CN104588653A - Preparation method of TiAl alloy profile - Google Patents
Preparation method of TiAl alloy profile Download PDFInfo
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- CN104588653A CN104588653A CN201510028133.4A CN201510028133A CN104588653A CN 104588653 A CN104588653 A CN 104588653A CN 201510028133 A CN201510028133 A CN 201510028133A CN 104588653 A CN104588653 A CN 104588653A
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Abstract
The invention discloses a preparation method of a TiAl alloy profile, and relates to a preparation method of an alloy profile. The preparation method aims to solve the problems of large TiAl alloy structure, composition segregation, higher impurity content and defect density, easy cracking and high requirement on equipment and molds existing in a TiAl alloy profile prepared by an existing method. The preparation method comprises the following steps: 1, raw material preparation; 2, densification treatment; 3, lathe machining; 4, blank sheath preparation and pre-extrusion; 5, high-temperature hot extrusion, thus obtaining the TiAl alloy profile. Firstly densification treatment is carried out on TiAl prealloy powder, and then high-temperature hot extrusion is carried out to prepare the TiAl alloy profile; the TiAl alloy profile prepared by the preparation method is small in grain size, high in density, uniform in compositions and excellent in performance. The preparation method of the TiAl alloy profile can be obtained.
Description
Technical field
The present invention relates to a kind of preparation method of alloy profile.
Background technology
TiAl alloy has that density is low, specific strength is high, specific stiffness is high, and good high-temperature oxidation resistant, creep-resistant property, is the very potential lightweight high-temperature structural material of one, has broad application prospects at the industrial circle such as Aero-Space, automobile making.TiAl alloy has the characteristic of metal and covalent bond coexist between the architectural characteristic of atom long-range order and atom, make the elevated temperature strength of its plasticity simultaneously taking into account metal and pottery, compare with nickel base superalloy with conventional titanium alloy, TiAl alloy has the performance advantage such as low-gravity, high creep resistance.But TiAl alloy temperature-room type plasticity is low, high temperature deformation ability, these factors constrain the through engineering approaches application of this alloy.
Usually, preparing TiAl alloy section bar can select casting metallurgy or powder metallurgy to prepare TiAl alloy, then hot extrusion TiAl alloy forming material.The standby TiAl alloy ingot structure of ingot metallurgy legal system is thick, and there is the defect such as shrinkage cavity and porosity and component segregation, needs follow-up hip treatment and thermo-mechanical processi to reduce or eliminate defect, the as-cast structure that refinement is thick; And element powders legal system is squeezed into section bar for Ti and Al complex reheating, also need subsequent high temperature to sinter synthesis, this technique easily introduces high impurity content and defect concentration, is difficult to realization entirely densified, also needs follow-up high temperature insostatic pressing (HIP).The preparation of TiAl alloy section bar needs to carry out at a higher temperature, higher to equipment requirement, and requires the mould having suitable intensity under long-time high temperature.Fine microstructures is prepared before section bar preparation, the TiAl alloy blank of uniform composition, adopt high temperature sheathed extrusion technique again, then effectively can reduce extrusion temperature, increase extruding rate, reduce the requirement of section bar preparation to equipment and mold, prepare composition shape complete, the TiAl alloy section bar of function admirable.
Summary of the invention
The object of the invention is to solve TiAl alloy section bar prepared by existing method to there is TiAl alloy and organize thick, component segregation, impurity content and defect concentration are all high, easy to crack and require high problem to equipment and mold, and provide a kind of preparation method of TiAl alloy section bar.
A preparation method for TiAl alloy section bar, specifically completes according to the following steps:
One, raw material prepare: to take particle diameter be the nominal formula of 0.5 μm ~ 325 μm is the TiAl pre-alloyed powder of Ti-(40 ~ 50) Al-(0.1 ~ 10) X (at%);
X is one in Mo, Cr, Nb, V, Si, Fe, Zr, Mn, B, C, W and Y or wherein several element in Ti-(40 ~ 50) Al-(0.1 ~ 10) X (at%) described in step one;
Nominal formula described in step one is that the TiAl pre-alloyed powder of Ti-(40 ~ 50) Al-(0.1 ~ 10) X (at%) is prepared by inert gas atomizer technology or PREP technology;
Two, densification: the TiAl pre-alloyed powder of particle diameter step one taken to be the nominal formula of 0.5 μm ~ 325 μm be Ti-(40 ~ 50) Al-(0.1 ~ 10) X (at%) processes, and obtains TiAl blank;
It is that one or more in hot pressed sintering, discharge plasma sintering and high temperature insostatic pressing (HIP) carry out processing that the TiAl pre-alloyed powder of to be the nominal formula of 0.5 μm ~ 325 μm be Ti-(40 ~ 50) Al-(0.1 ~ 10) X (at%) of particle diameter step one taken described in step 2 carries out processing;
Three, turnery processing: adopt the method for machining that the TiAl blank obtained in step 2 is carried out machining, obtain TiAl pre-extrusion blank;
Four, pre-extrusion base jacket is prepared: put in jacket by the TiAl pre-extrusion blank of turnery processing in step 4, then carry out soldering and sealing, obtain pre-extrusion base jacket;
The material of the jacket described in step 4 is stainless steel, pure titanium or titanium alloy;
The thickness of the jacket described in step 4 is 2mm ~ 20mm;
Five, high-temperature hot extrudes: pre-extrusion base jacket step 4 obtained puts into heating furnace, again by heating furnace from room temperature to 1000 DEG C ~ 1350 DEG C, 0.5h ~ 4h is incubated again at temperature is 1000 DEG C ~ 1350 DEG C, be that to put into preheat temperature be that the high temperature alloy mould of 600 DEG C ~ 1000 DEG C carries out hot extrusion 1 time ~ 10 times for the pre-extrusion base jacket of 1000 DEG C ~ 1350 DEG C again by temperature, obtain extrusion, extrusion being placed on temperature is in the heating furnace of 1000 DEG C ~ 1350 DEG C again, turn off the power supply of heating furnace again, extrusion naturally cools to 100 DEG C ~ 900 DEG C, be that 100 DEG C ~ 900 DEG C extrusions take out from heating furnace again by temperature, naturally cool to room temperature, remove jacket, obtain TiAl section bar,
The extrusion speed of the hot extrusion described in step 5 is 0.01m/s ~ 1.5m/s, and total extrusion ratio is (2 ~ 16): 1.
Advantage of the present invention:
One, the present invention first carries out densification to TiAl prealloy powder, then carries out Canned Hot and prepare TiAl alloy section bar; After TiAl prealloy powder densification, crystallite dimension is little, and density is high, uniform composition, prepares in section bar process, effectively reduce extrusion temperature at follow-up sheathed extrusion, increases extruding rate, reduces the requirement to equipment and mold;
Two, the TiAl alloy section bar crystal grain that obtains of the present invention is tiny, and density is high, tensile yield strength is 550MPa ~ 800MPa under uniform composition, room temperature, and room temperature percentage elongation is 0.8% ~ 1.8%.
Detailed description of the invention
Detailed description of the invention one: present embodiment is a kind of preparation method of TiAl alloy section bar, specifically completes according to the following steps:
One, raw material prepare: to take particle diameter be the nominal formula of 0.5 μm ~ 325 μm is the TiAl pre-alloyed powder of Ti-(40 ~ 50) Al-(0.1 ~ 10) X (at%);
X is one in Mo, Cr, Nb, V, Si, Fe, Zr, Mn, B, C, W and Y or wherein several element in Ti-(40 ~ 50) Al-(0.1 ~ 10) X (at%) described in step one;
Nominal formula described in step one is that the TiAl pre-alloyed powder of Ti-(40 ~ 50) Al-(0.1 ~ 10) X (at%) is prepared by inert gas atomizer technology or PREP technology;
Two, densification: the TiAl pre-alloyed powder of particle diameter step one taken to be the nominal formula of 0.5 μm ~ 325 μm be Ti-(40 ~ 50) Al-(0.1 ~ 10) X (at%) processes, and obtains TiAl blank;
It is that one or more in hot pressed sintering, discharge plasma sintering and high temperature insostatic pressing (HIP) carry out processing that the TiAl pre-alloyed powder of to be the nominal formula of 0.5 μm ~ 325 μm be Ti-(40 ~ 50) Al-(0.1 ~ 10) X (at%) of particle diameter step one taken described in step 2 carries out processing;
Three, turnery processing: adopt the method for machining that the TiAl blank obtained in step 2 is carried out machining, obtain TiAl pre-extrusion blank;
Four, pre-extrusion base jacket is prepared: put in jacket by the TiAl pre-extrusion blank of turnery processing in step 4, then carry out soldering and sealing, obtain pre-extrusion base jacket;
The material of the jacket described in step 4 is stainless steel, pure titanium or titanium alloy;
The thickness of the jacket described in step 4 is 2mm ~ 20mm;
Five, high-temperature hot extrudes: pre-extrusion base jacket step 4 obtained puts into heating furnace, again by heating furnace from room temperature to 1000 DEG C ~ 1350 DEG C, 0.5h ~ 4h is incubated again at temperature is 1000 DEG C ~ 1350 DEG C, be that to put into preheat temperature be that the high temperature alloy mould of 600 DEG C ~ 1000 DEG C carries out hot extrusion 1 time ~ 10 times for the pre-extrusion base jacket of 1000 DEG C ~ 1350 DEG C again by temperature, obtain extrusion, extrusion being placed on temperature is in the heating furnace of 1000 DEG C ~ 1350 DEG C again, turn off the power supply of heating furnace again, extrusion naturally cools to 100 DEG C ~ 900 DEG C, be that 100 DEG C ~ 900 DEG C extrusions take out from heating furnace again by temperature, naturally cool to room temperature, remove jacket, obtain TiAl section bar,
The extrusion speed of the hot extrusion described in step 5 is 0.01m/s ~ 1.5m/s, and total extrusion ratio is (2 ~ 16): 1.
The advantage of present embodiment:
One, present embodiment is first carried out densification to TiAl prealloy powder, is then carried out Canned Hot and prepare TiAl alloy section bar; After TiAl prealloy powder densification, crystallite dimension is little, and density is high, uniform composition, prepares in section bar process, effectively reduce extrusion temperature at follow-up sheathed extrusion, increases extruding rate, reduces the requirement to equipment and mold;
Two, the TiAl alloy section bar crystal grain that obtains of present embodiment is tiny, and density is high, tensile yield strength is 550MPa ~ 800MPa under uniform composition, room temperature, and room temperature percentage elongation is 0.8% ~ 1.8%.
Present embodiment can obtain a kind of preparation method of TiAl alloy section bar.
Detailed description of the invention two: present embodiment and detailed description of the invention one difference are: to take particle diameter in step one be the nominal formula of 0.5 μm ~ 325 μm is the TiAl pre-alloyed powder of Ti-(41 ~ 44) Al-(4 ~ 9) X (at%).Other steps are identical with detailed description of the invention one.
Detailed description of the invention three: one of present embodiment and detailed description of the invention one or two difference is: to take particle diameter in step one be the nominal formula of 0.5 μm ~ 325 μm is the TiAl pre-alloyed powder of Ti-(45 ~ 48) Al-(4 ~ 8.5) X (at%).Other steps are identical with detailed description of the invention one or two.
Detailed description of the invention four: one of present embodiment and detailed description of the invention one to three difference is: to take particle diameter in step one be the nominal formula of 0.5 μm ~ 325 μm is the TiAl pre-alloyed powder of Ti-43Al-9V-0.3Y (at%).Other steps are identical with detailed description of the invention one to three.
Detailed description of the invention five: one of present embodiment and detailed description of the invention one to four difference is: the pressure of the hot pressed sintering described in step 2 is 20MPa ~ 150MPa, temperature is 850 DEG C ~ 1350 DEG C, and sintering time is 0.5h ~ 4h; The pressure of the discharge plasma sintering described in step 2 is 40MPa ~ 100MPa, and sintering temperature is 900 DEG C ~ 1300 DEG C, and vacuum is 10
-4pa ~ 10Pa, sintering time is 2min ~ 60min; The temperature of the high temperature insostatic pressing (HIP) described in step 2 is 1100 DEG C ~ 1280 DEG C, and pressure is 140MPa ~ 200MPa, and the time is 1h ~ 4h.Other steps are identical with detailed description of the invention one to four.
Detailed description of the invention six: one of present embodiment and detailed description of the invention one to five difference is: the pressure of the hot pressed sintering described in step 2 is 40MPa ~ 80MPa, temperature is 1000 DEG C ~ 1300 DEG C, and sintering time is 1h ~ 4h; The pressure of the discharge plasma sintering described in step 2 is 50MPa ~ 80MPa, and sintering temperature is 950 DEG C ~ 1200 DEG C, and vacuum is 10
-4~ 10Pa, sintering time is 5min ~ 20min; The temperature of the high temperature insostatic pressing (HIP) described in step 2 is 1100 DEG C ~ 1250 DEG C, and pressure is 160MPa ~ 200MPa, and the time is 1.5h ~ 2.5h.Other steps are identical with detailed description of the invention one to five.
Detailed description of the invention seven: one of present embodiment and detailed description of the invention one to six difference is: pre-extrusion base jacket step 4 obtained in step 5 puts into heating furnace, again by heating furnace from room temperature to 1180 DEG C ~ 1280 DEG C, 0.5h ~ 4h is incubated again at temperature is 1180 DEG C ~ 1280 DEG C, be that to put into preheat temperature be that the high temperature alloy mould of 700 DEG C ~ 900 DEG C carries out hot extrusion 2 times ~ 5 times for the pre-extrusion base jacket of 1180 DEG C ~ 1280 DEG C again by temperature, obtain extrusion.Other steps are identical with detailed description of the invention one to six.
Detailed description of the invention eight: one of present embodiment and detailed description of the invention one to seven difference is: the extrusion speed of the hot extrusion described in step 5 is 0.01m/s ~ 0.5m/s, total extrusion ratio (2 ~ 10): 1.Other steps are identical with detailed description of the invention one to seven.
Detailed description of the invention nine: one of present embodiment and detailed description of the invention one to eight difference is: pre-extrusion base jacket step 4 obtained in step 5 puts into heating furnace, again by heating furnace from room temperature to 1150 DEG C ~ 1300 DEG C, 1h ~ 4h is incubated again at temperature is 1150 DEG C ~ 1300 DEG C, be that to put into preheat temperature be that the high temperature alloy mould of 750 DEG C ~ 950 DEG C carries out hot extrusion 2 times ~ 6 times for the pre-extrusion base jacket of 1150 DEG C ~ 1300 DEG C again by temperature, obtain extrusion; The extrusion speed of the hot extrusion described in step 5 is 0.15m/s ~ 0.3m/s, total extrusion ratio (2 ~ 12): 1.Other steps are identical with detailed description of the invention one to eight.
Adopt following verification experimental verification beneficial effect of the present invention:
Test one: a kind of preparation method of TiAl alloy section bar specifically completes according to the following steps:
One, raw material prepare: to take particle diameter be the nominal formula of 5 μm ~ 200 μm is the TiAl pre-alloyed powder of Ti-47Al-2Cr-2Nb (at%);
Nominal formula described in step one is that the TiAl pre-alloyed powder of Ti-47Al-2Cr-2Nb (at%) is prepared by PREP technology;
Two, densification: the TiAl pre-alloyed powder of particle diameter step one taken to be the nominal formula of 5 μm ~ 200 μm be Ti-47Al-2Cr-2Nb (at%) processes, and obtains TiAl blank;
The TiAl pre-alloyed powder of to be the nominal formula of 5 μm ~ 200 μm the be Ti-47Al-2Cr-2Nb (at%) of particle diameter step one taken described in step 2 carries out processing processing through hot pressed sintering; The pressure of described hot pressed sintering is 50MPa, and temperature is 1280 DEG C, and sintering time is 3h;
Three, turnery processing: adopt the method for machining that the TiAl blank obtained in step 2 is carried out machining, obtain TiAl pre-extrusion blank;
Four, pre-extrusion base jacket is prepared: put in jacket by the TiAl pre-extrusion blank of turnery processing in step 4, then carry out soldering and sealing, obtain pre-extrusion base jacket;
The material of the jacket described in step 4 is stainless steel;
The thickness of the jacket described in step 4 is 4mm;
Five, high-temperature hot extrudes: pre-extrusion base jacket step 4 obtained puts into heating furnace, again by heating furnace from room temperature to 1310 DEG C, 3h is incubated again at temperature is 1310 DEG C, be that to put into preheat temperature be that the high temperature alloy mould of 850 DEG C carries out hot extrusion 4 times for the pre-extrusion base jacket of 1310 DEG C again by temperature, obtain extrusion, extrusion being placed on temperature is in the heating furnace of 1310 DEG C again, turn off the power supply of heating furnace again, extrusion naturally cools to 350 DEG C, be that 350 DEG C of extrusions take out from heating furnace again by temperature, naturally cool to room temperature, obtain TiAl extrudate,
The extrusion speed of the hot extrusion described in step 5 is 0.2m/s, total extrusion ratio 3:1;
The TiAl alloy section bar that test one obtains is square bar; Under TiAl alloy square bar room temperature, tensile yield strength is 550MPa, and room temperature percentage elongation is 0.95%.
Test two: a kind of preparation method of TiAl alloy section bar, specifically completes according to the following steps:
One, raw material prepare: to take particle diameter be the nominal formula of 0.5 μm ~ 150 μm is the TiAl pre-alloyed powder of Ti-43Al-9V-0.3Y (at%);
Nominal formula described in step one is the TiAl pre-alloyed powder of Ti-43Al-9V-0.3Y (at%) is by inert gas atomizer technology;
Two, densification: the TiAl pre-alloyed powder of particle diameter step one taken to be the nominal formula of 0.5 μm ~ 150 μm be Ti-43Al-9V-0.3Y (at%) processes, and obtains TiAl blank;
The TiAl pre-alloyed powder of to be the nominal formula of 0.5 μm ~ 150 μm the be Ti-43Al-9V-0.3Y (at%) of particle diameter step one taken described in step 2 carries out processing processing through discharge plasma sintering; The pressure of described discharge plasma sintering is 80MPa, and sintering temperature is 1180 DEG C, and vacuum is 10
-2, sintering time is 8min;
Three, turnery processing: adopt the method for machining that the TiAl blank obtained in step 2 is carried out machining, obtain TiAl pre-extrusion blank;
Four, pre-extrusion base jacket is prepared: put in jacket by the TiAl pre-extrusion blank of turnery processing in step 4, then carry out soldering and sealing, obtain pre-extrusion base jacket;
The material of the jacket described in step 4 is pure titanium;
The thickness of the jacket described in step 4 is 4mm;
Five, high-temperature hot extrudes: pre-extrusion base jacket step 4 obtained puts into heating furnace, again by heating furnace from room temperature to 1280 DEG C, 2h is incubated again at temperature is 1280 DEG C, be that to put into preheat temperature be that the high temperature alloy mould of 900 DEG C carries out hot extrusion 4 times for the pre-extrusion base jacket of 1280 DEG C again by temperature, obtain extrusion, extrusion being placed on temperature is in the heating furnace of 1280 DEG C again, turn off the power supply of heating furnace again, extrusion naturally cools to 400 DEG C, be that 400 DEG C of extrusions take out from heating furnace again by temperature, naturally cool to room temperature, obtain TiAl extrude tubes,
The extrusion speed of the hot extrusion described in step 5 is 0.3m/s, total extrusion ratio 4:1;
The TiAl alloy section bar that test two obtains is tubing; Under TiAl alloy square bar room temperature, tensile yield strength is 700MPa, and room temperature percentage elongation is 1.8%.
Test three: a kind of preparation method of TiAl alloy section bar specifically completes according to the following steps:
One, raw material prepare: to take particle diameter be the nominal formula of 5 μm ~ 200 μm is the TiAl pre-alloyed powder of Ti-45Al-6Nb-0.2B-0.25Y (at%);
Nominal formula described in step one is the TiAl pre-alloyed powder of Ti-45Al-6Nb-0.2B-0.25Y (at%) is by inert gas atomizer technology;
Two, densification: the TiAl pre-alloyed powder of particle diameter step one taken to be the nominal formula of 5 μm ~ 200 μm be Ti-45Al-6Nb-0.2B-0.25Y (at%) processes, and obtains TiAl blank;
The TiAl pre-alloyed powder of to be the nominal formula of 5 μm ~ 200 μm the be Ti-45Al-6Nb-0.2B-0.25Y (at%) of particle diameter step one taken described in step 2 carries out processing processing through high temperature insostatic pressing (HIP); The temperature of described high temperature insostatic pressing (HIP) is 1250 DEG C, and pressure is 160MPa, and the time is 2h;
Three, turnery processing: adopt the method for machining that the TiAl blank obtained in step 2 is carried out machining, obtain TiAl pre-extrusion blank;
Four, pre-extrusion base jacket is prepared: put in jacket by the TiAl pre-extrusion blank of turnery processing in step 4, then carry out soldering and sealing, obtain pre-extrusion base jacket;
The material of the jacket described in step 4 is titanium alloy;
The thickness of the jacket described in step 4 is 5mm;
Five, high-temperature hot extrudes: pre-extrusion base jacket step 4 obtained puts into heating furnace, again by heating furnace from room temperature to 1320 DEG C, 3h is incubated again at temperature is 1320 DEG C, be that to put into preheat temperature be that the high temperature alloy mould of 950 DEG C carries out hot extrusion 9 times for the pre-extrusion base jacket of 1320 DEG C again by temperature, obtain extrusion, extrusion being placed on temperature is in the heating furnace of 1320 DEG C again, turn off the power supply of heating furnace again, extrusion is as cold as 500 DEG C naturally, be that 500 DEG C of extrusions take out from heating furnace again by temperature, naturally cool to room temperature, obtain TiAl extruded bars,
The extrusion speed of the hot extrusion described in step 5 is 0.2m/s, total extrusion ratio 9:1;
The TiAl alloy section bar that test three obtains is bar; Under TiAl alloy square bar room temperature, tensile yield strength is 750MPa, and room temperature percentage elongation is 1.2%.
Claims (9)
1. a preparation method for TiAl alloy section bar, is characterized in that what a kind of preparation method of TiAl alloy section bar specifically completed according to the following steps:
One, raw material prepare: to take particle diameter be the nominal formula of 0.5 μm ~ 325 μm is the TiAl pre-alloyed powder of Ti-(40 ~ 50) Al-(0.1 ~ 10) X (at%);
X is one in Mo, Cr, Nb, V, Si, Fe, Zr, Mn, B, C, W and Y or wherein several element in Ti-(40 ~ 50) Al-(0.1 ~ 10) X (at%) described in step one;
Nominal formula described in step one is that the TiAl pre-alloyed powder of Ti-(40 ~ 50) Al-(0.1 ~ 10) X (at%) is prepared by inert gas atomizer technology or PREP technology;
Two, densification: the TiAl pre-alloyed powder of particle diameter step one taken to be the nominal formula of 0.5 μm ~ 325 μm be Ti-(40 ~ 50) Al-(0.1 ~ 10) X (at%) processes, and obtains TiAl blank;
It is that one or more in hot pressed sintering, discharge plasma sintering and high temperature insostatic pressing (HIP) carry out processing that the TiAl pre-alloyed powder of to be the nominal formula of 0.5 μm ~ 325 μm be Ti-(40 ~ 50) Al-(0.1 ~ 10) X (at%) of particle diameter step one taken described in step 2 carries out processing;
Three, turnery processing: adopt the method for machining that the TiAl blank obtained in step 2 is carried out machining, obtain TiAl pre-extrusion blank;
Four, pre-extrusion base jacket is prepared: put in jacket by the TiAl pre-extrusion blank of turnery processing in step 4, then carry out soldering and sealing, obtain pre-extrusion base jacket;
The material of the jacket described in step 4 is stainless steel, pure titanium or titanium alloy;
The thickness of the jacket described in step 4 is 2mm ~ 20mm;
Five, high-temperature hot extrudes: pre-extrusion base jacket step 4 obtained puts into heating furnace, again by heating furnace from room temperature to 1000 DEG C ~ 1350 DEG C, 0.5h ~ 4h is incubated again at temperature is 1000 DEG C ~ 1350 DEG C, be that to put into preheat temperature be that the high temperature alloy mould of 600 DEG C ~ 1000 DEG C carries out hot extrusion 1 time ~ 10 times for the pre-extrusion base jacket of 1000 DEG C ~ 1350 DEG C again by temperature, obtain extrusion, extrusion being placed on temperature is in the heating furnace of 1000 DEG C ~ 1350 DEG C again, turn off the power supply of heating furnace again, extrusion naturally cools to 100 DEG C ~ 900 DEG C, be that 100 DEG C ~ 900 DEG C extrusions take out from heating furnace again by temperature, naturally cool to room temperature, remove jacket, obtain TiAl section bar,
The extrusion speed of the hot extrusion described in step 5 is 0.01m/s ~ 1.5m/s, and total extrusion ratio is (2 ~ 16): 1.
2. the preparation method of a kind of TiAl alloy section bar according to claim 1, to it is characterized in that taking in step one particle diameter be the nominal formula of 0.5 μm ~ 325 μm is the TiAl pre-alloyed powder of Ti-(41 ~ 44) Al-(4 ~ 9) X (at%).
3. the preparation method of a kind of TiAl alloy section bar according to claim 1, to it is characterized in that taking in step one particle diameter be the nominal formula of 0.5 μm ~ 325 μm is the TiAl pre-alloyed powder of Ti-(45 ~ 48) Al-(4 ~ 8.5) X (at%).
4. the preparation method of a kind of TiAl alloy section bar according to claim 1, to it is characterized in that taking in step one particle diameter be the nominal formula of 0.5 μm ~ 325 μm is the TiAl pre-alloyed powder of Ti-43Al-9V-0.3Y (at%).
5. the preparation method of a kind of TiAl alloy section bar according to claim 1, is characterized in that the pressure of the hot pressed sintering described in step 2 is 20MPa ~ 150MPa, and temperature is 850 DEG C ~ 1350 DEG C, and sintering time is 0.5h ~ 4h; The pressure of the discharge plasma sintering described in step 2 is 40MPa ~ 100MPa, and sintering temperature is 900 DEG C ~ 1300 DEG C, and vacuum is 10
-4pa ~ 10Pa, sintering time is 2min ~ 60min; The temperature of the high temperature insostatic pressing (HIP) described in step 2 is 1100 DEG C ~ 1280 DEG C, and pressure is 140MPa ~ 200MPa, and the time is 1h ~ 4h.
6. the preparation method of a kind of TiAl alloy section bar according to claim 1, is characterized in that the pressure of the hot pressed sintering described in step 2 is 40MPa ~ 80MPa, and temperature is 1000 DEG C ~ 1300 DEG C, and sintering time is 1h ~ 4h; The pressure of the discharge plasma sintering described in step 2 is 50MPa ~ 80MPa, and sintering temperature is 950 DEG C ~ 1200 DEG C, and vacuum is 10
-4~ 10Pa, sintering time is 5min ~ 20min; The temperature of the high temperature insostatic pressing (HIP) described in step 2 is 1100 DEG C ~ 1250 DEG C, and pressure is 160MPa ~ 200MPa, and the time is 1.5h ~ 2.5h.
7. the preparation method of a kind of TiAl alloy section bar according to claim 1, it is characterized in that pre-extrusion base jacket step 4 obtained in step 5 puts into heating furnace, again by heating furnace from room temperature to 1180 DEG C ~ 1280 DEG C, 0.5h ~ 4h is incubated again at temperature is 1180 DEG C ~ 1280 DEG C, be that to put into preheat temperature be that the high temperature alloy mould of 700 DEG C ~ 900 DEG C carries out hot extrusion 2 times ~ 5 times for the pre-extrusion base jacket of 1180 DEG C ~ 1280 DEG C again by temperature, obtain extrusion.
8. the preparation method of a kind of TiAl alloy section bar according to claim 1, is characterized in that the extrusion speed of the hot extrusion described in step 5 is 0.01m/s ~ 0.5m/s, total extrusion ratio (2 ~ 10): 1.
9. the preparation method of a kind of TiAl alloy section bar according to claim 1, it is characterized in that pre-extrusion base jacket step 4 obtained in step 5 puts into heating furnace, again by heating furnace from room temperature to 1150 DEG C ~ 1300 DEG C, 1h ~ 4h is incubated again at temperature is 1150 DEG C ~ 1300 DEG C, be that to put into preheat temperature be that the high temperature alloy mould of 750 DEG C ~ 950 DEG C carries out hot extrusion 2 times ~ 6 times for the pre-extrusion base jacket of 1150 DEG C ~ 1300 DEG C again by temperature, obtain extrusion; The extrusion speed of the hot extrusion described in step 5 is 0.15m/s ~ 0.3m/s, total extrusion ratio (2 ~ 12): 1.
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| CN105665729A (en) * | 2016-04-11 | 2016-06-15 | 西安欧中材料科技有限公司 | High-density Ti2AlNb powder alloy near-net forming technology |
| CN106636740A (en) * | 2016-11-01 | 2017-05-10 | 太原理工大学 | Method for preparing TiAl alloy plate without canning |
| CN106636741A (en) * | 2016-11-01 | 2017-05-10 | 太原理工大学 | Preparation method for TiAl alloy bar |
| CN107779668A (en) * | 2016-08-30 | 2018-03-09 | 江苏凤凰木业有限公司 | A kind of titanium alloy die casting |
| CN108097962A (en) * | 2017-12-29 | 2018-06-01 | 中南大学 | A kind of preparation method of Nb toughenings titanium aluminium base alloy composite material |
| CN109136647A (en) * | 2018-10-09 | 2019-01-04 | 广州宇智科技有限公司 | A kind of chemical field low-cost high-strength erosion resistant titanium alloy and its processing technology |
| CN109280789A (en) * | 2018-10-18 | 2019-01-29 | 哈尔滨工业大学 | A kind of preparation method of the original position submicron particles enhancing high-strength TiAl alloy of fine grain |
| CN109596800A (en) * | 2018-12-24 | 2019-04-09 | 哈尔滨工业大学 | A kind of 2024 aluminum matrix composite jacket thermo shaping method of high-volume fractional whisker reinforcement |
| CN110744044A (en) * | 2019-08-23 | 2020-02-04 | 南京理工大学 | Spark plasma sintering preparation method of fine-grain Ti-48Al-2Cr-8Nb titanium-aluminum alloy |
| CN110899706A (en) * | 2019-10-29 | 2020-03-24 | 西北稀有金属材料研究院宁夏有限公司 | Beryllium rod and preparation method thereof |
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| CN112404426A (en) * | 2020-11-24 | 2021-02-26 | 西北工业大学 | Titanium-aluminum alloy die, preparation method of titanium-aluminum alloy outer sheath and method for performing spark plasma sintering by using titanium-aluminum alloy die |
| CN115386780A (en) * | 2022-09-13 | 2022-11-25 | 南京工业大学 | Light high-strength high-toughness Gao Shangchao alloy and preparation method thereof |
| CN115572858A (en) * | 2022-09-06 | 2023-01-06 | 北京科技大学 | Fine fully lamellar deformation TiAl alloy and preparation method thereof |
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| CN106636740A (en) * | 2016-11-01 | 2017-05-10 | 太原理工大学 | Method for preparing TiAl alloy plate without canning |
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| CN109136647A (en) * | 2018-10-09 | 2019-01-04 | 广州宇智科技有限公司 | A kind of chemical field low-cost high-strength erosion resistant titanium alloy and its processing technology |
| CN109280789A (en) * | 2018-10-18 | 2019-01-29 | 哈尔滨工业大学 | A kind of preparation method of the original position submicron particles enhancing high-strength TiAl alloy of fine grain |
| CN109596800A (en) * | 2018-12-24 | 2019-04-09 | 哈尔滨工业大学 | A kind of 2024 aluminum matrix composite jacket thermo shaping method of high-volume fractional whisker reinforcement |
| CN110744044A (en) * | 2019-08-23 | 2020-02-04 | 南京理工大学 | Spark plasma sintering preparation method of fine-grain Ti-48Al-2Cr-8Nb titanium-aluminum alloy |
| CN110744044B (en) * | 2019-08-23 | 2022-04-12 | 南京理工大学 | Spark plasma sintering preparation method of fine-grain Ti-48Al-2Cr-8Nb titanium-aluminum alloy |
| CN110899706A (en) * | 2019-10-29 | 2020-03-24 | 西北稀有金属材料研究院宁夏有限公司 | Beryllium rod and preparation method thereof |
| CN111299613A (en) * | 2020-03-27 | 2020-06-19 | 宁波江丰电子材料股份有限公司 | Machining method of titanium-aluminum alloy target material, product and application thereof |
| CN112404426A (en) * | 2020-11-24 | 2021-02-26 | 西北工业大学 | Titanium-aluminum alloy die, preparation method of titanium-aluminum alloy outer sheath and method for performing spark plasma sintering by using titanium-aluminum alloy die |
| CN115572858A (en) * | 2022-09-06 | 2023-01-06 | 北京科技大学 | Fine fully lamellar deformation TiAl alloy and preparation method thereof |
| CN115572858B (en) * | 2022-09-06 | 2024-03-26 | 北京科技大学 | Fine full-lamellar deformed TiAl alloy and preparation method thereof |
| CN115386780A (en) * | 2022-09-13 | 2022-11-25 | 南京工业大学 | Light high-strength high-toughness Gao Shangchao alloy and preparation method thereof |
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