CN107746982A - Consutrode and preparation method thereof and the application in titan alloy casting ingot melting shaping - Google Patents
Consutrode and preparation method thereof and the application in titan alloy casting ingot melting shaping Download PDFInfo
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- CN107746982A CN107746982A CN201711107805.6A CN201711107805A CN107746982A CN 107746982 A CN107746982 A CN 107746982A CN 201711107805 A CN201711107805 A CN 201711107805A CN 107746982 A CN107746982 A CN 107746982A
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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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- 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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/20—Arc remelting
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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
Abstract
A kind of consutrode and preparation method thereof and the application in titan alloy casting ingot melting shaping, the consutrode include the consutrode main body provided with through hole vertically and the inverse segregation plug being inserted in through hole；The species of each element is identical with the species of each element in consutrode main body in inverse segregation plug；When containing normal segregation element and/or negative segregation element in consutrode main body, weight content of the normal segregation element of the same race in inverse segregation plug is less than its weight content in consutrode main body, and weight content of the negative segregation element of the same race in inverse segregation plug is higher than its weight content in consutrode main body.The consutrode has suited Rule of Segregation of the segregation element in process of setting, creatively solves the problems, such as consutrode caused element segregation in the condensation process of molten bath, so as to improve the quality stability of alloy cast ingot.
Description
Technical field
The present invention relates to alloy casting technology field, is closed more particularly to a kind of consutrode and preparation method thereof and in titanium
Application in golden ingot casting melting shaping.
Background technology
With the alloy materials such as titanium alloy the numerous areas such as Aeronautics and Astronautics, ocean, chemical industry and medical treatment application increasingly
Extensively, it is more and more concerned element segregation seriously causes alloy material streaking in terms of alloy casting the problem of.For example,
Titanium alloy is more by the way of vacuum consumable electric arc (English abbreviation VAR) melting by titanium sponge and various intermediate alloys or simple substance member
The production of cellulosic material Melting And Solidification turns into ingot casting, because VAR fusion process has pole to the stability of crucible air-tightness and molten bath in itself
High requirement, be difficult to control the uniformity of alloying component by way of stirring in actual fusion process, thus titanium sponge and
Various alloying elements, which will pass through the preparation of the flows such as batch mixing, compacting, welding, turns into the more uniform consutrode of composition, then carries out
VAR meltings, but this method still can not overcome the caused element segregation problem in the condensation process of molten bath, produce obtained conjunction
Golden ingot casting quality is still unstable.
The content of the invention
Based on this, it is necessary to provide a kind of consutrode that can improve alloy cast ingot quality stability and preparation method thereof
With the application in titan alloy casting ingot melting shaping.
A kind of consutrode, including be provided with the consutrode main body of through hole vertically and be inserted in reverse-biased in the through hole
Analyse plug；The species of each element is identical with the species of each element in the consutrode main body in the inverse segregation plug；Work as institute
State when containing normal segregation element and/or negative segregation element in consutrode main body, normal segregation element of the same race is in the inverse segregation core
Weight content in rod is less than its weight content in the consutrode main body, and negative segregation element of the same race is in the inverse segregation
Weight content in plug is higher than its weight content in the consutrode main body.
Applicants have discovered that the temperature of the core of consutrode is higher than the side of consutrode in the condensation process of molten bath
Edge branch causes normal segregation element to be assembled from the edge of consutrode to core.The method of conventional reduction segregation is to expand
Heat radiation speed of the big thermograde to improve setting rate or improve mold.And the application creatively sets consutrode
Count into consutrode main body and the combining structure of inverse segregation plug.The consutrode has suited segregation element in process of setting
Rule of Segregation, creatively solves the problems, such as consutrode caused element segregation in the condensation process of molten bath, so as to improve
The quality stability of alloy cast ingot；Break simultaneously and added manually containing segregation member during consumable electrode melting
Traditional inverse segregation distributing mode of the alloy bag of element, avoiding alloy bag and dropping causes in molten bath molten bath solution is unstable to influence alloy
The problem of ingot casting quality, the step of preparing the alloy bag containing segregation element and artificial cloth is also eliminated, it also avoid in addition
The problem of artificial cloth inequality precision is difficult to control and production efficiency is low, so as to simplify cloth operation, improves production effect
Rate.
In one of the embodiments, the length of the inverse segregation plug is more than the length of the consutrode body；
The inverse segregation plug of the consutrode and consutrode main body flush at one end in the melting starting the arc with
The furnace bottom of vaccum consumable electrode electric arc furnace is oppositely arranged, and the consutrode body is exposed in inverse segregation plug described in the other end
For fixation.
In one of the embodiments, when containing normal segregation element and/or negative segregation element in the consutrode main body
When, from one end that the consutrode flushes to the other end, the weight of normal segregation element of the same race contains in the consutrode main body
Amount gradually reduces, and the weight content of negative segregation element of the same race gradually increases in the consutrode main body.
In one of the embodiments, the consutrode main body is bonded successively by multiple electrode module units provided with through hole
And it is welded；And when containing normal segregation element and/or negative segregation element in the consutrode main body, from described from power consumption
Weight content corresponding to the normal segregation element of the same race that one end that pole flushes is contained to the other end, multiple electrode module units is gradual
Reduce, weight content corresponding to the negative segregation element of the same race that multiple electrode module units contain gradually increases.
In one of the embodiments, the electrode module unit includes multiple sub-electrode blocks, multiple sub-electrode block edges
Circumferentially it is spliced to form the electrode module unit.
In one of the embodiments, when the normal segregation member contained in the inverse segregation plug and the consutrode main body
Element at least one of iron, copper and chromium when, weight content of the normal segregation element of the same race in the inverse segregation plug for its
40%~60% of weight content in the consutrode main body；
When the negative segregation element contained in the inverse segregation plug and the consutrode main body be molybdenum, niobium and tantalum in extremely
When few a kind of, weight content of the negative segregation element of the same race in the inverse segregation plug is it in the consutrode main body
The 140%~180% of weight content.
In one of the embodiments, when the normal segregation member contained in the inverse segregation plug and the consutrode main body
When element is at least one of iron and copper, weight content of the normal segregation element of the same race in the inverse segregation plug is it described
50%~55% of weight content in consutrode main body.
In one of the embodiments, when the negative segregation member contained in the inverse segregation plug and the consutrode main body
When element is at least one of molybdenum and niobium, weight content of the negative segregation element of the same race in the inverse segregation plug is it described
160%~180% of weight content in consutrode main body.
A kind of preparation method of above-mentioned consutrode, comprises the following steps：
The species of each element needed for the alloy cast ingot to be prepared according to corresponding to consutrode and content configuration consutrode
The raw material of main body, and the consutrode main body is made in the raw material of the consutrode main body；
Inverse segregation plug described in the Specific disposition of each element needed for the alloy cast ingot to be prepared according to corresponding to consutrode
Raw material, and the inverse segregation plug is made in the raw material of the inverse segregation plug；
The inverse segregation plug is inserted in the through hole of the consutrode main body, consutrode is made.
A kind of application of above-mentioned consutrode in titan alloy casting ingot melting shaping.
Brief description of the drawings
Fig. 1 is the structure chart of the consutrode of an embodiment；
Fig. 2 is the structure chart of the consutrode body of consutrode shown in Fig. 1；
Fig. 3 is the structure chart of the inverse segregation plug of consutrode shown in Fig. 1；
Fig. 4 is the structure chart of the electrode module unit of consutrode shown in Fig. 1；
Fig. 5 is the schematic diagram that melting is molded in vaccum consumable electrode electric arc furnace of consutrode shown in Fig. 1；
Fig. 6~7 are to be carried out in the titan alloy casting ingot that embodiment 1~5, embodiment a~e, comparative example 1 and comparative example a are obtained
The schematic diagram of sample position during chemical composition analysis.
Embodiment
For the ease of understand the present invention, the present invention will be described more fully below, and give the present invention compared with
Good embodiment.But the present invention can realize in many different forms, however it is not limited to embodiment described herein.Phase
Instead, there is provided the purpose of these embodiments is to make the understanding more thorough and comprehensive to the disclosure.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
The arbitrary and all combination of the Listed Items of pass.
Reference picture 1, the consutrode 100 of a way of example, including the consutrode main body 110 of through hole is provided with vertically
And it is inserted in the inverse segregation plug 120 in through hole.
Reference picture 2~3, the species of the species of each element and each element in consutrode main body 110 in inverse segregation plug 120
It is identical.
When containing normal segregation element and/or negative segregation element in consutrode main body 110, normal segregation element of the same race is anti-
Weight content in segregation plug 120 is less than its weight content in consutrode main body 110, and negative segregation element of the same race is anti-
Weight content in segregation plug 120 is higher than its weight content in consutrode main body 110.
Applicants have discovered that the temperature of the core of consutrode 100 is higher than consutrode in the condensation process of molten bath
100 marginal portion can cause normal segregation element to be assembled from the edge of consutrode 100 to core.Conventional reduction segregation
Method be expand thermograde with improve setting rate or improve mold heat radiation speed.And the application creatively will
Consutrode 100 is designed to consutrode main body 110 and the combining structure of inverse segregation plug 120.The consutrode 100 suits
Rule of Segregation of the segregation element in process of setting, creatively solve consutrode 100 and produced in the condensation process of molten bath
Raw element segregation problem, so as to improve the quality stability of alloy cast ingot；Break simultaneously in the melting of consutrode 100
Traditional inverse segregation distributing mode of the alloy bag containing segregation element is added in journey manually, avoid alloy bag drop it is molten
Cause molten bath solution unstable the problem of influenceing alloy cast ingot quality in pond, also eliminate prepare the alloy bag containing segregation element and
The step of artificial cloth, the problem of artificial cloth inequality precision is unmanageable and production efficiency is low is it also avoid in addition, so as to
Cloth operation is simplified, improves production efficiency.
The consutrode 100 can be such that the segregation elements such as iron, copper, chromium, molybdenum, niobium and tantalum are added in titanium alloy, substitute tradition
The element of the expensive vanadium of the method generally use even segregation-free such as palladium tendency is as the main adding elements of titanium alloy
Technical scheme, while be not in large area β spots or the segregation problems such as local part is overproof.In addition the addition of the cheap element such as iron
Titanium alloy can be made to develop to low cost, to adapt to the market demand constantly expanded.
Specifically, each member as needed for alloy cast ingot to be prepared according to corresponding to consutrode 100 of consutrode main body 110
The raw material of species and the content configuration of element is made.
Preferably, the ratio between outside dimension of inverse segregation plug 120 and consutrode body 110 is 1:4~10.In the scope
Each element content in the more uniform closer target product of each element composition of the alloy cast ingot inside obtained.It is it is highly preferred that anti-
It is 1 to be segregated the ratio between outside dimension of plug 120 and consutrode body 110:5~7.
In feature of the alloying element main during alloy field is according to titanium alloy when vacuum consumable electrode arc furnace melting crystallizes,
Alloying element main in titanium alloy is divided into normal segregation element and secondary segregation element.Further, common normal segregation element
For iron, copper and chromium.Common negative segregation element is molybdenum, niobium and tantalum.
Further, when the normal segregation element contained in consutrode main body 110 is at least one of iron, copper and chromium
When, weight content of the normal segregation element of the same race in inverse segregation plug 120 is its weight content in consutrode main body 110
40%~60%.It is each in the more uniform closer target product of each element composition of the alloy cast ingot obtained within the range
Constituent content.
Further, when the normal segregation element contained in consutrode main body 110 is at least one of iron and copper,
Weight content of the normal segregation element of the same race in inverse segregation plug 120 is its weight content in consutrode main body 110
50%~55%.
Further, when the negative segregation element contained in consutrode main body 110 is at least one of molybdenum, niobium and tantalum
When, weight content of the negative segregation element of the same race in inverse segregation plug 120 is its weight content in consutrode main body 110
140%~180%.In the more uniform closer target product of each element composition of the alloy cast ingot obtained within the range
Each element content.
Further, when the negative segregation element contained in consutrode main body 110 is at least one of molybdenum and niobium,
Weight content of the negative segregation element of the same race in inverse segregation plug 120 is its weight content in consutrode main body 110
160%~180%.
In one of the embodiments, the length of inverse segregation plug 120 is more than the length of consutrode body 110.Consumable
The inverse segregation plug 120 of electrode 100 and consutrode main body 110 flush in the melting starting the arc and vacuum consumable at one end
The furnace bottom of the electric arc furnaces of electrode 100 is oppositely arranged, other end inverse segregation plug 120 be exposed to consutrode body 110 for
It is fixed, to be further ensured that inverse segregation plug 120 will not be mutually shifted with consutrode main body 110.
Specifically, inverse segregation plug 120 is exposed to the part of consutrode body 110 and can be fixed in the melting starting the arc very
The auxiliary electrode of the empty electric arc furnaces of consutrode 100.
Further, when containing normal segregation element and/or negative segregation element in consutrode main body 110, from from power consumption
One end that pole 100 flushes is to the other end, and the weight content of normal segregation element of the same race gradually reduces in consutrode main body 110, from
The weight content of negative segregation element of the same race gradually increases in power pole main body 110.So creatively from the footpath of consutrode 100
To the distribution that normal segregation element and negative segregation element in consutrode 100 are controlled with axial both direction, normal segregation member is suited
Element to the Rule of Segregation assembled at the top of alloy cast ingot, further increases the equal of Elemental redistribution in alloy cast ingot in process of setting
Even property, so as to further increase the quality stability of alloy cast ingot.
With continued reference to Fig. 2, further, consutrode main body 110 by multiple electrode module units 111 provided with through hole successively
It is bonded and is welded.And when containing normal segregation element and/or negative segregation element in consutrode main body 110, from from power consumption
One end that pole 100 flushes to the other end, weight content corresponding to the normal segregation element of the same race that multiple electrodes module unit 111 contains by
Gradually reduce, weight content corresponding to the negative segregation element of the same race that multiple electrodes module unit 111 contains gradually increases.So conveniently certainly
The manufacture of power pole main body 110 and the Elemental redistribution of convenient control consutrode main body 110.
With continued reference to Fig. 2, further, electrode module unit 111 includes multiple sub-electrode blocks 113, multiple sub-electrode blocks
113 are circumferentially spliced to form above-mentioned electrode module unit 111.Minimum during sub-electrode block 113 is prepared as consutrode 100 is block
Structure, it is by titanium sponge and various intermediate alloys or simple substance element material batch mixing, compressing, so not only by consutrode
100 break the whole up into parts, and the Elemental redistribution problem of consutrode 100 is converted into the distribution problem of sub-electrode block 113, reduce alloy
The Composition Control degree of ingot casting.Specifically, multiple component contents of sub-electrode block 113 in same electrode module unit 111 are identical.
Specifically, consutrode body 110 is cylindrical shape, and through hole is circular hole.During such consutrode body 110 is
Empty ring structures.More specifically, the through hole of consutrode body 110 is located at the center of consutrode body 110.Specifically, instead
It is also cylindrical shape structure to be segregated plug 120.
Preferably, sub-electrode block 113 is the grade piecemeal of electrode module unit 111.The cost of mold, convenient son can so be saved
The preparation of electrode block 113.Specifically, sub-electrode block 113 is the second-class piecemeal or fourth class piecemeal of electrode module unit 111.Specifically exist
In the present embodiment, sub-electrode block 113 is semicircular ring.In other embodiments, as shown in figure 4, sub-electrode block 113 is fourth class cyclotomy
Ring, electrode module unit 111 are made up of four sub- electrode blocks 113.
The preparation method of the above-mentioned consutrode of one embodiment, comprises the following steps S1~S3.
Step S1：The species of each element needed for the alloy cast ingot to be prepared according to corresponding to consutrode and content configuration are certainly
The raw material of power pole main body, and above-mentioned consutrode main body is made in the raw material of consutrode main body.
It is understood that the species of each element needed for alloy cast ingot to be prepared according to corresponding to consutrode and content configuration are certainly
The raw material of power pole main body can be obtained by conventional method in field.
Further, the raw material of consutrode main body is made to the consutrode main body for being provided with through hole vertically in step S1
The step of comprise the following steps：The raw material of consutrode main body is made to the electrode module unit provided with through hole；By multiple electrodes block
Unit is bonded and makes the through hole of multiple electrodes module unit corresponding successively, and forms consutrode main body by welding.
Specifically, above-mentioned welding is welded using vacuum plasma.
Further, the above-mentioned raw material by consutrode main body be made the step of electrode module unit provided with through hole include with
Lower step：Sub-electrode block is made in the raw material of consutrode main body, multiple sub-electrode blocks are circumferentially spliced to form provided with through hole
Electrode module unit.
Specifically, the quality of the consutrode neutron electrode block used in titan alloy casting ingot is not more than 50 kilograms, to enter one
Step improves the uniformity of Elemental redistribution.
Step S2：The Specific disposition inverse segregation core of each element needed for the alloy cast ingot to be prepared according to corresponding to consutrode
The raw material of rod, and above-mentioned inverse segregation plug is made in the raw material of inverse segregation plug.
Step S3：By in the through hole of inverse segregation plug insertion consutrode main body, consutrode is made.
The preparation method of the consutrode is simple, easy control of components.Obtained consutrode has suited segregation element and existed
Rule of Segregation in process of setting, creatively solve consutrode caused element segregation in the condensation process of molten bath and ask
Topic, so as to improve the quality stability of alloy cast ingot；Break simultaneously and added manually during consumable electrode melting
Add traditional inverse segregation distributing mode of the alloy bag containing segregation element, avoiding alloy bag and dropping causes molten bath solution in molten bath
Shakiness influences the problem of alloy cast ingot quality, also eliminates the step of preparing the alloy bag containing segregation element and artificial cloth,
The problem of artificial cloth inequality precision is unmanageable and production efficiency is low is it also avoid in addition, so as to simplify cloth operation,
Improve production efficiency.
Application of the above-mentioned consutrode of one embodiment in titan alloy casting ingot melting shaping.
The melting that the consutrode is applied to titan alloy casting ingot is molded, simple to operate, and feasibility is high, easy control of components；
And solve the problems, such as consutrode caused element segregation in the condensation process of molten bath, so as to improve the quality of alloy cast ingot
Stability；The tradition for adding the alloy bag containing segregation element manually during consumable electrode melting is broken simultaneously
Inverse segregation distributing mode, avoiding alloy bag and dropping causes molten bath solution unstable the problem of influenceing alloy cast ingot quality in molten bath,
The step of preparing the alloy bag containing segregation element and artificial cloth is also eliminated, it also avoid artificial cloth inequality precision in addition
The problem of unmanageable and production efficiency is low, so as to simplify cloth operation, improve production efficiency.
Specifically, the consutrode main body species of each element and content configuration according to needed for titan alloy casting ingot to be prepared is former
Material is made.Inverse segregation plug Specific disposition raw material of each element according to needed for titan alloy casting ingot to be prepared is made, and wherein just
Negative segregation element with from power consumption and main body positive and negative segregation element there is above-mentioned relation, therefore only need to be in the member of consutrode main body
Adjusted on the basis of cellulose content, and suitably reduce the content of titanium elements.
In one of the embodiments, application of the above-mentioned consutrode in titan alloy casting ingot melting shaping includes following step
Suddenly：Consutrode is subjected to vacuum self-consumption electrode arc melting, then handled through ingot casting, obtains titan alloy casting ingot.
Further, when the melting incipient stage is the melting starting the arc, one end that consutrode is flushed is down and and vacuum
The furnace bottom of consumable electrode arc furnace is oppositely arranged, and the other end is upward and vacuum consumable electricity is fixed in the part exposed of inverse segregation plug
The auxiliary electrode of pole electrical arc stove.
Further, vacuum self-consumption electrode arc melting includes three phases：One end that first consutrode is flushed down,
The other end is upward and the part exposed of inverse segregation plug is fixed on the auxiliary electrode of vaccum consumable electrode electric arc furnace and carries out the first rank
Section melting, as shown in Figure 5；The part that inverse segregation plug is exposed again carries out tack processing and exchanges direction so that consutrode passes through
Down, the other end carries out second stage melting upward for one end after tack processing；Direction is exchanged again carries out phase III melting.
Specifically, the condition of first stage melting is：Leak rate control is true in fusion process in below 0.7Pa/min
Reciprocal of duty cycle is controlled in below 10Pa, and melting electric current is 5~11KA, and melting voltage is 25~32V, and argon filling 6000 after melting~
10000Pa, at least cool down 3 hours.
Specifically, the condition of second stage melting is：Leak rate control is true in fusion process in below 0.7Pa/min
Reciprocal of duty cycle is controlled in below 8Pa, and melting electric current be 7~14KA, and melting voltage is 25~33V, after melting argon filling for 6000~
10000Pa, at least cool down 4 hours.
Specifically, the condition of phase III melting is：Leak rate control is true in fusion process in below 0.6Pa/min
Reciprocal of duty cycle is controlled in below 2Pa, and for melting electric current between 7~17KA, melting voltage is 27~38V, is at least cooled down 5 hours.
It is specific embodiment below.
Embodiment 1
The Ti1023 alloy cast ingot preparation methods of the normal segregation of element containing Fe are as follows.Ti1023 alloys main component is Ti-
10V-2Fe-3Al.Fe is the element that normal segregation easily occurs in essential element.
It is prepared by consutrode main body：Raw material is provided according to the supplying value of GB3620.1-2007 standard setting alloy each elements,
Fe desired values are 1.85wt% wherein in the ingot casting, and Fe is incorporated with 1.88wt% in consutrode main body.According to ingot casting ratio of height to diameter
And fusion process crucible ratio requires, raw material is pressed into the sub-electrode block of semi-circumference shape as shown in Figure 2, its outside dimension is Φ
340mm, sub-electrode block weight are not more than 40 kilograms.Two sub- electrode blocks are circumferentially spliced to form around center-pole to be led to provided with Φ 50mm
The electrode module unit in hole.7 electrode module units are bonded stacking around center-pole successively and make the through hole pair of 7 electrode module units
Should, both ends are fastened with compression plate, then are welded in vacuum plasma welding box, and both ends compression plate and center are removed after the completion of welding
Bar, obtains consutrode main body as shown in Figure 1, and its length is 2800mm.
It is prepared by inverse segregation plug：Element species are identical with consutrode main body contained by its raw material, but Fe supplying value reduces
For 1.0wt%, and the weight content of Ti elements is accordingly improved, Φ 50 × 2850mm inverse segregation plugs are made in the raw material.
Inverse segregation plug is inserted in the through hole of consutrode main body, and inverse segregation plug and consutrode main body are at one end
Flush, consutrode body is exposed in other end inverse segregation plug, consutrode is made.
Consutrode is placed in vaccum consumable electrode electric arc furnace and carries out melting, as shown in Figure 5.
One end that first consutrode is flushed is oppositely arranged down and with the furnace bottom of vaccum consumable electrode electric arc furnace 300, separately
One end is upward and the part exposed of inverse segregation plug is fixed on the auxiliary electrode 310 of vaccum consumable electrode electric arc furnace 300 and carries out the
The melting of one stage.First stage melting uses Φ 420mm cold-crucible 320, and leak rate is controlled in below 0.6Pa/min,
Vacuum degree control is in below 8Pa in fusion process, and melting electric current is 5~10KA, and melting voltage is 25~30V, argon filling after melting
6000~10000Pa, at least cool down 3 hours.
The part that inverse segregation plug is exposed again carries out tack processing and exchanges direction so that consutrode is handled through tack
Down, the other end carries out second stage melting upward for one end afterwards.Second stage melting uses Φ 500mm cold-crucible, leakage
Gas rate is controlled in below 0.6Pa/min, and for vacuum degree control in below 6Pa, melting electric current is 6~13KA in fusion process, is melted
Refining voltage is 25~32V, and argon filling is 6000~10000Pa after melting, is at least cooled down 4 hours.
Direction is exchanged again carries out phase III melting.Phase III melting uses Φ 580mm crucible, leak rate control
In below 0.5Pa/min, vacuum degree control is in below 2Pa in fusion process, and melting electric current is between 7~16KA, melting electricity
Press as 27~35V, at least cooling 5 hours.Ingot casting processing is finally carried out, obtains Ti1023 alloy cast ingots.
Embodiment 2
The Ti1023 alloy cast ingot preparation methods of the normal segregation of element containing Fe are as follows.Ti1023 alloys main component is Ti-
10V-2Fe-3Al.Fe is the element that normal segregation easily occurs in essential element.
It is prepared by consutrode main body：Raw material is provided according to the supplying value of GB3620.1-2007 standard setting alloy each elements,
Fe desired values are 1.85wt% wherein in the ingot casting, and Fe is incorporated with 1.92wt% in consutrode main body.According to ingot casting ratio of height to diameter
And fusion process crucible ratio requires, raw material is pressed into the sub-electrode block of semi-circumference shape as shown in Figure 2, its outside dimension is Φ
420mm, sub-electrode block weight are not more than 50 kilograms.Two sub- electrode blocks are circumferentially spliced to form around center-pole to be led to provided with Φ 85mm
The electrode module unit in hole.7 electrode module units are bonded stacking around center-pole successively and make the through hole pair of 7 electrode module units
Should, both ends are fastened with compression plate, then are welded in vacuum plasma welding box, and both ends compression plate and center are removed after the completion of welding
Bar, obtains consutrode main body as shown in Figure 1, and its length is 4500mm.
It is prepared by inverse segregation plug：Element species are identical with consutrode main body contained by its raw material, but Fe supplying value reduces
For 1.1wt%, and the weight content of Ti elements is accordingly improved, Φ 85 × 4550mm inverse segregation plugs are made in the raw material.
Inverse segregation plug is inserted in the through hole of consutrode main body, and inverse segregation plug and consutrode main body are at one end
Flush, consutrode body is exposed in other end inverse segregation plug, consutrode is made.
Consutrode is placed in vaccum consumable electrode electric arc furnace and carries out melting, as shown in Figure 5.
One end that first consutrode is flushed is oppositely arranged down and with the furnace bottom of vaccum consumable electrode electric arc furnace 300, separately
One end is upward and the part exposed of inverse segregation plug is fixed on the auxiliary electrode 310 of vaccum consumable electrode electric arc furnace 300 and carries out the
The melting of one stage.First stage melting uses Φ 500mm cold-crucible 320, and leak rate is controlled in below 0.7Pa/min,
Vacuum degree control is in below 10Pa in fusion process, and melting electric current is 6~11KA, and melting voltage is 26~32V, argon filling after melting
6000~10000Pa, at least cool down 4 hours.
The part that inverse segregation plug is exposed again carries out tack processing and exchanges direction so that consutrode is handled through tack
Down, the other end carries out second stage melting upward for one end afterwards.Second stage melting uses Φ 580mm cold-crucible, leakage
Gas rate is controlled in below 0.7Pa/min, and for vacuum degree control in below 8Pa, melting electric current is 7~14KA in fusion process, is melted
Refining voltage is 27~33V, and argon filling is 6000~10000Pa after melting, is at least cooled down 7 hours.
Direction is exchanged again carries out phase III melting.Phase III melting uses Φ 680mm crucible, leak rate control
In below 0.6Pa/min, for melting electric current between 8~17KA, melting voltage is 30~38V, is at least cooled down 7 hours.It is most laggard
The processing of row ingot casting, obtains Ti1023 alloy cast ingots.
Embodiment 3
Embodiment 3 is substantially the same manner as Example 1, and difference is inverse segregation plug preparation process：Fe in its raw material
Supplying value is reduced to 0.75wt%.
Embodiment 4
Embodiment 4 is substantially the same manner as Example 1, and difference is, the through hole internal diameter and inverse segregation of consutrode body
It is 42mm that plug, which is prepared into outside dimension,.
Embodiment 5
Embodiment 5 is substantially the same manner as Example 1, and difference is, 7 electrode module units control Fe weight in the preparation
Amount content from one end of consutrode main body to the other end be followed successively by 1.92wt%, 1.92wt%, 1.91wt%, 1.90wt%,
1.90wt%, 1.89wt%, 1.88wt% and 1.88wt%.
Comparative example 1
Comparative example 1 is substantially the same manner as Example 1, and difference is the preparation process of consutrode：Used in comparative example 1
Traditional solid consutrode, its raw material is identical with the consutrode main body of embodiment 1, and it is solid construction, is not used
Inverse segregation plug combines.
With reference to embodiment 1~6 and comparative example 1, Fe elements in alloy cast ingot are substituted with negative segregation elements Mo and carry out alloy casting
Prepared by ingot carries out embodiment a~e and comparative example a respectively, and Mo desired values are 1.85wt% wherein in the ingot casting.It is specific as follows：
Embodiment a is substantially the same manner as Example 1, and difference is, in the consutrode main body in embodiment a Mo with
1.88wt% is incorporated；Mo supplying value rises to 3.2wt% in prepared by inverse segregation plug.
Embodiment b and embodiment a are essentially identical, and difference is, in the consutrode main body in embodiment b Mo with
1.88wt% is incorporated；Mo supplying value rises to 2.1wt% in prepared by inverse segregation plug.
Embodiment c and embodiment a are essentially identical, and difference is, in the consutrode main body in embodiment b Mo with
1.88wt% is incorporated；Mo supplying value rises to 3.4wt% in prepared by inverse segregation plug.
Embodiment d and embodiment a are essentially identical, and difference is, the through hole internal diameter and inverse segregation plug of consutrode body
It is 42mm to be prepared into outside dimension.
Embodiment e and embodiment a are essentially identical, and difference is, 7 electrode module units control Mo weight to contain in the preparation
Amount from one end of consutrode main body to the other end be followed successively by 1.88wt%, 1.88wt%, 1.89wt%, 1.90wt%,
1.90wt%, 1.91wt%, 1.92wt% and 1.92wt%.
Comparative example a and embodiment a are essentially identical, and difference is the preparation process of consutrode：Used in comparative example a
Traditional solid consutrode, its raw material is identical with embodiment a consutrode main body, and it is solid construction, is not used
Inverse segregation plug combines.
In fusion process, comparative example 1 and comparative example a segregation problems are serious, and large area β occurs in its obtained titanium alloy
The major defects such as spot.And titanium alloy is without obvious β spots defect made from embodiment 1~5 and embodiment a~e.
The alloy cast ingot that embodiment 1~5, embodiment a~e, comparative example 1 and comparative example a are obtained, with first stage melting
When consutrode top one end be head, the bottom end of consutrode is bottom during first stage melting.As shown in fig. 6,
Respectively alloy cast ingot apart from head 200mm position A, middle part B and radial directions of the C along outer surface apart from bottom 200mm position
Uniform sampling 3, chemical composition analysis is carried out to sample, obtains the weight content such as Tables 1 and 2 institute of Fe elements and Mo elements
Show.As shown in fig. 7, respectively alloy cast ingot apart from head 200mm position A, middle part B and apart from bottom 50mm position D edges
Outer radial is splitted, and in as shown in Figure 7 1~9 totally nine position samples 9, is carried out chemical composition analysis to sample, obtained Fe
The weight content of element and Mo elements, unit wt%, as shown in Table 3 and Table 4.
Table 1
| Fe (wt%) | Position A | Position B | Position C | Wave amplitude | Average value |
| Embodiment 1 | 1.89 | 1.85 | 1.84 | 0.05 | 1.86 |
| Embodiment 2 | 1.92 | 1.89 | 1.86 | 0.06 | 1.89 |
| Embodiment 3 | 1.88 | 1.81 | 1.85 | 0.07 | 1.85 |
| Embodiment 4 | 1.88 | 1.88 | 1.82 | 0.06 | 1.86 |
| Embodiment 5 | 1.89 | 1.88 | 1.87 | 0.02 | 1.88 |
| Comparative example 1 | 1.90 | 1.88 | 1.82 | 0.08 | 1.87 |
Table 2
| Mo (wt%) | Position A | Position B | Position C | Wave amplitude | Average value |
| Embodiment a | 6.76 | 6.83 | 6.86 | 0.1 | 6.81 |
| Embodiment b | 6.76 | 6.8 | 6.88 | 0.12 | 6.81 |
| Embodiment c | 6.74 | 6.82 | 6.85 | 0.11 | 6.8 |
| Embodiment d | 6.75 | 6.83 | 6.88 | 0.13 | 6.82 |
| Embodiment e | 6.8 | 6.87 | 6.83 | 0.07 | 6.83 |
| Comparative example a | 6.74 | 6.82 | 6.89 | 0.15 | 6.81 |
Table 3
Table 4
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of consutrode, it is characterised in that including being provided with the consutrode main body of through hole vertically and being inserted in described logical
Inverse segregation plug in hole；The species of the species of each element and each element in the consutrode main body in the inverse segregation plug
It is identical；When containing normal segregation element and/or negative segregation element in the consutrode main body, normal segregation element of the same race is described
Weight content in inverse segregation plug is less than its weight content in the consutrode main body, and negative segregation element of the same race is in institute
The weight content stated in inverse segregation plug is higher than its weight content in the consutrode main body.
2. consutrode as claimed in claim 1, it is characterised in that the length of the inverse segregation plug is more than described from power consumption
The length of pole body；
The inverse segregation plug of the consutrode and consutrode main body flush in the melting starting the arc and vacuum at one end
The furnace bottom of consumable electrode arc furnace is oppositely arranged, inverse segregation plug described in the other end be exposed to the consutrode body with
In fixation.
3. consutrode as claimed in claim 2, it is characterised in that when containing normal segregation element in the consutrode main body
And/or during negative segregation element, from one end that the consutrode flushes to the other end, positively biased of the same race in the consutrode main body
The weight content of analysis element gradually reduces, and the weight content of negative segregation element of the same race gradually increases in the consutrode main body.
4. consutrode as claimed in claim 3, it is characterised in that the consutrode main body is by multiple electricity provided with through hole
Pole module unit is bonded and is welded successively；And when first containing normal segregation element and/or negative segregation in the consutrode main body
When plain, from one end that the consutrode flushes to the other end, normal segregation element of the same race that multiple electrode module units contain
Corresponding weight content gradually reduces, weight content corresponding to the negative segregation element of the same race that multiple electrode module units contain by
It is cumulative to add.
5. consutrode as claimed in claim 4, it is characterised in that the electrode module unit includes multiple sub-electrode blocks, more
The individual sub-electrode block is circumferentially spliced to form the electrode module unit.
6. the consutrode as described in any one of Claims 1 to 5, it is characterised in that when the inverse segregation plug and it is described from
When the normal segregation element contained in power pole main body is at least one of iron, copper and chromium, normal segregation element of the same race is described anti-
The weight content being segregated in plug is the 40%~60% of its weight content in the consutrode main body；
When the negative segregation element contained in the inverse segregation plug and the consutrode main body is at least one in molybdenum, niobium and tantalum
During kind, weight content of the negative segregation element of the same race in the inverse segregation plug is its weight in the consutrode main body
The 140%~180% of content.
7. consutrode as claimed in claim 6, it is characterised in that when the inverse segregation plug and the consutrode main body
In the normal segregation element that contains when being at least one of iron and chromium, weight of the normal segregation element of the same race in the inverse segregation plug
Measure 50%~55% that content is its weight content in the consutrode main body.
8. consutrode as claimed in claim 6, it is characterised in that when the inverse segregation plug and the consutrode main body
In the negative segregation element that contains when being at least one of molybdenum and niobium, weight of the negative segregation element of the same race in the inverse segregation plug
Measure 160%~180% that content is its weight content in the consutrode main body.
9. the preparation method of a kind of consutrode as described in any one of claim 1~8, it is characterised in that including following step
Suddenly：
The species of each element needed for the alloy cast ingot to be prepared according to corresponding to consutrode and content configuration consutrode main body
Raw material, and the consutrode main body is made in the raw material of the consutrode main body；
The original of inverse segregation plug described in the Specific disposition of each element needed for the alloy cast ingot to be prepared according to corresponding to consutrode
Material, and the inverse segregation plug is made in the raw material of the inverse segregation plug；
The inverse segregation plug is inserted in the through hole of the consutrode main body, consutrode is made.
A kind of 10. application of consutrode as described in any one of claim 1~8 in titan alloy casting ingot melting shaping.
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