CN107217164A - A kind of preparation method of titanium alloy large-sized homogeneous ingot casting - Google Patents
A kind of preparation method of titanium alloy large-sized homogeneous ingot casting Download PDFInfo
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- CN107217164A CN107217164A CN201710383891.7A CN201710383891A CN107217164A CN 107217164 A CN107217164 A CN 107217164A CN 201710383891 A CN201710383891 A CN 201710383891A CN 107217164 A CN107217164 A CN 107217164A
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- titanium sponge
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/052—Metallic powder characterised by the size or surface area of the particles characterised by a mixture of particles of different sizes or by the particle size distribution
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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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Abstract
The invention discloses a kind of preparation method of titanium alloy large-sized homogeneous ingot casting, used in this method and dismountable auxiliary stand is placed with mold cavity, mold cavity, mold cavity is divided into N number of lattice by auxiliary stand to be kept off；Titanium sponge is divided into bulky grain titanium sponge and little particle titanium sponge according to granular size；Bulky grain titanium sponge, little particle titanium sponge are subjected to weighing with middle material respectively, and N parts of mixed materials will be drawn, is poured into respectively in N number of lattice gear, and the mixed material met in two neighboring lattice gear includes bulky grain titanium sponge and little particle titanium sponge respectively；Auxiliary stand is taken out from mold cavity；Mixed material in mold cavity is disposably pressed into by big substance electrode block using the vertical compacting of short stroke；Repeat the above steps, obtain multiple big substance electrode blocks, group weldering is consutrode, and consutrode is carried out into the titanium alloy large-sized homogeneous ingot casting that 23 vacuum consumable smeltings are had good uniformity；The problem of present invention solves the component segregation for being doomed middle appearance.
Description
【Technical field】
The invention belongs to titanium alloy smelting method and technology field, and in particular to a kind of preparation of titanium alloy large-sized homogeneous ingot casting
Method.
【Background technology】
In large-scale production practice, the preparation of titanium and titanium alloy ingot casting is frequently with vacuum consumable remelting process.Vacuum consumable melts
Refining is easy to operate, can effectively control the content of impurity element, the uniform large-sized casting ingot of composition can be obtained by repeated revert-melt.
The necessary previously prepared consutrode of vacuum consumable smelting, the corresponding alloy electrode block substance of large-sized casting ingot is also larger,
Mechanical mixture is carried out to titanium and its alloying element frequently with batch mixer.The preparation of such as conventional Titanium alloy Ti-6Al-4V electrode block：
Titanium sponge, intermediate alloy, titanium dioxide etc. are poured into batch mixer together, after rotation certain time, compound is poured into mould,
It is pressed into titanium alloy electrode block.
In mixing process, there is the potential risk of material uneven distribution, this is mainly by feedstock Particle size and density
Caused by difference.Due to the granular size of conventional sponges titanium, in 2-25.4mm.Of alloy material (such as aluminum-vanadium alloy)
Smaller, the generally less than 8mm of grain, and part is in powdered.After batch mixer is mixed, it may appear that smaller particle and larger particles phase
To aggregation, the phenomenon of regional allocations.Load mould, compressing process, do not change this point largely
Cloth trend.Bad is contained comprising more little particle titanium sponge and intermediate alloy material, bulky grain in region in little particle region
There are larger particles titanium sponge and less intermediate alloy material.Possesses the electrode block group postwelding of such feature, by multiple vacuum certainly
Melting is consumed, can not the original area distribution of radical change.It is envisioned that in certain part of ingot casting, will there is two kinds of differences
The area distribution of component, that is, form component segregation.The region of original little particle aggregation, titanium elements content is relatively low, alloying member
Cellulose content is higher, and the transformation temperature of alloy is relatively low.The region titanium elements content of original bulky grain aggregation is higher, alloying element content
Relatively low, the transformation temperature of alloy is higher.This component segregation will not be eliminated in follow-up hot-working, will be genetic to always titanium into
Product, cause tissue unqualified, product rejection.
2-3 tons of large-sized casting ingot is prepared, the weight of single electrode block is more than 100Kg.If directly disposable compacting, above-mentioned
Often there is the phenomenon of component segregation in the inhomogeneities increase of batch mixing, actual production process.Therefore, the electrode of large-sized casting ingot
Block, is suppressed frequently with piecemeal, the method for organizing weldering.But such operation is only reduction of the risk of component segregation appearance, can not
Theoretically eliminate the defect of mixing process size particles regional allocations.
【The content of the invention】
It is an object of the invention to provide a kind of preparation method of titanium alloy large-sized homogeneous ingot casting, to solve what is occurred in ingot casting
The problem of component segregation.
The present invention is used to be used in following technical scheme, a kind of preparation method of titanium alloy large-sized homogeneous ingot casting, this method
Dismountable auxiliary stand is placed with mold cavity, mold cavity, auxiliary stand is used to mold cavity inner space being divided into
N number of lattice gear of horizontal arrangement, wherein N >=16 are positive integer；
The preparation method specifically includes following steps：
Step 1, titanium sponge according to granular size is divided into bulky grain titanium sponge and little particle titanium sponge；
Step 2, bulky grain titanium sponge, little particle titanium sponge be subjected to weighing with middle material respectively, and N parts of mixing will be drawn
Raw material, is poured into N number of lattice gear respectively, and the mixed material met in two neighboring lattice gear includes bulky grain titanium sponge and small respectively
Participated sponge titanium；
Step 3, by auxiliary stand from mold cavity take out；
Mixed material in mold cavity, is disposably pressed into greatly by step 4, startup press using the vertical compacting of short stroke
Substance electrode block；
Step 5, step 1 is repeated to step 4, obtain multiple big substance electrode blocks, group weldering is consutrode, and will be from
Power pole carries out the titanium alloy large-sized homogeneous ingot casting that 2-3 vacuum consumable smelting is had good uniformity.
Further, titanium sponge is 0 grade of titanium sponge, and the particle diameter of bulky grain titanium sponge is more than 12.7mm, little particle titanium sponge
Particle diameter be less than or equal to 12.7mm.
Further, the long edge size of each lattice gear in the horizontal direction is 60-120mm.
Further, auxiliary stand includes the support plate of multiple vertical and settings that intersect, and the material of each support plate is
Pure titanium or Titanium alloy Ti-6Al-4V.
Further, the vertical section of each support plate of auxiliary stand is：Top is rectangle, and the thickness of bottom gradually subtracts
It is small wedge shaped.
Further, the length on the electrode block obtained in step 4, its pressing direction is less than the length on vertical pressing direction
Degree.
Further, electrode block substance is 100-180Kg in step 4.
Further, press selects 3500T hydraulic presses.
The beneficial effects of the invention are as follows：On the premise of titanium sponge grade and cost is not improved, by titanium sponge prescreening,
Bulky grain is mixed with intermediate alloy material respectively with little particle.During electrode pressing, it is pre-placed using auxiliary stand in mould type
In chamber, whole mold cavity volume is divided into several parts, and by the alternate placement of size particles, its is distributed uniform sequentially, then will
It is unified compressing after support takes out.The consutrode of such cloth, after the completion of electrode block compacting, group weldering is consutrode, just
Follow-up vacuum consumable smelting can be carried out.In fusion process, the region of size particles effectively can be fused in phase counterdiffusion, no
Component segregation occurs.The present invention is distributed alternately by dividing and rule, unified compacting, improves the interior quality of ingot casting.
【Brief description of the drawings】
Fig. 1 shows the structure that mold cavity is divided into 16 parts and support plate cross section for auxiliary stand in the embodiment of the present invention
It is intended to.
【Embodiment】
The present invention is described in detail with reference to the accompanying drawings and detailed description.
The invention discloses a kind of preparation method of titanium alloy large-sized homogeneous ingot casting, this method is particularly suitable for use in vacuum consumable
Melting prepares 2-3 ton large-scale titan alloy casting ingots.As shown in figure 1, using mold cavity in this method, put in advance in mold cavity
Dismountable auxiliary stand is equipped with, auxiliary stand is used to keep off N number of lattice that mold cavity inner space is divided into horizontal arrangement, wherein
N >=16 are positive integer.
Auxiliary stand can be according to conditions such as the substance of electrode block, the specific requirement of dispensing element, the specifications of mold cavity
The different structure of the design number different with division.In addition, the long edge size of each lattice gear in the horizontal direction is 60-120mm.
In order to adapt to the machine condition of titanium, auxiliary stand includes the support plate of multiple vertical and settings that intersect, each
The material of support plate is pure titanium or conventional Titanium alloy Ti-6Al-4V, is taken out for convenience, each support plate of auxiliary stand it is vertical
Section is that top is rectangle for the vertical section of each support plate of plagiohedral wide at the top and narrow at the bottom, i.e. auxiliary stand, and the thickness of bottom
Degree is gradually reduced wedge shaped.
The preparation method specifically includes following steps：
Step 1, titanium sponge is sieved according to granular size in advance, sieved as bulky grain titanium sponge and little particle sponge
Titanium；Titanium sponge selection is 0 grade of titanium sponge, and bulky grain titanium sponge is that particle diameter is more than 12.7mm, and the particle diameter of little particle titanium sponge is less than
Equal to 12.7mm.
Step 2, bulky grain titanium sponge and little particle titanium sponge carry out to weighing with middle material respectively, and by the N drawn parts
Mixed material, is poured into N number of lattice gear respectively, and the mixed material met in two neighboring lattice gear includes bulky grain titanium sponge respectively
With little particle titanium sponge；
According to the proportioning of titanium alloy and the segmentation number of auxiliary stand, weighing, batch mixing, are poured into corresponding lattice gear respectively,
Particularly large and small participated sponge titanium is mixed with intermediate alloy material respectively, is distributed alternately, as shown in figure 1, criss-cross auxiliary branch anyhow
Mold cavity is divided into 16 parts by frame, then needs weighing, batch mixing 16 times, and wherein "+", "-" represents size particles titanium sponge
Mix, distribute alternately in mold cavity with intermediate alloy material respectively.
Step 3, auxiliary stand is loosened, in not influenceing lattice to keep off in the case of original cloth, by auxiliary stand from mould type
Chamber takes out.
Mixed material in mold cavity, is disposably pressed into greatly by step 4, startup press using the vertical compacting of short stroke
Substance electrode block；The electrode block substance that this method is pressed into is more than or equal to 100Kg, and electrode block substance preferably is 100-180Kg.
The vertical compacting of short stroke refers to that the height that press top mold frame is lifted is as far as possible small, shortens the stroke of press.Its intension is
The size for referring to vertical pressing direction is the block-shaped minimum dimension of electrode, and the height of obtained electrode block is less than diameter, that is, obtained
Electrode block pressing direction on length be less than the vertical pressing direction of electrode block on length, be so conducive to electrode block to be compacted
The uniformity of density, is 3500T hydraulic presses from equipment.
Step 5, step 1 is repeated to step 4, obtain multiple big substance electrode blocks, and it is consutrode to organize weldering, and according to
It is secondary that each consutrode is subjected to the titanium alloy large-sized homogeneous ingot casting that 2-3 vacuum consumable smelting is had good uniformity.
The pure titanium Φ 620-2880Kg ingot casting method of smelting of embodiment 1TA2：0 grade of titanium sponge of raw material selection, technical pure Fe
Nail, titanium dioxide.Alloy proportion is according to composition Ti-0.25Fe-0.20O (wt%).Titanium sponge is sieved in advance, with 12.7mm
Boundary is simply divided into size two kinds of particles.
Criss-cross auxiliary stand is pre-placed in Φ 460 mold cavity, die cavity is divided into 16 parts.10Kg is pressed respectively
Weight batching, weighing 16 times, pour into 16 lattice shelves.Especially by the alternate placement of size particles compound.Loosen and take out support
Afterwards, the Φ 460-160Kg pure Ti electrode blocks of TA2 are disposably pressed into.The big substance electrode block thickness about 300mm being pressed into.
18 electrode blocks are prepared altogether, and group weldering is 2 consutrodes.It is follow-up to pass through vacuum consumable smelting 2 times, obtain Φ 620-
2880Kg ingot castings.Ingot casting top, middle part, the testing result of bottom Fe constituent contents are 0.25%, 0.23%, 0.24%.O elements
The testing result of content is 0.20%, 0.18%, 0.21%.The ingot material does not find that inside is deposited during following process,
In the phenomenon of tissue and component segregation.
Embodiment 2TC4 (Ti-6Al-4V) titanium alloy Φ 620-3000Kg ingot casting method of smelting：0 grade of sponge of raw material selection
Titanium, AlV55 intermediate alloys, technical pure aluminium shot, alloy proportion is according to Ti-6.2%Al-4.2%V (wt%).In advance by titanium sponge
Sieved, size two kinds of particles is simply divided into 12.7mm boundary.
Criss-cross auxiliary stand is pre-placed in Φ 380 mold cavity, die cavity is divided into 16 points.Press respectively
6.25Kg weight batching, weighing 16 times, are poured into 16 lattice shelves.Especially by the alternate placement of size particles compound.Pine
It is dynamic to take out after support, disposably it is pressed into Φ 380-100Kg TC4 titanium alloy electrode blocks.The big substance electrode block thickness being pressed into
About 300mm.
30 electrode blocks are prepared altogether, and group weldering is 4 consutrodes.It is follow-up to pass through vacuum consumable smelting 3 times, obtain Φ 620-
3000Kg ingot castings.Ingot casting top, middle part, the testing result of bottom constituent content are：Al%=6.25%, 6.30%, 6.26%；
V%=4.20%, 4.25%, 4.24%；Fe%=0.15%, 0.13%, 0.14%；O%=0.14%, 0.13%,
0.14%.The ingot material does not find the internal phenomenon that there is tissue and component segregation during following process,.
Binder auxiliary stand can be according to the substance of electrode block, the requirement of raw material and dispensing, the specification of mold cavity
The structure different etc. condition design, it is not limited to the structure type mentioned in the present invention.
Claims (8)
1. a kind of preparation method of titanium alloy large-sized homogeneous ingot casting, it is characterised in that mold cavity, mould type are used in this method
Intracavitary is placed with dismountable auxiliary stand, and the auxiliary stand is used for the N that mold cavity inner space is divided into horizontal arrangement
Individual lattice gear, wherein N >=16 are positive integer；
The preparation method specifically includes following steps：
Step 1, titanium sponge according to granular size is divided into bulky grain titanium sponge and little particle titanium sponge；
Step 2, by bulky grain titanium sponge, little particle titanium sponge respectively with middle material carry out weighing, and will draw N part mixing original
Material, is poured into N number of lattice gear respectively, and the mixed material met in two neighboring lattice gear includes bulky grain titanium sponge and small respectively
Grain titanium sponge；
Step 3, by the auxiliary stand from mold cavity take out；
Step 4, startup press, big substance is disposably pressed into using the vertical compacting of short stroke by the mixed material in mold cavity
Electrode block；
Step 5, repeat step 1 to step 4, obtain multiple big substance electrode blocks, group weldering is consutrode, and will it is described from
Power pole carries out the titanium alloy large-sized homogeneous ingot casting that 2-3 vacuum consumable smelting is had good uniformity.
2. the preparation method of titanium alloy large-sized homogeneous ingot casting as claimed in claim 1, it is characterised in that the titanium sponge is 0
Level titanium sponge, the particle diameter of the bulky grain titanium sponge is more than 12.7mm, and the particle diameter of the little particle titanium sponge is less than or equal to
12.7mm。
3. the preparation method of titanium alloy large-sized homogeneous ingot casting as claimed in claim 1, it is characterised in that each lattice gear exists
Long edge size in horizontal direction is 60-120mm.
4. the preparation method of the titanium alloy large-sized homogeneous ingot casting as described in claim 1-3 is any, it is characterised in that the auxiliary
Support includes the support plate of multiple vertical and settings that intersect, and the material of each support plate is pure titanium or titanium alloy T i-
6Al-4V。
5. the preparation method of titanium alloy large-sized homogeneous ingot casting as claimed in claim 4, it is characterised in that the auxiliary stand
Each the vertical section of support plate is：Top is rectangle, and bottom thickness be gradually reduced it is wedge shaped.
6. the preparation method of the titanium alloy large-sized homogeneous ingot casting as described in claim 1-3 is any, it is characterised in that in step 4
Length on obtained electrode block, its pressing direction is less than the length on vertical pressing direction.
7. the preparation method of titanium alloy large-sized casting ingot as claimed in claim 1 or 2, it is characterised in that electrode described in step 4
Block substance is 100-180Kg.
8. the preparation method of titanium alloy large-sized casting ingot as claimed in claim 1 or 2, it is characterised in that the press is selected
3500T hydraulic presses.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109055793A (en) * | 2018-10-26 | 2018-12-21 | 成都先进金属材料产业技术研究院有限公司 | A kind of production method of TA18 titan alloy casting ingot |
| CN117324525A (en) * | 2023-12-01 | 2024-01-02 | 苏州森锋医疗器械有限公司 | Intramedullary nail and preparation method thereof |
| CN117344177A (en) * | 2023-12-01 | 2024-01-05 | 北京中科万德创新科技有限公司 | High-shear-strength bone needle capable of inhibiting drug-resistant bacterial biomembrane and preparation method thereof |
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| CN106119606A (en) * | 2016-08-26 | 2016-11-16 | 西部超导材料科技股份有限公司 | A kind of WSTi45561 superhigh intensity titanium alloy and preparation method thereof |
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| US20030132108A1 (en) * | 2002-01-15 | 2003-07-17 | Shoichi Takahashi | Process for producing titanium material for target, titanium material for target, and sputtering target using the same |
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| CN117324525A (en) * | 2023-12-01 | 2024-01-02 | 苏州森锋医疗器械有限公司 | Intramedullary nail and preparation method thereof |
| CN117344177A (en) * | 2023-12-01 | 2024-01-05 | 北京中科万德创新科技有限公司 | High-shear-strength bone needle capable of inhibiting drug-resistant bacterial biomembrane and preparation method thereof |
| CN117324525B (en) * | 2023-12-01 | 2024-02-13 | 苏州森锋医疗器械有限公司 | Intramedullary nail and preparation method thereof |
| CN117344177B (en) * | 2023-12-01 | 2024-03-22 | 苏州森锋医疗器械有限公司 | High-shear-strength bone needle capable of inhibiting drug-resistant bacterial biomembrane and preparation method thereof |
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