CN105951019A - Thermal processing method for preparing multi-scale and multi-configuration double-phase titanium alloy structure - Google Patents
Thermal processing method for preparing multi-scale and multi-configuration double-phase titanium alloy structure Download PDFInfo
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- CN105951019A CN105951019A CN201610513889.2A CN201610513889A CN105951019A CN 105951019 A CN105951019 A CN 105951019A CN 201610513889 A CN201610513889 A CN 201610513889A CN 105951019 A CN105951019 A CN 105951019A
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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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- 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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
Abstract
The invention belongs to the field of metal materials and particularly relates to a thermal processing method for preparing a multi-scale and multi-configuration double-phase titanium alloy structure. According to the thermal processing method, the proportion of an Alpha phase to a Beta phase in double-phase titanium alloy is controlled through short-time heating and temperature maintaining so that the double phases are capable of co-coordinating thermal deformation. In a double-phase region, a relatively high deformation speed and a relatively large deformation degree are adopted to perform thermal deformation so that the equiaxial original Alpha phase has a Beta phase change, and finally the equiaxial Alpha phase is changed into a refined structure composed of double-phase laths. Meanwhile, during a water quenching process, a cooling phase change happens inside a Beta lath to form a finer Alpha needle-shaped sub-stable phase. Through the process, a double-phase titanium alloy refined structure with a multi-scale and multi-configuration structure can be obtained finally. The preparation method of the double-phase titanium alloy refined structure has the characteristics of being simple in technological procedures, easy to control, low in energy consumption, high in efficiency and the like.
Description
Technical field:
The hot-working method of the processing method that the present invention relates to a kind of metal material, particularly biphase titanium alloy.
Background technology:
Titanium alloy has higher specific strength, good corrosion resistance and chemical stability, is widely used in space flight
Aviation field, biomedical sector and auto industry field etc..In different types of titanium alloy, two-phase
Titanium alloy is most widely used general, and usage amount is maximum.Substantial amounts of studies have found that, refinement titanium alloy tissue can
It is greatly improved the intensity of titanium alloy, fatigue behaviour and machinability, titanium alloy can be effectively reduced and use into
This.
At present, the titanium alloy microstructure refinement method of (disclosed) of reporting for work is broadly divided into two big classes: mould the most greatly
Property deformation method and β monophase field heat treatment prefabricated metastable phase refinement method.Such as, the Li Hongyang of Beijing Institute of Technology
Large plastometric set (Chinese invention patent, the notification number compound with detrusion is reversed etc. proposing to utilize
CN102234752B), by titanium alloy carries out the big distortion of multi-pass, promote α phase to refine,
Finally realize the refinement of titanium alloy tissue.The Liu Bin of Central South University etc. propose and utilize α, and " tiltedly side's martensite is micro-
Structure prepares the method (Chinese patent, notification number CN104451490A) of ultra-fine grain titanium alloy, by by double
Phase titanium alloy carries out the Technology for Heating Processing of shrend after β phase region long-time heat preservation (1-4h), preparation tiltedly side's geneva
Body metastable phase, then carries out thermal deformation and annealing to the biphase titanium alloy containing metastable phase, and finally obtains
The thinning microstructure of titanium alloy.The Hiroaki Matsumoto etc. of northeastern Japan university proposes and utilizes α ' oblique six
The method (United States Patent (USP), notification number US20150159252) of side's martensite metastable phase refinement biphase titanium alloy,
Obtain the titanium alloy thinning microstructure about 0.5 μm.In above method, large plastometric set method processing technique is numerous
Trivial, inefficient, be not suitable for preparing large scale product.Prefabricated metastable phase refinement method work flow is complicated, and
And due to the unstability of metastable phase self, difficulty of processing is relatively big, is unfavorable for obtaining stable thinning microstructure.
Summary of the invention:
It is an object of the invention to provide a kind of technological process simple, it is easy to controlling, consume energy low, efficiency is high
Preparing the hot-working method of multiple dimensioned multiconfiguration biphase titanium alloy tissue, this method is mainly biphase by controlling
Ratio, promotes the isometry initial alpha in thermal deformation process that β phase transformation occurs mutually, and ultimately forms the two of super-refinement
Phase lath structure.
Technical problem solved by the invention uses below scheme to realize.
A kind of hot-working method preparing multiple dimensioned multiconfiguration biphase titanium alloy tissue, comprises the following steps:
1) in the environment of noble gas argon, biphase titanium alloy to be processed is heated to 20-30 DEG C/s
900-960 DEG C, it is incubated 20-40s, can effectively control the α phase in two-way titanium alloy and β Phase Proportion, make biphase
Ratio reaches α phase and accounts for 60-70%, and intergranular β accounts for 30-40% mutually, carries out tissue for thermal deformation and prepares.
2) 10-15s is used-1Strain rate and the deflection of 50-60% carry out pyroplastic deformability's process, become
Shape carries out water-spraying control that cooling rate is 200-300 DEG C/s to room temperature after terminating, it is thus achieved that described biphase titanium alloy is thin
Change tissue.
The operation principle of the present invention:
It is incubated by Short Time Heating, can effectively control the α phase in biphase titanium alloy and β Phase Proportion, make two
Can jointly coordinate thermal deformation mutually.Using higher deformation velocity at two-phase section, bigger deflection carries out heat change
Shape, promotes isometry initial alpha that β phase transformation occurs mutually, and the final isometry α phase in version that obtains is that biphase lath is constituted
Thinning microstructure.Meanwhile, during shrend, in β lath, there is cooling phase-change, form finer α pin
Shape metastable phase.By above procedure, can finally obtain a kind of two-phase titanium with multiple dimensioned multiconfiguration structure and close
Gold thinning microstructure.
The present invention compared with prior art has the advantage that
1, in the present invention, for the composition of biphase titanium alloy without particular restriction, the scope of application is more extensive.
2, heat processing technique is simple, it is easy to control, it is not necessary to titanium alloy is carried out heating for multiple times, only need to be to two-phase
Titanium alloy carries out a hot-working and i.e. can reach the purpose of thinning microstructure, significantly reduces energy consumption, efficiency height.
3, the tissue size after refinement is less, and (two alternate exists to have multiple dimensioned and multiconfiguration structure
Multi-layer sheet structure and finer α acicular texture), follow-up machinability is good.
Accompanying drawing illustrates:
Fig. 1 is the EBSD figure of the multiple dimensioned multiconfiguration TC4 alloy of embodiment 1 preparation.
Fig. 2 is the EBSD figure of the multiple dimensioned multiconfiguration TC4 alloy of embodiment 2 preparation.
Detailed description of the invention:
Embodiment 1:
In the environment of with argon for protection gas, by TC4 biphase titanium alloy sheet material that thickness is 2mm with
25 DEG C/s is heated to 950 DEG C and is incubated 40s, makes two-phase proportion α phase account for 60%, and intergranular β accounts for 40% mutually, and
After be rapidly feeding milling train and roll, carry out rapidly the compression that drafts is 1mm, deformation strain speed
For 10-12s-1, thermal deformation terminates rear water-spraying control, by titanium alloy plate from 950 DEG C, with 200-250 DEG C/s
Cooling rate be cooled to room temperature.Fig. 1 is TC4 titanium alloy micro-organization chart after deformation.Measure α width of sheet about
It is 0.29 μm, finds that titanium alloy tissue thinning effect is preferable, there is multiple dimensioned multiconfiguration structure simultaneously.
Embodiment 2:
In the environment of with argon for protection gas, by TC4 biphase titanium alloy sheet material that thickness is 2mm with
30 DEG C/s is heated to 900 DEG C and is incubated 30s, makes two-phase proportion α phase account for 70%, and intergranular β accounts for 30% mutually, and
After be rapidly feeding milling train and roll, carry out rapidly the compression that drafts is 1mm, deformation strain speed
For 13-15s-1, thermal deformation terminates rear water-spraying control, by titanium alloy plate from 900 DEG C, with 250-300 DEG C/s
Cooling rate be cooled to room temperature.Fig. 2 is TC4 titanium alloy micro-organization chart after deformation.Measure α width of sheet about
It is 0.28 μm, finds that titanium alloy tissue thinning effect equally exists.
The ultimate principle of the present invention, principal character have more than been shown and described.It it is noted that the present invention is base
The structure refinement hot-working method proposed in titanium alloy phase conversion mechanism, the present invention is not limited by above-described embodiment
System, it is possible to use be different from the tissue thinning effect that the hot-working means of embodiment reach similar.
Claims (1)
1. the hot-working method preparing multiple dimensioned multiconfiguration biphase titanium alloy tissue, it is characterised in that: bag
Include following steps:
1) in the environment of noble gas argon, biphase titanium alloy to be processed is heated to 20-30 DEG C/s
900-960 DEG C, being incubated 20-40s, make two-phase proportion reach α phase and account for 60-70%, intergranular β accounts for 30-40% mutually,
Carry out tissue for thermal deformation to prepare；
2) 10-15s is used-1Strain rate and the deflection of 50-60% carry out pyroplastic deformability's process, become
Shape carries out water-spraying control that cooling rate is 200-300 DEG C/s to room temperature after terminating.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610513889.2A CN105951019B (en) | 2016-07-04 | 2016-07-04 | A kind of hot-working method for preparing multiple dimensioned multiconfiguration biphase titanium alloy tissue |
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|---|---|---|---|
| CN201610513889.2A CN105951019B (en) | 2016-07-04 | 2016-07-04 | A kind of hot-working method for preparing multiple dimensioned multiconfiguration biphase titanium alloy tissue |
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| Publication Number | Publication Date |
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| CN105951019A true CN105951019A (en) | 2016-09-21 |
| CN105951019B CN105951019B (en) | 2017-08-25 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62164860A (en) * | 1986-01-13 | 1987-07-21 | Kobe Steel Ltd | Manufacture of ti alloy material having superior rupture toughness and ductility |
| US5906692A (en) * | 1993-12-28 | 1999-05-25 | Alliedsignal Inc. | Process for producing forged α-2 based titanium aluminides having fine grained and orthorhombic transformed microstructure and articles made therefrom |
| CN1313798A (en) * | 1998-06-24 | 2001-09-19 | 通用电气公司 | Method for producing vehicle wheels |
| CN101403082A (en) * | 2008-09-11 | 2009-04-08 | 西北有色金属研究院 | Thermal treatment method for titanium alloy |
| EP2172576A1 (en) * | 1999-08-12 | 2010-04-07 | The Boeing Company | Titanium alloy having enhanced notch toughness and method of producing same |
| CN102510908A (en) * | 2009-09-25 | 2012-06-20 | 日本发条株式会社 | Nanocrystal titanium alloy and production method for same |
| CN104694864A (en) * | 2013-12-10 | 2015-06-10 | 陕西宏远航空锻造有限责任公司 | Improved forging method for martensitic alpha-beta two-phase titanium alloy |
-
2016
- 2016-07-04 CN CN201610513889.2A patent/CN105951019B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62164860A (en) * | 1986-01-13 | 1987-07-21 | Kobe Steel Ltd | Manufacture of ti alloy material having superior rupture toughness and ductility |
| US5906692A (en) * | 1993-12-28 | 1999-05-25 | Alliedsignal Inc. | Process for producing forged α-2 based titanium aluminides having fine grained and orthorhombic transformed microstructure and articles made therefrom |
| CN1313798A (en) * | 1998-06-24 | 2001-09-19 | 通用电气公司 | Method for producing vehicle wheels |
| EP2172576A1 (en) * | 1999-08-12 | 2010-04-07 | The Boeing Company | Titanium alloy having enhanced notch toughness and method of producing same |
| CN101403082A (en) * | 2008-09-11 | 2009-04-08 | 西北有色金属研究院 | Thermal treatment method for titanium alloy |
| CN102510908A (en) * | 2009-09-25 | 2012-06-20 | 日本发条株式会社 | Nanocrystal titanium alloy and production method for same |
| CN104694864A (en) * | 2013-12-10 | 2015-06-10 | 陕西宏远航空锻造有限责任公司 | Improved forging method for martensitic alpha-beta two-phase titanium alloy |
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