CN105483588B - A kind of preparation method of High-strength pure titanium sheet material - Google Patents
A kind of preparation method of High-strength pure titanium sheet material Download PDFInfo
- Publication number
- CN105483588B CN105483588B CN201510904539.4A CN201510904539A CN105483588B CN 105483588 B CN105483588 B CN 105483588B CN 201510904539 A CN201510904539 A CN 201510904539A CN 105483588 B CN105483588 B CN 105483588B
- Authority
- CN
- China
- Prior art keywords
- deformation
- pure titanium
- sheet material
- molding
- strength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
- C22F3/00—Changing the physical structure of non-ferrous metals or alloys by special physical methods, e.g. treatment with neutrons
-
- 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
Abstract
The present invention provides a kind of preparation method of High-strength pure titanium sheet material, and processing step is：(1) Titanium board material is carried out limitation molding severe plastic deformation at room temperature using controllable pressure testing machine, technological parameter is：Bending die the selection 1~5mm of the facewidth, tooth 1~5mm high, 2~50mm/min of rate of deformation of molding die, deform through 2~3 passages；(2) electric pulse annealing treatment is carried out to Titanium board material between each passage of limitation molding deformation；(3) High-strength pure titanium sheet material is obtained after the final pass treatment for carrying out limitation molding severe plastic deformation.The present invention is combined severe plastic deformation with Electric Pulse Treatment Dominant Facies, the problems such as solving the difficult deformation pure titanium of hexagonal closed-packed and be difficult to cracking in room temperature large plastometric set, deformation process, the Titanium board material of large scale, high intensity can be prepared, compared with former Titanium board material,, more than 160%, tensile strength amplification highest is more than 80% for yield strength amplification highest.
Description
Technical field
The present invention relates to a kind of preparation method of technical field of metal material, more particularly to a kind of High-strength pure titanium sheet material
Preparation method.
Background technology
Pure titanium with its relatively low density, specific strength higher and specific stiffness, good decay resistance, especially with good
High-temperature and durable and excellent biocompatibility, obtained extensively in fields such as biomedicine, Aero-Space, automobile, biologies
General application.However, though pure titanium is with good plasticity, as load bearing component intensity it is not high, abrasion resistance properties are poor, at room temperature
Deformation difficulty etc. constrains the development and application of pure titanium.
Crystal grain thinning is the important channel for improving the strength of materials and comprehensive mechanical performance, and being also uniquely can be while improves material
Material intensity and the method for improving toughness of material.Method and technique currently used for material grains refinement have a lot, such as rapid solidification
(Rapid solidification), mechanical alloying (Mechanical alloying), powder metallurgy (Power
) and severe plastic deformation method (Severe Plastic Deformation, SPD) etc. metallurgy.In the refinement of numerous materials
In method, severe plastic deformation method is a kind of plastic processing method effectively and for the purpose of controlling tissue, can by the method
Directly obtain that fine grain, sub-micro be brilliant and nanometer crystal microstructure, and be remarkably improved the mechanical property of material, especially intensity.
But for the pure titanium of hexagonal closed-packed, because slip system is few, there is severe plastic deformation difficult, at room temperature
The problems such as strain cracking.At present, mainly there is high pressure and torsion (High to the severe plastic deformation method that pure titanium is used
Pressure Torsion, HPT), but it is small-sized using the pure titanium of deformation that HPT methods are obtained, it is difficult to prepare the material of large volume
Material；Using accumulation ply rolling method (Accumulative roll bonding, ARB) to the superposed surfaces roller surface and ring of sheet material
The requirement such as border atmosphere is harsh, is only limitted to prepare pure titanium composite strip using the method, and Material cladding interface is easily caused crackle product
It is raw.Equal channel angular pressing (Equal channel angularpressing, ECAP) is a kind of refinement of new research and development in recent years
Crystal grain, improve the strength of materials large plastometric set technique, but pure titanium ECAP deformation generally carried out under middle temperature, and be still only applicable
In the bar for making small dimension, still there is certain limitation for the preparation of large scale Titanium board material, while mould consumption is tight
Weight.Thus seek a kind of novel process at room temperature so as to put forward high purity titanium intensity, to prepare large-sized Titanium board material, meet pure
The application requirement of titanium, is still key issue urgently to be resolved hurrily at present.
The content of the invention
For the problem that prior art is present, the present invention provides a kind of preparation method of High-strength pure titanium sheet material, the side
Method is aided with electric pulse annealing and processes using room temperature limitation molding severe plastic deformation, can prepare high intensity, large-sized Titanium board
Material.Technical scheme is as follows：
A kind of preparation method of High-strength pure titanium sheet material, is carried out according to following processing step：
(1) Titanium board material is carried out limitation molding severe plastic deformation at room temperature using controllable pressure testing machine, it is described
Limitation molding severe plastic deformation process technological parameter be：The bending die selection 1~5mm of the facewidth of molding die, tooth is high by 1~
5mm, 2~50mm/min of rate of deformation, deform through 2~3 passages；
(2) electric pulse annealing treatment is carried out to Titanium board material between each passage of limitation molding deformation；
(3) High-strength pure titanium sheet material is obtained after the final pass treatment for carrying out limitation molding severe plastic deformation.
The Titanium board material thickness of the step (1) is 1~5mm, its length and it is wide can as needed and testing machine capacity
Selected.
In step (1), the limitation molding deforming moulds of use are made up of limitation mould, bending die, the part of flattening die three, bend
Mould is made up of the upper mould that bends, the lower mould of press-bending and limitation mould；Flattening die is constituted by flattening upper mould, flattening lower mould and limiting mould, is first adopted
With a pair of bending dies to its helical teeth part just to Titanium board material part carry out detrusion；Next using flattening die to pure titanium
The part that sheet material occurs detrusion is flattened；Titanium board material is horizontally rotated 180 ° again, sheet material is remained according to above-mentioned steps
The part of Yu Wei generation detrusions flattens again after carrying out detrusion, and this is 1 deformation process of passage, is become through 2~3 passages
The deformation sheet material of step (1) is obtained after shape.
The electric pulse annealing treatment of the step (2) is only carried out between limitation molding severe plastic deformation passage, limits mould
Last a time of severe plastic deformation is pressed to obtain High-strength pure titanium sheet material after terminating；The technique of the electric pulse annealing treatment
Parameter is：Pulse current density is 0.1~1kA/mm2, 10~50Hz of pulse current frequency, the μ s of pulsewidth 10~30, process time 1
~30min.
The principle of technical solution of the present invention is explained：
Difficult deformation close-packed hexagonal Titanium board material is set to be achieved room temperature at room temperature using limitation molding deformation technique violent
Plastic deformation, is characterized in that apparatus and process is simple, and rear size constancy, lumber recovery are high before being deformed for material, and can obtain large scale
Titanium board material.Because pure titanium has close-packed hexagonal structure, slip system is few, and deformation is difficult, while pure titanium has part higher
Shearing sensibility, therefore conventional severe plastic deformation technique can only make small size pure titanium material that severe plastic deformation occurs, while
The titanium material that can only obtain small size is limited by conventional HPT, ECAP mould.And the limitation molding deformation technique that the present invention is used
Make in each press bending process helical teeth part (1~5mm) just to Titanium board material part carry out detrusion, equivalent to pure titanium
The zonule that sheet material is divided into several 1~5mm is deformed, you can obtain large-sized Titanium board by increasing the bending die number of teeth
Material, in other words, can as needed and pressure testing machine maximum capacity carrys out the size of unrestricted choice Titanium board material.Titanium board material exists
Detrusion is subject under plane stress condition, and by carrying out repeated multiple times press-bending, straightening deformation technique to sample, can be had
The a large amount of strains of effect accumulation, reach crystal grain thinning, improve the purpose of intensity.
Between deformation use electric pulse annealing, compared with conventional anneal process electric pulse annealing with relatively low energy, very
In the short time, can both change the tissue morphology of sheet material, the residual stress in limitation molding deformation sample can be effectively eliminated again,
The plasticity of material is improved, prevents pure titanium violent because what is be plastically deformed, crackle occurs too early in sample in follow-up mold process, or even
Fracture.When using electric pulse annealing can solve conventional anneal process simultaneously and material plasticity index is increased, intensity and hardness
But the problem for substantially reducing, it is to avoid due to causing the final degree of grain refinement of Titanium board material to decline and intensity using intermediate annealing
Reduction.In addition to fuel factor promotes atoms permeating, pulse current is given full play to and has promoted dislocation motion and atomic migration, significantly
Reduce dislocation tangle, the feature of material plasticity improved, by the impulsive force of high speed drift electron and high speed drift electron and atom
During nuclear bonbardment power is instantaneously incorporated into metal in the form of stress energy higher, heat energy and the electric energy, due to the shadow of electricity, heat and power
Ring, material structure develop show uniqueness feature such as Electric Pulse Treatment after occur crystal grain refinement or tiny substructure from
And the intensity of material is maintained and is increased substantially plasticity.
Feature of the invention and have the beneficial effect that：The present invention is combined severe plastic deformation with Electric Pulse Treatment Dominant Facies,
The problems such as solving the difficult deformation pure titanium of hexagonal closed-packed and be difficult to cracking in room temperature large plastometric set, deformation process；
Avoiding conventional anneal process simultaneously makes material plasticity recover the problems such as intensity declines simultaneously.Can be made using technical solution of the present invention
Standby large-sized High-strength pure titanium sheet material, and prepared Titanium board material crystallite dimension is tiny, even tissue can reach sub-micron
Rank；Compared with former Titanium board material, more than 160%, tensile strength amplification highest is more than 80% for yield strength amplification highest.
Brief description of the drawings
Fig. 1 is that the limitation of the embodiment of the present invention 1 is molded the mould structure schematic diagram that severe plastic deformation process is used, its
In (a) represent bending die structural representation, (b) represent flattening die structural representation；
Fig. 2 is the microscopic structure contrast of the Titanium board material that the embodiment of the present invention 1 is used and the High-strength pure titanium sheet material for obtaining
Figure, wherein (a) is Titanium board material raw material, (b) is High-strength pure titanium sheet material；
Fig. 3 is the tensile property contrast of the Titanium board material that the embodiment of the present invention 1 is used and the High-strength pure titanium sheet material for obtaining
Figure, is 2. High-strength pure titanium sheet material wherein being 1. Titanium board material raw material.
Specific embodiment
The Titanium board material that the present invention implements to use is commercially available prod.
The controllable pressure testing machine that the present invention implements to use is 600KN hydraulic dynamometers.
The electric pulse annealing instrument that the present invention implements to use is HPC-5 type impulse current generators.
Embodiment 1
With size it is the Titanium board material TA1 of 78 × 78 × 2mm as raw material, the method for preparing High-strength pure titanium sheet material, according to
Following processing step is carried out：
(1) Titanium board material TA1 is carried out by limitation molding severe plastic deformation, work using controllable pressure testing machine at room temperature
Skill parameter is：Bending die the selection facewidth 2mm, tooth 2mm high, 10~20mm/min of rate of deformation of molding die, the deformation of 3 passages；
(2) electric pulse annealing treatment, i.e. electric pulse is carried out to Titanium board material between each passage of limitation molding deformation to move back
Fire is processed, and technological parameter is：Pulse current density is 0.3~0.6kA/mm2, 20~30Hz of pulse current frequency, the μ s of pulsewidth 30,
2~10min of process time, electric pulse annealing number of processes is 2 times；
(3) High-strength pure titanium sheet material is obtained after the 3rd passage treatment for carrying out limitation molding severe plastic deformation.
Experimental result：The yield strength and tensile strength of pure titanium TA1 are respectively 166MPa and 280MPa, and elongation percentage is
56%；The yield strength and tensile strength of High-strength pure titanium sheet material manufactured in the present embodiment are respectively 440MPa and 510MPa, prolong
It is 9.6% to stretch rate, it is seen that yield strength and tensile strength amplification about 165% and 82%, elongation percentage is still maintained at 10% or so.
Embodiment 2
With size it is the Titanium board material TA1ELI of 102 × 102 × 1.5mm as raw material, prepares the side of High-strength pure titanium sheet material
Method, is carried out according to following processing step：
(1) Titanium board material TA1ELI is carried out into the limitation violent plasticity of molding at room temperature using controllable pressure testing machine to become
Shape, technological parameter is：Bending die the selection facewidth 1.5mm, tooth 1.5mm high, 3~10mm/min of rate of deformation, 2 roads of molding die
Secondary deformation；
(2) electric pulse annealing treatment, i.e. electric pulse is carried out to Titanium board material between each passage of limitation molding deformation to move back
Fire is processed, and technological parameter is：Pulse current density is 0.2~0.4kA/mm2, 10~30Hz of pulse current frequency, the μ s of pulsewidth 10,
1~5min of process time, electric pulse annealing number of processes is 1 time；
(3) High-strength pure titanium sheet material is obtained after the 2nd passage treatment for carrying out limitation molding severe plastic deformation.
Experimental result：The yield strength and tensile strength of pure titanium TA1 ELI are respectively 205MPa and 320MPa, and elongation percentage is
46%；The yield strength and tensile strength of High-strength pure titanium sheet material manufactured in the present embodiment are respectively 495MPa and 540MPa, prolong
It is 8% to stretch rate, it is seen that yield strength and tensile strength have been respectively increased about 141% and 69%, and it is left that elongation percentage is still maintained at 10%
It is right.
Embodiment 3
With size it is the Titanium board material TA2 of 52 × 52 × 3mm as raw material, the method for preparing High-strength pure titanium sheet material, according to
Following processing step is carried out：
(1) Titanium board material TA2 is carried out by limitation molding severe plastic deformation, work using controllable pressure testing machine at room temperature
Skill parameter is：Bending die the selection facewidth 3mm, tooth 3mm high, 30~40mm/min of rate of deformation of molding die, the deformation of 3 passages；
(2) electric pulse annealing treatment, i.e. electric pulse is carried out to Titanium board material between each passage of limitation molding deformation to move back
Fire is processed, and technological parameter is：Pulse current density is 0.5~0.8kA/mm2, 20~40Hz of pulse current frequency, the μ s of pulsewidth 20,
5~15min of process time, electric pulse annealing number of processes is 2 times；
(3) High-strength pure titanium sheet material is obtained after the 3rd passage treatment for carrying out limitation molding severe plastic deformation.
Experimental result：The yield strength and tensile strength of pure titanium TA2 are respectively 307MPa and 465MPa, and elongation percentage is
48%；The yield strength and tensile strength of High-strength pure titanium sheet material manufactured in the present embodiment are respectively 615MPa and 730MPa, prolong
It is 9% to stretch rate, it is seen that yield strength and tensile strength have been respectively increased about 100% and 57%, and it is left that elongation percentage is still maintained at 10%
It is right.
Claims (2)
1. a kind of preparation method of High-strength pure titanium sheet material, it is characterised in that carried out according to following processing step：
(1) Titanium board material is carried out limitation molding severe plastic deformation, the limitation at room temperature using controllable pressure testing machine
Be molded severe plastic deformation process technological parameter be：Bending die selection 1~5mm of the facewidth, the tooth 1~5mm high of molding die, become
Shape 2~50mm/min of speed, deforms through 2~3 passages；
(2) electric pulse annealing treatment is carried out to Titanium board material between each passage of limitation molding deformation；
(3) High-strength pure titanium sheet material is obtained after the final pass treatment for carrying out limitation molding severe plastic deformation.
2. the preparation method of a kind of High-strength pure titanium sheet material according to claim 1, it is characterised in that the electric pulse is moved back
Fire treatment technological parameter be：Pulse current density is 0.1~1kA/mm2, 10~50Hz of pulse current frequency, pulsewidth 10~30
μ s, 1~30min of process time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510904539.4A CN105483588B (en) | 2015-12-09 | 2015-12-09 | A kind of preparation method of High-strength pure titanium sheet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510904539.4A CN105483588B (en) | 2015-12-09 | 2015-12-09 | A kind of preparation method of High-strength pure titanium sheet material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105483588A CN105483588A (en) | 2016-04-13 |
| CN105483588B true CN105483588B (en) | 2017-06-30 |
Family
ID=55670851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510904539.4A Active CN105483588B (en) | 2015-12-09 | 2015-12-09 | A kind of preparation method of High-strength pure titanium sheet material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105483588B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817518B (en) * | 2016-05-12 | 2018-08-31 | 北京机电研究所有限公司 | A kind of method and apparatus promoting magnesium alloy room temperature forming property |
| CN106238488A (en) * | 2016-09-14 | 2016-12-21 | 中国科学院金属研究所 | Different pressures cut the method and apparatus of continuous large plastometric set under composite strain path |
| CN107699830B (en) * | 2017-08-15 | 2019-04-12 | 昆明理工大学 | Method that is a kind of while improving industrially pure titanium intensity and plasticity |
| CN109930028A (en) * | 2019-03-29 | 2019-06-25 | 盐城华旭机械制造有限公司 | One kind being based on stamping forming metal plate plate and its processing technology |
| CN111515284B (en) * | 2020-04-30 | 2021-05-18 | 燕山大学 | Strong deformation device and process for plate |
| CN114058991B (en) * | 2021-11-23 | 2022-05-03 | 四川大学 | High-strength superfine twin crystal pure titanium and preparation method thereof |
| CN114293120B (en) * | 2021-12-30 | 2023-02-07 | 温州大学 | Pulse electric field auxiliary heat treatment method for improving plasticity and toughness of titanium alloy |
| CN114507829B (en) * | 2022-01-14 | 2022-11-18 | 山东大学 | Preparation device and method of aluminum and aluminum alloy plate |
| CN114990460A (en) * | 2022-05-27 | 2022-09-02 | 中国船舶重工集团公司第七二五研究所 | Method for improving plasticity of high-strength titanium alloy bolt by pulse current |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57181775A (en) * | 1981-04-30 | 1982-11-09 | Nissan Motor Co Ltd | Welding method for titanium alloy |
| DE102005022506B4 (en) * | 2005-05-11 | 2007-04-12 | Universität Stuttgart | Method for forging a titanium alloy component |
| CN101817071A (en) * | 2009-10-30 | 2010-09-01 | 兰州理工大学 | Electric pulse casting and rolling method of semi-solid alloy |
| WO2014196042A1 (en) * | 2013-06-05 | 2014-12-11 | 株式会社神戸製鋼所 | Forged titanium alloy material and method for producing same, and ultrasonic testing method |
| CN104694865A (en) * | 2015-03-03 | 2015-06-10 | 西北工业大学 | Electric pulse regression treatment method for aluminum alloy |
-
2015
- 2015-12-09 CN CN201510904539.4A patent/CN105483588B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105483588A (en) | 2016-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105483588B (en) | A kind of preparation method of High-strength pure titanium sheet material | |
| US10077492B2 (en) | Ultrafine-grained profile of twin-crystal wrought magnesium alloys, preparation process and use of the same | |
| CN101463454B (en) | Method for preparing bulk nano/superfine crystal grain magnesium alloy by twinning deformation | |
| CN103014574B (en) | Preparation method of TC18 ultra-fine grain titanium alloy | |
| CN104532057B (en) | A kind of Ti6242 titanium alloy and the preparation method of small-sized bar thereof | |
| CN102312143B (en) | Forging method of high-strength heatproof magnesium alloy | |
| CN102978544B (en) | Method for multilevel creep age forming of Al-Zn-Mg-Cu series aluminium alloy plate | |
| CN102989764B (en) | High-yield processing method of ultra-fine crystal magnesium alloy thin plate | |
| CN105414426B (en) | A kind of hot-swage method of kirsite small specification tube or bar | |
| CN101586223A (en) | Wrought magnesium alloys containing rare earth | |
| CN107574394A (en) | A kind of preparation method of medical ultra-fine grain TC4 titanium alloy plates | |
| CN103237915A (en) | Method for manufacturing deformed articles from pseudo-beta-titanium alloys | |
| CN103898424A (en) | Method for refining magnesium alloy crystal grains | |
| CN103572186B (en) | Equal-diameter bending passage deformation is adopted to prepare the method for ultra-fine grain titanium matrix composite | |
| CN109097713B (en) | A kind of Ultra-fine Grained Ta material and preparation method thereof | |
| CN106350713A (en) | Al-Mg-Si alloy and preparation process of Al-Mg-Si alloy panel | |
| CN103170797A (en) | Compound extrusion preparation method of large-diameter high-quality tube blank or annular blank | |
| CN106011681A (en) | Method capable of improving mechanical property of 316 LN austenitic stainless steel | |
| CN110331348A (en) | Amorphous alloy material, amorphous alloy flexbile gear and preparation method thereof | |
| CN106890865A (en) | Major diameter AQ80M magnesium alloy cakes material squeezes the integrated forming technology of forging | |
| CN105349829A (en) | Titanium alloy Ti80 seamless tube and preparation method thereof | |
| CN103447433A (en) | Preparation method of large-sized magnesium alloy forged disc | |
| CN105441713A (en) | A titanium alloy seamless tube and a manufacturing method thereof | |
| CN104226684B (en) | A kind of thick Ti of 0.1mm2The cold-rolling process of AlNb base alloy foil | |
| CN105478523A (en) | Preparation technology for medical beta type titanium alloy capillary tubes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |