CN104928531B - A kind of homogenization TiAl alloy lamellar microstructure and preparation method thereof - Google Patents
A kind of homogenization TiAl alloy lamellar microstructure and preparation method thereof Download PDFInfo
- Publication number
- CN104928531B CN104928531B CN201510239382.8A CN201510239382A CN104928531B CN 104928531 B CN104928531 B CN 104928531B CN 201510239382 A CN201510239382 A CN 201510239382A CN 104928531 B CN104928531 B CN 104928531B
- Authority
- CN
- China
- Prior art keywords
- alloy
- tial alloy
- homogenization
- grade
- smelting furnace
- 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.)
- Expired - Fee Related
Links
Abstract
A kind of homogenization TiAl alloy lamellar microstructure and preparation method thereof, it is related to a kind of TiAl alloy and preparation method thereof.The invention aims to solving the problems, such as that the elements such as the poor and independent boron of existing TiAl alloy plasticity, carbon refinement as-cast state TiAl alloy structure causes TiAl alloy performance bad.A kind of homogenization TiAl alloy lamellar microstructure is made up of 43%～48%Al, 0%～2%Cr, 0%～2%Nb, 0.5%～1%B, 0.1%～1%C and surplus Ti by weight percentage；The comprcssive strength of described homogenization TiAl alloy lamellar microstructure is 1687MPa～2370MPa, and compression ratio is 23%～32%.Preparation method：First, weighing；2nd, knead, homogenization TiAl alloy lamellar microstructure.The present invention can obtain a kind of method of homogenization TiAl alloy lamellar microstructure.
Description
Technical field
The present invention relates to a kind of TiAl alloy and preparation method thereof.
Background technology
TiAl alloy, as a kind of high-temperature structural material, has high-melting-point, low-density, high elastic modulus and preferably high
The advantages of warm intensity, fire retardancy, non-oxidizability, future can be widely applied to the fields such as Aero-Space, navigation.But its room temperature
Plasticity difference hinders the extensive application of TiAl alloy, adopts the elements such as boron, carbon refinement as-cast state TiAl alloy structure at present to reach more
To the purpose improving its temperature-room type plasticity.And the addition of boron can suffer from the drawback that：First, can assemble during alloy melting
Phenomenon, most of boron separates out longer ribbon boride along crystal boundary, reduces the combination energy between crystal boundary, reduce alloy strength,
Plasticity；2nd, carbon room temperature solubility in TiAl alloy is less, and a small amount of addition meeting segregation in TiAl alloy forms bar-shaped
Carbide, increase tissue in stress concentration, reduce TiAl alloy intensity.So needing at present to introduce a kind of new boron, carbon
The feed postition of element, weakens and is individually added into boron, the harmful effect to alloy room-temperature property for the carbon, and can carry to a certain extent
High TiAl alloy serviceability at high temperature.
Content of the invention
The invention aims to solve the elements such as the poor and independent boron of existing TiAl alloy plasticity, carbon refinement as-cast state TiAl closing
Payment organization causes the bad problem of TiAl alloy performance, and provides a kind of homogenization TiAl alloy lamellar microstructure and its preparation side
Method.
A kind of homogenization TiAl alloy lamellar microstructure by weight percentage by 43%～48%Al, 0%～2%Cr, 0%～
2%Nb, 0.5%～1%B, 0.1%～1%C and surplus Ti composition；The resistance to compression of described homogenization TiAl alloy lamellar microstructure
Intensity is 1687MPa～2370MPa, and compression ratio is 23%～32%.
A kind of preparation method of homogenization TiAl alloy lamellar microstructure, is carried out according to the following steps：
First, weighing：By each element percentage by weight Al：43%～48%, Cr：0%～2%, Nb：0%～2%, B：
0.5%～1%, C：0.1%～1% and surplus Ti, weigh aluminium ingot, aluminum niobium intermediate alloy, chromium powder, 0 grade of titanium sponge, boracic respectively
Raw material and containing carbon source materials be raw material；
2nd, knead：
When the Cr element weight percent weighing in step one is also 0% for 0%, Nb element weight percent specifically
Carry out according to the following steps：
The aluminium ingot weighing in step one is cut into and is smaller in size than 10cm3Aluminium block；Again by weigh in step one 0 grade of sea
Continuous titanium is added in the copper crucible of smelting furnace；10cm will be smaller in size than again3Aluminium block be placed on 0 grade of titanium sponge；Again by step one
In the boracic raw material that weighs and being added in the secondary charging bucket of smelting furnace containing carbon source materials, smelting furnace is evacuated to
Vacuum reaches 10-3Mbar, then with speed as 10kW/min～20kW/min load power to 200kW～300kW, melting
Mixing material to copper crucible is melted completely, obtains alloy melt；Then by the boracic raw material in secondary charging bucket with contain
Carbon source materials are added in alloy melt, are heated to alloy melting, and are incubated 15min～20min at a temperature of alloy melting, obtain
To TiAl alloy melt；Then copper crucible is overturn, then TiAl alloy melt is poured into the steel that temperature is 400 DEG C～600 DEG C
In mould, after 1min, into smelting furnace body, it is filled with argon, then blow-on, then naturally cool to room temperature, obtain homogenization TiAl and close
Golden lamellar microstructure；
When the Cr element weight percent weighing in step one is not 0% for 0%, Nb element weight percent specifically
Carry out according to the following steps：
The aluminium ingot weighing in step one is cut into and is smaller in size than 10cm3Aluminium block；Again by weigh in step one 0 grade of sea
Continuous titanium is divided into two parts, and 0 grade of titanium sponge of a copy of it is added in the copper crucible of smelting furnace；To weigh in step one again
Aluminum niobium intermediate alloy is laid in above 0 grade of titanium sponge in the copper crucible of smelting furnace；Add another again into the copper crucible of smelting furnace
0 grade of titanium sponge of part, then 10cm will be smaller in size than3Aluminium block be placed on 0 grade of titanium sponge；Again by the boracic weighing in step one former material
Material and being added in the secondary charging bucket of smelting furnace containing carbon source materials, carries out to smelting furnace being evacuated to vacuum and reaches 10- 3Mbar, then with speed as 10kW/min～20kW/min loads power to 200kW～300kW, mixed in melting to copper crucible
Condensation material melts completely, obtains alloy melt；Then it is added to by the boracic raw material in secondary charging bucket with containing carbon source materials
In alloy melt, it is heated to alloy melting, and is incubated 15min～20min at a temperature of alloy melting, obtain TiAl alloy and melt
Body；Then copper crucible is overturn, then TiAl alloy melt is poured in the steel mold that temperature is 400 DEG C～600 DEG C, after 1min
It is filled with argon into smelting furnace body, then blow-on, then naturally cool to room temperature, obtain homogenization TiAl alloy lamellar microstructure；
When the Cr element weight percent weighing in step one be not 0%, Nb element weight percent be 0% when specifically
Carry out according to the following steps：
The aluminium ingot weighing in step one is cut into and is smaller in size than 10cm3Aluminium block；Again by weigh in step one 0 grade of sea
Continuous titanium is divided into two parts, and 0 grade of titanium sponge of a copy of it is added in the copper crucible of smelting furnace；To weigh in step one again
Chromium powder is laid in above 0 grade of titanium sponge in the copper crucible of smelting furnace；Another 0 grade of sponge is added again into the copper crucible of smelting furnace
Titanium, then 10cm will be smaller in size than3Aluminium block be placed on 0 grade of titanium sponge；Again by the boracic weighing in step one raw material and carbon containing
Raw material is added in the secondary charging bucket of smelting furnace, smelting furnace is carried out be evacuated to vacuum and reaches 10-3Mbar, then with
Speed is that 10kW/min～20kW/min loads power to 200kW～300kW, and the mixing material in melting to copper crucible is melted completely
Change, obtain alloy melt；Then it is added in alloy melt by the boracic raw material in secondary charging bucket with containing carbon source materials, plus
Heat is to alloy melting, and is incubated 15min～20min at a temperature of alloy melting, obtains TiAl alloy melt；Then by copper crucible
Upset, then TiAl alloy melt is poured in the steel mold that temperature is 400 DEG C～600 DEG C, fill into smelting furnace body after 1min
Enter argon, then blow-on, then naturally cool to room temperature, obtain homogenization TiAl alloy lamellar microstructure；
When the Cr element weight percent weighing in step one be not when 0%, Nb element weight percent is not 0% concrete
Carry out according to the following steps：
The aluminium ingot weighing in step one is cut into and is smaller in size than 10cm3Aluminium block；Again by weigh in step one 0 grade of sea
Continuous titanium is divided into two parts, and 0 grade of titanium sponge of a copy of it is added in the copper crucible of smelting furnace；To weigh in step one again
Chromium powder and aluminum niobium intermediate alloy mix homogeneously, then the copper earthenware chromium powder of mix homogeneously and aluminum niobium intermediate alloy being laid in smelting furnace
Above 0 grade of titanium sponge in crucible；Add another 0 grade of titanium sponge again into the copper crucible of smelting furnace, then 10cm will be smaller in size than3's
Aluminium block is placed on 0 grade of titanium sponge；It is added to the two of smelting furnace again by the boracic weighing in step one raw material with containing carbon source materials
In secondary loading hopper, smelting furnace is carried out be evacuated to vacuum and reach 10-3Mbar, then with speed as 10kW/min～20kW/
Min loads power to 200kW～300kW, and the mixing material in melting to copper crucible is melted completely, obtains alloy melt；Then
It is added in alloy melt by the boracic raw material in secondary charging bucket with containing carbon source materials, is heated to alloy melting, and closing
It is incubated 15min～20min under golden fusion temperature, obtain TiAl alloy melt；Then copper crucible is overturn, then TiAl alloy is melted
Body pours in the steel mold that temperature is 400 DEG C～600 DEG C, is filled with argon after 1min into smelting furnace body, then blow-on, then from
So it is cooled to room temperature, obtain homogenization TiAl alloy lamellar microstructure.
Advantages of the present invention：
First, present invention employs a kind of new method boron element and carbon are added in TiAl alloy, to optimize
TiAl alloy structure property, is that the practical application of alloy is provided fundamental basis；
2nd, it is uniformly distributed boride, carbide etc. second in the TiAl alloy lamellar microstructure of homogenization of present invention preparation
Phase；The microscopic structure of uniform small grains in TiAl alloy lamellar microstructure, improves the serviceability of TiAl alloy, increases TiAl
The utilization rate of alloy, reduces the machining cost before cast alloy application；
3rd, the present invention is obtained in that more uniform microscopic structure, and carbide, boride are tiny, in grain boundaries and layer
It is uniformly distributed between piece, concentrate precipitation to weaken in grain boundaries, reduce the possibility that crackle extends in crystal boundary, improve alloy serviceability；
4th, the present invention preparation the TiAl alloy lamellar microstructure of homogenization comprcssive strength be 1687MPa～
2370MPa, compression ratio is 23%～32%.
The present invention can obtain a kind of method of homogenization TiAl alloy lamellar microstructure.
Brief description
Fig. 1 is the SEM figure of 500 times of the Ti-48Al alloy lamellar microstructure amplification of embodiment one preparation；
Fig. 2 is the SEM figure of 1000 times of the Ti-48Al-0.8B-0.2C alloy lamellar microstructure amplification of embodiment two preparation；
Fig. 3 is the Ti-48Al-0.2B of embodiment three preparation4C alloy lamellar microstructure amplifies 2000 times of SEM figure；
Fig. 4 amplifies 1000 times of SEM figure for Ti-48Al-2Cr-2Nb alloy lamellar microstructure prepared by example IV；
Fig. 5 is the Ti-48Al-2Cr-2Nb-0.4B of embodiment five preparation4C alloy lamellar microstructure amplifies 1000 times of SEM
Figure.
Specific embodiment
Specific embodiment one：Present embodiment be a kind of homogenization TiAl alloy lamellar microstructure by weight percentage by
43%～48%Al, 0%～2%Cr, 0%～2%Nb, 0.5%～1%B, 0.1%～1%C and surplus Ti composition；Described
The comprcssive strength of homogenization TiAl alloy lamellar microstructure is 1687MPa～2370MPa, and compression ratio is 23%～32%.
The advantage of present embodiment：
First, present embodiment employs a kind of new method and boron element and carbon is added in TiAl alloy, with excellent
Change TiAl alloy structure property, be that the practical application of alloy is provided fundamental basis；
2nd, it is uniformly distributed boride, carbide etc. in the TiAl alloy lamellar microstructure of homogenization of present embodiment preparation
Second phase；The microscopic structure of uniform small grains in TiAl alloy lamellar microstructure, improves the serviceability of TiAl alloy, increases
The utilization rate of TiAl alloy, reduces the machining cost before cast alloy application；
3rd, present embodiment is obtained in that more uniform microscopic structure, and carbide, boride are tiny, in grain boundaries
And be uniformly distributed between synusia, concentrate precipitation to weaken in grain boundaries, reduce the possibility that crackle extends in crystal boundary, improve alloy usability
Energy；
4th, present embodiment preparation the TiAl alloy lamellar microstructure of homogenization comprcssive strength be 2130MPa～
2140MPa, compression ratio is 30%～32%.
Present embodiment can obtain a kind of method of homogenization TiAl alloy lamellar microstructure.
Specific embodiment two：Present embodiment be a kind of preparation method of homogenization TiAl alloy lamellar microstructure be by with
Lower step is carried out：
First, weighing：By each element percentage by weight Al：43%～48%, Cr：0%～2%, Nb：0%～2%, B：
0.5%～1%, C：0.1%～1% and surplus Ti, weigh aluminium ingot, aluminum niobium intermediate alloy, chromium powder, 0 grade of titanium sponge, boracic respectively
Raw material and containing carbon source materials be raw material；
2nd, knead：
When the Cr element weight percent weighing in step one is also 0% for 0%, Nb element weight percent specifically
Carry out according to the following steps：
The aluminium ingot weighing in step one is cut into and is smaller in size than 10cm3Aluminium block；Again by weigh in step one 0 grade of sea
Continuous titanium is added in the copper crucible of smelting furnace；10cm will be smaller in size than again3Aluminium block be placed on 0 grade of titanium sponge；Again by step one
In the boracic raw material that weighs and being added in the secondary charging bucket of smelting furnace containing carbon source materials, smelting furnace is evacuated to
Vacuum reaches 10-3Mbar, then with speed as 10kW/min～20kW/min load power to 200kW～300kW, melting is extremely
Mixing material in copper crucible is melted completely, obtains alloy melt；Then by the boracic raw material in secondary charging bucket and carbon containing
Raw material is added in alloy melt, is heated to alloy melting, and is incubated 15min～20min at a temperature of alloy melting, obtains
TiAl alloy melt；Then copper crucible is overturn, then TiAl alloy melt is poured into the punching block that temperature is 400 DEG C～600 DEG C
In tool, after 1min, into smelting furnace body, it is filled with argon, then blow-on, then naturally cool to room temperature, obtain homogenization TiAl alloy
Lamellar microstructure；
When the Cr element weight percent weighing in step one is not 0% for 0%, Nb element weight percent specifically
Carry out according to the following steps：
The aluminium ingot weighing in step one is cut into and is smaller in size than 10cm3Aluminium block；Again by weigh in step one 0 grade of sea
Continuous titanium is divided into two parts, and 0 grade of titanium sponge of a copy of it is added in the copper crucible of smelting furnace；To weigh in step one again
Aluminum niobium intermediate alloy is laid in above 0 grade of titanium sponge in the copper crucible of smelting furnace；Add another again into the copper crucible of smelting furnace
0 grade of titanium sponge of part, then 10cm will be smaller in size than3Aluminium block be placed on 0 grade of titanium sponge；Again by the boracic weighing in step one former material
Material and being added in the secondary charging bucket of smelting furnace containing carbon source materials, carries out to smelting furnace being evacuated to vacuum and reaches 10- 3Mbar, then with speed as 10kW/min～20kW/min loads power to 200kW～300kW, mixed in melting to copper crucible
Condensation material melts completely, obtains alloy melt；Then it is added to by the boracic raw material in secondary charging bucket with containing carbon source materials
In alloy melt, it is heated to alloy melting, and is incubated 15min～20min at a temperature of alloy melting, obtain TiAl alloy and melt
Body；Then copper crucible is overturn, then TiAl alloy melt is poured in the steel mold that temperature is 400 DEG C～600 DEG C, after 1min
It is filled with argon into smelting furnace body, then blow-on, then naturally cool to room temperature, obtain homogenization TiAl alloy lamellar microstructure；
When the Cr element weight percent weighing in step one be not 0%, Nb element weight percent be 0% when specifically
Carry out according to the following steps：
The aluminium ingot weighing in step one is cut into and is smaller in size than 10cm3Aluminium block；Again by weigh in step one 0 grade of sea
Continuous titanium is divided into two parts, and 0 grade of titanium sponge of a copy of it is added in the copper crucible of smelting furnace；To weigh in step one again
Chromium powder is laid in above 0 grade of titanium sponge in the copper crucible of smelting furnace；Another 0 grade of sponge is added again into the copper crucible of smelting furnace
Titanium, then 10cm will be smaller in size than3Aluminium block be placed on 0 grade of titanium sponge；Again by the boracic weighing in step one raw material and carbon containing
Raw material is added in the secondary charging bucket of smelting furnace, smelting furnace is carried out be evacuated to vacuum and reaches 10-3Mbar, then with
Speed is that 10kW/min～20kW/min loads power to 200kW～300kW, and the mixing material in melting to copper crucible is melted completely
Change, obtain alloy melt；Then it is added in alloy melt by the boracic raw material in secondary charging bucket with containing carbon source materials, plus
Heat is to alloy melting, and is incubated 15min～20min at a temperature of alloy melting, obtains TiAl alloy melt；Then by copper crucible
Upset, then TiAl alloy melt is poured in the steel mold that temperature is 400 DEG C～600 DEG C, fill into smelting furnace body after 1min
Enter argon, then blow-on, then naturally cool to room temperature, obtain homogenization TiAl alloy lamellar microstructure；
When the Cr element weight percent weighing in step one be not when 0%, Nb element weight percent is not 0% concrete
Carry out according to the following steps：
The aluminium ingot weighing in step one is cut into and is smaller in size than 10cm3Aluminium block；Again by weigh in step one 0 grade of sea
Continuous titanium is divided into two parts, and 0 grade of titanium sponge of a copy of it is added in the copper crucible of smelting furnace；To weigh in step one again
Chromium powder and aluminum niobium intermediate alloy mix homogeneously, then the copper earthenware chromium powder of mix homogeneously and aluminum niobium intermediate alloy being laid in smelting furnace
Above 0 grade of titanium sponge in crucible；Add another 0 grade of titanium sponge again into the copper crucible of smelting furnace, then 10cm will be smaller in size than3's
Aluminium block is placed on 0 grade of titanium sponge；It is added to the two of smelting furnace again by the boracic weighing in step one raw material with containing carbon source materials
In secondary loading hopper, smelting furnace is carried out be evacuated to vacuum and reach 10-3Mbar, then with speed as 10kW/min～20kW/
Min loads power to 200kW～300kW, and the mixing material in melting to copper crucible is melted completely, obtains alloy melt；Then
It is added in alloy melt by the boracic raw material in secondary charging bucket with containing carbon source materials, is heated to alloy melting, and closing
It is incubated 15min～20min under golden fusion temperature, obtain TiAl alloy melt；Then copper crucible is overturn, then TiAl alloy is melted
Body pours in the steel mold that temperature is 400 DEG C～600 DEG C, is filled with argon after 1min into smelting furnace body, then blow-on, then from
So it is cooled to room temperature, obtain homogenization TiAl alloy lamellar microstructure.
The advantage of present embodiment：
First, present embodiment employs a kind of new method and boron element and carbon is added in TiAl alloy, with excellent
Change TiAl alloy structure property, be that the practical application of alloy is provided fundamental basis；
2nd, it is uniformly distributed boride, carbide etc. in the TiAl alloy lamellar microstructure of homogenization of present embodiment preparation
Second phase；The microscopic structure of uniform small grains in TiAl alloy lamellar microstructure, improves the serviceability of TiAl alloy, increases
The utilization rate of TiAl alloy, reduces the machining cost before cast alloy application；
3rd, present embodiment is obtained in that more uniform microscopic structure, and carbide, boride are tiny, in grain boundaries
And be uniformly distributed between synusia, concentrate precipitation to weaken in grain boundaries, reduce the possibility that crackle extends in crystal boundary, improve alloy usability
Energy；
4th, present embodiment preparation the TiAl alloy lamellar microstructure of homogenization comprcssive strength be 1687MPa～
2370MPa, compression ratio is 23%～32%.
Present embodiment can obtain a kind of method of homogenization TiAl alloy lamellar microstructure.
Specific embodiment three：The difference from specific embodiment two for the present embodiment is：Containing described in step 2
Boron raw material is boron powder, TiB2Powder or B4C powder.Other are identical with specific embodiment two.
Specific embodiment four：The difference from specific embodiment two or three for the present embodiment is：Described in step 2
Containing carbon source materials be carbon dust, TiC powder or B4C powder.Other are identical with specific embodiment two or three.
Specific embodiment five：The difference from specific embodiment two to four for the present embodiment is：Described in step
0 grade of titanium sponge purity 99.9wt.%, the purity ＞ 99.99wt.% of aluminium ingot, the purity ＞ 99.9wt.% of chromium powder, aluminum niobium
In intermediate alloy, Nb mass fraction is 50%～60%.Other are identical with specific embodiment two to four.
Specific embodiment six：The difference from specific embodiment two to five for the present embodiment is：Described in step
The particle diameter of aluminum niobium intermediate alloy be less than 5mm, the particle diameter of chromium powder is less than 5mm, and the particle diameter of 0 grade of titanium sponge is less than 10mm.Other with
Specific embodiment two to five is identical.
Specific embodiment seven：The difference from specific embodiment two to six for the present embodiment is：Described boron powder
Particle diameter is less than 50 μm, TiB2The particle diameter of powder is less than 50 μm, B4The particle diameter of C powder is less than 50 μm.Other are with specific embodiment two to six
Identical.
Specific embodiment eight：The difference from specific embodiment two to seven for the present embodiment is：Described carbon dust
Particle diameter is less than 50 μm, and the particle diameter of TiC powder is less than 50 μm, B4The particle diameter of C powder is less than 50 μm.Other are with specific embodiment two to seven
Identical.
Specific embodiment nine：The difference from specific embodiment two to eight for the present embodiment is：Press each in step one
Element weight percent Al：48%th, B：0.8%th, C：0.2% and surplus Ti, weigh aluminium ingot, 0 grade of titanium sponge, boracic former material respectively
Expecting and contain carbon source materials is raw material.Other are identical with specific embodiment two to eight.
Specific embodiment ten：The difference from specific embodiment two to nine for the present embodiment is：Press each in step one
Element weight percent Al：48%th, Cr：2%th, Nb：2%th, B：0.8%th, C：0.2% and surplus Ti, weigh aluminium ingot, aluminum niobium respectively
Intermediate alloy, chromium powder, 0 grade of titanium sponge and boracic raw material and containing carbon source materials be raw material.Other with specific embodiment two to
Nine is identical.
Verify advantages of the present invention using following examples：
Embodiment one：A kind of the present embodiment homogenization TiAl alloy lamellar microstructure is by weight percentage by 48%Al and surplus
Ti forms；
A kind of preparation method of the present embodiment homogenization TiAl alloy lamellar microstructure is carried out according to the following steps：
First, weighing：By each element percentage by weight Al：48% and surplus Ti, it is former for weighing aluminium ingot and 0 grade of titanium sponge respectively
Material；
2nd, the aluminium ingot weighing in step one is cut into and be smaller in size than 10cm3Aluminium block；Again by weigh in step one 0
Level titanium sponge is added in the copper crucible of smelting furnace；10cm will be smaller in size than again3Aluminium block be placed on 0 grade of titanium sponge；Again to molten
Furnace carries out being evacuated to vacuum and reaches 10-3Mbar, then loads power to 300kW with speed for 15kW/min, melting is extremely
Mixing material in copper crucible is melted completely, then is incubated 20min under fusion temperature, obtains TiAl alloy melt；Then by copper
Crucible overturns, then TiAl alloy melt is poured in the steel mold that temperature is 500 DEG C, is filled with argon after 1min into smelting furnace body
Gas, then blow-on, then naturally cool to room temperature, obtain homogenization TiAl alloy lamellar microstructure；
Purity 99.9wt.% of 0 described in step one grade titanium sponge, the purity ＞ 99.99wt.% of aluminium ingot；
The particle diameter of 0 described in step one grade titanium sponge is less than 10mm.
The homogenization TiAl alloy lamellar microstructure tensile property of embodiment one preparation is tested, according to GB/T4338-
2006 standards, under room temperature, comprcssive strength is 1687.0MPa, and compression ratio is 23.5%.
Fig. 1 is the SEM figure of 500 times of the Ti-48Al alloy lamellar microstructure amplification of embodiment one preparation；From fig. 1, it can be seen that not having
Add B, the binary Ti-48Al alloy of C element crystallite dimension thicker, its crystallite dimension is far longer than 100 μm.
Embodiment two：A kind of the present embodiment homogenization TiAl alloy lamellar microstructure by weight percentage by 48%Al, 0.8%
B, 0.2%C and surplus Ti composition；
A kind of preparation method of the present embodiment homogenization TiAl alloy lamellar microstructure, is carried out according to the following steps：
First, weighing：By each element percentage by weight Al：48%th, B：0.8%th, C：0.2% and surplus Ti, weigh aluminum respectively
Ingot, 0 grade of titanium sponge, boracic raw material and be raw material containing carbon source materials；
2nd, the aluminium ingot weighing in step one is cut into and be smaller in size than 10cm3Aluminium block；Again by weigh in step one 0
Level titanium sponge is added in the copper crucible of smelting furnace；10cm will be smaller in size than again3Aluminium block be placed on 0 grade of titanium sponge；To walk again
The boracic raw material that weighs in rapid one and being added in the secondary charging bucket of smelting furnace containing carbon source materials, carries out taking out true to smelting furnace
Sky to vacuum reaches 10-3Mbar, then loads power to 300kW with speed for 15kW/min, mixed in melting to copper crucible
Condensation material melts completely, obtains alloy melt；Then it is added to by the boracic raw material in secondary charging bucket with containing carbon source materials
In alloy melt, it is heated to alloy melting, and is incubated 20min at a temperature of alloy melting, obtain TiAl alloy melt；Then will
Copper crucible overturns, then TiAl alloy melt is poured in the steel mold that temperature is 500 DEG C, is filled with after 1min into smelting furnace body
Argon, then blow-on, then naturally cool to room temperature, obtain homogenization TiAl alloy lamellar microstructure；
Boracic raw material described in step 2 is boron powder；The particle diameter of described boron powder is less than 50 μm；
Described in step 2 is carbon dust containing carbon source materials；The particle diameter of described carbon dust is less than 50 μm；
Purity 99.9wt.% of 0 described in step one grade titanium sponge, the purity ＞ 99.99wt.% of aluminium ingot；
The particle diameter of 0 described in step one grade titanium sponge is less than 10mm.
The homogenization TiAl alloy lamellar microstructure tensile property of embodiment two preparation is tested, according to GB/T4338-
2006 standards, under room temperature, comprcssive strength is 2130.3MPa, and compression ratio is 30.1%.
Fig. 2 is the SEM figure of 1000 times of the Ti-48Al-0.8B-0.2C alloy lamellar microstructure amplification of embodiment two preparation；From
Fig. 2 can be seen that after adding boron powder and carbon dust in binary Ti-48Al alloy, and its microscopic structure substantially refines, its crystallite dimension
It is about 50～100 μm.
Embodiment three：A kind of preparation method of homogenization TiAl alloy lamellar microstructure, is carried out according to the following steps：
First, weighing：By each element percentage by weight Al：8%th, B：0.8%th, C：0.2% and surplus Ti, weigh aluminum respectively
Ingot, 0 grade of titanium sponge, boracic raw material and be raw material containing carbon source materials；
2nd, the aluminium ingot weighing in step one is cut into and be smaller in size than 10cm3Aluminium block；Again by weigh in step one 0
Level titanium sponge is added in the copper crucible of smelting furnace；Another 0 grade of titanium sponge is added again into the copper crucible of smelting furnace, then by chi
Very little less than 10cm3Aluminium block be placed on 0 grade of titanium sponge；Add by the boracic weighing in step one raw material with containing carbon source materials again
To in the secondary charging bucket of smelting furnace, smelting furnace is carried out be evacuated to vacuum and reach 10-3Mbar, then with speed be
15kW/min loads power to 300kW, and the mixing material in melting to copper crucible is melted completely, obtains alloy melt；Then will
Boracic raw material in secondary charging bucket and being added in alloy melt containing carbon source materials, is heated to alloy melting, and in alloy
It is incubated 20min under fusion temperature, obtain TiAl alloy melt；Then copper crucible is overturn, then TiAl alloy melt is poured into
Temperature is in 500 DEG C of steel mold, is filled with argon after 1min into smelting furnace body, then blow-on, then naturally cools to room temperature, obtains
To homogenization TiAl alloy lamellar microstructure；
Boracic raw material described in step 2 is B4C powder；Described B4The particle diameter of C powder is less than 50 μm；
Described in step 2 is B containing carbon source materials4C powder；Described B4The particle diameter of C powder is less than 50 μm；
Purity 99.9wt.% of 0 described in step one grade titanium sponge, the purity ＞ 99.99wt.% of aluminium ingot；
The particle diameter of 0 described in step one grade titanium sponge is less than 10mm.
The homogenization TiAl alloy lamellar microstructure tensile property of embodiment three preparation is tested, according to GB/T 4338-
2006 standards, under room temperature, comprcssive strength is 1936.2MPa, and compression ratio is 26.1%
Fig. 3 is the Ti-48Al-0.2B of embodiment three preparation4C alloy lamellar microstructure amplifies 2000 times of SEM figure；From Fig. 3
Understand, in binary Ti-48Al alloy, add B4After C, its microscopic structure substantially refines, and its crystallite dimension is about 50 μm.
Example IV：A kind of preparation method of homogenization TiAl alloy lamellar microstructure, is carried out according to the following steps：
First, weighing：By each element percentage by weight Al：48%th, Cr：2%th, Nb：2% and surplus Ti, weigh aluminum respectively
Ingot, 0 grade of titanium sponge, boracic raw material and be raw material containing carbon source materials；
2nd, the aluminium ingot weighing in step one is cut into and be smaller in size than 10cm3Aluminium block；Again by weigh in step one 0
Level titanium sponge is added in the copper crucible of smelting furnace；Again by the chromium powder weighing in step one and aluminum niobium intermediate alloy mix homogeneously,
Again the chromium powder of mix homogeneously and aluminum niobium intermediate alloy are laid in above 0 grade of titanium sponge in the copper crucible of smelting furnace；Again to melting
Add another 0 grade of titanium sponge in the copper crucible of stove, then 10cm will be smaller in size than3Aluminium block be placed on 0 grade of titanium sponge；To melting
Stove carries out being evacuated to vacuum and reaches 10-3Mbar, then loads power to 300kW with speed for 15kW/min, melting is to copper
Mixing material in crucible is melted completely, obtains alloy melt；Then will be former to the boracic raw material in secondary charging bucket and carbon containing
Material is added in alloy melt, is heated to alloy melting, and is incubated 20min at a temperature of alloy melting, obtains TiAl alloy
Melt；Then copper crucible is overturn, then TiAl alloy melt is poured in the steel mold that temperature is 500 DEG C, 1min melts backward
It is filled with argon in furnace body, then blow-on, then naturally cools to room temperature, obtain homogenization TiAl alloy lamellar microstructure；
Purity 99.9wt.% of 0 described in step one grade titanium sponge, the purity ＞ 99.99wt.% of aluminium ingot；
The particle diameter of 0 described in step one grade titanium sponge is less than 10mm.
The homogenization TiAl alloy lamellar microstructure tensile property of example IV preparation is tested, according to GB/T4338-
2006 standards, under room temperature, comprcssive strength is 1857.0MPa, and compression ratio is 25.4%.
Fig. 4 amplifies 1000 times of SEM figure for Ti-48Al-2Cr-2Nb alloy lamellar microstructure prepared by example IV；No
Add the Ti-48Al-2Cr-2Nb alloy of B and C, its coarse microstructure, about 200 μm about of crystallite dimension.
Embodiment five：A kind of preparation method of homogenization TiAl alloy lamellar microstructure, is carried out according to the following steps：
First, weighing：By each element percentage by weight Al：48%th, Cr：2%th, Nb：2%th, B：0.8%th, C：0.2% and surplus
Ti, weighs aluminium ingot, aluminum niobium intermediate alloy, chromium powder, 0 grade of titanium sponge, boracic raw material respectively and contains carbon source materials for raw material；
2nd, the aluminium ingot weighing in step one is cut into and be smaller in size than 10cm3Aluminium block；Again by weigh in step one 0
Level titanium sponge is divided into two parts, and 0 grade of titanium sponge of a copy of it is added in the copper crucible of smelting furnace；To claim in step one again
The chromium powder taking and aluminum niobium intermediate alloy mix homogeneously, then the chromium powder of mix homogeneously and aluminum niobium intermediate alloy are laid in smelting furnace
Above 0 grade of titanium sponge in copper crucible；Add another 0 grade of titanium sponge again into the copper crucible of smelting furnace, then will be smaller in size than
10cm3Aluminium block be placed on 0 grade of titanium sponge；It is added to melting by the boracic weighing in step one raw material with containing carbon source materials again
In the secondary charging bucket of stove, smelting furnace is carried out be evacuated to vacuum and reach 10-3Mbar, then with speed as 15kW/min plus
Carry power to 300kW, the mixing material in melting to copper crucible is melted completely, obtains alloy melt；Then by secondary charging bucket
Interior boracic raw material and being added in alloy melt containing carbon source materials, is heated to alloy melting, and at a temperature of alloy melting
Insulation 20min, obtains TiAl alloy melt；Then copper crucible is overturn, then TiAl alloy melt is poured into temperature and be 500 DEG C
Steel mold in, be filled with argon into smelting furnace body after 1min, then blow-on, then naturally cool to room temperature, obtain homogenization
TiAl alloy lamellar microstructure；
Boracic raw material described in step 2 is B4C powder；Described B4The particle diameter of C powder is less than 50 μm；
Described in step 2 is B containing carbon source materials4C powder；Described B4The particle diameter of C powder is less than 50 μm；
Purity 99.9wt.% of 0 described in step one grade titanium sponge, the purity ＞ 99.99wt.% of aluminium ingot；
The particle diameter of 0 described in step one grade titanium sponge is less than 10mm.
The homogenization TiAl alloy lamellar microstructure tensile property of embodiment five preparation is tested, according to GB/T 4338-
2006 standards, under room temperature, comprcssive strength is 2364.4MPa, and compression ratio is 31.7%.
Fig. 5 is the Ti-48Al-2Cr-2Nb-0.4B of embodiment five preparation4C alloy lamellar microstructure amplifies 1000 times of SEM
Figure；Add B in Ti-48Al-2Cr-2Nb alloy4After C, boride and carbide are evenly distributed in crystal boundary and transgranular, and it is micro-
Tissue substantially refines, about 50 μm about of crystallite dimension.
Claims (1)
1. a kind of preparation method of homogenization TiAl alloy lamellar microstructure is it is characterised in that the method is to carry out according to the following steps
's：
First, weighing：By each element percentage by weight Al：48%th, B：0.8%th, C：0.2% and surplus Ti, weigh respectively aluminium ingot, 0
Level titanium sponge, boracic raw material and containing carbon source materials be raw material；
2nd, the aluminium ingot weighing in step one is cut into and be smaller in size than 10cm3Aluminium block；Again by weigh in step one 0 grade of sponge
Titanium is added in the copper crucible of smelting furnace；10cm will be smaller in size than again3Aluminium block be placed on 0 grade of titanium sponge；Again by step one
The boracic raw material that weighs and being added in the secondary charging bucket of smelting furnace containing carbon source materials, carries out evacuation the most pure virginity to smelting furnace
Reciprocal of duty cycle reaches 10-3Mbar, then loads power to 300kW, the mixing material in melting to copper crucible with speed for 15kW/min
Melt completely, obtain alloy melt；Then by the boracic raw material in secondary charging bucket be added to alloy containing carbon source materials and melt
In body, it is heated to alloy melting, and is incubated 20min at a temperature of alloy melting, obtain TiAl alloy melt；Then by copper crucible
Upset, then TiAl alloy melt is poured in the steel mold that temperature is 500 DEG C, it is filled with argon into smelting furnace body after 1min,
Then blow-on, then naturally cool to room temperature, obtain homogenization TiAl alloy lamellar microstructure；
Boracic raw material described in step one is boron powder；The particle diameter of described boron powder is less than 50 μm；
Described in step one is carbon dust containing carbon source materials；The particle diameter of described carbon dust is less than 50 μm；
Purity 99.9wt.% of 0 described in step one grade titanium sponge, the purity ＞ 99.99wt.% of aluminium ingot；
The particle diameter of 0 described in step one grade titanium sponge is less than 10mm；
The comprcssive strength of the homogenization TiAl alloy lamellar microstructure described in step 2 is 2130.3MPa, and compression ratio is 30.1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510239382.8A CN104928531B (en) | 2015-05-12 | 2015-05-12 | A kind of homogenization TiAl alloy lamellar microstructure and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510239382.8A CN104928531B (en) | 2015-05-12 | 2015-05-12 | A kind of homogenization TiAl alloy lamellar microstructure and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104928531A CN104928531A (en) | 2015-09-23 |
| CN104928531B true CN104928531B (en) | 2017-03-01 |
Family
ID=54115952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510239382.8A Expired - Fee Related CN104928531B (en) | 2015-05-12 | 2015-05-12 | A kind of homogenization TiAl alloy lamellar microstructure and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104928531B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105220096B (en) * | 2015-11-04 | 2017-03-08 | 哈尔滨工业大学 | A kind of multistep cycle heat treatment method improving conventional cast γ TiAl alloy mechanical property |
| CN108034857A (en) * | 2017-11-23 | 2018-05-15 | 中国航发北京航空材料研究院 | A kind of titanium fire preventing flame retardant coating and preparation method thereof |
| CN109402426A (en) * | 2018-12-29 | 2019-03-01 | 宝鸡长征金属材料有限公司 | A kind of preparation method of fine grain three-element catalytic vacuum melting TiAl target |
| CN110643877A (en) * | 2019-09-09 | 2020-01-03 | 中国航发北京航空材料研究院 | TiAl intermetallic compound containing W, Mn, Si, B, C and rare earth elements |
| CN112301239B (en) * | 2020-09-30 | 2021-10-29 | 广东先导稀材股份有限公司 | Preparation method of cadmium arsenide |
| CN112322955A (en) * | 2020-11-20 | 2021-02-05 | 重庆理工大学 | Titanium-aluminum-based composite material with high-temperature service performance and preparation method thereof |
| CN112626373A (en) * | 2020-11-20 | 2021-04-09 | 重庆理工大学 | High-temperature titanium-aluminum alloy and preparation method thereof |
| CN112359262A (en) * | 2020-11-20 | 2021-02-12 | 重庆理工大学 | Strengthening and toughening titanium-aluminum-based composite material and preparation method thereof |
| CN112410642A (en) * | 2020-11-20 | 2021-02-26 | 重庆理工大学 | Titanium-aluminum-based composite material and preparation method thereof |
| CN116334447A (en) * | 2023-03-23 | 2023-06-27 | 北京科技大学 | Preparation method of C-containing high Nb-TiAl alloy |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035560C (en) * | 1993-09-02 | 1997-08-06 | 航空航天工业部第六二一研究所 | Uniformized smelt casting tech. for titanium-aluminium compound base alloy |
| CN1164780C (en) * | 2001-12-25 | 2004-09-01 | 中国科学院金属研究所 | Process for vacuum induction smelting of Ti-Al-Nb-B alloy |
| DE102004056582B4 (en) * | 2004-11-23 | 2008-06-26 | Gkss-Forschungszentrum Geesthacht Gmbh | Alloy based on titanium aluminides |
| US10208360B2 (en) * | 2013-06-19 | 2019-02-19 | National Institute For Materials Science | Hot-forged TiAl-based alloy and method for producing the same |
| CN103820675A (en) * | 2014-03-12 | 2014-05-28 | 北京工业大学 | Novel V-contained beta-gamma TiAl intermetallic compound material with high Nb content and preparation method thereof |
-
2015
- 2015-05-12 CN CN201510239382.8A patent/CN104928531B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104928531A (en) | 2015-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104928531B (en) | A kind of homogenization TiAl alloy lamellar microstructure and preparation method thereof | |
| CN104862508B (en) | A kind of preparation method of aluminum base graphene composite material | |
| CN104862510B (en) | A kind of high-entropy alloy particle enhanced aluminum-based composite material and preparation method thereof | |
| CN105463222B (en) | A kind of endogenous TiC Ti5Si3The preparation method of granule intensified titanium-base compound material | |
| CN102108455B (en) | Preparation method of aluminum-base composite material | |
| CN104745872A (en) | High-temperature titanium alloy applicable to use at temperature of 650 DEG C and preparation method thereof | |
| CN104120291B (en) | A kind of TiC, TiB2The preparation method of particle enhanced nickel base composite material | |
| CN103122431B (en) | Preparation method for magnesium-lithium alloy with enhanced long-period structure phase | |
| CN102925822B (en) | Metal glass composite material with high-oxygen content and preparation method thereof | |
| CN100465309C (en) | Method for preparing alloy material of high niobium-titanium-aluminum by discharging plasma agglomeration | |
| CN110284032A (en) | A kind of high-entropy alloy particle reinforced magnesium base compound material preparation method | |
| CN109182802B (en) | Preparation method of carbon material reinforced copper/aluminum-based composite material | |
| CN102418025A (en) | Structure controlled preparation method for Nb-Si-based complex alloy | |
| CN108559875A (en) | A kind of High-strength heat-resistant aluminum alloy material and preparation method thereof for engine piston | |
| CN113005345A (en) | High-temperature mechanical property biphase magnesium-lithium alloy and processing technology thereof | |
| CN108642357A (en) | Ultralight high-strength magnesium lithium alloy of a kind of casting containing Nd and preparation method thereof | |
| CN104264082B (en) | A kind of nitrogen-doping Strengthening and Toughening metal glass composite material and preparation method thereof | |
| CN110343895B (en) | In situ TiB2Preparation method of particle-reinforced AlCu-based composite material | |
| CN104946947A (en) | Method for preparing high-strength magnesium-lithium alloy by quick setting by using copper mold and copper mold | |
| CN101402137A (en) | Method for producing CuCr40 contact material with vacuum fusion cast method | |
| CN101555575B (en) | Titanium-aluminum intermetallic compound-carbon nano tube compound material preparation method and products | |
| CN108034866B (en) | A kind of high-performance aluminium silicon nitride based composites and preparation method thereof | |
| CN107937840A (en) | A kind of titanium-aluminium alloy composite material and preparation method thereof | |
| CN112301298B (en) | Light heat-resistant high-rigidity multi-element reinforced aluminum-based composite material and preparation method thereof | |
| CN108588590A (en) | A kind of in-situ authigenic is at TiB2Whisker reinforcement TiAl based composites 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 | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xiao Shulong Inventor after: Li Mingao Inventor after: Xiao Lv Inventor after: Xu Lijuan Inventor after: Wang Baobing Inventor after: Chen Yuyong Inventor after: Li Baohui Inventor after: Li Zhongquan Inventor after: Tian Ying Inventor before: Xiao Shulong Inventor before: Li Mingao Inventor before: Xu Lijuan Inventor before: Chen Yuyong Inventor before: Xiao Lv Inventor before: Wang Baobing Inventor before: Li Baohui Inventor before: Li Zhongquan Inventor before: Tian Ying |
|
| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170301 Termination date: 20210512 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |