texture mold 10 corresponding to the first micro-pit 22.
Further, after the flat plate of the memory alloy 20 is heat-treated, the first micro-pits 22 are transformed into third micro-bumps 23.
Further, the material structure of the third microprotrusions 23 is austenite.
Further, prior to heat treatment, the material structure of memory alloy 20 is martensitic.
In the embodiment of the invention, firstly, a mold is made according to the microtexture, specifically, the surface of the mold is processed and made to be consistent with the surface structure of the microtexture, the mold can be customized according to the actual requirement, the microtexture manufacturing of the shapes of the bulge, the pit, the micropore and the like is carried out, referring to the figure 1-3, the mold is used for carrying out the mold pressing forming on the surface of the memory alloy, the first micro pit of the memory alloy is manufactured through the second micro pit of the mold, the first micro bulge of the memory alloy is manufactured through the second micro pit of the mold, referring to the figure 4, after the mold pressing forming, the first micro bulge is removed by using the numerical control milling processing method, the first micro pit is reserved, the memory alloy flat plate is obtained, wherein the thickness of the memory alloy flat plate is smaller than the thickness of the initial memory alloy, referring to the figure 5, the surface microt, the surface of the first micro-pit generates certain stress after mould pressing, at the moment, the material structure of the memory alloy is martensite, and after the stress is removed, the memory alloy can not generate memory recovery; when the memory alloy is subjected to heat treatment, when the temperature reaches the phase transition temperature of the memory alloy, the martensite structure of the memory alloy material is subjected to phase transition due to the memory effect on the original shape to form a parent-phase austenite structure, the shape of the first micro-pit is subjected to memory recovery to form a third micro-protrusion, so that the memory alloy with the micro-protrusion structure on the surface is obtained, the micro-texture on the surface of the memory alloy is prepared, the memory effect derived from the memory alloy is endowed to the micro-texture on the surface of the memory alloy, namely, a specific fine structure is prepared on the surface of the memory alloy by using the characteristics of the material, and a method for applying the memory alloy to the material is developed; other memory alloy processing methods only consider the influence of the memory alloy performance on a certain processing method and do not utilize the performance to carry out self-forming. In the embodiment of the invention, the manufacturing method of the memory alloy surface microtexture skillfully combines the die forming technology and the memory effect, and the microtexture with a certain shape profile is formed on the surface of the memory alloy, so that the friction characteristic of the surface of the memory alloy is improved.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (3)
1. A method for manufacturing a memory alloy surface microtexture is characterized by comprising the following steps:
performing die pressing forming on the surface of a memory alloy by using a micro-texture die, forming a first micro-protrusion and a first micro-pit on the surface of the memory alloy, arranging a second micro-pit at a position of the micro-texture die corresponding to the first micro-protrusion, and arranging a second micro-protrusion at a position of the micro-texture die corresponding to the first micro-pit;
removing the first micro-protrusions and reserving the first micro-pits to enable the molding surface of the memory alloy to form a plane and form a memory alloy flat plate;
and carrying out heat treatment on the memory alloy flat plate, wherein the heat treatment temperature is higher than the phase transition temperature of the memory alloy flat plate, and the first micro-pits are transformed into third micro-bulges to obtain the memory alloy surface micro-texture.
2. The method of claim 1, wherein the material structure of the third micro-protrusions is austenite.
3. The method of claim 1, wherein the material structure of the memory alloy is martensitic before the heat treatment.
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| CN107475646B true CN107475646B (en) | 2020-03-03 |
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| CN110293166B (en) * | 2019-07-03 | 2021-09-17 | 太原科技大学 | Method and device for preparing texture of plunger pump valve plate |
| CN114473390B (en) * | 2022-03-04 | 2023-04-25 | 长春理工大学 | Preparation method of self-heat-absorbing and re-formable ice-extending/deicing microarray structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102680502A (en) * | 2012-04-27 | 2012-09-19 | 中国航空工业集团公司北京航空材料研究院 | Method for measuring metal bar textures |
| CN103151453A (en) * | 2013-03-12 | 2013-06-12 | 南京航空航天大学 | Preparation method of IPMC (ion polymer metal composite) electric actuating material with micro nano surface texture |
| CN105032964A (en) * | 2015-09-19 | 2015-11-11 | 太原理工大学 | Continuous extrusion machining device used for magnesium alloy sheet strip with weak basal texture and extrusion machining method |
| CN105149894A (en) * | 2015-10-10 | 2015-12-16 | 湘潭大学 | Method for manufacturing microstructure carbide blade |
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| JP3552587B2 (en) * | 1999-04-28 | 2004-08-11 | 株式会社日立製作所 | Composite materials and semiconductor devices |
| JP2001342527A (en) * | 2000-03-27 | 2001-12-14 | Sumitomo Special Metals Co Ltd | Titanium - nickel intermetallic alloy sheet and production procss for the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102680502A (en) * | 2012-04-27 | 2012-09-19 | 中国航空工业集团公司北京航空材料研究院 | Method for measuring metal bar textures |
| CN103151453A (en) * | 2013-03-12 | 2013-06-12 | 南京航空航天大学 | Preparation method of IPMC (ion polymer metal composite) electric actuating material with micro nano surface texture |
| CN105032964A (en) * | 2015-09-19 | 2015-11-11 | 太原理工大学 | Continuous extrusion machining device used for magnesium alloy sheet strip with weak basal texture and extrusion machining method |
| CN105149894A (en) * | 2015-10-10 | 2015-12-16 | 湘潭大学 | Method for manufacturing microstructure carbide blade |
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