CN103736978A - Method for reducing interfacial reaction of titanium aluminum base alloy melt and graphite casting mold - Google Patents
Method for reducing interfacial reaction of titanium aluminum base alloy melt and graphite casting mold Download PDFInfo
- Publication number
- CN103736978A CN103736978A CN201310753716.4A CN201310753716A CN103736978A CN 103736978 A CN103736978 A CN 103736978A CN 201310753716 A CN201310753716 A CN 201310753716A CN 103736978 A CN103736978 A CN 103736978A
- Authority
- CN
- China
- Prior art keywords
- base alloy
- aluminium base
- titanium aluminium
- alloy melt
- hydrogen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention relates to a method for reducing the interfacial reaction of a titanium aluminum base alloy melt and a graphite casting mold, and belongs to a manufacturing method of a titanium aluminum base alloy casting. The method solves the problems that the interfacial reaction of the titanium aluminum base alloy melt and the graphite casting mold is serious and the performance of the titanium aluminum base alloy casting is reduced. According to the method, hydrogen is introduced during the smelting pouring process of titanium aluminum base alloy, the partial pressure of the introduced hydrogen is not lower than 5 kPa, the action time of the hydrogen and the titanium aluminum base alloy melt is not smaller than 2 minutes, and then the obtained titanium aluminum base alloy melt is poured in the graphite casting mold. The method is simple in technology, lower in energy consumption and cost and easy to realize in the production, effectively reduces the interfacial reaction of the titanium aluminum base alloy melt and the graphite casting mold, and is suitable for common smelting manners such as non-self-consuming arc-melting and water-cooling crucible sensing smelting.
Description
Technical field
The invention belongs to the manufacture method of titanium aluminium base alloy foundry goods, relate in particular to a kind of method that reduces titanium aluminium base alloy melt and graphite casting mould interfacial reaction, for improving the performance of titanium aluminium base alloy foundry goods.
Background technology
Titanium aluminium base alloy material has the advantages such as good elevated temperature strength, creep resistance and antioxygenic property, be considered to a kind of novel light high-temperature structural material of future generation with broad prospect of application, can be used for manufacturing compressor, gas turbine blades, compressor stator deep bead, out frame and the casting of other complex-shaped large scales and forging parts, with part, substitute heavy nickel base superalloy, can loss of weight approximately 50%.The manufacturing technology of titanium aluminium base alloy is a lot, and as casting, forging, powder metallurgy etc., wherein foundry engieering is because it is applicable to various shapes, utilization rate of raw materials high is widely used.
Titanium aluminium base alloy melt has high chemical reactivity, almost with all casting mold refractory materials, interfacial reaction all occurs, and causes surface quality of continuous castings poor, has reduced mechanical property, and yield rate is greatly reduced.Therefore, the selection of casting mold refractory material and the control of interfacial reaction seem very important.Graphite has the features such as low, high temperature resistant, the easy processing of cost, thermal shock resistance is good, has become the mold material that titanium-base alloy and titanium aluminium base alloy generally adopt.But still there is stronger interfacial reaction in graphite casting mould and titanium aluminium base alloy melt, the titanium aluminium base alloy foundry goods of graphite casting mould cast at present adopts later stage machined to remove surface reaction layer more, so not only waste raw material, and also can exert an influence to the performance of titanium aluminium base alloy.In order to use in a large number graphite casting mould cheaply, just need to control the interfacial reaction of graphite casting mould and titanium aluminium base alloy melt.Therefore, the interfacial reaction of reduction titanium aluminium base alloy melt and graphite casting mould seems very urgent.
Summary of the invention
The invention provides a kind of method that reduces titanium aluminium base alloy melt and graphite casting mould interfacial reaction, solve in existing casting technique the interfacial reaction of titanium aluminium base alloy melt and graphite casting mould serious, the problem that titanium aluminium base alloy cast properties reduces.
A kind of method that reduces titanium aluminium base alloy melt and graphite casting mould interfacial reaction provided by the present invention, is characterized in that:
In the fusion process of titanium aluminium base alloy, pass into hydrogen, the dividing potential drop that passes into hydrogen is not less than 5kPa, and hydrogen and titanium aluminium base alloy melt are no less than 2 minutes action time, then by resulting titanium aluminium base alloy melt cast in graphite casting mould.
Described reduction titanium aluminium base alloy melt and the method for graphite casting mould interfacial reaction, is characterized in that:
After alloy smelting furnace vacuumizes, pass into hydrogen, the required titanium aluminium base alloy of raw material melting being formed by elemental metals and intermediate alloy, then by resulting titanium aluminium base alloy melt cast in graphite casting mould.
Described reduction titanium aluminium base alloy melt and the method for graphite casting mould interfacial reaction, is characterized in that:
When passing into hydrogen, pass into argon gas, the pressure that passes into argon gas is Hydrogen Vapor Pressure 1～2 times, the purity of argon gas is 99.999%.
Described reduction titanium aluminium base alloy melt and the method for graphite casting mould interfacial reaction, is characterized in that, it comprises molten alloy step and cast step:
Molten alloy step: in alloy smelting furnace, after vacuumizing, pass into argon gas or directly start melting titanium aluminium base alloy, obtaining titanium aluminium base alloy melt;
Cast step: alloy smelting furnace vacuumizes again, then passes into hydrogen, continues melting to the titanium aluminium base alloy melt that obtains, makes hydrogen and the effect of titanium aluminium base alloy melt, then by resulting titanium aluminium base alloy melt cast in graphite casting mould.
Described reduction titanium aluminium base alloy melt and the method for graphite casting mould interfacial reaction, is characterized in that:
In described molten alloy step, when described alloy smelting furnace is non-consumable arc-melting furnace, pass into argon gas as protection gas, titanium aluminium base alloy melt is through three meltings: utilize for the first time the raw material being comprised of elemental metals and intermediate alloy to carry out melting, treat that titanium aluminium base alloy melt cooling becomes alloy cast ingot; After described alloy cast ingot upset, carry out melting for the second time, treat that titanium aluminium base alloy melt cooling becomes secondary alloy ingot casting; After described secondary alloy ingot overturning, then carry out melting for the third time, obtain the uniform titanium aluminium base alloy melt of composition.
Described reduction titanium aluminium base alloy melt and the method for graphite casting mould interfacial reaction, is characterized in that:
In described cast step, when passing into hydrogen, pass into argon gas, the pressure that passes into argon gas is Hydrogen Vapor Pressure 1～2 times, the purity of argon gas is 99.999%.
The time that the present invention passes into hydrogen can be the stage that molten alloy starts, or the stage before pouring cast part, guarantees hydrogen and titanium aluminium base alloy melt the shortest action time.In molten alloy process, in furnace chamber, can not exist and exist with the argon gas of alloy melt and hydrogen reaction, can not affect hydrogen for the change of titanium aluminium base alloy melt and graphite casting mould interfacial reaction.
Technique of the present invention is simple, energy consumption and cost all lower, be easy to realize aborning, effectively reduced the interfacial reaction of titanium aluminium base alloy melt and graphite casting mould, be applicable to the melting modes such as common non-consumable electric arc melting and cold-crucible induction melting.
Accompanying drawing explanation
Fig. 1 is the phosphorus content impact of hydrogen partial pressure on reaction place of titanium aluminium base alloy sample interface.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is further described.
Embodiment 1:
Non-white consumption arc-melting furnace is evacuated to 5 * 10-3Pa, then passes into argon gas, wherein the dividing potential drop of argon gas is 5kPa, and the purity of argon gas is 99.999%.
Titanium aluminium base alloy melt is through four meltings: the raw material that utilizes for the first time 250g titanium sponge and 125g fine aluminium to form carries out melting, treats that titanium aluminium base alloy melt cooling becomes alloy cast ingot; After described alloy cast ingot upset, carry out melting for the second time, treat that titanium aluminium base alloy melt cooling becomes secondary alloy ingot casting; After described alloy cast ingot upset, carry out melting for the third time, treat that titanium aluminium base alloy melt cooling becomes alloy cast ingot three times; After described three alloy cast ingots upset, carry out again the 4th melting, obtain the uniform titanium aluminium base alloy melt to be cast of composition, then resulting titanium aluminium base alloy melt to be cast is directly poured in graphite casting mould, each melting progressively improves arc current, maximum arc current is 1300A, and smelting time is 2 minutes.
Melting finishes and disconnects after arc current, directly resulting titanium aluminium base alloy melt is poured in graphite casting mould, obtains the titanium-aluminium alloy sample of smelting and pouring under argon atmosphere, with taking out sample after the cooling certain hour of stove.
Embodiment 2:
Non-white consumption arc-melting furnace alloy smelting furnace is evacuated to 5 * 10-3Pa, then passes into hydrogen, pass into argon gas after passing into hydrogen, wherein the dividing potential drop of hydrogen is 5kPa, and partial pressure of ar gas is 5kPa, and the purity of argon gas is 99.999%.
Titanium aluminium base alloy melt is through four meltings: the raw material that utilizes for the first time 250g titanium sponge and 125g fine aluminium to form carries out melting, treats that titanium aluminium base alloy melt cooling becomes alloy cast ingot; After described alloy cast ingot upset, carry out melting for the second time, treat that titanium aluminium base alloy melt cooling becomes secondary alloy ingot casting; After described alloy cast ingot upset, carry out melting for the third time, treat that titanium aluminium base alloy melt cooling becomes alloy cast ingot three times; After described three alloy cast ingots upset, then carry out the 4th melting, obtain the uniform titanium aluminium base alloy melt to be cast of composition and the degree of superheat, then resulting titanium aluminium base alloy melt to be cast is directly poured in graphite casting mould.Each melting progressively improves arc current, and maximum arc current is 1300A, and smelting time is 2 minutes.
Melting finishes and disconnects after arc current, directly resulting titanium aluminium base alloy melt is poured in graphite casting mould, obtains the titanium-aluminium alloy sample of smelting and pouring under hydrogen and argon atmosphere, with taking out sample after the cooling certain hour of stove.
Embodiment 3:
It comprises molten alloy step and passes into hydrogen step:
Molten alloy step: in cold-crucible induction melting furnace, be evacuated to 6 * 10-3Pa, then directly start melting titanium aluminium base alloy, the raw material of melting is 250g titanium sponge and 125g fine aluminium.After raw material melts completely, be incubated 5 minutes, obtain the uniform titanium aluminium base alloy melt of composition and the degree of superheat.
Pass into hydrogen step: cold-crucible induction melting furnace is evacuated to 6 * 10-3Pa again, then pass into hydrogen, the titanium aluminium base alloy melt obtaining is continued to melting, make hydrogen and the effect of titanium aluminium base alloy melt, the dividing potential drop that passes into hydrogen is 10kPa, passing into smelting time after hydrogen is 2 minutes, then by resulting titanium aluminium base alloy melt cast in graphite casting mould.
Melting finishes and closes after electromagnetic induction power supply, directly resulting titanium aluminium base alloy melt is poured in graphite casting mould, obtains the titanium-aluminium alloy sample of smelting and pouring under atmosphere of hydrogen, with taking out sample after the cooling certain hour of stove.
Embodiment 4:
It comprises molten alloy step and passes into hydrogen step:
Molten alloy step: in non-consumable arc-melting furnace, be evacuated to 6 * 10-3Pa, pass into argon gas and start melting titanium aluminium base alloy, wherein the dividing potential drop of argon gas is 5kPa, and the purity of argon gas is 99.999%.
Titanium aluminium base alloy melt is through three meltings: the raw material that utilizes for the first time 250g titanium sponge and 125g fine aluminium to form carries out melting, treats that titanium aluminium base alloy melt cooling becomes alloy cast ingot; After described alloy cast ingot upset, carry out melting for the second time, treat that titanium aluminium base alloy melt cooling becomes secondary alloy ingot casting; After described secondary alloy ingot overturning, then carry out melting for the third time, obtain the uniform titanium aluminium base alloy melt of composition and the degree of superheat.Each melting progressively improves arc current, and maximum arc current is 1300A, and smelting time is 2 minutes.
Pass into hydrogen step: non-white power consumption arc alloy smelting furnace is evacuated to 6 * 10-3Pa again, then pass into hydrogen, the titanium aluminium base alloy melt obtaining is continued to melting, make hydrogen and the effect of titanium aluminium base alloy melt, passing into hydrogen partial pressure is 15kPa, passing into smelting time after hydrogen is 2 minutes, then by resulting titanium aluminium base alloy melt cast in graphite casting mould.
Melting finishes and disconnects after arc current, directly resulting titanium aluminium base alloy melt is poured in graphite casting mould, obtains the titanium-aluminium alloy sample of smelting and pouring under atmosphere of hydrogen, with taking out sample after the cooling certain hour of stove.
In embodiment 4, by controlling the size that passes into hydrogen partial pressure in smelting and pouring process, obtain the titanium-aluminium alloy sample that Hydrogen Vapor Pressure is respectively 5kPa (sequence number 1), 10kPa (sequence number 2), 15kPa (sequence number 3); As a comparison case, in embodiment 4, pass in hydrogen step and do not pass into hydrogen, obtain the titanium-aluminium alloy sample of pouring into a mould under no hydrogen condition.
The phosphorus content at the titanium-aluminium alloy sample interface place of 4 kinds of different hydrogen dividing potential drops is as shown in table 1.
The phosphorus content (mass percent) at the titanium-aluminium alloy sample interface place of table 1 different hydrogen dividing potential drop
| Sequence number | Hydrogen partial pressure/kPa | Phosphorus content/% |
| Comparative example | 0 | 13.59 |
| 1 | 5 | 13.04 |
| 2 | 10 | 9.97 |
| 3 | 15 | 6.19 |
Fig. 1 is the phosphorus content influence curve figure of hydrogen partial pressure to titanium-aluminium alloy sample interface place.Under the same cases such as consumption of pouring temperature, mold temperature and titanium aluminum binary alloy, by changing the dividing potential drop that passes into hydrogen in smelting and pouring process, obtaining respectively hydrogen partial pressure is the titanium-aluminium alloy sample of 0kPa, 5kPa, 10kPa, 15kPa.By the variation of different-alloy sample interface phosphorus content in comparison diagram 1, can find out, along with the increase of hydrogen partial pressure, the interfacial reaction of titanium aluminum binary alloy progressively weakens.Wherein, when hydrogen partial pressure is 15kPa, the mass percent of sample interface place phosphorus content is only 6.19%, and under no hydrogen atmosphere, the titanium-aluminium alloy interface phosphorus content of melting is 13.59%, has reduced by 54.45%.Show to pass into hydrogen in the process of melting titanium aluminium base alloy, can obviously reduce the interfacial reaction of titanium aluminium base alloy melt and graphite casting mould.
Claims (6)
1. a method that reduces titanium aluminium base alloy melt and graphite casting mould interfacial reaction, is characterized in that:
In the fusion process of titanium aluminium base alloy, pass into hydrogen, the dividing potential drop that passes into hydrogen is not less than 5kPa, and hydrogen and titanium aluminium base alloy melt are no less than 2 minutes action time, then by resulting titanium aluminium base alloy melt cast in graphite casting mould.
2. the method for reduction titanium aluminium base alloy melt as claimed in claim 1 and graphite casting mould interfacial reaction, is characterized in that:
After alloy smelting furnace vacuumizes, pass into hydrogen, the required titanium aluminium base alloy of raw material melting being formed by elemental metals and intermediate alloy, then by resulting titanium aluminium base alloy melt cast in graphite casting mould.
3. the method for reduction titanium aluminium base alloy melt as claimed in claim 2 and graphite casting mould interfacial reaction, is characterized in that:
When passing into hydrogen, pass into argon gas, the pressure that passes into argon gas is Hydrogen Vapor Pressure 1～2 times, the purity of argon gas is 99.999%.
4. the method for reduction titanium aluminium base alloy melt as claimed in claim 1 and graphite casting mould interfacial reaction, is characterized in that, it comprises molten alloy step and cast step:
Molten alloy step: in alloy smelting furnace, after vacuumizing, pass into argon gas or directly start melting titanium aluminium base alloy, obtaining titanium aluminium base alloy melt;
Cast step: alloy smelting furnace vacuumizes again, then passes into hydrogen, continues melting to the titanium aluminium base alloy melt that obtains, makes hydrogen and the effect of titanium aluminium base alloy melt, then by resulting titanium aluminium base alloy melt cast in graphite casting mould.
5. the method for reduction titanium aluminium base alloy melt as claimed in claim 4 and graphite casting mould interfacial reaction, is characterized in that:
In described molten alloy step, when described alloy smelting furnace is non-consumable arc-melting furnace, pass into argon gas as protection gas, titanium aluminium base alloy melt is through three meltings: utilize for the first time the raw material being comprised of elemental metals and intermediate alloy to carry out melting, treat that titanium aluminium base alloy melt cooling becomes alloy cast ingot; After described alloy cast ingot upset, carry out melting for the second time, treat that titanium aluminium base alloy melt cooling becomes secondary alloy ingot casting; After described secondary alloy ingot overturning, then carry out melting for the third time, obtain the uniform titanium aluminium base alloy melt of composition.
6. the method for reduction titanium aluminium base alloy melt as claimed in claim 4 and graphite casting mould interfacial reaction, is characterized in that:
In described cast step, when passing into hydrogen, pass into argon gas, the pressure that passes into argon gas is Hydrogen Vapor Pressure 1～2 times, the purity of argon gas is 99.999%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310753716.4A CN103736978A (en) | 2013-12-31 | 2013-12-31 | Method for reducing interfacial reaction of titanium aluminum base alloy melt and graphite casting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310753716.4A CN103736978A (en) | 2013-12-31 | 2013-12-31 | Method for reducing interfacial reaction of titanium aluminum base alloy melt and graphite casting mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103736978A true CN103736978A (en) | 2014-04-23 |
Family
ID=50494085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310753716.4A Pending CN103736978A (en) | 2013-12-31 | 2013-12-31 | Method for reducing interfacial reaction of titanium aluminum base alloy melt and graphite casting mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103736978A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113996759A (en) * | 2021-10-29 | 2022-02-01 | 华中科技大学 | Aluminum lithium alloy casting adopting shell to inhibit interface reaction and casting method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62176664A (en) * | 1986-01-28 | 1987-08-03 | Morita Mfg Co Ltd | Casting method for pure titanium or alloy essentially consisting of titanium |
| CN102921928A (en) * | 2012-10-26 | 2013-02-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for producing titanium or titanium alloy castings by using titanium sponges |
-
2013
- 2013-12-31 CN CN201310753716.4A patent/CN103736978A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62176664A (en) * | 1986-01-28 | 1987-08-03 | Morita Mfg Co Ltd | Casting method for pure titanium or alloy essentially consisting of titanium |
| CN102921928A (en) * | 2012-10-26 | 2013-02-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for producing titanium or titanium alloy castings by using titanium sponges |
Non-Patent Citations (4)
| Title |
|---|
| KOUJI MIMURA等: ""Purification of chromium by hydrogen plasma-arc zone melting"", 《MATERIALS SCIENCE AND ENGINEERING A》 * |
| YANQING SU等: ""Hydrogen solubility in molten TiAl alloys"", 《INTERNATIONAL JOURNAL OF HYDROGEN ENERGY》 * |
| 刘鑫旺等: ""氢对TiAl 合金熔体与石墨铸型界面反应的影响"", 《2013 中国铸造活动周论文集》 * |
| 罗文忠等: ""TiAl合金定向凝固过程中与坩埚材料的界面反应研究"", 《稀有金属材料与工程》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113996759A (en) * | 2021-10-29 | 2022-02-01 | 华中科技大学 | Aluminum lithium alloy casting adopting shell to inhibit interface reaction and casting method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108546834B (en) | Purification smelting method for nickel-based high-temperature alloy master alloy | |
| CN100519813C (en) | High-strength toughness cold working die steel and method of producing the same | |
| CN109371271B (en) | Non-vacuum smelting and continuous casting process for copper-iron alloy | |
| CN103122431B (en) | Preparation method for magnesium-lithium alloy with enhanced long-period structure phase | |
| CN109161697B (en) | Method for controlling non-metallic inclusions in powder metallurgy high-temperature alloy master alloy | |
| CN101343705A (en) | Titanium alloy for high-rigidity cast and manufacturing method | |
| CN112226651B (en) | Alloy material for deformed turbine disc at 850 ℃ and preparation process | |
| CN104745872A (en) | High-temperature titanium alloy applicable to use at temperature of 650 DEG C and preparation method thereof | |
| CN102554192B (en) | Manufacturing method of highly-conductive and heat-resisting electrode cross beam component | |
| CN103526037A (en) | Method for purified smelting of high-temperature alloy by using yttrium oxide crucible | |
| CN103498075A (en) | Preparation method of deformation-resistant high-temperature alloy and deformation-resistant high-temperature alloy part | |
| CN104498804A (en) | Preparation method of high-temperature alloy and high-temperature alloy thereof | |
| CN104388756B (en) | A kind of nickel-base alloy and preparation method thereof | |
| CN103938058A (en) | Method for preparing nickel/chromium/iron multi-component high-resistance electrothermal alloy strip | |
| CN103938002B (en) | A kind of Cu-Cr-Zr alloy casting rod reduces the vacuum melting technique of segregation | |
| CN102818454A (en) | Composite crucible with advantages of energy saving, low cost and capability of being alloyed | |
| CN103498063A (en) | Method for performing purified smelting on high-temperature alloy return material by using yttrium oxide crucible | |
| CN103509958A (en) | Method for smelting titanium aluminum base alloy | |
| CN104152809B (en) | A kind of alloy plug | |
| CN104593612A (en) | Method for purifying magnesium melt by utilizing temperature gradient | |
| CN103736978A (en) | Method for reducing interfacial reaction of titanium aluminum base alloy melt and graphite casting mold | |
| CN108165780B (en) | Preparation method of Ni-Cr-Al-Fe high-temperature alloy | |
| CN109097626A (en) | A kind of metastable β Titanium-alloy with high damping characteristic and aging stability | |
| CN104294130A (en) | Self-lubricating damping alloy and preparation method thereof | |
| CN103572082A (en) | High Nb-TiAl alloy and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140423 |
|
| RJ01 | Rejection of invention patent application after publication |