CN107214207A - A kind of processing method of high uniform beta titanium alloy bar - Google Patents
A kind of processing method of high uniform beta titanium alloy bar Download PDFInfo
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- CN107214207A CN107214207A CN201710362070.5A CN201710362070A CN107214207A CN 107214207 A CN107214207 A CN 107214207A CN 201710362070 A CN201710362070 A CN 201710362070A CN 107214207 A CN107214207 A CN 107214207A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
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Abstract
The invention discloses a kind of processing method of high uniform beta titanium alloy bar, the Ti15Mo titanium alloy forging stocks of vertical, horizontal even tissue are chosen, are heated below beta transus temperature, bar stock is forged to by rolling blank using a fire time multi-pass；Then rolling blank is heated below beta transus temperature, and carries out a fire time multistage hot deformation；Heating-straightening finally is carried out to it, polishes, that is, obtains the Ti15Mo titanium alloy rod bars of even tissue.The Ti15Mo titanium alloy rod bars prepared using the inventive method, it is more uniform than the bar horizontal organization that heating production is obtained on conventional β transition points, and crystal grain is tiny, meets biologic medical nontoxicity, the use requirement of low elastic modulus.
Description
Technical field
The invention belongs to titanium alloy material processing technique field, and in particular to a kind of high uniform beta titanium alloy bar plus
Work method.
Background technology
The titanium or titanium alloy such as Ti6Al4V and pure titanium is because with low modulus of elasticity, suitable intensity, superior is antifatigue
The features such as performance and biocompatibility, widely used as bio-medical material.With the raising of medical level, modulus of elasticity
Be 110GPa titanium alloys because the reason such as " stress shielding ", can not meet the requirements at the higher level of bone replacement products, and low elasticity mould
The beta titanium alloy such as Ti-Nb-Ta-Zr of amount bar is quickly developed.But Ti-Nb-Ta-Zr series titanium alloys are because containing substantial amounts of
The rare precious metals such as Nb, Ta, Zr, and melting is difficult, fails scale and carries out application.The minimum modulus of elasticity of Ti-Mo systems alloy is about
50GPa, is preferable implantation material.Traditional handicraft thinks, such alloy is needed in the processing of β phase regions, but deflection it is inadequate when, obtain
The uneven microstructure arrived.Therefore, exploitation modulus of elasticity is low, and composition, the Ti-15Mo titanium alloy rod bar products of even tissue are to China
The development of medical alloy material has great progradation.
The content of the invention
It is an object of the invention to provide a kind of processing method of high uniform beta titanium alloy bar, existing method is solved difficult
The problem of to stably produce fine microstructures, performance stable beta titanium alloy.
The technical solution adopted in the present invention is：A kind of processing method of high uniform beta titanium alloy bar, specifically according to
Lower step is implemented：
Step 1, middle base finish forge：
Choose under the Ti15Mo titanium alloy forging stocks of vertical, horizontal even tissue, air atmosphere, heated below beta transus temperature,
Fully insulation, is processed using a fire time multi-pass, is forged to rolling blank；
Step 2, bar stock is rolled：
Under the rolling blank that step 1 is obtained, air atmosphere, heated below beta transus temperature, fully insulation, using one
Fiery time multistage hot deformation is rolling to finished product bar stock；
Step 3, WIRE FINISHING LINE：
Bar after step 2 is rolled, through aligning grinding to finished size, that is, obtains the Ti15Mo titaniums of even tissue
Alloy bar material.
The features of the present invention is also resided in,
Heating-up temperature is that soaking time is at least 70min 50 DEG C~80 DEG C below beta transus temperature in step 1.
Pass deformation is 15%~30% in step 1, and cumulative deformation is 40%~72%.
Water cooling is carried out to blank after step 1 forging.
Heating-up temperature is 80 DEG C~110 DEG C below beta transus temperature, to be at least incubated 60min in step 2.
Pass deformation is 18%~35% in step 2, and cumulative deformation is 85%~96%.
Air cooling is carried out to bar stock after step 2 rolling.
Straightening temperature is 30 DEG C~50 DEG C below beta transus temperature in step 3.
The beneficial effects of the invention are as follows a kind of processing method of high uniform beta titanium alloy bar, by continuously in transformation temperature
Lower forging and rolling, control Dan Huoci large deformation, to improve the structural homogenity of bar.Prepared using the inventive method
Ti15Mo titanium alloy rod bars, the horizontal organization obtained than common process is uniform, and crystal grain is tiny, meet biologic medical bar without
The requirement of toxicity, low elastic modulus.
Brief description of the drawings
Fig. 1 is the horizontal organization low power figure for the Ti15Mo titanium alloy rod bars that the present invention is prepared；
Fig. 2 is the horizontal organization high power figure for the Ti15Mo titanium alloy rod bars that the present invention is prepared；
Fig. 3 is the horizontal organization low power figure for the Ti15Mo titanium alloy rod bars that the processing of conventional beta phase region is prepared；
Fig. 4 is the horizontal organization high power figure for the Ti15Mo titanium alloy rod bars that the processing of conventional beta phase region is prepared.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
A kind of processing method of high uniform beta titanium alloy bar of the present invention, specifically includes following steps：
Step 1, it is Φ 85~Φ 95mm to choose specification, and the Ti15Mo titanium alloy forging stocks of vertical, horizontal even tissue are placed in electricity
50 DEG C~80 DEG C heating below beta transus temperature in stove are hindered, the stove inside holding time is more than 70min, forged using 1 fire time multi-pass
Make, pass deformation is 15%~30%, cumulative deformation is 40%~72%, water cooling after forging.
Step 2, the bar stock obtained through step 1 finish forge is heated in resistance furnace, heating-up temperature selection beta transus temperature with
Lower 80 DEG C~110 DEG C, at least it is incubated 60min.Using 1 fire time multistage hot deformation, rolling pass deflection on open-train mill
For 18%~35%, cumulative deformation is 85%~96%, rolls rear air cooling；Bar stock is rolled 30 DEG C~50 below beta transus temperature
DEG C heating, aligning, after polishing i.e. obtain finished product bar.
Beta titanium alloy bar common process is thought, is processed more than beta transus temperature, and bar stock plasticity is good, resistance of deformation
It is small, be conducive to shaping, but in hot procedure, blank can quickly lose temperature, and it is to change temperature in β to cause material part deformation
Degree is accomplished below, and this can make material structure uneven.
The present invention controls the big changes of Dan Huoci by forging and rolling under transformation temperature to Ti15Mo titanium alloys forging stock is continuous
Shape, improves the structural homogenity of bar.Ti15Mo titanium alloy rod bars are prepared using the inventive method, obtained than common process
The horizontal organization arrived is uniform, and crystal grain is tiny, meets biologic medical bar nontoxicity, the requirement of low elastic modulus.
Fig. 1 is the horizontal organization low power figure of the Ti15Mo titanium alloy rod bars prepared using the inventive method, from figure
It can be seen that the macrostructure of the whole cross section of bar is uniform fuzzy crystalline substance, no crystal boundary and size difference.Fig. 2 is to use this hair
The horizontal organization high power figure for the Ti15Mo titanium alloy rod bars that bright method is prepared, the as can be seen from the figure horizontal organization of bar
Fine uniform, alpha+beta phase Dispersed precipitate.Fig. 3, Fig. 4 are that traditional handicraft processes obtained bar more than beta transus temperature respectively
Low, mirco structure figure.Heated more than beta transus temperature, in process, material constantly loses temperature, and part deformation is complete in β phase regions
Into part deformation is completed under beta transus temperature, can cause bar uneven microstructure.Compared with Fig. 1, Fig. 2, Fig. 3, Fig. 4 are equal
Even property is substantially poor.
Embodiment 1
Selection specification is Φ 85mm, and the Ti15Mo titanium alloy forging stocks of vertical, horizontal even tissue, actual measurement beta transus temperature is 750
℃.Forging stock is placed in resistance furnace to be heated at 670 DEG C, and the stove inside holding time is 70min, is forged using 1 fire time multi-pass to Φ
65mm (cumulative deformation is 40%), pass deformation is 15%~24%, immerses in flowing water and cools down at once after forging.It is cooled to room
The forging stock of temperature is heated in resistance furnace, and heating-up temperature is 640 DEG C, is incubated 80min.Using 1 fire time multistage hot deformation to Φ 25mm
(cumulative deformation is 85%), pass deformation is 18%~32%, rolls rear air cooling, and rolling bar stock is heated at 720 DEG C, aligning,
Finished product bar is obtained after polishing.
Embodiment 2
Selection specification is Φ 95mm, and the Ti15Mo titanium alloy forging stocks of vertical, horizontal even tissue, actual measurement beta transus temperature is 755
℃.Forging stock is placed in resistance furnace 690 DEG C of heating below beta transus temperature, and the stove inside holding time is 100min, many using 1 fire time
Passage is forged to Φ 50mm (cumulative deformation is 72%), and pass deformation is 19%~30%, is immersed at once in flowing water after forging
Cooling.The forging stock for being cooled to room temperature is heated in resistance furnace, and heating-up temperature is 660 DEG C, is incubated 60min.Using 1 fire time multi-pass
Φ 9.5mm (cumulative deformation is 96%) are hot-rolled down to, rolling pass deflection is 20%~35%, rolls rear air cooling, rolls bar stock
Heat, align at 720 DEG C, finished product bar is obtained after polishing.
Embodiment 3
Selection specification is Φ 85mm, and the Ti15Mo titanium alloy forging stocks of vertical, horizontal even tissue, actual measurement beta transus temperature is 750
℃.Forging stock is placed in resistance furnace in 700 DEG C of heating below beta transus temperature, and the stove inside holding time is 80min, many using 1 fire time
Passage is forged to Φ 52mm (cumulative deformation is 66%), and pass deformation is 17%~29%, is immersed at once in flowing water after forging
Cooling.The forging stock for being cooled to room temperature is heated in resistance furnace, and heating-up temperature is 670 DEG C, is incubated 70min.Using 1 fire time multi-pass
Φ 18mm (cumulative deformation is 88%) are hot-rolled down to, pass deformation is 20%~34%, roll rear air cooling, rolling bar stock is 700
Heat, align at DEG C, finished product bar is obtained after polishing.
Claims (8)
1. a kind of processing method of high uniform beta titanium alloy bar, it is characterised in that specifically include following steps：
Step 1, middle base finish forge：
Choose under the Ti15Mo titanium alloy forging stocks of vertical, horizontal even tissue, air atmosphere, heated below beta transus temperature, fully
Insulation, using a fire time multi-pass, is forged to rolling blank；
Step 2, bar stock is rolled：
Under the rolling blank that step 1 is obtained, air atmosphere, heated below beta transus temperature, fully insulation, using a fire
Multistage hot deformation, is machined to finished product bar stock；
Step 3, WIRE FINISHING LINE：
Bar after step 2 is rolled, through aligning grinding to finished size, that is, obtains the Ti15Mo titanium alloys of even tissue
Bar.
2. a kind of processing method of high uniform beta titanium alloy bar according to claim 1, it is characterised in that the step
Heating-up temperature is that soaking time is at least 70min 50 DEG C~80 DEG C below beta transus temperature in rapid 1.
3. a kind of processing method of high uniform beta titanium alloy bar according to claim 1, it is characterised in that the step
Pass deformation is 15%~30% in rapid 1, and cumulative deformation is 40%~72%.
4. a kind of processing method of high uniform beta titanium alloy bar according to claim 1, it is characterised in that the step
Water cooling is carried out to blank after rapid 1 forging.
5. a kind of processing method of high uniform beta titanium alloy bar according to claim 1, it is characterised in that the step
Heating-up temperature is 80 DEG C~110 DEG C below beta transus temperature, to be at least incubated 60min in rapid 2.
6. a kind of processing method of high uniform beta titanium alloy bar according to claim 1, it is characterised in that the step
Pass deformation is 18%~35% in rapid 2, and cumulative deformation is 85%~96%.
7. a kind of processing method of high uniform beta titanium alloy bar according to claim 1, it is characterised in that the step
Air cooling is carried out to bar stock after rapid 2 rolling.
8. a kind of processing method of high uniform beta titanium alloy bar according to claim 1, it is characterised in that the step
Straightening temperature is 30 DEG C~50 DEG C below beta transus temperature in rapid 3.
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| CN201710362070.5A CN107214207A (en) | 2017-05-22 | 2017-05-22 | A kind of processing method of high uniform beta titanium alloy bar |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107952794A (en) * | 2017-11-21 | 2018-04-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Single fiery milling method of TC4 titanium alloy cut deals |
| CN114669702A (en) * | 2022-04-02 | 2022-06-28 | 西部超导材料科技股份有限公司 | Preparation method of short-process Ti15Mo titanium alloy fine-grain rod blank |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107952794A (en) * | 2017-11-21 | 2018-04-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Single fiery milling method of TC4 titanium alloy cut deals |
| CN114669702A (en) * | 2022-04-02 | 2022-06-28 | 西部超导材料科技股份有限公司 | Preparation method of short-process Ti15Mo titanium alloy fine-grain rod blank |
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Application publication date: 20170929 |