CN107699830A - Method that is a kind of while improving industrially pure titanium intensity and plasticity - Google Patents
Method that is a kind of while improving industrially pure titanium intensity and plasticity Download PDFInfo
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- CN107699830A CN107699830A CN201710696551.XA CN201710696551A CN107699830A CN 107699830 A CN107699830 A CN 107699830A CN 201710696551 A CN201710696551 A CN 201710696551A CN 107699830 A CN107699830 A CN 107699830A
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- plasticity
- intensity
- ball
- sheet material
- pure titanium
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 55
- 239000010936 titanium Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 71
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000000498 ball milling Methods 0.000 claims abstract description 21
- 238000000137 annealing Methods 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 15
- 238000011282 treatment Methods 0.000 claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 230000007547 defect Effects 0.000 claims abstract description 8
- 230000001419 dependent effect Effects 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 239000011261 inert gas Substances 0.000 claims abstract description 6
- 238000003801 milling Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000003913 materials processing Methods 0.000 abstract description 2
- 239000013078 crystal Substances 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000005728 strengthening Methods 0.000 description 5
- 239000002086 nanomaterial Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
-
- 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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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The present invention relates to method that is a kind of while improving industrially pure titanium intensity and plasticity, belong to materials processing technology field.Titanium board material is surface-treated through milling machine processing first, after removing surface defect and impurity, 2 hours are incubated in 700 DEG C；By Titanium board material under vacuum or inert gas shielding, rotary speed is 860 ~ 890r/min, and frequency is 50 ~ 60Hz, 1 ~ 3h of ball-milling treatment；Titanium board material is immersed in liquid nitrogen after cooling down 5 ~ 10min and rolled；The dependent variable of sheet material reaches 92% ~ 98% before and after rolling, and 5 ~ 10min of cooling in liquid nitrogen will be immersed before every time rolling, and sheet material final thickness is 1mm；By sheet material at 450 ~ 520 DEG C 5 ~ 10min of vacuum annealing, be prepared while improve intensity and the industrially pure titanium sheet material of plasticity.This method obtains a kind of, than conventional annealing intensity higher, material of excellent combination property better than large plastometric set plasticity by ball-milling treatment, the method that liquid nitrogen is rolled, process annealing is combined.
Description
Technical field
The present invention relates to method that is a kind of while improving industrially pure titanium intensity and plasticity, belong to materials processing technology field.
Background technology
The means of usual strengthening material have solution strengthening, refined crystalline strengthening, second-phase strength etc., and its essence is all in the material
All kinds of defects are introduced, make dislocation motion difficult, so as to reach the purpose of strengthening material.And refined crystalline strengthening is uniquely a kind of improving
The method of the strength of materials plasticity of and can improvement simultaneously.
In the past few decades, Development of Nanometer Material is rapid, because of its excellent mechanical property by widely studied, with tradition
Coarse grain material is compared, and nano material strong hardness is high, and wearability, corrosion resistance, fatigue resistance are good.At the same time, also occur being permitted
More Nanostructured bulk technologies of preparing.These preparation methods can be divided into two major classes：A kind of method " from bottom to top ", with single original
Son or nano particle are prepared for elementary cell；Another kind of method " from top to bottom ", by specific processing technology in material
Inside introduces the defects of substantial amounts of dislocation twin, refines former coarse-grain crystal grain.Severe Plastic Deformation Methods be the 1990s by
Russian scientist R.Z.Valiev is developed on the basis of pure shear large deformation experiment is carried out, and so-called big plasticity becomes
Shape, just refer to method of the material by forming the bulk nanostructured material with nanocrystal after violent plastic deformation, now
Conventional large plastometric set technique has：High pressure torsion（HPT）, Equal Channel Angular Pressing（ECAP）, Hopkinson technology（SHPB）Deng.
By nano material made from large plastometric set technique, although intensity is increased substantially, plasticity is often
Very poor, fracture elongation is usually less than 5%, and which limits applications to nanostructures field.Its reason can be summarized as：Nanometer material
Expect that crystallite dimension is tiny, cause dislocation to be absorbed and can not be accumulated in follow-up plastic deformation by crystal boundary, it is hard to lose processing
Change ability, so as to show low elongation percentage.
By ball-milling technology, material surface crystal grain can be refined to below 100nm, but center portion remains in that former coarse-grain
Crystal grain, so as to form a kind of gradient-structure constantly refined from table and inner crystal grain, this gradient in the range of the certain depth of surface
The combination of structure and coarse structure to remain good plasticity while the strength of materials improves again.But by ball milling at
Reason, the strength of materials improve very limited.How to improve industrially pure titanium intensity and plasticity is a problem.
The content of the invention
For the above-mentioned problems of the prior art and deficiency, the present invention provide it is a kind of improve simultaneously industrially pure titanium intensity and
The method of plasticity.This method obtains one kind than big plasticity by ball-milling treatment, the method that liquid nitrogen is rolled, process annealing is combined
It is good to deform plasticity, the material of excellent combination property higher than conventional annealing intensity, and obtained by this technique, material surface
Strengthen, wearability, corrosion resistance, fatigue behaviour are largely increased.The present invention is achieved through the following technical solutions.
The present invention makes material produce large plastometric set using surface ball-milling technology, and then forms a grain size gradient point
The gradient-structure of cloth；Then liquid nitrogen rolling is carried out again, and its intensity is further improved while gradient-structure is kept；Finally pass through
Annealed between low-temperature short-time, there is material and change in gradient from table and inner crystallite dimension, and there is subregion little crystal grain bag
The surface of large grain character is enclosed, and little crystal grain surrounds the center portion of big crystal grain, so as to form a kind of material of strong plasticity no-float
Material.
Method that is a kind of while improving industrially pure titanium intensity and plasticity, its specific steps include：
Step 1, Titanium board material is surface-treated through milling machine processing first, after removing surface defect and impurity, in 700 DEG C of guarantors
Temperature 2 hours；
Step 2, by the Titanium board material handled through step 1 under vacuum or inert gas shielding, rotary speed is 860 ~ 890r/
Min, frequency are 50 ~ 60Hz, 1 ~ 3h of ball-milling treatment；
Step 3, the Titanium board material after step 2 ball-milling treatment is immersed in liquid nitrogen and rolled after 5 ~ 10min of cooling；Roll front and rear panel
The dependent variable of material reaches 92% ~ 98%, and 5 ~ 10min of cooling, sheet material final thickness in liquid nitrogen will be immersed before every time rolling
For 1mm；
Step 4, by through the sheet material that step 3 is handled at 450 ~ 520 DEG C 5 ~ 10min of vacuum annealing, be prepared while improve
The industrially pure titanium sheet material of intensity and plasticity.
Titanium board material thickness is 2mm in the step 1.
The steel ball that 5 ~ 10 4 ~ 8mm of Φ are put into step 2 ball-milling treatment carries out ball milling.
The beneficial effects of the invention are as follows：
（1）The intensity of industrially pure titanium prepared by the method for the invention is largely increased, while keeps its good plasticity again, and
Surface property is improved；Specifically：Ball-milling treatment is carried out, material can obtain one from surface to center portion grain size gradient
The gradient-structure of increase.And because titanium belongs to close-packed hexagonal, make dislocation motion difficult in high strain rate deformation, easily produce
Raw twin.
（2）The present invention carries out zerolling after surface mechanical attrition treatment, crystallite dimension up to 100 nanometers with
Under, according to Hall-Petch formula, the strength of materials significantly increases, but crystallite dimension reach nanoscale after plasticity it is very poor.Using 450
~ 520 DEG C of short time annealing.Under this temperature, time, material has to be changed in gradient from table and inner crystallite dimension, and is had
Subregion little crystal grain surrounds the surface of large grain character；Little crystal grain surrounds the center portion of big crystal grain.This special microstructure
So that material has good plasticity again while intensity is kept.
Brief description of the drawings
Fig. 1 is the present invention through embodiment 1,2,3 while improves the industrially pure titanium and annealed state of intensity and plasticity（700
DEG C annealing 2 hours）Industrially pure titanium sheet material room temperature tensile curve ratio relatively scheme.
Embodiment
With reference to the accompanying drawings and detailed description, the invention will be further described.
Embodiment 1
This improves the method for industrially pure titanium intensity and plasticity simultaneously, and its specific steps includes：
Step 1, first by Titanium board material（2mm）It is surface-treated through milling machine processing, after removing surface defect and impurity, in
700 DEG C are incubated 2 hours；
Step 2, by the Titanium board material handled through step 1 under vacuum or inert gas shielding, be fixed on ball grinder center, and put
The steel ball for entering 5 Φ 8mm carries out ball milling, and the rotary speed of ball grinder is 860r/min, frequency 50Hz, processing time 1h；
Step 3, the Titanium board material after step 2 ball-milling treatment is immersed in liquid nitrogen and rolled after cooling 5min；Sheet material before and after rolling
Dependent variable reach 92% ~ 98%, and will be immersed before every time rolling and 5min is cooled down in liquid nitrogen, sheet material final thickness is
1.045mm；
Step 4, by through the sheet material that step 3 is handled at 450 DEG C vacuum annealing 10min, be prepared at the same improve intensity and
The industrially pure titanium sheet material of plasticity.
It is bent that the stretching of the industrially pure titanium sheet material of intensity and plasticity at room temperature is improved while the present embodiment is prepared
Line is as shown in curve 2 in Fig. 1, as seen from the figure：Preparation-obtained pure titanium yield strength is 255.6MPa, and tensile strength is
365.5MPa, uniform elongation 16.6%；Compared with the industrially pure titanium of 700 DEG C of annealing 2 hours, what the present embodiment was prepared
Pure titanium yield strength lifting 34%, uniform elongation improves 44%, has an excellent mechanical property, wearability, corrosion resistance, resist it is tired
Labor gets a promotion simultaneously.
Embodiment 2
This improves the method for industrially pure titanium intensity and plasticity simultaneously, and its specific steps includes：
Step 1, first by Titanium board material（2mm）It is surface-treated through milling machine processing, after removing surface defect and impurity, in
700 DEG C of insulation 2h；
Step 2, by the Titanium board material handled through step 1 under vacuum or inert gas shielding, be fixed on ball grinder center, and put
The steel ball for entering 10 Φ 4mm carries out ball milling, and the rotary speed of ball grinder is 890r/min, frequency 60Hz, processing time 3h；
Step 3, the Titanium board material after step 2 ball-milling treatment is immersed in liquid nitrogen and rolled after cooling 10min；Sheet material before and after rolling
Dependent variable reach 92% ~ 98%, and will be immersed before every time rolling and 10min is cooled down in liquid nitrogen, sheet material final thickness is
1.062mm；
Step 4, by through the sheet material that step 3 is handled at 520 DEG C vacuum annealing 5min, be prepared while improve intensity and modeling
The industrially pure titanium sheet material of property.
It is bent that the stretching of the industrially pure titanium sheet material of intensity and plasticity at room temperature is improved while the present embodiment is prepared
Line is as shown in curve 3 in Fig. 1, as seen from the figure：Preparation-obtained pure titanium yield strength is 252.4MPa, and tensile strength is
359.3MPa, uniform elongation 15.5%；Compared with the industrially pure titanium of 700 DEG C of annealing 2 hours, what the present embodiment was prepared
Pure titanium yield strength lifting 32.7%, uniform elongation improves 34.8%, has an excellent mechanical property, wearability, corrosion resistance,
Fatigue resistance gets a promotion simultaneously.
Embodiment 3
This improves the method for industrially pure titanium intensity and plasticity simultaneously, and its specific steps includes：
Step 1, first by Titanium board material（2mm）It is surface-treated through milling machine processing, after removing surface defect and impurity, in
700 DEG C are incubated 2 hours；
Step 2, by the Titanium board material handled through step 1 under vacuum or inert gas shielding, be fixed on ball grinder center, and put
The steel ball for entering 8 Φ 6mm carries out ball milling, and the rotary speed of ball grinder is 880r/min, frequency 55Hz, processing time 2h；
Step 3, the Titanium board material after step 2 ball-milling treatment is immersed in liquid nitrogen and rolled after cooling 8min；Sheet material before and after rolling
Dependent variable reach 92% ~ 98%, and will be immersed before every time rolling and 8min is cooled down in liquid nitrogen, sheet material final thickness is
1.085mm；
Step 4, by through the sheet material that step 3 is handled at 470 DEG C vacuum annealing 8min, be prepared while improve intensity and modeling
The industrially pure titanium sheet material of property.
It is bent that the stretching of the industrially pure titanium sheet material of intensity and plasticity at room temperature is improved while the present embodiment is prepared
Line is as shown in curve 4 in Fig. 1, as seen from the figure：Preparation-obtained pure titanium yield strength is 282.2MPa, and tensile strength is
371.9MPa, uniform elongation 11.2%；Compared with the industrially pure titanium of 700 DEG C of annealing 2 hours, what the present embodiment was prepared
Pure titanium yield strength lifting 48.4%, uniform elongation is held essentially constant, and has an excellent mechanical property, wearability, corrosion-resistant
Property, fatigue resistance get a promotion simultaneously.
Above in association with accompanying drawing to the present invention embodiment be explained in detail, but the present invention be not limited to it is above-mentioned
Embodiment, can also be before present inventive concept not be departed from those of ordinary skill in the art's possessed knowledge
Put that various changes can be made.
Claims (3)
1. method that is a kind of while improving industrially pure titanium intensity and plasticity, it is characterised in that specific steps include：
Step 1, Titanium board material is surface-treated through milling machine processing first, after removing surface defect and impurity, in 700 DEG C of guarantors
Temperature 2 hours；
Step 2, by the Titanium board material handled through step 1 under vacuum or inert gas shielding, rotary speed is 860 ~ 890r/
Min, frequency are 50 ~ 60Hz, 1 ~ 3h of ball-milling treatment；
Step 3, the Titanium board material after step 2 ball-milling treatment is immersed in liquid nitrogen and rolled after 5 ~ 10min of cooling；Roll front and rear panel
The dependent variable of material reaches 92% ~ 98%, and 5 ~ 10min of cooling, sheet material final thickness in liquid nitrogen will be immersed before every time rolling
For 1mm；
Step 4, by through the sheet material that step 3 is handled at 450 ~ 520 DEG C 5 ~ 10min of vacuum annealing, be prepared while improve
The industrially pure titanium sheet material of intensity and plasticity.
2. method that is according to claim 1 while improving industrially pure titanium intensity and plasticity, it is characterised in that：The step
Titanium board material thickness is 2mm in 1.
3. method that is according to claim 1 while improving industrially pure titanium intensity and plasticity, it is characterised in that：The step
The steel ball that 5 ~ 10 4 ~ 8mm of Φ are put into 2 ball-milling treatments carries out ball milling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710696551.XA CN107699830B (en) | 2017-08-15 | 2017-08-15 | Method that is a kind of while improving industrially pure titanium intensity and plasticity |
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| CN201710696551.XA CN107699830B (en) | 2017-08-15 | 2017-08-15 | Method that is a kind of while improving industrially pure titanium intensity and plasticity |
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| CN107699830B CN107699830B (en) | 2019-04-12 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295334A (en) * | 2019-07-16 | 2019-10-01 | 常州大学 | A kind of preparation method of high-strength and high-plasticity multilevel structure industrially pure titanium |
| CN110976855A (en) * | 2019-11-01 | 2020-04-10 | 昆明理工大学 | Method for simultaneously improving strength and plasticity of titanium material |
| CN111004987A (en) * | 2019-12-27 | 2020-04-14 | 湖南大学 | Method for regulating and controlling mechanical property of metastable β titanium alloy |
| CN111041395A (en) * | 2018-10-12 | 2020-04-21 | 南京理工大学 | Ultra-high density twin crystal titanium and preparation method thereof |
| CN113414548A (en) * | 2021-06-11 | 2021-09-21 | 兰州理工大学 | Preparation method of large-size high-strength high-conductivity CuCr alloy with ultrafine crystal structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101580924A (en) * | 2009-06-25 | 2009-11-18 | 上海交通大学 | Pure titanium two-step plastic deformation processing method |
| CN105483588A (en) * | 2015-12-09 | 2016-04-13 | 东北大学 | Preparation method for high-strength pure titanium panels |
| CN106367634A (en) * | 2010-01-22 | 2017-02-01 | 冶联科技地产有限责任公司 | Method for increasing strength and toughness of titanium alloys |
-
2017
- 2017-08-15 CN CN201710696551.XA patent/CN107699830B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101580924A (en) * | 2009-06-25 | 2009-11-18 | 上海交通大学 | Pure titanium two-step plastic deformation processing method |
| CN106367634A (en) * | 2010-01-22 | 2017-02-01 | 冶联科技地产有限责任公司 | Method for increasing strength and toughness of titanium alloys |
| CN105483588A (en) * | 2015-12-09 | 2016-04-13 | 东北大学 | Preparation method for high-strength pure titanium panels |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111041395A (en) * | 2018-10-12 | 2020-04-21 | 南京理工大学 | Ultra-high density twin crystal titanium and preparation method thereof |
| CN110295334A (en) * | 2019-07-16 | 2019-10-01 | 常州大学 | A kind of preparation method of high-strength and high-plasticity multilevel structure industrially pure titanium |
| CN110295334B (en) * | 2019-07-16 | 2020-11-24 | 常州大学 | Preparation method of high-strength high-plasticity industrial pure titanium with multi-level structure |
| CN110976855A (en) * | 2019-11-01 | 2020-04-10 | 昆明理工大学 | Method for simultaneously improving strength and plasticity of titanium material |
| CN111004987A (en) * | 2019-12-27 | 2020-04-14 | 湖南大学 | Method for regulating and controlling mechanical property of metastable β titanium alloy |
| CN113414548A (en) * | 2021-06-11 | 2021-09-21 | 兰州理工大学 | Preparation method of large-size high-strength high-conductivity CuCr alloy with ultrafine crystal structure |
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| CN107699830B (en) | 2019-04-12 |
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