CN107299235A - A kind of titanium alloy returns to material remelting method - Google Patents
A kind of titanium alloy returns to material remelting method Download PDFInfo
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- CN107299235A CN107299235A CN201710383687.5A CN201710383687A CN107299235A CN 107299235 A CN107299235 A CN 107299235A CN 201710383687 A CN201710383687 A CN 201710383687A CN 107299235 A CN107299235 A CN 107299235A
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
- C22B34/1295—Refining, melting, remelting, working up of titanium
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Abstract
Material remelting method is returned the invention discloses a kind of titanium alloy, material will be returned consutrode is made, and former ingot is obtained by 2 remeltings, and measures its chemical composition；Former ingot is added into obtain plug through two fire time forgings, machine；Mould is produced according to plug size；Using 0 grade of titanium sponge, intermediate alloy as virgin material, according to former ingot chemical composition, the composition proportion of new ingot to be prepared, virgin material is configured, virgin material is poured into the mold cavity equipped with mould, and be pressed into electrode block；Electrode block and plug group are welded into new consutrode, and carry out at least 3 times vacuum consumable remeltings and obtains new ingot；The former ingot for expecting remelting using titanium is returned matches the method for being smelted into new ingot again with virgin material, can effectively eliminate metallurgical imperfection that may be present in former ingot, improve the uniformity of chemical composition as plug.The quality of new ingot can reach the requirement of the high-end application field such as military project, medical treatment.
Description
【Technical field】
Material Technology For Remelting field is returned to the invention belongs to titanium alloy, more particularly to a kind of titanium alloy returns to material remelting method.
【Background technology】
Titanium has the excellent properties such as unique high specific strength, corrosion-resistant, in the neck such as Aero-Space, chemical industry, medical treatment, electronics
Domain is all widely used, and titanium or titanium alloy has been the valuable source for concerning national defence, the people's livelihood.Another reality is that titanium is because of it
Technique is limited, and recovery rate of iron is relatively low, typically can only achieve 50% or so.Therefore, the recycle and reuse to titanium waste material has
Very important social effect and economic benefit.
In large-scale production practice, the recovery of titanium waste material is frequently with vacuum consumable remelting process.Specific practice is：To profile chi
Very little comparison is regular, the return material (i.e. titanium alloy scrap) being easily processed, and edges of boards, long tubing, long bar, ingot casting rising head are rolled Ru cold and hot
Deng.The waste material of same alloy designations is bundled into consutrode with certain proportion, can be with by vacuum consumable smelting repeated revert-melt
Obtain ingot casting.The waste material addition of this method is and simple to operate up to 100%, and production cost is relatively low.
The ingot casting obtained using the method can be only applied to less demanding occasion, lack because wherein there may be some
Fall into：First, although it is the same trade mark to return to material, but may belong to different manufacturers, different heats, different times.Ground is not made any distinction between
There is inhomogeneities in simple fusion, the chemical composition of ingot casting.Second, the content of impurity element is uncontrollable, especially Fe, C, O etc.
Element, it is impossible to, can be with rational proportion as the new ingot of melting.Returning to material remelting can only detect afterwards, it is possible to exceeded.3rd,
Although the size for returning to material is more neat, because solder joint is more, stacks the process tied up and there may be loose place, will
Occurs the phenomenon of chip off-falling in melting.Chip off-falling region can not be carried over the abundant chemical combination of surrounding material, form microstructure segregation.
Therefore, how rationally to make good use of titanium and return to material, eliminate defect wherein that may be present, improve the quality of ingot casting, it is full
The regulation of the relevant criterions such as sufficient military project, medical treatment, is still the important research direction of a titanium application field.
【The content of the invention】
It is an object of the invention to provide a kind of titanium alloy return material remelting method, with solve exist remelting lack of homogeneity,
The problem of impurity content is uncontrollable, production cost is high.
The present invention uses following technical scheme, and a kind of titanium alloy returns to material remelting method, comprised the following steps：
Step 1, material will be returned it is made consutrode, and former ingot is obtained by 2 remeltings, and measures its chemical composition；
Step 2, by former ingot through two fire time forging, machines add to obtain plug；
Step 3, mould produced according to plug size；
Step 4, using 0 grade of titanium sponge, intermediate alloy as virgin material, matched somebody with somebody according to the composition of former ingot chemical composition, new ingot to be prepared
Than configuring virgin material compound, virgin material compound being poured into the mold cavity equipped with mould, and be pressed into electrode block；
Step 5, the electrode block drawn in step 4 and plug group be welded into new consutrode, and carry out at least 3 times vacuum
Consumable remelting obtains new ingot.
Further, step 1 specifically uses following methods：
Step 1.1, material will be returned cut into solderable size, through pickling, cleaning, the waste materials of same alloy designations is tied
Prick, consutrode, a diameter of 220mm of consutrode is made；
Step 1.2, the consutrode in step 1.1 is proceeded through to remelting twice obtain former ingot, and measure and draw former ingot
Chemical composition, the parameter of former ingot is Φ 380-600Kg.
Further, step 2 specifically uses following methods：
Step 2.1, by former ingot by two fire time forging, draw forging stock, design parameter is：
When one heat forging, 1050-1150 DEG C of heating-up temperature is incubated 3-3.5h, 380 → of deformation Φ 180, six after forging
Decile；
When two fire time forgings, 850-1000 DEG C of heating-up temperature is incubated 1.5-2h, deformation 180 → 100- 130,
And the difference of forging square billet diagonal cross section is not more than 10mm；
Step 2.2, the forging stock obtained in step 2.1 is processed into stock of square, is used as plug.
Further, the cross section of plug is square, and size is 90- 120, and the weight ratio of plug and new ingot is less than
Equal to 40%.
Further, mould is convex, and convex bottom is in the inner bottom surface of mold cavity, convex bottom length
Equal with the sole length of mold cavity, mold tabs portion width is equal with the length of side of plug, and mold tabs portion is highly plug
/ 2nd of the length of side.
Further, obtained electrode block is U-shaped in step 4, and the length of its U-shaped opening and the length of side of plug are equal.
Further, the process for new consutrode being drawn in step 5 is specially：The U-shaped opening of 2 electrode blocks is relative,
It is new consutrode by multiple new electrode block group welderings and open interior wraps up 1 plug, and carry out group weldering, obtains new electrode block；
The size of new electrode block is 220 × 300, and new electrode block substance is 45Kg.
Further, carry out suppressing new electrode block by 2000T hydraulic presses in step 4.
The beneficial effects of the invention are as follows：The former ingot for expecting remelting using titanium is returned melts again as plug with virgin material proportioning
The method of new ingot is smelt, metallurgical imperfection that may be present in former ingot can be effectively eliminated, the uniformity of chemical composition is improved.Newly
The quality of ingot can reach the requirement of the high-end application field such as military project, medical treatment, and it is more regular that the inventive method is suitable for appearance and size
Titanium or titanium alloy waste material recycling, especially in large-scale production, the high-volume unified to profile is returned at material concentration
The method of reason, this method has that ingot casting uniformity is good, impurity content is controllable, the more low feature of production cost.
【Brief description of the drawings】
Fig. 1 is the structural representation of mould in the present invention；
Fig. 2 is new electrode block cross-sectional view in the present invention.
【Embodiment】
The present invention is described in detail with reference to the accompanying drawings and detailed description.
Material remelting method is returned to the invention discloses a kind of titanium alloy, titanium first is returned into material (i.e. waste material) remelting is made original
Ingot, the forged, plug that machine addition is square is pressed into electrode together with virgin material, then the vacuum consumable carried out no less than 3 times melts
New ingot is prepared in refining.
The design of plug is the key of the present invention, according to the shape of electrode block, the relative position of plug and surrounding raw material
Distribution, reaches preferable uniformity；And be easy to assemble, weld.It is square by the Cross section Design of plug, makes itself and raw material around
Distribution is relatively uniform.Simultaneously in view of the uniformity of ingot casting composition, effective control of impurity content, it is close that electrode block is suppressed
Reality, the weld strength of consutrode, the overall factor returned in terms of the cost control that material is reclaimed returns to the part by weight of material
Control is within 40%.Specifically, as the stock of square of plug the minimum 90 of cross dimensions (i.e. the section length of side be 90mm
Stock of square, account for and weigh about 22%), be to the maximum 120 (i.e. the section length of side be 120mm stock of square, account for and weigh about 37%), just
Flexibly selected in production process.
Return and expect that the plug that former ingot is made is mixed with new raw material, then row remelting is that into the thinking main purpose of new ingot
The content of the uniformity of raising alloying component, effectively control impurity element, eliminates some metallurgy that may be present in former ingot as far as possible
Defect, it is final to realize the new ingot for meeting military project, medical applications.
Comprise the following steps that：
Step 1, material (i.e. waste material) will be returned it is made consutrode, and former ingot is obtained by 2 remeltings, and it is chemical to measure its
Composition；
Specifically use following methods：
Step 1.1, material will be returned cut into solderable size, through pickling, cleaning, the waste materials of same alloy designations is tied
Prick, consutrode, a diameter of 220mm of the consutrode is made；
Step 1.2, the consutrode in step 1.1 is proceeded through to remelting twice obtain former ingot, and measure and draw
The chemical composition of former ingot, the parameter of the former ingot is that (i.e. former ingot is that diameter of section is 380mm to Φ 380-600Kg, and weight is
600Kg)。
Titanium return material mainly for the more neat titanium pipe of appearance and size, titanium bar, cold and hot roll edges of boards, ingot casting rising head
Deng.Material will be returned in advance to cut into after solderable size (ingot casting rising head), pickling, cleaning, is closed using the method tied up by same
Waste material consutrode is made with certain proportion in the waste material of gold medal number, by vacuum consumable smelting remelting twice obtain former ingot (or
First starting-ingot).Design parameter is：Return to material and tie up a diameter of 220mm of consutrode, it is smelting twice, obtain Φ 380-600Kg
Former ingot.Former ingot chemical composition, the foundation that its result will be matched as virgin material described in sampling and testing.
Step 2, by former ingot through two fire time forging, machines add to obtain plug；It is 2000T forging presses from equipment.
Specifically, step 2.1, by former ingot by two fire time forging, draw forging stock, design parameter is：
When one heat forging, 1050-1150 DEG C of heating-up temperature is incubated 3-3.5h, 380 → of deformation Φ 180 (will
The circular blank that diameter of section is 380mm is forged to the stock of square that the section length of side is 180mm), can suitably it be tempered, six etc. after forging
Point；
When two fire time forgings, 850-1000 DEG C of heating-up temperature is incubated 1.5-2h, deformation 180 → 100- 130
(stock of square for being 180mm by the section length of side is forged to the stock of square that the section length of side is 100-130mm), can suitably return
Fire, notices that forging square billet must be smooth, and the difference of forging square billet diagonal cross section is not more than 10mm；
Step 2.2, the forging stock obtained in step 2.1 is processed into stock of square, is used as plug.
Using equipment such as milling machine, lathes, it (is the square of 90mm i.e. by the section length of side that forging stock is processed into 90- 120
Blank forging is the stock of square that the section length of side is 120mm) stock of square, the plug of follow-up consutrode will be used as.
Step 3, mould produced according to plug size；
As shown in figure 1, mould is convex, and convex bottom is arranged in the inner bottom surface of mold cavity, original to adapt to
Mold cavity, convex bottom length is equal with the sole length of mold cavity, mold tabs portion width B and plug length of side phase
Deng 1/2nd that, mold tabs portion height H is the plug length of side, i.e. H=1/2B.
Step 4, using 0 grade of titanium sponge, intermediate alloy as virgin material, matched somebody with somebody according to the composition of former ingot chemical composition, new ingot to be prepared
Than configuring virgin material compound, virgin material compound being poured into the mold cavity equipped with mould, and be pressed into electrode block.
According to the chemical composition of former ingot, (weight of plug accounts for the 20- of new electrode block weight to the proportioning of adjustment virgin material
40%).Virgin material is mixed, poured into mould, electrode block that pressing one-time is obtained is U-shaped, and the length and plug of U-shaped opening
The length of side is equal, it is necessary to which two electrode block butt welding, middle just to form new electrode block with plug welding.By the U-shaped of 2 electrode blocks
Opening is relative, and open interior wraps up 1 plug, and carry out group weldering, obtains new electrode block, is new by multiple new electrode block group welderings
Consutrode；The size of new electrode block is 220 × 300 (i.e. the section length of side is 220mm, and length is 300mm), new electrode block
Substance is 45Kg.And percentage by weight shared by plug is less than or equal to 40% in new electrode block.
As shown in Fig. 2 being the cross-sectional view of new electrode block, and it is 2000T hydraulic presses from equipment during compacting.
Step 5, the electrode block drawn in step 4 and plug group be welded into new consutrode, and carry out at least 3 times vacuum
Consumable remelting obtains new ingot.The new ingots of Φ 560-2160Kg are obtained through 3 vacuum consumable remeltings.Sampling and testing chemical composition.From
Equipment is 3T vacuum consumable smelting stoves.
The pure titaniums of the TA2 of embodiment 1 return to the preparation method of material remelting Φ 560-2160Kg ingot castings：Pure titanium returns to the main bag of material
Include TA1, TA2 tubing of higher level, bar, cold and hot roll edges of boards, ingot casting rising head etc..Material will be returned in advance cuts into solderable chi
After very little (ingot casting rising head), pickling, cleaning, Φ 220mm consutrode is bundled into, remelting is obtained twice by vacuum consumable smelting
Φ 380-600Kg (i.e. diameter of section is that 380mm, weight are 600Kg) former ingot.
The chemical composition of former ingot shows：The inhomogeneities of constituent content is very big, and O constituent contents are exceeded, C, N constituent content
It is higher.
The forging of former ingot：It is 2000T forging presses from equipment using two fire time forging technologies.
One fire：1050-1100 DEG C of heating-up temperature, is incubated 3-3.5h, and diameter of section (is by 380 → of deformation Φ 180
380mm circular blank is forged to the stock of square that the section length of side is 180mm).It is tempered once, six decile after forging.
Two fire：850-900 DEG C of heating-up temperature, is incubated 1.5-2h, and the section length of side (is by 180 → of deformation 130
180mm stock of square is forged to the stock of square that the section length of side is 130mm).Once, forging square billet profile is smooth for tempering, cuts
The difference of face diagonal is not more than 10mm.
The machine of forging stock adds：Using equipment such as milling machine, lathes, forging stock is processed into 120 stock of square (the i.e. section length of side
For 120mm stock of square).
The stock of square of 120 accounts for as the plug of consutrode and weighs about 37%.
TA2 name proportioning is Ti-0.25Fe-0.20O (wt%), and 0 grade of titanium sponge of raw material selection, technical pure Fe are followed closely,
Titanium dioxide.According to the chemical composition of former ingot and plug proportion, to control the impurity content of new ingot, virgin material proportioning according to
Ti-0.27Fe-0.16O (wt%) composition.
The compacting of electrode block：According to the size of plug, material pressing mould is processed.Virgin material is mixed, poured into mould, compacting electricity
Pole block, totally 96 pieces.Virgin material electrode block and the plug group of former ingot processing are welded into consutrode.The size of electrode block is 220 × 300
(i.e. the section length of side is that 220mm, length are 300mm).Substance is 45Kg (including plug), and totally 48 pieces, group weldering is for 4 from power consumption
Pole.It is 2000T hydraulic presses from equipment.
By vacuum consumable smelting 3 times, Φ 560-2160Kg ingot castings (being new ingot) are obtained.It is 3T vacuum from equipment
Consumable smelting stove.The chemical composition of new ingot shows：Constituent content has good uniformity, and O, C, N element content substantially drop
It is low, meet national standard.The ingot material does not find the internal phenomenon that there is tissue and component segregation during following process,.
The TA2 of table 1 returns to the chemical composition of material remelting
Embodiment 2 TC4 (Ti-6Al-4V) titanium alloy returns to the preparation method of material remelting Φ 560-2160Kg ingot castings：Return
The main TC4 bars including higher level of material, cold and hot roll edges of boards, ingot casting rising head etc..Material will be returned in advance cuts into solderable chi
After very little (ingot casting rising head), pickling, cleaning, Φ 220mm consutrode is bundled into, remelting is obtained twice by vacuum consumable smelting
Φ 380-600Kg former ingot.
The chemical composition of former ingot shows：The inhomogeneities of constituent content is very big, and O constituent contents are exceeded.
The forging of former ingot：It is 2000T forging presses from equipment using two fire time forging technologies.
One fire：1100-1150 DEG C of heating-up temperature, is incubated 3-3.5h, and diameter of section (is by 380 → of deformation Φ 180
380mm circular blank is forged to the stock of square that the section length of side is 180mm).It is tempered once, six decile after forging.
Two fire：950-1000 DEG C of heating-up temperature, is incubated 1.5-2h, and the section length of side (is by 180 → of deformation 100
180mm stock of square is forged to the stock of square that the section length of side is 100mm).Once, forging square billet profile is smooth for tempering, cuts
The difference of face diagonal is not more than 10mm.
The machine of forging stock adds：Using equipment such as milling machine, lathes, forging stock is processed into the side of 90 (the section length of side is 90mm)
Shape blank.
The stock of square of 90 accounts for as the plug of consutrode and weighs about 22%.
TC4 name proportioning be Ti-6.2Al-4.0V-0.15Fe-0.16O (wt%), 0 grade of titanium sponge of raw material selection,
Technical pure Fe is followed closely, AlV55 intermediate alloys, technical pure aluminium shot, titanium dioxide etc..According to former ingot chemical composition and plug proportion,
Virgin material is matched according to Ti-6.18Al-3.96V-0.12Fe-0.14O (wt%), it is therefore an objective to control containing for new ingot impurity element
Amount.
The compacting of electrode block：According to the size of plug, material pressing mould is processed.Virgin material is mixed, poured into mould, compacting electricity
Pole block, totally 96 pieces.Virgin material electrode block and the plug group of former ingot processing are welded into consutrode.The size of electrode block is 220 × 300
(i.e. the section length of side is that 220mm, length are 300mm).Substance is 45Kg (including plug), and totally 48 pieces, group weldering is for 4 from power consumption
Pole.It is 2000T hydraulic presses from equipment.
By vacuum consumable smelting 3 times, Φ 560-2160Kg ingot castings (i.e. new ingot) are obtained.From equipment be 3T vacuum from
Consume smelting furnace.The chemical composition of new ingot shows：The uniformity of alloying element content preferably, effectively controlled by the content of impurity element
Make, the constituent content such as Fe, O, C, N is substantially reduced, reach standard requirement.The ingot material is not found during following process
There is the phenomenon of tissue and component segregation in inside.
The TC4 of table 2 returns to the chemical composition of material remelting
Claims (8)
1. a kind of titanium alloy returns to material remelting method, it is characterised in that comprise the following steps：
Step 1, material will be returned it is made consutrode, and former ingot is obtained by 2 remeltings, and measures its chemical composition；
Step 2, by the former ingot through two fire time forging, machines add to obtain plug；
Step 3, mould produced according to the plug size；
Step 4, using 0 grade of titanium sponge, intermediate alloy as virgin material, matched somebody with somebody according to the composition of the former ingot chemical composition, new ingot to be prepared
Than configuring virgin material compound, virgin material compound being poured into the mold cavity equipped with mould, and be pressed into electrode block；
Step 5, the electrode block drawn in step 4 and plug group be welded into new consutrode, and carry out at least 3 times vacuum consumable weights
It is molten to obtain new ingot.
2. titanium alloy as claimed in claim 1 returns to material remelting method, it is characterised in that step 1 specifically uses following methods：
Step 1.1, by return material cut into solderable size, through pickling, cleaning, the waste material of same alloy designations is tied up, make
Into consutrode, a diameter of 220mm of the consutrode；
Step 1.2, the consutrode in step 1.1 is proceeded through to remelting twice obtain former ingot, and measure and draw former ingot
Chemical composition, the parameter of the former ingot is Φ 380-600Kg.
3. titanium alloy as claimed in claim 1 returns to material remelting method, it is characterised in that step 2 specifically uses following methods：
Step 2.1, by the former ingot by two fire time forging, draw forging stock, design parameter is：
When one heat forging, 1050-1150 DEG C of heating-up temperature is incubated 3-3.5h, 380 → of deformation Φ 180, six etc. after forging
Point；
When two fire time forgings, 850-1000 DEG C of heating-up temperature is incubated 1.5-2h, deformation 180 → 100- 130, and forging
Make the difference no more than 10mm of square billet diagonal cross section；
Step 2.2, the forging stock obtained in step 2.1 is processed into stock of square, is used as plug.
4. the titanium alloy as described in claim 1-3 is any returns to material remelting method, it is characterised in that the plug cross section is
It is square, and size is 90- 120, the weight ratio of the plug and new ingot is less than or equal to 40%.
5. the titanium alloy as described in claim 1-3 is any returns to material remelting method, it is characterised in that the mould is convex,
And the convex bottom is arranged in the inner bottom surface of mold cavity, the convex bottom length and the bottom surface of the mold cavity
Equal length, mold tabs portion width is equal with the length of side of the plug, and the mold tabs portion is highly the plug
/ 2nd of the length of side.
6. titanium alloy as claimed in claim 5 returns to material remelting method, it is characterised in that obtained electrode block is U in step 4
Shape, and the length of its U-shaped opening is equal with the length of side of the plug.
7. titanium alloy as claimed in claim 1 returns to material remelting method, it is characterised in that new consutrode is drawn in step 5
Process be specially：The U-shaped opening of 2 electrode blocks is relative, and open interior wraps up 1 plug, and carry out group weldering, obtains
It is new consutrode by multiple new electrode block group welderings to new electrode block；
The size of the new electrode block is 220 × 300, and the new electrode block substance is 45Kg.
8. titanium alloy as claimed in claim 1 returns to material remelting method, it is characterised in that pass through 2000T hydraulic presses in step 4
New electrode block is suppressed in progress.
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Cited By (6)
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| CN108359808A (en) * | 2018-04-30 | 2018-08-03 | 西部钛业有限责任公司 | The method that big specification TC4 titan alloy casting ingots are prepared using high proportion titanium defective material |
| CN108359807A (en) * | 2018-04-03 | 2018-08-03 | 天津赛瑞机器设备有限公司 | The process that the waste and old plugs of H13 recycle |
| CN112853103A (en) * | 2020-12-30 | 2021-05-28 | 西安西工大超晶科技发展有限责任公司 | Titanium alloy recovery method |
| CN113025831A (en) * | 2021-02-26 | 2021-06-25 | 西安西工大超晶科技发展有限责任公司 | Treatment method for reducing oxygen content of titanium alloy ingot |
| CN113512654A (en) * | 2021-06-02 | 2021-10-19 | 北京工业大学 | A method for short-process recycling of returned materials |
| CN114908223A (en) * | 2022-05-31 | 2022-08-16 | 鞍钢股份有限公司 | A converter smelting method utilizing high titanium return material |
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| CN113512654A (en) * | 2021-06-02 | 2021-10-19 | 北京工业大学 | A method for short-process recycling of returned materials |
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