CN107746982B - Consutrode and preparation method thereof and the application in titan alloy casting ingot melting molding - Google Patents
Consutrode and preparation method thereof and the application in titan alloy casting ingot melting molding Download PDFInfo
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- CN107746982B CN107746982B CN201711107805.6A CN201711107805A CN107746982B CN 107746982 B CN107746982 B CN 107746982B CN 201711107805 A CN201711107805 A CN 201711107805A CN 107746982 B CN107746982 B CN 107746982B
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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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- 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
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- C22C14/00—Alloys based on titanium
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Abstract
A kind of consutrode and preparation method thereof and the application in titan alloy casting ingot melting molding, the consutrode include along the inverse segregation plug for being axially arranged with the consutrode main body of through-hole and being inserted in through-hole；The type of each element is identical as the type 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, normal segregation element of the same race is lower than its weight content in consutrode main body in the weight content in inverse segregation plug, and negative segregation element of the same race is higher than its weight content in consutrode main body in the weight content in inverse segregation plug.The consutrode has suited Rule of Segregation of the segregation element in process of setting, creatively solves the problems, such as consutrode generated element segregation in the condensation process of molten bath, to improve the quality stability of alloy cast ingot.
Description
Technical field
The present invention relates to alloy casting technology fields, close more particularly to a kind of consutrode and preparation method thereof and in titanium
Application in golden ingot casting melting molding.
Background technique
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, in terms of the alloy casting in element segregation the problem of seriously leading to alloy material streaking it is more and more concerned.For example,
Titanium alloy mostly uses the mode 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 becomes ingot casting, since stability of the VAR fusion process to crucible air-tightness and molten bath itself has pole
High requirement is difficult to control the uniformity of alloying component by way of stirring in practical fusion process, thus titanium sponge and
Various alloying elements will be prepared into the more uniform consutrode of ingredient by processes such as mixing, compacting, welding, then carry out
VAR melting, but this method still can not overcome the problems, such as the generated element segregation in the condensation process of molten bath, the conjunction produced
Golden ingot casting quality is still unstable.
Summary of the invention
Based on this, it is necessary to provide a kind of consutrode and preparation method thereof that can be improved alloy cast ingot quality stability
With the application in titan alloy casting ingot melting molding.
A kind of consutrode is axially arranged with the consutrode main body of through-hole including edge and is inserted in reverse-biased in the through-hole
Analyse plug；The type of each element is identical as the type of each element in the consutrode main body in the inverse segregation plug；Work as institute
When stating in consutrode main body containing normal segregation element and/or negative segregation element, normal segregation element of the same race is in the inverse segregation core
Weight content in stick is lower 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 central part 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 central part.The method of conventional reduction segregation is to expand
Big temperature gradient is to improve setting rate or improve the heat radiation speed of mold.And the application creatively sets consutrode
Count into the composite structure of consutrode main body and inverse segregation plug.The consutrode has suited segregation element in process of setting
Rule of Segregation creatively solves the problems, such as consutrode generated element segregation in the condensation process of molten bath, to improve
The quality stability of alloy cast ingot；Break simultaneously and has been added manually during consumable electrode melting containing segregation member
Traditional inverse segregation distributing mode of the alloy packet of element, avoiding alloy packet and falling in molten bath causes molten bath solution shakiness to influence alloy
The problem of ingot casting quality, also eliminates the step of preparing the alloy packet and artificial cloth containing segregation element, in addition also avoids
The problem that artificial cloth unevenness precision is difficult to control and production efficiency is low improves production effect to simplify cloth operation
Rate.
The length of the inverse segregation plug is greater than the length of the consutrode ontology in one of the embodiments,；
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 inverse segregation plug described in the other end is exposed to the consutrode ontology
For fixing.
In one of the embodiments, when in the consutrode main body contain normal segregation element and/or negative segregation element
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 decreases, and the weight content of negative segregation element of the same race gradually increases in the consutrode main body.
The consutrode main body is successively bonded by multiple electrode module units equipped with through-hole in one of the embodiments,
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
One end that pole flushes is to the other end, and the corresponding weight content of normal segregation element of the same race that multiple electrode module units contain is gradually
It reduces, the corresponding weight content of negative segregation element of the same race that multiple electrode module units contain gradually increases.
The electrode module unit includes multiple sub-electrode blocks in one of the embodiments, 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
When element is at least one of iron, copper and chromium, weight content of the normal segregation element of the same race in the inverse segregation plug be it
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, negative segregation element of the same race is it in the consutrode main body in the weight content in the inverse segregation plug
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, comprising the following steps:
Consutrode is configured according to the type and content of each element needed for the corresponding alloy cast ingot to be prepared of consutrode
The raw material of main body, and the consutrode main body is made in the raw material of the consutrode main body；
According to inverse segregation plug described in the Specific disposition of each element needed for the corresponding alloy cast ingot to be prepared of 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 into 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 molding.
Detailed description of the invention
Fig. 1 is the structure chart of the consutrode of an embodiment；
Fig. 2 is the structure chart of the consutrode ontology 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 molding schematic diagram of consutrode melting in vaccum consumable electrode electric arc furnace shown in Fig. 1；
It is carried out in the titan alloy casting ingot that Fig. 6~7 obtain for Examples 1 to 5, embodiment a~e, comparative example 1 and comparative example a
The schematic diagram of sample position when chemical composition analysis.
Specific embodiment
To facilitate the understanding of the present invention, below will to invention is more fully described, and give it is of the invention compared with
Good embodiment.But the invention can be realized in many different forms, however it is not limited to embodiment described herein.Phase
Instead, purpose of providing these embodiments is makes the disclosure of the present invention more thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention 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
Any and all combinations of the listed item of pass.
Referring to Fig.1, the consutrode 100 of a way of example, including along the consutrode main body 110 for being axially arranged with through-hole
And it is inserted in the inverse segregation plug 120 in through-hole.
Referring to Fig. 2~3, in inverse segregation plug 120 in the type and consutrode main body 110 of each element each element type
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-
The weight content being segregated in plug 120 is lower than its weight content in consutrode main body 110, and negative segregation element of the same race is anti-
The weight content being segregated in plug 120 is higher than its weight content in consutrode main body 110.
Applicants have discovered that the temperature of the central part of consutrode 100 is higher than consutrode in the condensation process of molten bath
100 marginal portion will lead to normal segregation element and assemble from the edge of consutrode 100 to central part.Conventional reduction segregation
Method be expand temperature gradient with improve setting rate or improve mold heat radiation speed.And the application creatively will
Consutrode 100 is designed to the composite structure of consutrode main body 110 and inverse segregation plug 120.The consutrode 100 suits
Rule of Segregation of the segregation element in process of setting creatively solves consutrode 100 and is produced in the condensation process of molten bath
Raw element segregation problem, to improve the quality stability of alloy cast ingot；Break simultaneously in 100 melting of consutrode
The traditional inverse segregation distributing mode for adding the alloy packet containing segregation element in journey manually, avoid alloy packet fall it is molten
Cause in pond molten bath solution shakiness influence alloy cast ingot quality the problem of, also eliminate preparation the alloy packet containing segregation element and
In addition the step of artificial cloth, also avoids the problem that artificial cloth unevenness precision is difficult to control and production efficiency is low, thus
Cloth operation is simplified, production efficiency is improved.
The consutrode 100 can be such that the segregation elements such as iron, copper, chromium, molybdenum, niobium and tantalum are added in titanium alloy, substitution tradition
Method generallys use main adding elements of the element of the segregation-frees such as expensive vanadium even palladium tendency as titanium alloy
Technical solution, while being not in large area β spot or the overproof equal segregation problems of local part.Furthermore the addition of the cheap element such as iron
Titanium alloy can be made to develop to low cost, to adapt to the ever-expanding market demand.
Specifically, consutrode main body 110 is as each member according to needed for the corresponding alloy cast ingot to be prepared of consutrode 100
The raw material of the type and content configuration of element is made.
Preferably, the ratio between outer diameter of inverse segregation plug 120 and consutrode ontology 110 is 1:4~10.In the range
Each element content in the more uniform and closer target product of each element ingredient of the alloy cast ingot inside obtained.It is highly preferred that anti-
Being segregated the ratio between outer diameter of plug 120 and consutrode ontology 110 is 1:5~7.
Alloy field according to alloying element main in titanium alloy vacuum consumable electrode arc furnace melting crystallize when feature,
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, normal segregation element of the same race is its weight content in consutrode main body 110 in the weight content in inverse segregation plug 120
40%~60%.It is each in the more uniform and closer target product of each element ingredient of the alloy cast ingot obtained in the range
Constituent content.
Further, when the normal segregation element contained in consutrode main body 110 is at least one of iron and copper,
Normal segregation element of the same race is its weight content in consutrode main body 110 in the weight content in inverse segregation plug 120
50%~55%.
Further, when the negative segregation element contained in consutrode main body 110 is at least one of molybdenum, niobium and tantalum
When, negative segregation element of the same race is its weight content in consutrode main body 110 in the weight content in inverse segregation plug 120
140%~180%.In the more uniform and closer target product of each element ingredient of the alloy cast ingot obtained in 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,
Negative segregation element of the same race is its weight content in consutrode main body 110 in the weight content in inverse segregation plug 120
160%~180%.
The length of inverse segregation plug 120 is greater than the length of consutrode ontology 110 in one of the embodiments,.Consumable
The inverse segregation plug 120 of electrode 100 and consutrode main body 110 are flushed at one end in the melting starting the arc and vacuum consumable
The furnace bottom of 100 electric arc furnaces of electrode is oppositely arranged, and is exposed to consutrode ontology 110 in other end inverse segregation plug 120 to be used for
It is fixed, to be further ensured that inverse segregation plug 120 will not be mutually shifted with consutrode main body 110.
Specifically, the part that inverse segregation plug 120 is exposed to consutrode ontology 110 can be fixed on very in the melting starting the arc
The auxiliary electrode of empty 100 electric arc furnaces of consutrode.
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 decreases 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 diameter of consutrode 100
To the distribution with normal segregation element and negative segregation element in axial both direction control consutrode 100, normal segregation member is suited
Element, to the Rule of Segregation assembled at the top of alloy cast ingot, further improves the equal of Elemental redistribution in alloy cast ingot in process of setting
Even property, to further improve the quality stability of alloy cast ingot.
With continued reference to Fig. 2, further, consutrode main body 110 by multiple electrode module units 111 equipped 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, the corresponding weight content of normal segregation element of the same race that multiple electrodes module unit 111 contains by
It gradually reduces, the corresponding weight content of 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 for facilitating 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.Sub-electrode block 113 is blocky as the minimum in the preparation of consutrode 100
Structure, by titanium sponge and various intermediate alloys or simple substance element material mixing, compression moulding, so not only by consutrode
100 break the whole up into parts, and so that 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 113 component contents of sub-electrode block in same electrode module unit 111 are identical.
Specifically, consutrode ontology 110 is cylindrical shape, and through-hole is circular hole.During such consutrode ontology 110 is
Empty ring structures.More specifically, the through-hole of consutrode ontology 110 is set to the center of consutrode ontology 110.Specifically, instead
Being segregated plug 120 is also cylindrical shape structure.
Preferably, sub-electrode block 113 is the equal piecemeals of electrode module unit 111.The cost that mold can so be saved, facilitates son
The preparation of electrode block 113.Specifically, sub-electrode block 113 is the second-class piecemeal or quartering block 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 quartering circle
Ring, electrode module unit 111 are made of four sub- electrode blocks 113.
The preparation method of the above-mentioned consutrode of one embodiment, includes the following steps S1~S3.
Step S1: certainly according to the configuration of the type and content of each element needed for the corresponding alloy cast ingot to be prepared of consutrode
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 type and content configuration of each element according to needed for consutrode corresponding alloy cast ingot to be prepared is 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 along the consutrode main body for being axially arranged with through-hole in step S1
The step of the following steps are included: the raw material of consutrode main body to be made to the electrode module unit equipped with through-hole；By multiple electrodes block
Unit is successively bonded and keeps the through-hole of multiple electrodes module unit corresponding, 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 equipped 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 equipped 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, with into one
Step improves the uniformity of Elemental redistribution.
Step S2: according to the Specific disposition inverse segregation core of each element needed for the corresponding alloy cast ingot to be prepared of consutrode
The raw material of stick, and above-mentioned inverse segregation plug is made in the raw material of inverse segregation plug.
Step S3: by 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.Consutrode obtained has suited segregation element and has existed
Rule of Segregation in process of setting creatively solves consutrode generated element segregation in the condensation process of molten bath and asks
Topic, to improve the quality stability of alloy cast ingot；Break simultaneously and has added manually during consumable electrode melting
Add traditional inverse segregation distributing mode of the alloy packet containing segregation element, avoiding alloy packet and falling in molten bath leads to molten bath solution
Shakiness influences the problem of alloy cast ingot quality, also eliminates the step of preparing the alloy packet and artificial cloth containing segregation element,
In addition the problem that artificial cloth unevenness precision is difficult to control and production efficiency is low is also avoided, so that cloth operation is simplified,
Improve production efficiency.
Application of the above-mentioned consutrode of one embodiment in titan alloy casting ingot melting molding.
The melting that the consutrode is applied to titan alloy casting ingot forms, easy to operate, and feasibility is high, easy control of components；
And solve the problems, such as consutrode generated element segregation in the condensation process of molten bath, to improve the quality of alloy cast ingot
Stability；The tradition for adding the alloy packet containing segregation element manually during consumable electrode melting is broken simultaneously
Inverse segregation distributing mode avoids alloy packet and falls in molten bath the problem of causing molten bath solution shakiness to influence alloy cast ingot quality,
The step of preparing the alloy packet and artificial cloth containing segregation element is also eliminated, artificial cloth unevenness precision is in addition also avoided
Uncontrollable and low production efficiency problem improves production efficiency to simplify cloth operation.
Specifically, the type and content of consutrode main body each element according to needed for titan alloy casting ingot to be prepared configures former
Material is made.The Specific disposition raw material of inverse segregation plug 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
It is adjusted on the basis of cellulose content, and suitably reduces the content of titanium elements.
Application of the above-mentioned consutrode in titan alloy casting ingot melting molding in one of the embodiments, includes following step
It is rapid: consutrode being subjected to vacuum self-consumption electrode arc melting, then is handled through ingot casting, titan alloy casting ingot is obtained.
Further, in melting incipient stage, that is, melting starting the arc, one end that consutrode is flushed downward 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 of inverse segregation plug exposing
The auxiliary electrode of pole electrical arc furnace.
Further, vacuum self-consumption electrode arc melting includes three phases: the one end for first flushing consutrode downward,
The other end upward and inverse segregation plug expose part be fixed on vaccum consumable electrode electric arc furnace auxiliary electrode carry 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
Downward, the other end carries out second stage melting upward for tack treated one end；Direction is exchanged again carries out phase III melting.
Specifically, the condition of first stage melting are as follows: leak rate control is in 0.7Pa/min hereinafter, true in fusion process
In 10Pa hereinafter, melting electric current is 5~11KA, melting voltage is 25~32V for reciprocal of duty cycle control, argon filling 6000 after melting~
10000Pa, it is at least 3 hours cooling.
Specifically, the condition of second stage melting are as follows: leak rate control is in 0.7Pa/min hereinafter, true in fusion process
Reciprocal of duty cycle control in 8Pa hereinafter, melting electric current be 7~14KA, melting voltage be 25~33V, after melting argon filling be 6000~
10000Pa, it is at least 4 hours cooling.
Specifically, the condition of phase III melting are as follows: leak rate control is in 0.6Pa/min hereinafter, true in fusion process
In 2Pa hereinafter, melting electric current is between 7~17KA, melting voltage is 27~38V, at least 5 hours cooling for reciprocal of duty cycle control.
The following are specific embodiments.
Embodiment 1
The Ti1023 alloy cast ingot preparation method of the normal segregation of element containing Fe is as follows.Ti1023 alloy main component is Ti-
10V-2Fe-3Al.Fe is the element that normal segregation easily occurs in essential element.
Consutrode subject preparation: providing raw material according to the supplying value of GB3620.1-2007 standard setting alloy each element,
Wherein Fe target value is 1.85wt% in the ingot casting, and Fe is incorporated in consutrode main body with 1.88wt%.According to ingot casting ratio of height to diameter
And fusion process crucible presses raw materials into the sub-electrode block of semi-circumference shape as shown in Figure 2, outer diameter Φ than requiring
340mm, sub-electrode block weight are not more than 40 kilograms.Two sub- electrode blocks are circumferentially spliced to form logical equipped with Φ 50mm around center-pole
The electrode module unit in hole.7 electrode module units are successively bonded stacking around center-pole and make the through-hole pair of 7 electrode module units
It answers, both ends are fastened with compression plate, then are welded in vacuum plasma welding box, removal both ends compression plate and center after the completion of welding
Bar obtains consutrode main body as shown in Figure 1, and the length is 2800mm.
The preparation of inverse segregation plug: element species contained by its raw material are identical as consutrode main body, but the supplying value of Fe reduces
For 1.0wt%, and the weight content of Ti element is correspondinglyd increase, which is made Φ 50 × 2850mm inverse segregation plug.
Inverse segregation plug is inserted into the through-hole of consutrode main body, and inverse segregation plug and consutrode main body are at one end
It flushes, is exposed to consutrode ontology 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.
First one end that consutrode flushes is oppositely arranged downward 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 use Φ 420mm cold-crucible 320, leak rate control in 0.6Pa/min hereinafter,
For vacuum degree control in 8Pa hereinafter, melting electric current is 5~10KA, melting voltage is 25~30V, argon filling after melting in fusion process
6000~10000Pa, it is at least 3 hours cooling.
The part that inverse segregation plug is exposed again carries out tack processing and exchanges direction so that consutrode is handled through tack
Downward, the other end carries out second stage melting upward for one end afterwards.Second stage melting uses the cold-crucible of Φ 500mm, leakage
Gas rate control in 0.6Pa/min hereinafter, in fusion process vacuum degree control in 6Pa hereinafter, melting electric current be 6~13KA, melt
Refining voltage is 25~32V, and argon filling is 6000~10000Pa after melting, at least 4 hours cooling.
Direction is exchanged again carries out phase III melting.Phase III melting uses the crucible of Φ 580mm, leak rate control
In 0.5Pa/min hereinafter, melting is electric in vacuum degree control in fusion process in 2Pa hereinafter, melting electric current is between 7~16KA
Pressure is 27~35V, at least 5 hours cooling.Ingot casting processing is finally carried out, Ti1023 alloy cast ingot is obtained.
Embodiment 2
The Ti1023 alloy cast ingot preparation method of the normal segregation of element containing Fe is as follows.Ti1023 alloy main component is Ti-
10V-2Fe-3Al.Fe is the element that normal segregation easily occurs in essential element.
Consutrode subject preparation: providing raw material according to the supplying value of GB3620.1-2007 standard setting alloy each element,
Wherein Fe target value is 1.85wt% in the ingot casting, and Fe is incorporated in consutrode main body with 1.92wt%.According to ingot casting ratio of height to diameter
And fusion process crucible presses raw materials into the sub-electrode block of semi-circumference shape as shown in Figure 2, outer diameter Φ than requiring
420mm, sub-electrode block weight are not more than 50 kilograms.Two sub- electrode blocks are circumferentially spliced to form logical equipped with Φ 85mm around center-pole
The electrode module unit in hole.7 electrode module units are successively bonded stacking around center-pole and make the through-hole pair of 7 electrode module units
It answers, both ends are fastened with compression plate, then are welded in vacuum plasma welding box, removal both ends compression plate and center after the completion of welding
Bar obtains consutrode main body as shown in Figure 1, and the length is 4500mm.
The preparation of inverse segregation plug: element species contained by its raw material are identical as consutrode main body, but the supplying value of Fe reduces
For 1.1wt%, and the weight content of Ti element is correspondinglyd increase, which is made Φ 85 × 4550mm inverse segregation plug.
Inverse segregation plug is inserted into the through-hole of consutrode main body, and inverse segregation plug and consutrode main body are at one end
It flushes, is exposed to consutrode ontology 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.
First one end that consutrode flushes is oppositely arranged downward 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 use Φ 500mm cold-crucible 320, leak rate control in 0.7Pa/min hereinafter,
For vacuum degree control in 10Pa hereinafter, melting electric current is 6~11KA, melting voltage is 26~32V, argon filling after melting in fusion process
6000~10000Pa, it is at least 4 hours cooling.
The part that inverse segregation plug is exposed again carries out tack processing and exchanges direction so that consutrode is handled through tack
Downward, the other end carries out second stage melting upward for one end afterwards.Second stage melting uses the cold-crucible of Φ 580mm, leakage
Gas rate control in 0.7Pa/min hereinafter, in fusion process vacuum degree control in 8Pa hereinafter, melting electric current be 7~14KA, melt
Refining voltage is 27~33V, and argon filling is 6000~10000Pa after melting, at least 7 hours cooling.
Direction is exchanged again carries out phase III melting.Phase III melting uses the crucible of Φ 680mm, leak rate control
In 0.6Pa/min hereinafter, melting electric current is between 8~17KA, melting voltage is 30~38V, at least 7 hours cooling.It is most laggard
The processing of row ingot casting, obtains Ti1023 alloy cast ingot.
Embodiment 3
Embodiment 3 is substantially the same manner as Example 1, the difference is that inverse segregation plug preparation step: Fe in its raw material
Supplying value is reduced to 0.75wt%.
Embodiment 4
Embodiment 4 is substantially the same manner as Example 1, the difference is that, the through-hole internal diameter and inverse segregation of consutrode ontology
It is 42mm that plug, which is prepared into outer diameter,.
Embodiment 5
Embodiment 5 is substantially the same manner as Example 1, the difference is that, 7 electrode module units control the weight of Fe 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, the difference is that the preparation step of consutrode: using in comparative example 1
Traditional solid consutrode, raw material is identical with the consutrode main body of embodiment 1, is solid construction, does not use
The combination of inverse segregation plug.
Referring to Examples 1 to 6 and comparative example 1, alloy casting is carried out with Fe element in negative segregation elements Mo substitution alloy cast ingot
Ingot preparation carries out embodiment a~e and comparative example a respectively, and wherein Mo target value is 1.85wt% 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% supplying；The supplying value of Mo rises to 3.2wt% in the preparation of 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% supplying；The supplying value of Mo rises to 2.1wt% in the preparation of 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% supplying；The supplying value of Mo rises to 3.4wt% in the preparation of 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 ontology
Being prepared into outer diameter is 42mm.
Embodiment e and embodiment a are essentially identical, and difference is, the weight that 7 electrode module units control Mo in the preparation contains
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, the difference is that the preparation step of consutrode: using in comparative example a
Traditional solid consutrode, raw material is identical with the consutrode main body of embodiment a, is solid construction, does not use
The combination of inverse segregation plug.
In fusion process, the segregation problems of comparative example 1 and comparative example a are serious, and large area β occurs in titanium alloy obtained
The major defects such as spot.And titanium alloy made from Examples 1 to 5 and embodiment a~e is without obvious β spot defect.
The alloy cast ingot that Examples 1 to 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 when first stage melting.As shown in fig. 6,
The radial direction of position A in alloy cast ingot apart from head 200mm, middle part B and position C apart from bottom 200mm along outer surface respectively
Uniform sampling 3, chemical composition analysis is carried out to sample, obtains the weight content such as Tables 1 and 2 institute of Fe element and Mo element
Show.As shown in fig. 7, the position A in alloy cast ingot apart from head 200mm, middle part B and the position edge D apart from bottom 50mm respectively
Outer radial is splitted, and in as shown in Figure 7 1~9 totally nine position sample 9, is carried out chemical composition analysis to sample, obtained Fe
The weight content of element and Mo element, 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, for simplicity of description, not to above-mentioned reality
It applies 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, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (9)
1. a kind of consutrode, which is characterized in that be axially arranged with the consutrode main body of through-hole including edge and be inserted in described logical
Inverse segregation plug in hole；The type of the type 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 lower 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；
The inverse segregation plug of the consutrode and consutrode main body are flushed at one end in the melting starting the arc and vacuum
The furnace bottom of consumable electrode arc furnace is oppositely arranged；
When containing normal segregation element and/or negative segregation element in the consutrode main body, flushed from the consutrode
One end is to the other end, and the weight content of normal segregation element of the same race gradually decreases in the consutrode main body, the consutrode
The weight content of negative segregation element of the same race gradually increases in main body.
2. consutrode as described in claim 1, which is characterized in that the length of the inverse segregation plug is greater than described from power consumption
The length of pole ontology；
In the opposite other end in the one end flushed with the consutrode, the inverse segregation plug is exposed to the consutrode sheet
Body is for fixing.
3. consutrode as described in claim 1, which is characterized in that the consutrode main body is by multiple electricity equipped with through-hole
Pole module unit is successively bonded and is welded；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 decreases, the corresponding weight content of negative segregation element of the same race that multiple electrode module units contain by
It is cumulative to add.
4. consutrode as claimed in claim 3, which is characterized in that the electrode module unit includes multiple sub-electrode blocks, more
A sub-electrode block is circumferentially spliced to form the electrode module unit.
5. such as the described in any item consutrodes of Claims 1 to 4, which is characterized 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；
As at least one that the negative segregation element contained in the inverse segregation plug and the consutrode main body is in molybdenum, niobium and tantalum
When kind, negative segregation element of the same race is its weight in the consutrode main body in the weight content in the inverse segregation plug
The 140%~180% of content.
6. consutrode as claimed in claim 5, which is characterized 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.
7. consutrode as claimed in claim 5, which is characterized 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.
8. a kind of preparation method of consutrode as described in any one of claims 1 to 7, which is characterized in that including following step
It is rapid:
Consutrode main body is configured according to the type and content of each element needed for the corresponding alloy cast ingot to be prepared of consutrode
Raw material, and the consutrode main body is made in the raw material of the consutrode main body；
According to the original of inverse segregation plug described in the Specific disposition of each element needed for the corresponding alloy cast ingot to be prepared of consutrode
Material, and the inverse segregation plug is made in the raw material of the inverse segregation plug；
The inverse segregation plug is inserted into the through-hole of the consutrode main body and makes the inverse segregation plug and consumable
Electrode body is flushed at one end to be made certainly for being oppositely arranged in the melting starting the arc with the furnace bottom of vaccum consumable electrode electric arc furnace
Power pole.
9. a kind of application of consutrode as described in any one of claims 1 to 7 in titan alloy casting ingot melting molding.
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| CN109047687A (en) * | 2018-10-18 | 2018-12-21 | 东北大学 | A kind of dual alloy synchronizes the device and method of the large-scale uniformly ingot casting of remelting preparation |
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| CN109777980B (en) * | 2019-02-28 | 2021-03-30 | 陕西天成航空材料有限公司 | Method for reducing segregation of high-iron-content titanium alloy ingot |
| CN112501448B (en) * | 2020-11-11 | 2022-05-03 | 湖南金天钛业科技有限公司 | Method for smelting alloy in vacuum consumable mode |
| 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 |
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Address after: No. 97, Qianming Road, Qingshan Community, Deshan Street, Changde Economic and Technological Development Zone, Changde City, Hunan Province, 415001 Patentee after: Hunan Xiangtou Jintian Titanium Technology Co., Ltd. Address before: 415001 No.97, Qianming Road, Changde economic and Technological Development Zone, Hunan Province Patentee before: HUNAN GOLDSKY TITANIUM INDUSTRY TECHNOLOGY Co.,Ltd. |