CN107779665A - A kind of titanium alloy and its processing method - Google Patents
A kind of titanium alloy and its processing method Download PDFInfo
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- CN107779665A CN107779665A CN201610712535.0A CN201610712535A CN107779665A CN 107779665 A CN107779665 A CN 107779665A CN 201610712535 A CN201610712535 A CN 201610712535A CN 107779665 A CN107779665 A CN 107779665A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
Abstract
The invention provides a kind of titanium alloy and its processing method, wherein, 1)~6 the method for machining titanium alloy comprises the following steps):1) titanium alloy for needing to process is heated to Tβ+ 55~Tβ+ 65 DEG C, insulation, then forge, cool down；2) titanium alloy obtained by step 1) is heated to Tβ35~Tβ25 DEG C, insulation, then forge, cool down；3) titanium alloy obtained by step 2) is heated to Tβ+ 15~Tβ+ 25 DEG C, insulation, then forge, cool down；4) titanium alloy obtained by step 3) is heated to Tβ75~Tβ65 DEG C, insulation, then forge, cool down；5) titanium alloy obtained by step 4) is heated to Tβ120~Tβ90 DEG C, insulation, then forge, cool down；6) titanium alloy obtained by step 5) is heated to Tβ350~Tβ300 DEG C, it is incubated, cooling.There is improved mechanical property, especially room temperature elongation percentage using the titanium alloy of this method processing.
Description
Technical field
The invention belongs to titanium alloy field, and in particular to a kind of titanium alloy and its processing method.
Background technology
Titanium or titanium alloy be widely used in because having the advantages that high specific strength, corrosion resistance good Aeronautics and Astronautics, weapons,
The industrial circles such as automobile.Up to the present, up to tens kinds of the titanium alloy succeeded in developing both at home and abroad, wherein most widely used
Be a kind of alpha and beta type titan alloy, Ti-6Al-4V alloys.
In all titanium alloy application fields such as aviation, automobile, the energy, naval vessel, chemical industry, medicine equipment and sports goods,
The proportion of Ti-6Al-4V alloys accounts for more than 50%.Due to containing 4% (percentage by weight, similarly hereinafter) in Ti-6Al-4V alloys
Expensive V element, cause the production cost of Ti-6Al-4V alloys higher.
Chinese patent CN 102212716A disclose a kind of new alpha and beta type titan alloy, with the addition of in the alloying component cheap
The element such as Mo, Zr, Fe, Cr, without expensive V element, its mechanical property is suitable with Ti-6Al-4V alloys, but has
Higher price-performance ratio.
The content of the invention
Alloy plasticity is more high to be more easily processed to the complicated part of shape, and cold plasticity is better, and processing cost is also got over
It is low, using also more extensive.
Inventor has found that the titanium alloy component of many aviation fields is complicated, such as hollow fan blade for aircraft engine
Deng, it is often necessary to processed using the method for superplastic forming.
Inventor can significantly improve this it has furthermore been found that by a kind of a kind of specific titanium alloy of specific method processing
Improve the plasticity of titanium alloy, especially temperature-room type plasticity, particularly room temperature elongation percentage.
It is an object of the present invention to provide a kind of method of machining titanium alloy.It is also another object of the present invention to provide one
The processing method that kind can improve titanium alloy plasticity.It is also another object of the present invention to provide a kind of titanium alloy.It is of the invention another
Individual purpose is to provide a kind of good titanium alloy of temperature-room type plasticity.
First aspect present invention provides a kind of titanium alloy, and the composition of the titanium alloy contains by weight：
Al：3%~3.7% (such as 3.5%)；
Mo：2.5%~4% (such as 2.5%, 3% or 3.5%)；
Zr：2%~4% (such as 3%)；
Si：0%~0.35% (such as 0.08%, 0.1%, 0.15% or 0.25%)；
M：M is Cr and/or Fe, if M is Cr, Cr content is 2.3%~3.3% (such as 2.5% or 3%), if M
For Fe, Fe content is 0.4%~1.2% (such as 0.6%, 0.8% or 1.0%), if M is made up of Cr and Fe, Cr and Fe
Total content is 0.4%~3.3% (such as 1.0% or 2.5%, Cr and Fe mass ratio are preferably 0.01~100)；
Impurity element total amount≤0.4%, surplus Ti；
The room temperature elongation percentage of the titanium alloy is 30~70%, preferably 30~60%, further preferably 40~60%, further preferably 50
~60%；
Preferably, the tensile strength Rm of the titanium alloy is 875~950MPa, preferably 880~920MPa；
Preferably, the yield strength Rp of the titanium alloy0.2For 960~1100MPa, preferably 965~995MPa.
In one embodiment, the titanium alloy of any one of present invention, the titanium alloy have following one or more spies
Sign：
A) Si content is 0%~0.1%；
If b) M is Cr, Cr content is 2.3%~3%,
If c) M is Fe, Fe content is 1%~1.2%,
If d) M is made up of Cr and Fe, Cr and Fe total contents are 1%~3%.
In one embodiment, the titanium alloy of any one of present invention, the impurity element are included selected from following element
It is one or more：C、O、N、H；
Preferably, in the impurity element, if so, C≤0.04%, O≤0.15%, N≤0.04%, H≤
0.015%.
Second aspect of the present invention provides a kind of method of machining titanium alloy, 1)~6 it comprises the following steps):
1) titanium alloy for needing to process is heated to Tβ+ 50~Tβ+ 70 DEG C, insulation, then forge, cool down；
2) titanium alloy obtained by step 1) is heated to Tβ- 40~Tβ- 20 DEG C, insulation, then forge, cool down；
3) titanium alloy obtained by step 2) is heated to Tβ+ 10~Tβ+ 30 DEG C, insulation, then forge, cool down；
4) titanium alloy obtained by step 3) is heated to Tβ- 80~Tβ- 60 DEG C, insulation, then forge, cool down；
5) titanium alloy obtained by step 4) is heated to Tβ- 130~Tβ- 80 DEG C, insulation, then forge, cool down.
6) titanium alloy obtained by step 5) is heated to Tβ- 350 DEG C~Tβ- 300 DEG C, it is incubated, cooling.
In one embodiment, the method for the machining titanium alloy of any one of present invention, it has following one or more
Feature：
E) wherein step 1), it would be desirable to which the titanium alloy of processing is heated to Tβ+ 55~Tβ+ 65 DEG C, insulation, then forge, it is cold
But；
F) wherein step 2), titanium alloy obtained by step 1) is heated to Tβ- 35~Tβ- 25 DEG C, insulation, then forge, it is cold
But；
G) wherein step 3), titanium alloy obtained by step 2) is heated to Tβ+ 15~Tβ+ 25 DEG C, insulation, then forge, it is cold
But；
H) wherein step 4), titanium alloy obtained by step 3) is heated to Tβ- 75~Tβ- 65 DEG C, insulation, then forge, it is cold
But；
I) wherein step 5), titanium alloy obtained by step 4) is heated to Tβ- 120~Tβ- 90 DEG C, insulation, then forge, it is cold
But；
J) wherein step 6), titanium alloy obtained by step 5) is heated to Tβ- 340~Tβ- 310 DEG C, it is incubated, cooling.
In one embodiment, the method for the machining titanium alloy of any one of present invention, it has following one or more
Feature：
K) wherein step 1), it would be desirable to which the titanium alloy of processing is heated to Tβ+ 60 DEG C, insulation, then forge, cool down；
L) wherein step 2) includes：Titanium alloy obtained by step 1) is heated to Tβ- 30 DEG C, insulation, then forge, cool down；
M) wherein step 3) includes：Titanium alloy obtained by step 2) is heated to Tβ+ 20 DEG C, insulation, then forge, cool down；
N) wherein step 4) includes：Titanium alloy obtained by step 3) is heated to Tβ- 70 DEG C, insulation, then forge, cool down；
O) wherein step 5) includes：Titanium alloy obtained by step 4) is heated to Tβ- 115~Tβ- 105 DEG C, insulation, then forge
Make, cool down；
P) wherein step 6) includes：Titanium alloy obtained by step 5) is heated to Tβ- 330~Tβ- 320 DEG C, it is incubated, cooling.
In one embodiment, the method for the machining titanium alloy of any one of present invention, it has following one or more
Feature：
Q) wherein step 1), the time of insulation is 0.5D~0.7D minutes；
R) wherein step 2), the time of insulation is 0.5D~0.7D minutes；
S) wherein step 3), the time of insulation is 0.4D~0.6D minutes；
T) wherein step 4), the time of insulation is 0.6D~0.8D minutes；
U) wherein step 5), the time of insulation is 0.7D~0.9D minutes；
V) wherein step 6), the time of insulation is 6~8 hours；
In terms of millimeter, D is the diameter of titanium alloy or the value of thickness.Preferably, if titanium alloy is round billet (cylinder base
Material), D is its diameter value；Preferably, if titanium alloy is slab (cuboid blank), D is its thickness value.
In one embodiment, the method for the machining titanium alloy of any one of present invention, the forging include：
One or many Upsettings is carried out to titanium alloy, and
One or many pulling deformations；
Preferably, the forging includes carrying out titanium alloy successively Upsetting and once pulling deformation；
Preferably, titanium alloy is bar-shaped, and Upsetting and pulling deformation are all the axis directions along the bar-shaped titanium alloy.
In one embodiment, the method for the machining titanium alloy of any one of present invention, Upsetting and/or pulling deformation
Deflection be 30~50%；
Preferably, step 1)~4) in, the deflection of Upsetting and/or pulling deformation is 40~50%
Preferably, in step 5), the deflection of Upsetting and/or pulling deformation is 30~40%.
In one embodiment, the method for the machining titanium alloy of any one of present invention, it is described to be cooled to water cooling or air cooling,
Preferably, step 1)~4), the mode of cooling is water cooling；
Preferably, step 5)~6), the mode of cooling is air cooling.
In one embodiment, the present invention any one of machining titanium alloy method, it is necessary to processing titanium alloy be through
Titanium alloy after cogging forging,：
Preferably, cogging forging is that titanium alloy raw material (such as titan alloy casting ingot) is heated into 1150 DEG C, insulation, is then forged
Make, cool down, forging preferably includes 1 Upsetting and 1 pulling deformation.
In one embodiment, the method for the machining titanium alloy of any one of present invention, the titanium alloy for needing to process
Composition containing by weight：
Al：3%~3.7% (such as 3.5%)；
Mo：2.5%~4% (such as 2.5%, 3% or 3.5%)；
Zr：2%~4% (such as 3%)；
Si：0%~0.35% (such as 0.08%, 0.1%, 0.15% or 0.25%)；
M：M is Cr and/or Fe, if M is Cr, Cr content is 2.3%~3.3% (such as 2.5% or 3%), if M
For Fe, Fe content is 0.4%~1.2% (such as 0.6%, 0.8% or 1.0%), if M is made up of Cr and Fe, Cr and Fe
Total content is 0.4%~3.3% (such as 1.0% or 2.5%, Cr and Fe mass ratio are preferably 0.01~100)；
Impurity element total amount≤0.4%, surplus Ti；
Preferably, the impurity element includes the one or more selected from following element：C、O、N、H；
Preferably, in the impurity element, if so, C≤0.04%, O≤0.15%, N≤0.04%, H≤
0.015%.
In one embodiment, the method for the machining titanium alloy of any one of present invention, the titanium alloy for needing to process
With following one or more features：
A) Si content is 0%~0.1%；
If b) M is Cr, Cr content is 2.3%~3%,
If c) M is Fe, Fe content is 1%~1.2%,
If d) M is made up of Cr and Fe, Cr and Fe total contents are 1%~3%.
Third aspect present invention provides a kind of titanium alloy, and it is obtained by method any one of of the invention.
In one embodiment, the titanium alloy of any one of present invention, the composition of the titanium alloy contain by weight：
Al：3%~3.7% (such as 3.5%)；
Mo：2.5%~4% (such as 2.5%, 3% or 3.5%)；
Zr：2%~4% (such as 3%)；
Si：0%~0.35% (such as 0.08%, 0.1%, 0.15% or 0.25%)；
M：M is Cr and/or Fe, if M is Cr, Cr content is 2.3%~3.3% (such as 2.5% or 3%), if M
For Fe, Fe content is 0.4%~1.2% (such as 0.6%, 0.8% or 1.0%), if M is made up of Cr and Fe, Cr and Fe
Total content is 0.4%~3.3% (such as 1.0% or 2.5%, Cr and Fe mass ratio are preferably 0.01~100)；
Impurity element total amount≤0.4%, surplus Ti；
Preferably, the impurity element includes the one or more selected from following element：C、O、N、H；
Preferably, in the impurity element, if so, C≤0.04%, O≤0.15%, N≤0.04%, H≤
0.015%.
In some embodiments of the present invention, it is necessary to which the titanium alloy blank of processing is round billet or slab.
In one embodiment, water cooling refers to immerse titanium alloy blank in 15 DEG C~25 DEG C water and cooled down.
In one embodiment, air cooling refers to titanium alloy blank being placed in air and cooled down.
In one embodiment, TβRefer to alpha+beta/beta transformation point of titanium alloy.
In one embodiment, deflection refers to blank height or the ratio of length change amount and initial value.
In one embodiment, its T can be determined according to the specific composition of titanium alloyβValue.Without being limited by theory, Tβ
Value may be influenceed by elemental gas such as the nominal composition of titanium alloy and O, N.The titanium that those skilled in the art process as needed
The specific composition of alloy, it can determine the specific T of the titanium alloyβValue.
In one embodiment, in the name of chemical composition represents the composition of alloy.
In one embodiment, impurity element also contains other elements, and other elements refer to produce in titanium or titanium alloy
During intrinsic trace element, rather than the element artificially added.Other elements can include one kind or more of following element
Kind：V、Sn、Mn、Ni、Cu、Y.It is preferred that the content of single other elements is not more than 0.1 weight %, preferably Y content is not more than
0.005 weight %, the summation of preferably other elements are not more than 0.2 weight %.
In one embodiment, it is necessary to which the nominal chemical composition of the titanium alloy of processing or titanium alloy product is selected from such as following table
1~16 shown in 1：
Table 1
In one embodiment, titanium alloy product of the invention is obtained by the processing method of the present invention.
In one embodiment, it is necessary to which the titanium alloy of processing obtains the present invention after the processing method processing of the present invention
Titanium alloy product.
In one embodiment, the present invention is according to GB/T228.1-2010《Metal material stretching test part 1：Room
Warm test method》, carry out room temperature tensile properties test.Tensile strength is preferably room temperature tensile intensity, and yield strength is preferably room
Warm yield strength.
Beneficial effects of the present invention
Some embodiments of the present invention have following one or more beneficial effects：
1) titanium alloy of some embodiments has improved temperature-room type plasticity, particularly room temperature elongation percentage A%；
2) titanium alloy that the processing method of some embodiments obtains has improved temperature-room type plasticity, particularly room temperature elongation percentage
A%.
Embodiment
Below by embodiment, technical scheme is described in further detail.
Embodiment 1
Acquisition nominal composition is Ti-3.5Al-2.5Mo-2Zr-2.3Cr (percentage by weight, %) titan alloy casting ingot,
1150 DEG C of cogging forgings, obtain the bar-shaped titanium alloy blank for needing to process, Φ 160mm, the T of the titanium alloyβFor 900~915 DEG C.
1) titanium alloy blank for needing to process is heated to Tβ+ 60 DEG C, 100min is incubated, is then forged, first mushrooming deformation
50%, then deformation 50% is pulled out, input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
2) titanium alloy obtained by step 1) is heated to Tβ- 30 DEG C, 100min is incubated, is then forged, first mushrooming deformation 50%,
Deformation 50% is pulled out again, and input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
3) titanium alloy obtained by step 2) is heated to Tβ+ 20 DEG C, 80min is incubated, is then forged, first mushrooming deformation 50%,
Deformation 50% is pulled out again, and input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
4) titanium alloy obtained by step 3) is heated to Tβ- 70 DEG C, 110min is incubated, is then forged, first mushrooming deformation 50%,
Deformation 50% is pulled out again, and input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
5) titanium alloy obtained by step 4) is heated to Tβ- 100 DEG C, 130min is incubated, is then forged, first mushrooming deformation
30%, then deformation 30% is pulled out, it is placed in air and cools down after forging；
6) T is heated to titanium alloy obtained by step 5)β- 300 DEG C, 6h is incubated, then air cooling, the titanium for obtaining embodiment 1 closes
Golden product.
Embodiment 2
Acquisition nominal composition is Ti-3.7Al-3Mo-4Zr-3Cr-0.08Si (percentage by weight, %) titan alloy casting ingot,
Forged in 1150 DEG C of coggings, obtain the bar-shaped titanium alloy blank for needing to process, Φ 160mm, the T of the titanium alloyβFor 895~910
℃。
1) titanium alloy blank for needing to process is heated to Tβ+ 55 DEG C, 100min is incubated, is then forged, first mushrooming deformation
40%, then deformation 40% is pulled out, input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
2) titanium alloy obtained by step 1) is heated to Tβ- 35 DEG C, 100min is incubated, is then forged, first mushrooming deformation 40%,
Deformation 40% is pulled out again, and input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
3) titanium alloy obtained by step 2) is heated to Tβ+ 15 DEG C, 80min is incubated, is then forged, first mushrooming deformation 40%,
Deformation 40% is pulled out again, and input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
4) titanium alloy obtained by step 3) is heated to Tβ- 75 DEG C, 110min is incubated, is then forged, first mushrooming deformation 40%,
Deformation 40% is pulled out again, and input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
5) titanium alloy obtained by step 4) is heated to Tβ- 110 DEG C, 130min is incubated, is then forged, first mushrooming deformation
40%, then deformation 40% is pulled out, it is placed in air and cools down after forging；
6) T is heated to titanium alloy obtained by step 5)β- 310 DEG C, 6h is incubated, then air cooling, the titanium for obtaining embodiment 2 closes
Golden product.
Embodiment 3
Acquisition nominal composition is Ti-3Al-4Mo-3Zr-1Fe (percentage by weight, %) titan alloy casting ingot, at 1150 DEG C
Cogging is forged, and obtains the bar-shaped titanium alloy blank for needing to process, Φ 160mm, the T of the titanium alloyβFor 905~920 DEG C.
1) titanium alloy blank for needing to process is heated to Tβ+ 65 DEG C, 100min is incubated, is then forged, first mushrooming deformation
50%, then deformation 50% is pulled out, input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
2) titanium alloy obtained by step 1) is heated to Tβ- 25 DEG C, 100min is incubated, is then forged, first mushrooming deformation 50%,
Deformation 50% is pulled out again, and input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
3) titanium alloy obtained by step 2) is heated to Tβ+ 25 DEG C, 80min is incubated, is then forged, first mushrooming deformation 50%,
Deformation 50% is pulled out again, and input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
4) titanium alloy obtained by step 3) is heated to Tβ- 65 DEG C, 110min is incubated, is then forged, first mushrooming deformation 50%,
Deformation 50% is pulled out again, and input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
5) titanium alloy obtained by step 4) is heated to Tβ- 120 DEG C, 130min is incubated, is then forged, first mushrooming deformation
30%, then deformation 30% is pulled out, it is placed in air and cools down after forging；
6) T is heated to titanium alloy obtained by step 5)β- 330 DEG C, 6h is incubated, then air cooling, the titanium for obtaining embodiment 3 closes
Golden product.
Embodiment 4
Acquisition nominal composition is Ti-3Al-2.5Mo-2Zr-3Cr (percentage by weight, %) titan alloy casting ingot, 1150
DEG C cogging forging, obtains the bar-shaped titanium alloy blank for needing to process, Φ 160mm, the T of the titanium alloyβFor 885~900 DEG C.
1) titanium alloy blank for needing to process is heated to Tβ+ 55 DEG C, 100min is incubated, is then forged, first mushrooming deformation
50%, then deformation 50% is pulled out, input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
2) titanium alloy obtained by step 1) is heated to Tβ- 35 DEG C, 100min is incubated, is then forged, first mushrooming deformation 50%,
Deformation 50% is pulled out again, and input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
3) titanium alloy obtained by step 2) is heated to Tβ+ 20 DEG C, 80min is incubated, is then forged, first mushrooming deformation 50%,
Deformation 50% is pulled out again, and input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
4) titanium alloy obtained by step 3) is heated to Tβ- 75 DEG C, 110min is incubated, is then forged, first mushrooming deformation 50%,
Deformation 50% is pulled out again, and input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
5) titanium alloy obtained by step 4) is heated to Tβ- 90 DEG C, 130min is incubated, is then forged, first mushrooming deformation 30%,
Deformation 30% is pulled out again, is placed in air and is cooled down after forging；
6) T is heated to titanium alloy obtained by step 5)β- 300 DEG C, 6h is incubated, then air cooling, the titanium for obtaining embodiment 4 closes
Golden product.
Embodiment 5
Acquisition nominal composition is Ti-3.5Al-2.5Mo-3Zr-1.2Fe (percentage by weight, %) titan alloy casting ingot,
1150 DEG C of cogging forgings, obtain the bar-shaped titanium alloy blank for needing to process, Φ 160mm, the T of the titanium alloyβFor 920~935 DEG C.
1) titanium alloy blank is heated to Tβ+ 60 DEG C, 100min is incubated, is then forged, first mushrooming deformation 50%, then pull out
Deformation 50%, input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
2) titanium alloy obtained by step 1) is heated to Tβ- 30 DEG C, 100min is incubated, is then forged, first mushrooming deformation 50%,
Deformation 50% is pulled out again, and input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
3) titanium alloy obtained by step 2) is heated to Tβ+ 20 DEG C, 80min is incubated, is then forged, first mushrooming deformation 50%,
Deformation 50% is pulled out again, and input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
4) titanium alloy obtained by step 3) is heated to Tβ- 70 DEG C, 110min is incubated, is then forged, first mushrooming deformation 50%,
Deformation 50% is pulled out again, and input temperature is to be cooled down in 15 DEG C~25 DEG C of water rapidly after forging；
5) titanium alloy obtained by step 4) is heated to Tβ- 100 DEG C, 130min is incubated, is then forged, first mushrooming deformation
30%, then deformation 30% is pulled out, it is placed in air and cools down after forging；
6) T is heated to titanium alloy obtained by step 5)β- 300 DEG C, 6h is incubated, then air cooling, the titanium for obtaining embodiment 5 closes
Golden product.
Comparative example 1
Comparative example 1 is the titanium alloy product of embodiment 1 in CN102212716A.Nominal composition is Ti-3.5Al-2.5Mo-
2Zr-2.3Cr (percentage by weight, %) titanium alloy blank, in Tβ- 30~TβAfter multiple pier pulls out forging at+80 DEG C, at 650 DEG C
Insulation 1 hour, air cooling.
Analysis detection
(1) sample：The titanium alloy product that embodiment 1~5 and comparative example 1 obtain is taken at least two along charge length direction
14 × 75mm of Φ sample blank, it is processed into a diameter of 5mm of the gauge length section standard tensile specimens of δ 5.
(2) method of testing：According to GB/T228.1-2010《Metal material stretching test part 1：Room temperature test method》,
Room temperature tensile properties test has been carried out, has tested room temperature elongation percentage (elongation after fracture) A%, tensile strength Rm and yield strength
Rp0.2。
(3) test result：
Test result is referring to table 2 below：
Table 2
Above test result illustrates the titanium alloy after the inventive method is processed, there is improved temperature-room type plasticity, especially
Room temperature elongation percentage A%, tensile strength Rm and yield strength Rp0.2, particularly room temperature elongation percentage A%, it is significantly higher than patent
CN102212716A embodiment 1.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
The embodiment of the present invention can be modified or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical scheme, it all should cover among the claimed technical scheme scope of the present invention.
Claims (14)
1. a kind of titanium alloy, the composition of the titanium alloy contains by weight：
Al：3%~3.7%；
Mo：2.5%~4%；
Zr：2%~4%；
Si：0%~0.35%；
M：M is Cr and/or Fe, if M is Cr, Cr content is 2.3%~3.3%, if M is Fe, Fe content is 0.4%
~1.2%, if M is made up of Cr and Fe, Cr and Fe total contents are 0.4%~3.3%；
Impurity element total amount≤0.4%, surplus Ti；
The room temperature elongation percentage of the titanium alloy is 30~70%, preferably 30~60%, further preferably 40~60%；
Preferably, the tensile strength Rm of the titanium alloy is 875~950MPa, preferably 880~920MPa；
Preferably, the yield strength Rp of the titanium alloy0.2For 960~1100MPa, preferably 965~995MPa.
2. the titanium alloy of claim 1, the titanium alloy has following one or more features：
A) Si content is 0%~0.1%；
If b) M is Cr, Cr content is 2.3%~3%；
If c) M is Fe, Fe content is 1%~1.2%；
If d) M is made up of Cr and Fe, Cr and Fe total contents are 1%~3%.
3. the titanium alloy of claim 1 or 2, the impurity element includes the one or more selected from following element：C、O、N、H；
Preferably, in the impurity element, if so, C≤0.04%, O≤0.15%, N≤0.04%, H≤0.015%.
4. a kind of method of machining titanium alloy, 1)~6 it comprises the following steps):
1) titanium alloy for needing to process is heated to Tβ+ 50~Tβ+ 70 DEG C, insulation, then forge, cool down；
2) titanium alloy obtained by step 1) is heated to Tβ- 40~Tβ- 20 DEG C, insulation, then forge, cool down；
3) titanium alloy obtained by step 2) is heated to Tβ+ 10~Tβ+ 30 DEG C, insulation, then forge, cool down；
4) titanium alloy obtained by step 3) is heated to Tβ- 80~Tβ- 60 DEG C, insulation, then forge, cool down；
5) titanium alloy obtained by step 4) is heated to Tβ- 130~Tβ- 80 DEG C, insulation, then forge, cool down.
6) titanium alloy obtained by step 5) is heated to Tβ- 350 DEG C~Tβ- 300 DEG C, it is incubated, cooling.
5. the method for the machining titanium alloy of claim 4, it has following one or more features：
E) wherein step 1), it would be desirable to which the titanium alloy of processing is heated to Tβ+ 55~Tβ+ 65 DEG C, insulation, then forge, cool down；
F) wherein step 2), titanium alloy obtained by step 1) is heated to Tβ- 35~Tβ- 25 DEG C, insulation, then forge, cool down；
G) wherein step 3), titanium alloy obtained by step 2) is heated to Tβ+ 15~Tβ+ 25 DEG C, insulation, then forge, cool down；
H) wherein step 4), titanium alloy obtained by step 3) is heated to Tβ- 75~Tβ- 65 DEG C, insulation, then forge, cool down；
I) wherein step 5), titanium alloy obtained by step 4) is heated to Tβ- 120~Tβ- 90 DEG C, insulation, then forge, cool down；
J) wherein step 6), titanium alloy obtained by step 5) is heated to Tβ- 340~Tβ- 310 DEG C, it is incubated, cooling.
6. the method for the machining titanium alloy of claim 4, it has following one or more features：
K) wherein step 1), it would be desirable to which the titanium alloy of processing is heated to Tβ+ 60 DEG C, insulation, then forge, cool down；
L) wherein step 2) includes：Titanium alloy obtained by step 1) is heated to Tβ- 30 DEG C, insulation, then forge, cool down；
M) wherein step 3) includes：Titanium alloy obtained by step 2) is heated to Tβ+ 20 DEG C, insulation, then forge, cool down；
N) wherein step 4) includes：Titanium alloy obtained by step 3) is heated to Tβ- 70 DEG C, insulation, then forge, cool down；
O) wherein step 5) includes：Titanium alloy obtained by step 4) is heated to Tβ- 115~Tβ- 105 DEG C, insulation, then forge, it is cold
But；
P) wherein step 6) includes：Titanium alloy obtained by step 5) is heated to Tβ- 330~Tβ- 320 DEG C, it is incubated, cooling.
7. the method for the machining titanium alloy of any one of claim 4~5, it has following one or more features：
Q) wherein step 1), the time of insulation is 0.5D~0.7D minutes；
R) wherein step 2), the time of insulation is 0.5D~0.7D minutes；
S) wherein step 3), the time of insulation is 0.4D~0.6D minutes；
T) wherein step 4), the time of insulation is 0.6D~0.8D minutes；
U) wherein step 5), the time of insulation is 0.7D~0.9D minutes；
V) wherein step 6), the time of insulation is 6~8 hours；
In terms of millimeter, D is the diameter of titanium alloy or the value of thickness.
8. the method for the machining titanium alloy of claim 4, the forging includes：
One or many Upsettings is carried out to titanium alloy, and
One or many pulling deformations；
Preferably, the forging includes carrying out titanium alloy successively Upsetting and once pulling deformation；
Preferably, titanium alloy is bar-shaped, and Upsetting and pulling deformation are all the axis directions along the bar-shaped titanium alloy.
9. the deflection of the method for the machining titanium alloy of claim 8, Upsetting and/or pulling deformation is 30~50%；
Preferably, step 1)~4) in, the deflection of Upsetting and/or pulling deformation is 40~50%
Preferably, in step 5), the deflection of Upsetting and/or pulling deformation is 30~40%.
10. the method for the machining titanium alloy of claim 4, described to be cooled to water cooling or air cooling,
Preferably, step 1)~4), the mode of cooling is water cooling；
Preferably, step 5)~6), the mode of cooling is air cooling.
11. the method for the machining titanium alloy of claim 4 is, it is necessary to the titanium alloy of processing is titanium alloy after cogging is forged,：
Preferably, cogging forging is that titanium alloy raw material (such as titan alloy casting ingot) is heated into 1150 DEG C, insulation, is then forged,
Cooling；
Forging preferably includes 1 Upsetting and 1 pulling deformation.
12. the method for the machining titanium alloy of any one of claim 4~11, the composition of the titanium alloy for needing to process contain with
Weight meter：
Al：3%~3.7%；
Mo：2.5%~4%；
Zr：2%~4%；
Si：0%~0.35%；
M：M is Cr and/or Fe, if M is Cr, Cr content is 2.3%~3.3%, if M is Fe, Fe content is 0.4%
~1.2%, if M is made up of Cr and Fe, Cr and Fe total contents are 0.4%~3.3%；With
Impurity element total amount≤0.4%, surplus Ti；
Preferably, the impurity element includes the one or more selected from following element：C、O、N、H；
Preferably, in the impurity element, if so, C≤0.04%, O≤0.15%, N≤0.04%, H≤0.015%.
13. a kind of titanium alloy, it is obtained by the method for any one of claim 4~12.
14. the titanium alloy of claim 14, the composition of the titanium alloy contains by weight：
Al：3%~3.7%；
Mo：2.5%~4%；
Zr：2%~4%；
Si：0%~0.35%；
M：M is Cr and/or Fe, if M is Cr, Cr content is 2.3%~3.3%, if M is Fe, Fe content is 0.4%
~1.2%, if M is made up of Cr and Fe, Cr and Fe total contents are 0.4%~3.3%；With
Impurity element total amount≤0.4%, surplus Ti；
Preferably, the impurity element includes the one or more selected from following element：C、O、N、H；
Preferably, in the impurity element, if so, C≤0.04%, O≤0.15%, N≤0.04%, H≤0.015%.
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| CN109161727A (en) * | 2018-10-19 | 2019-01-08 | 中国航发北京航空材料研究院 | A kind of electric arc/electron beam fuse increasing material manufacturing titanium alloy and preparation method thereof |
| CN112589383A (en) * | 2020-11-24 | 2021-04-02 | 宁波江丰电子材料股份有限公司 | Method for preparing wafer locking ring |
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| CN102212716A (en) * | 2011-05-06 | 2011-10-12 | 中国航空工业集团公司北京航空材料研究院 | Low-cost alpha and beta-type titanium alloy |
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| CN102212716A (en) * | 2011-05-06 | 2011-10-12 | 中国航空工业集团公司北京航空材料研究院 | Low-cost alpha and beta-type titanium alloy |
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| CN109161727A (en) * | 2018-10-19 | 2019-01-08 | 中国航发北京航空材料研究院 | A kind of electric arc/electron beam fuse increasing material manufacturing titanium alloy and preparation method thereof |
| CN112589383A (en) * | 2020-11-24 | 2021-04-02 | 宁波江丰电子材料股份有限公司 | Method for preparing wafer locking ring |
| CN112589383B (en) * | 2020-11-24 | 2022-05-24 | 宁波江丰电子材料股份有限公司 | Method for preparing wafer locking ring |
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