CN115287560A - Titanium alloy material gradient micro-nano structure utilizing laser impact and preparation method thereof - Google Patents
Titanium alloy material gradient micro-nano structure utilizing laser impact and preparation method thereof Download PDFInfo
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- CN115287560A CN115287560A CN202210875657.7A CN202210875657A CN115287560A CN 115287560 A CN115287560 A CN 115287560A CN 202210875657 A CN202210875657 A CN 202210875657A CN 115287560 A CN115287560 A CN 115287560A
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 66
- 239000000956 alloy Substances 0.000 title claims abstract description 22
- 239000002086 nanomaterial Substances 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 230000032683 aging Effects 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 230000035939 shock Effects 0.000 claims abstract description 9
- 239000000243 solution Substances 0.000 claims abstract description 9
- 238000002635 electroconvulsive therapy Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000006104 solid solution Substances 0.000 claims abstract description 6
- 238000004381 surface treatment Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 abstract description 19
- 230000035882 stress Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract description 2
- 238000005728 strengthening Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 6
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000000717 retained effect Effects 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
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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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
- C22F3/00—Changing the physical structure of non-ferrous metals or alloys by special physical methods, e.g. treatment with neutrons
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- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
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- Nanotechnology (AREA)
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Abstract
The invention relates to a titanium alloy material gradient micro-nano structure by utilizing laser impact and a preparation method thereof, wherein the preparation method comprises the following steps: pre-solution treatment: heating the titanium alloy to a solid solution temperature, preserving the heat for a period of time, and cooling the titanium alloy to room temperature by water; laser shock treatment: carrying out surface treatment on the titanium alloy and then carrying out laser shock; and (3) subsequent aging treatment: heating the titanium alloy to an aging temperature, preserving the heat for a period of time, and air-cooling to room temperature. Therefore, after the first heat treatment process, gradient residual stress is applied to the surface of the titanium alloy through laser impact, and then the second heat treatment process is combined to enable the structure on the surface of the titanium alloy to be subjected to gradient precipitation in the aging treatment process, and finally a gradient micro-nano structure can be formed, so that the surface hardness of the material is improved.
Description
Technical Field
The invention relates to the technical field of titanium alloy processing, in particular to a titanium alloy material gradient micro-nano structure utilizing laser impact and a preparation method thereof.
Background
The titanium alloy contains more metal elements and has abundant structural phase change. The heat treatment can regulate and control the structure property of the titanium alloy in a wider range, and is one of the most economical and effective methods at present. However, the requirements of different industries on the performance of the titanium alloy are different, and the surface hardness of the existing titanium alloy is not improved by a good means.
The strengthening effect of the titanium alloy is mainly derived from the strengthening of the alpha phase precipitated in the beta matrix, and particularly the strengthening of the surface. The traditional heat treatment method mainly comprises the steps of solid solution water quenching or air cooling to room temperature at a certain temperature and then aging heat treatment. Although the heat treatment can improve the overall strength and hardness of the titanium alloy, and the structure property of the titanium alloy is very sensitive to the heat treatment process, the improvement of the surface hardness is not outstanding. Particularly, the alpha phase is easy to precipitate unevenly in the aging process, so that the uniformity of the alloy structure is poor, and the hardness improvement of the surface of the titanium alloy is influenced.
Disclosure of Invention
In order to solve the problems, a gradient micro-nano structure of a titanium alloy material by using laser impact and a preparation method thereof are provided, so that the gradient micro-nano structure is formed on the surface of the titanium alloy by using a laser impact and heat treatment method, and the surface hardness of the titanium alloy material is improved.
The invention provides a preparation method of a titanium alloy material gradient micro-nano structure by using laser impact, which is characterized by comprising the following steps:
1) Pre-solution treatment: heating the titanium alloy to a solid solution temperature, preserving the heat for a period of time, and cooling the titanium alloy to room temperature by water;
2) Laser shock treatment: carrying out surface treatment on the titanium alloy and then carrying out laser shock;
3) And (3) subsequent aging treatment: and heating the titanium alloy to an aging temperature, preserving the heat for a period of time, and cooling the titanium alloy to room temperature in air.
Further, the solid solution temperature in the step 1) is 750-850 ℃, and the heat preservation time is 0.5-1.5h.
Further, in the step 2), the laser impact power is 1-5J, and the impact frequency is 1-5.
Further, in the step 2), the aging temperature is 450-550 ℃, and the heat preservation time is 6-12 h.
The second aspect of the present invention is a titanium alloy material produced by the above production method.
Experiments show that if laser shock treatment is carried out before two heat treatment processes, the applied gradient residual stress can be eliminated during solution treatment, and no effect is produced; if the laser shock treatment is carried out after the two heat treatment processes, although the applied gradient residual stress can be retained and the surface hardness of the material is improved to a certain extent, the surface tissue is similar to the rest part, the gradient micro-nano structure cannot be generated, and the improvement on the hardness is limited; therefore, after the first heat treatment process, gradient residual stress is applied to the surface of the titanium alloy through laser impact, and then the second heat treatment process is combined to enable the structure on the surface of the titanium alloy to be subjected to gradient precipitation in the aging treatment process, and finally a gradient micro-nano structure can be formed, so that the surface hardness of the material is improved.
Drawings
FIG. 1 is a microstructure view of a titanium alloy material provided in example 1 of the present invention;
FIG. 2 is a microstructure view of a titanium alloy material provided in example 2 of the present invention;
FIG. 3 is a microstructure view of a titanium alloy material provided in comparative example 1 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Example 1
A titanium alloy material gradient micro-nano structure utilizing laser impact is prepared by the following steps:
1) Pre-solution treatment: heating the Ti-6Cr-5Mo-5V-4Al-1Nb titanium alloy to 850 ℃, preserving heat for 1h, and cooling to room temperature by water;
2) Laser shock treatment: carrying out surface treatment on the titanium alloy, and then carrying out single laser shock with 1J shock power;
3) And (3) subsequent aging treatment: and heating the titanium alloy to 500 ℃, preserving the heat for 6 hours, and cooling the titanium alloy to room temperature in air.
The microhardness tester shows that the surface hardness value of the titanium alloy material strengthened by the strengthening method is 628H 0.2 As can be seen from fig. 1, this is caused by the fact that the secondary alpha phase on the surface of the titanium alloy material obtained by the strengthening method is smaller than that in the rest area, and the alpha phase is uniformly distributed.
Example 2
A titanium alloy material gradient micro-nano structure utilizing laser impact is prepared by the following steps:
1) Pre-solution treatment: heating Ti-6Cr-5Mo-5V-4Al-1Nb titanium alloy to 850 ℃, preserving heat for 1h, and cooling to room temperature by water;
2) Laser shock treatment: carrying out surface treatment on the titanium alloy, and then carrying out 5 times of laser shock with 5J shock power;
3) And (3) subsequent aging treatment: and heating the titanium alloy to 500 ℃, preserving the heat for 6 hours, and cooling the titanium alloy to room temperature in air.
The microhardness tester shows that the surface hardness value of the titanium alloy material strengthened by the strengthening method is 665H 0.2 As can be seen from fig. 1, this is caused by the fact that the secondary alpha phase on the surface of the titanium alloy material obtained by the strengthening method is smaller than that in the rest area, the distribution of the alpha phase is uniform, and the thickness of the affected layer is larger.
Comparative example 1
The titanium alloy material is prepared by the following steps:
1) Pre-solution treatment: heating Ti-6Cr-5Mo-5V-4Al-1Nb titanium alloy to 850 ℃, preserving heat for 1h, and cooling to room temperature by water;
2) Aging treatment: heating the titanium alloy to 500 ℃, preserving the heat for 6 hours, and air-cooling to room temperature;
3) Laser shock treatment: carrying out surface treatment on the titanium alloy, and then carrying out 5 times of laser shock with 5J shock power;
as shown in FIG. 3, the secondary alpha phase on the surface of the titanium alloy strengthened by the strengthening method of the comparative example is similar to that of the rest area, and the distribution is not uniform.
The surface hardness value of the titanium alloy strengthened by the strengthening method of the comparative example is 568H 0.2 。
Comparative example 2
The titanium alloy material is prepared by the following steps:
1) Pre-solution treatment: heating Ti-6Cr-5Mo-5V-4Al-1Nb titanium alloy to 850 ℃, preserving heat for 1h, and cooling to room temperature by water;
2) Aging treatment: and heating the titanium alloy to 500 ℃, preserving the heat for 6 hours, and cooling the titanium alloy to room temperature in air.
The surface hardness value of the titanium alloy strengthened by the strengthening method of the comparative example is 526H 0.2 。
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (5)
1. A preparation method of a titanium alloy material gradient micro-nano structure by using laser impact is characterized by comprising the following steps:
1) Pre-solution treatment: heating the titanium alloy to a solid solution temperature, preserving the heat for a period of time, and cooling the titanium alloy to room temperature by water;
2) Laser shock treatment: carrying out surface treatment on the titanium alloy and then carrying out laser shock;
3) And (3) subsequent aging treatment: and heating the titanium alloy to an aging temperature, preserving the heat for a period of time, and cooling the titanium alloy to room temperature in air.
2. The preparation method according to claim 1, wherein the solid solution temperature in the step 1) is 750-850 ℃, and the holding time is 0.5-1.5h.
3. The preparation method according to claim 1, wherein the laser impact power in step 2) is 1 to 5J and the number of impacts is 1 to 5.
4. The preparation method according to claim 1, wherein the aging temperature in step 2) is 450 to 550 ℃ and the holding time is 6 to 12 hours.
5. A titanium alloy material gradient micro-nano structure utilizing laser impact is characterized by being prepared according to the preparation method of any one of claims 1-4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210875657.7A CN115287560A (en) | 2022-07-25 | 2022-07-25 | Titanium alloy material gradient micro-nano structure utilizing laser impact and preparation method thereof |
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| CN202210875657.7A CN115287560A (en) | 2022-07-25 | 2022-07-25 | Titanium alloy material gradient micro-nano structure utilizing laser impact and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100200123A1 (en) * | 2009-02-11 | 2010-08-12 | Kirkwood Brad L | Hardened titanium structure for transmission gear applications |
| CN103525995A (en) * | 2013-10-30 | 2014-01-22 | 常州市润源经编运用工程技术研究中心有限公司 | Treatment method for improving alloy material strength, toughness, and anti-fatigue life |
| CN104674145A (en) * | 2015-01-30 | 2015-06-03 | 西北工业大学 | Method for hardening TC17 titanium alloy surface |
| CN111334730A (en) * | 2020-02-02 | 2020-06-26 | 江苏大学 | Method for laser shock assisted thermal hydrogen treatment of Ti6Al4V alloy |
| CN114507833A (en) * | 2022-03-10 | 2022-05-17 | 贵州大学 | TB8 titanium alloy bar with gradient layer alpha-phase structure and preparation method thereof |
-
2022
- 2022-07-25 CN CN202210875657.7A patent/CN115287560A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100200123A1 (en) * | 2009-02-11 | 2010-08-12 | Kirkwood Brad L | Hardened titanium structure for transmission gear applications |
| CN103525995A (en) * | 2013-10-30 | 2014-01-22 | 常州市润源经编运用工程技术研究中心有限公司 | Treatment method for improving alloy material strength, toughness, and anti-fatigue life |
| CN104674145A (en) * | 2015-01-30 | 2015-06-03 | 西北工业大学 | Method for hardening TC17 titanium alloy surface |
| CN111334730A (en) * | 2020-02-02 | 2020-06-26 | 江苏大学 | Method for laser shock assisted thermal hydrogen treatment of Ti6Al4V alloy |
| CN114507833A (en) * | 2022-03-10 | 2022-05-17 | 贵州大学 | TB8 titanium alloy bar with gradient layer alpha-phase structure and preparation method thereof |
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Application publication date: 20221104 |