CN105018793A - Heat-resistant Ti alloy - Google Patents
Heat-resistant Ti alloy Download PDFInfo
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- CN105018793A CN105018793A CN201510542165.6A CN201510542165A CN105018793A CN 105018793 A CN105018793 A CN 105018793A CN 201510542165 A CN201510542165 A CN 201510542165A CN 105018793 A CN105018793 A CN 105018793A
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Abstract
The invention discloses a heat-resistant Ti alloy. The heat-resistant Ti alloy comprises components in percentage by mass as follows: 10.0%-12.0% of Al, 5.0%-6.0% of Nb, 3.0%-4.0% of Zr, 1.5%-2.5% of Mo, 1.5%-2.5% of Sn, 0.5%-1% of Ta, 0.2%-0.4% of Si, 0.04%-0.08% of C and the balance of Ti and inevitable impurities. The content of Al in the heat-resistant Ti alloy is between the content of Al in a traditional heat-resistant Ti alloy and the content of Al in a Ti-Al intermediate compound alloy, the usage temperature of the Ti alloy is increased by appropriately sacrificing plasticity of the traditional heat-resistant Ti alloy, and the heat-resistant Ti alloy has the good comprehensive performance and can meet requirements for long-term usage at the temperature of 650 DEG C.
Description
Technical field
The invention belongs to titanium materials technology field, be specifically related to a kind of heat-resistant titanium alloy.
Background technology
The research of heat-resistant titanium alloy, it is one of of paramount importance direction, titanium alloy field, the diskware of its pneumatic plant mainly for the manufacture of aircraft engine and fan, the part such as blade and casing, replace steel or superalloy, the weight of engine can be alleviated more significantly, improve the thrust-weight ratio of engine.Both at home and abroad mainly comprise two each and every one aspects to heat-resistant titanium alloy research, one is the nearly α alloy of Ti-Al-Sn-Zr-Mo-Si system, and one is Ti-Al intermetallic alloy.Conventional Ti-Al-Sn-Zr-Mo-Si system the heat-resistant titanium alloy being representative with Ti-1100, IMI834 and Ti60 alloy develops comparatively ripe at present, its Al constituent content is generally no more than 7wt.%, associated alloys is applied in aircraft engine, but the current maximum operation (service) temperature of such alloy is 600 DEG C, use cannot be met more than the heat resistance of 600 DEG C of alloys.Although Ti-Al intermediate compound alloy is the highest can be used in 700 DEG C, because its Al content is very high, generally all more than 20wt.%, alloy has lower plasticity, poor processability, and manufacturing cost is high.So there is no at present have obviously processing and performance advantage can under 650 DEG C of conditions the heat-resistant titanium alloy of life-time service.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, a kind of heat-resistant titanium alloy is provided, between the aluminium content of aluminium content in this heat-resistant titanium alloy in traditional heat-resistant titanium alloy and the aluminium content in Ti-Al intermediate compound alloy, by sacrificing the plasticity of traditional heat-resistant titanium alloy in right amount, improve the use temperature of titanium alloy, and this heat-resistant titanium alloy has good over-all properties, the requirement of life-time service under 650 DEG C of conditions can be met.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of heat-resistant titanium alloy, is characterized in that, is grouped into by the one-tenth of following weight percentage: Al 10.0% ~ 12.0%, Nb5.0% ~ 6.0%, Zr 3.0% ~ 4.0%, Mo 1.5% ~ 2.5%, Sn 1.5% ~ 2.5%, Ta 0.5% ~ 1%, Si0.2% ~ 0.4%, C 0.04% ~ 0.08%, surplus is Ti and inevitable impurity, wherein, the weight percentage of Al is 2 times of the weight percentage of Nb, and the weight percentage of Al is the weight percentage of Nb, the weight percentage of Zr and the weight percentage sum of Mo, described heat-resistant titanium alloy tensile strength is at ambient temperature not less than 1100MPa, unit elongation is not less than 5.0%, described heat-resistant titanium alloy is that tensile strength under 650 DEG C of conditions is not less than 640MPa in temperature, unit elongation is not less than 15%, described heat-resistant titanium alloy is 150MPa at stress, temperature is that the remaining deformation after keeping 100h under the condition of 650 DEG C is not more than 0.2%.
Above-mentioned a kind of heat-resistant titanium alloy, it is characterized in that, be grouped into by the one-tenth of following weight percentage: Al 10.5% ~ 11.5%, Nb 5.2% ~ 5.8%, Zr 3.2% ~ 3.7%, Mo 1.8% ~ 2.2%, Sn1.7% ~ 2.2%, Ta 0.6% ~ 0.9%, Si 0.3%, C 0.05% ~ 0.07%, surplus is Ti and inevitable impurity.
Above-mentioned a kind of heat-resistant titanium alloy, is characterized in that, is grouped into by the one-tenth of following weight percentage: Al 10%, Nb 5%, Zr 3%, Mo 2%, Sn 1.5%, Ta 0.5%, Si 0.2%, C 0.04%, surplus is Ti and inevitable impurity.
Above-mentioned a kind of heat-resistant titanium alloy, is characterized in that, is grouped into by the one-tenth of following weight percentage: Al 12%, Nb 6%, Zr 4%, Mo 2%, Sn 2.5%, Ta 1.0%, Si 0.4%, C 0.08%, surplus is Ti and inevitable impurity.
Above-mentioned a kind of heat-resistant titanium alloy, is characterized in that, is grouped into by the one-tenth of following weight percentage: Al 11%, Nb 5.5%, Zr 3.5%, Mo 2%, Sn 2.0%, Ta 0.75%, Si 0.3%, C0.06%, surplus is Ti and inevitable impurity.
The present invention compared with prior art has the following advantages:
1, between the aluminium content of the aluminium content in heat-resistant titanium alloy of the present invention in traditional heat-resistant titanium alloy and the aluminium content in Ti-Al intermediate compound alloy, by sacrificing the plasticity of traditional heat-resistant titanium alloy in right amount, improve the use temperature of titanium alloy, and this heat-resistant titanium alloy has good over-all properties, the requirement of life-time service under 650 DEG C of conditions can be met.
2, relative to traditional Ti-Al-Sn-Zr-Mo-Si system heat-resistant titanium alloy, heat-resistant titanium alloy of the present invention suitably improves the content of Al element, the raising of Al constituent content can improve the transformation temperature of titanium alloy, reduce the content of remaining β phase, reduce the diffusion in titanium alloy high-temperature creep process, improve the high-temperature creep resistance of titanium alloy; Meanwhile, the raising of Al constituent content, generates the Al more with stable provide protection at titanium alloy surface under making hot conditions
2o
3protective membrane, improves the surface oxidation-resistant of heat-resistant titanium alloy.Although the raising of Al constituent content, more Ti may be generated
3al ordered phase, reduces the plasticity of titanium alloy, but in the present invention can effective control Ti in Al element content range
3the formation of Al ordered phase, makes its disadvantageous effect be effectively controlled, and simultaneously in conjunction with the malleableize effect of other elements, titanium alloy can be made to have good plasticity, if Al constituent content exceeds the content range in the present invention, the plasticity of titanium alloy will sharply reduce.
3, add Nb, Zr and Mo in heat-resistant titanium alloy of the present invention, these three kinds of elements are added in titanium alloy according to the design proportioning in the present invention, not only have good solid solution strengthening effect, and can effective tough alloy, make because Al element is higher and generate Ti
3the disadvantageous effect of Al ordered phase is reduced to controllable degree, thus makes heat-resistant titanium alloy obtain the coupling of good intensity, plasticity and high-temperature behavior.
4, add the effect that Sn and Ta mainly plays solution strengthening in the present invention, make it have better solid solution strengthening effect according to design proportioning of the present invention, the Si element simultaneously adding specific proportioning can well ensure the high temperature creep property of heat-resistant titanium alloy.
5, the temperature range adding the alpha+beta two-phase region that can increase in heat-resistant titanium alloy of C element in the present invention, increase the processing temperature window of alloy, the content of control primary alpha phase that can be relatively easy, further by thermal treatment, the mixed structure with 15% ~ 25% primary alpha phase can be obtained, the thermal stability of effective coordination titanium alloy, creep property and fatigue property, improve the comprehensive mechanical property of heat-resistant titanium alloy.
In heat-resistant titanium alloy of the present invention, the content of α phase is volumn concentration.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the micro-organization chart of heat-resistant titanium alloy prepared by the embodiment of the present invention 1.
Fig. 2 is the micro-organization chart of heat-resistant titanium alloy prepared by the embodiment of the present invention 2.
Fig. 3 is the micro-organization chart of heat-resistant titanium alloy prepared by the embodiment of the present invention 3.
Fig. 4 is the micro-organization chart of heat-resistant titanium alloy prepared by the embodiment of the present invention 4.
Embodiment
Heat-resistant titanium alloy of the present invention is grouped into by the one-tenth of following weight percentage: Al 10.0% ~ 12.0%, Nb 5.0% ~ 6.0%, Zr 3.0% ~ 4.0%, Mo 1.5% ~ 2.5%, Sn 1.5% ~ 2.5%, Ta 0.5% ~ 1%, Si 0.2% ~ 0.4%, C 0.04% ~ 0.08%, surplus is Ti and inevitable impurity, wherein, the weight percentage of Al is 2 times of the weight percentage of Nb, and the weight percentage of Al is the weight percentage sum of the weight percentage of Nb, the weight percentage of Zr and Mo.
Prepare the raw material that heat-resistant titanium alloy of the present invention adopts and comprise Al-Mo master alloy, Al-Nb master alloy, Al-Sn master alloy, zirconium sponge, pure tantalum powder (quality purity is not less than 99.7%), aluminium shot and 0 grade of titanium sponge.
The preparation process of heat-resistant titanium alloy of the present invention is: compacting after above-mentioned raw materials mixing is obtained electrode, electrode prepares alloy cast ingot through vacuum consumable arc-melting, alloy cast ingot is after surface strips off the skin and cuts rising head and tail end, the open die forging such as hydrostatic forging machine or forging hammer equipment carries out cogging forging and many fire time high temperature forgings, then be rolled on hot rolls, then obtain heat-resistant titanium alloy after solution treatment and ageing treatment.The Heating temperature of described cogging forging is 1150 DEG C ~ 1250 DEG C, the forging temperature of many fire time high temperature forging is 1000 DEG C ~ 1100 DEG C, the temperature of described rolling is 1000 DEG C ~ 1100 DEG C, described cogging forging and every fire time described high temperature forging are two piers two and pull out forging, the temperature of described solution treatment is 1000 DEG C ~ 1050 DEG C, soaking time is 2h ~ 3h, and the temperature of ageing treatment is 700 DEG C ~ 750 DEG C, and soaking time is 2.5h ~ 4.5h.Heat-resistant titanium alloy of the present invention tensile strength is at ambient temperature not less than 1100MPa, unit elongation is not less than 5.0%, described heat-resistant titanium alloy is that tensile strength under 650 DEG C of conditions is not less than 640MPa in temperature, unit elongation is not less than 15%, described heat-resistant titanium alloy is 150MPa at stress, temperature is that the remaining deformation after keeping 100h under the condition of 650 DEG C is not more than 0.2%, has good room-temperature property and mates with high-temperature behavior.
Embodiment 1
The present embodiment heat-resistant titanium alloy, is grouped into by the one-tenth of following weight percentage: Al 10.0%, Nb5.0%, Zr 3.0%, Mo 2.0%, Sn 1.5%, Ta 0.5%, Si 0.2%, C 0.04%, surplus is Ti and inevitable impurity.
The preparation method of the present embodiment heat-resistant titanium alloy is: raw material adopts Al-Mo master alloy, Al-Nb master alloy, Al-Sn master alloy, zirconium sponge, pure tantalum powder (quality purity is not less than 99.7%), aluminium shot and 0 grade of titanium sponge, above-mentioned raw materials is mixed rear compacting and obtain electrode, electrode prepares alloy cast ingot through vacuum consumable arc-melting, alloy cast ingot is after surface strips off the skin and cuts rising head and tail end, hydrostatic forging machine carries out cogging forging and 2 fire time high temperature forgings, then be rolled on hot rolls, after solution treatment and ageing treatment, obtain cross section is again circular heat-resistant titanium alloy bar, the cross-sectional diameter of described heat-resistant titanium alloy bar is 14mm.The Heating temperature of described cogging forging is 1150 DEG C, and the forging temperature of 2 fire time high temperature forgings is 1000 DEG C, and the temperature of described rolling is 1000 DEG C, and described cogging forging and every fire time described high temperature forging are two piers two and pull out forging; The temperature of described solution treatment is 1000 DEG C, and soaking time is 2h, and the temperature of described ageing treatment is 700 DEG C, and soaking time is 2.5h.
As can be seen from Figure 1, heat-resistant titanium alloy prepared by the present embodiment is typical bifurcation tissue, and primary alpha phase content is about 28%, and homogeneity of structure is good; The present embodiment heat-resistant titanium alloy bar tensile strength at ambient temperature after solution treatment and ageing treatment is 1135MPa, unit elongation is 6.5%, the tensile strength of this heat-resistant titanium alloy bar under temperature is 650 DEG C of conditions is 650MPa, unit elongation is 24%, this heat-resistant titanium alloy bar is 150MPa at stress, temperature is the remaining deformation after keeping 100h under the condition of 650 DEG C is 0.166%, illustrates that this heat-resistant titanium alloy has good room-temperature property and mates with high-temperature behavior.
Embodiment 2
The present embodiment heat-resistant titanium alloy, is grouped into by the one-tenth of following weight percentage: Al 11.0%, Nb5.5%, Zr 3.5%, Mo 2.0%, Sn 2.0%, Ta 0.75%, Si 0.3%, C 0.06%, surplus is Ti and inevitable impurity.
The preparation method of the present embodiment heat-resistant titanium alloy is: raw material adopts Al-Mo master alloy, Al-Nb master alloy, Al-Sn master alloy, zirconium sponge, pure tantalum powder (quality purity is not less than 99.7%), aluminium shot and 0 grade of titanium sponge, above-mentioned raw materials is mixed rear compacting and obtain electrode, electrode prepares alloy cast ingot through vacuum consumable arc-melting, alloy cast ingot is after surface strips off the skin and cuts rising head and tail end, hydrostatic forging machine carries out cogging forging and 2 fire time high temperature forgings, then be rolled on hot rolls, after solution treatment and ageing treatment, obtain cross section is again circular heat-resistant titanium alloy bar, the cross-sectional diameter of described heat-resistant titanium alloy bar is 13mm.The Heating temperature of described cogging forging is 1200 DEG C, and the forging temperature of 2 fire time high temperature forgings is 1050 DEG C, and the temperature of described rolling is 1050 DEG C, and described cogging forging and every fire time described high temperature forging are two piers two and pull out forging; The temperature of described solution treatment is 1050 DEG C, and soaking time is 2.5h, and the temperature of described ageing treatment is 725 DEG C, and soaking time is 3.5h.
As can be seen from Figure 2, heat-resistant titanium alloy prepared by the present embodiment is typical bifurcation tissue, and primary alpha phase content is about 22%, and homogeneity of structure is good; The present embodiment heat-resistant titanium alloy bar tensile strength at ambient temperature after solution treatment and ageing treatment is 1160MPa, unit elongation is 6.0%, the tensile strength of this heat-resistant titanium alloy bar under temperature is 650 DEG C of conditions is 660MPa, unit elongation is 20%, this heat-resistant titanium alloy bar is 150MPa at stress, temperature is the remaining deformation after keeping 100h under the condition of 650 DEG C is 0.158%, illustrates that this heat-resistant titanium alloy has good room-temperature property and mates with high-temperature behavior.
Embodiment 3
The present embodiment heat-resistant titanium alloy, is grouped into by the one-tenth of following weight percentage: Al 12.0%, Nb6.0%, Zr 4.0%, Mo 2.0%, Sn 2.5%, Ta 1.0%, Si 0.4%, C 0.08%, surplus is Ti and inevitable impurity.
The preparation method of the present embodiment heat-resistant titanium alloy is: raw material adopts Al-Mo master alloy, Al-Nb master alloy, Al-Sn master alloy, zirconium sponge, pure tantalum powder (quality purity is not less than 99.7%), aluminium shot and 0 grade of titanium sponge, above-mentioned raw materials is mixed rear compacting and obtain electrode, electrode prepares alloy cast ingot through vacuum consumable arc-melting, alloy cast ingot is after surface strips off the skin and cuts rising head and tail end, forging hammer carries out cogging forging and 2 fire time high temperature forgings, then be rolled on hot rolls, after solution treatment and ageing treatment, obtain cross section is again circular heat-resistant titanium alloy bar, the cross-sectional diameter of described heat-resistant titanium alloy bar is 14mm.The Heating temperature of described cogging forging is 1250 DEG C, and the forging temperature of 2 fire time high temperature forgings is 1100 DEG C, and the temperature of described rolling is 1100 DEG C, and described cogging forging and every fire time described high temperature forging are two piers two and pull out forging; The temperature of described solution treatment is 1050 DEG C, and soaking time is 3.0h, and the temperature of described ageing treatment is 750 DEG C, and soaking time is 4.5h.
As can be seen from Figure 3, heat-resistant titanium alloy prepared by the present embodiment is typical bifurcation tissue, and primary alpha phase content is about 22%, and homogeneity of structure is good; The present embodiment heat-resistant titanium alloy bar tensile strength at ambient temperature after solution treatment and ageing treatment is 1185MPa, unit elongation is 5.5%, the tensile strength of this heat-resistant titanium alloy bar under temperature is 650 DEG C of conditions is 675MPa, unit elongation is 18%, this heat-resistant titanium alloy bar is 150MPa at stress, temperature is the remaining deformation after keeping 100h under the condition of 650 DEG C is 0.137%, illustrates that this heat-resistant titanium alloy has good room-temperature property and mates with high-temperature behavior.
Embodiment 4
The present embodiment heat-resistant titanium alloy, is grouped into by the one-tenth of following weight percentage: Al 10.5%, Nb5.5%, Zr 3.2%, Mo 1.8%, Sn 2.2%, Ta 0.9%, Si 0.3%, C 0.07%, surplus is Ti and inevitable impurity.
The preparation method of the present embodiment heat-resistant titanium alloy is: raw material adopts Al-Mo master alloy, Al-Nb master alloy, Al-Sn master alloy, zirconium sponge, pure tantalum powder (quality purity is not less than 99.7%), aluminium shot and 0 grade of titanium sponge, above-mentioned raw materials is mixed rear compacting and obtain electrode, electrode prepares alloy cast ingot through vacuum consumable arc-melting, alloy cast ingot is after surface strips off the skin and cuts rising head and tail end, forging hammer carries out cogging forging and 2 fire time high temperature forgings, then be rolled on hot rolls, after solution treatment and ageing treatment, obtain cross section is again circular heat-resistant titanium alloy bar, the cross-sectional diameter of described heat-resistant titanium alloy bar is 12mm.The Heating temperature of described cogging forging is 1170 DEG C, and the forging temperature of 2 fire time high temperature forgings is 1050 DEG C, and the temperature of described rolling is 1070 DEG C, and described cogging forging and every fire time described high temperature forging are two piers two and pull out forging; The temperature of described solution treatment is 1010 DEG C, and soaking time is 2.5h, and the temperature of described ageing treatment is 750 DEG C, and soaking time is 4h.
As can be seen from Figure 4, heat-resistant titanium alloy prepared by the present embodiment is typical bifurcation tissue, and primary alpha phase content is about 30%, and homogeneity of structure is good; The present embodiment heat-resistant titanium alloy bar tensile strength at ambient temperature after solution treatment and ageing treatment is 1170MPa, unit elongation is 6.0%, the tensile strength of this heat-resistant titanium alloy bar under temperature is 650 DEG C of conditions is 670MPa, unit elongation is 18%, this heat-resistant titanium alloy bar is 150MPa at stress, temperature is the remaining deformation after keeping 100h under the condition of 650 DEG C is 0.145%, illustrates that this heat-resistant titanium alloy has good room-temperature property and mates with high-temperature behavior.
Embodiment 5
The present embodiment heat-resistant titanium alloy, is grouped into by the one-tenth of following weight percentage: Al 11.5%, Nb5.6%, Zr 3.7%, Mo 2.2%, Sn 1.7%, Ta 0.6%, Si 0.3%, C 0.05%, surplus is Ti and inevitable impurity.
The preparation method of the present embodiment heat-resistant titanium alloy is: raw material adopts Al-Mo master alloy, Al-Nb master alloy, Al-Sn master alloy, zirconium sponge, pure tantalum powder (quality purity is not less than 99.7%), aluminium shot and 0 grade of titanium sponge, above-mentioned raw materials is mixed rear compacting and obtain electrode, electrode prepares alloy cast ingot through vacuum consumable arc-melting, alloy cast ingot is after surface strips off the skin and cuts rising head and tail end, hydrostatic forging machine carries out cogging forging and 2 fire time high temperature forgings, then be rolled on hot rolls, after solution treatment and ageing treatment, obtain cross section is again circular heat-resistant titanium alloy bar, the cross-sectional diameter of described heat-resistant titanium alloy bar is 16mm.The Heating temperature of described cogging forging is 1200 DEG C, and the forging temperature of 2 fire time high temperature forgings is 1070 DEG C, and the temperature of described rolling is 1030 DEG C, and described cogging forging and every fire time described high temperature forging are two piers two and pull out forging; The temperature of described solution treatment is 1040 DEG C, and soaking time is 2.8h, and the temperature of described ageing treatment is 700 DEG C, and soaking time is 4.5h.
Heat-resistant titanium alloy prepared by the present embodiment is typical bifurcation tissue, and homogeneity of structure is good; The present embodiment heat-resistant titanium alloy bar tensile strength at ambient temperature after solution treatment and ageing treatment is 1180MPa, unit elongation is 5.5%, the tensile strength of this heat-resistant titanium alloy bar under temperature is 650 DEG C of conditions is 670MPa, unit elongation is 16.5%, this heat-resistant titanium alloy bar is 150MPa at stress, temperature is the remaining deformation after keeping 100h under the condition of 650 DEG C is 0.165%, illustrates that this heat-resistant titanium alloy has good room-temperature property and mates with high-temperature behavior.
Embodiment 6
The present embodiment heat-resistant titanium alloy, is grouped into by the one-tenth of following weight percentage: Al 11%, Nb5.2%, Zr 3.3%, Mo 2.5%, Sn 2.0%, Ta 0.7%, Si 0.3%, C 0.06%, surplus is Ti and inevitable impurity.
The preparation method of the present embodiment heat-resistant titanium alloy is: raw material adopts Al-Mo master alloy, Al-Nb master alloy, Al-Sn master alloy, zirconium sponge, pure tantalum powder (quality purity is not less than 99.7%), aluminium shot and 0 grade of titanium sponge, above-mentioned raw materials is mixed rear compacting and obtain electrode, electrode prepares alloy cast ingot through vacuum consumable arc-melting, alloy cast ingot is after surface strips off the skin and cuts rising head and tail end, hydrostatic forging machine carries out cogging forging and 2 fire time high temperature forgings, then be rolled on hot rolls, after solution treatment and ageing treatment, obtain cross section is again circular heat-resistant titanium alloy bar, the cross-sectional diameter of described heat-resistant titanium alloy bar is 14mm.The Heating temperature of described cogging forging is 1250 DEG C, and the forging temperature of 2 fire time high temperature forgings is 1100 DEG C, and the temperature of described rolling is 1100 DEG C, and described cogging forging and every fire time described high temperature forging are two piers two and pull out forging; The temperature of described solution treatment is 1000 DEG C, and soaking time is 3h, and the temperature of described ageing treatment is 750 DEG C, and soaking time is 2.5h.
Heat-resistant titanium alloy prepared by the present embodiment is typical bifurcation tissue, and homogeneity of structure is good; The present embodiment heat-resistant titanium alloy bar tensile strength at ambient temperature after solution treatment and ageing treatment is 1150MPa, unit elongation is 6%, the tensile strength of this heat-resistant titanium alloy bar under temperature is 650 DEG C of conditions is 670MPa, unit elongation is 15.5%, this heat-resistant titanium alloy bar is 150MPa at stress, temperature is the remaining deformation after keeping 100h under the condition of 650 DEG C is 0.155%, illustrates that this heat-resistant titanium alloy has good room-temperature property and mates with high-temperature behavior.
Embodiment 7
The present embodiment heat-resistant titanium alloy, is grouped into by the one-tenth of following weight percentage: Al 11%, Nb5.8%, Zr 3.7%, Mo 1.5%, Sn 2.0%, Ta 0.8%, Si 0.3%, C 0.06%, surplus is Ti and inevitable impurity.
The preparation method of the present embodiment heat-resistant titanium alloy is: raw material adopts Al-Mo master alloy, Al-Nb master alloy, Al-Sn master alloy, zirconium sponge, pure tantalum powder (quality purity is not less than 99.7%), aluminium shot and 0 grade of titanium sponge, above-mentioned raw materials is mixed rear compacting and obtain electrode, electrode prepares alloy cast ingot through vacuum consumable arc-melting, alloy cast ingot is after surface strips off the skin and cuts rising head and tail end, forging hammer carries out cogging forging and 2 fire time high temperature forgings, then be rolled on hot rolls, after solution treatment and ageing treatment, obtain cross section is again circular heat-resistant titanium alloy bar, the cross-sectional diameter of described heat-resistant titanium alloy bar is 16mm.The Heating temperature of described cogging forging is 1150 DEG C, and the forging temperature of 2 fire time high temperature forgings is 1100 DEG C, and the temperature of described rolling is 1050 DEG C, and described cogging forging and every fire time described high temperature forging are two piers two and pull out forging; The temperature of described solution treatment is 1020 DEG C, and soaking time is 2.5h, and the temperature of described ageing treatment is 730 DEG C, and soaking time is 3.5h.
Heat-resistant titanium alloy prepared by the present embodiment is typical bifurcation tissue, and homogeneity of structure is good; The present embodiment heat-resistant titanium alloy bar tensile strength at ambient temperature after solution treatment and ageing treatment is 1145MPa, unit elongation is 5.5%, the tensile strength of this heat-resistant titanium alloy bar under temperature is 650 DEG C of conditions is 645MPa, unit elongation is 17.5%, this heat-resistant titanium alloy bar is 150MPa at stress, temperature is the remaining deformation after keeping 100h under the condition of 650 DEG C is 0.135%, illustrates that this heat-resistant titanium alloy has good room-temperature property and mates with high-temperature behavior.
Embodiment 8
The present embodiment heat-resistant titanium alloy, is grouped into by the one-tenth of following weight percentage: Al 11%, Nb5.2%, Zr 3.7%, Mo 2.1%, Sn 2.0%, Ta 0.8%, Si 0.3%, C 0.06%, surplus is Ti and inevitable impurity.
The preparation method of the present embodiment heat-resistant titanium alloy is: raw material adopts Al-Mo master alloy, Al-Nb master alloy, Al-Sn master alloy, zirconium sponge, pure tantalum powder (quality purity is not less than 99.7%), aluminium shot and 0 grade of titanium sponge, above-mentioned raw materials is mixed rear compacting and obtain electrode, electrode prepares alloy cast ingot through vacuum consumable arc-melting, alloy cast ingot is after surface strips off the skin and cuts rising head and tail end, hydrostatic forging machine carries out cogging forging and 2 fire time high temperature forgings, then be rolled on hot rolls, after solution treatment and ageing treatment, obtain cross section is again circular heat-resistant titanium alloy bar, the cross-sectional diameter of described heat-resistant titanium alloy bar is 14mm.The Heating temperature of described cogging forging is 1160 DEG C, and the forging temperature of 2 fire time high temperature forgings is 1050 DEG C, and the temperature of described rolling is 1050 DEG C, and described cogging forging and every fire time described high temperature forging are two piers two and pull out forging; The temperature of described solution treatment is 1000 DEG C, and soaking time is 3h, and the temperature of described ageing treatment is 700 DEG C, and soaking time is 3h.
Heat-resistant titanium alloy prepared by the present embodiment is typical bifurcation tissue, and homogeneity of structure is good; The present embodiment heat-resistant titanium alloy bar tensile strength at ambient temperature after solution treatment and ageing treatment is 1155MPa, unit elongation is 5.9%, the tensile strength of this heat-resistant titanium alloy bar under temperature is 650 DEG C of conditions is 671MPa, unit elongation is 15.4%, this heat-resistant titanium alloy bar is 150MPa at stress, temperature is the remaining deformation after keeping 100h under the condition of 650 DEG C is 0.153%, illustrates that this heat-resistant titanium alloy has good room-temperature property and mates with high-temperature behavior.
Embodiment 9
The present embodiment heat-resistant titanium alloy, is grouped into by the one-tenth of following weight percentage: Al 11%, Nb5.8%, Zr 3.2%, Mo2%, Sn 2.0%, Ta 0.8%, Si 0.3%, C 0.07%, and surplus is Ti and inevitable impurity.
The preparation method of the present embodiment heat-resistant titanium alloy is: raw material adopts Al-Mo master alloy, Al-Nb master alloy, Al-Sn master alloy, zirconium sponge, pure tantalum powder (quality purity is not less than 99.7%), aluminium shot and 0 grade of titanium sponge, above-mentioned raw materials is mixed rear compacting and obtain electrode, electrode prepares alloy cast ingot through vacuum consumable arc-melting, alloy cast ingot is after surface strips off the skin and cuts rising head and tail end, hydrostatic forging machine carries out cogging forging and 2 fire time high temperature forgings, then be rolled on hot rolls, after solution treatment and ageing treatment, obtain cross section is again circular heat-resistant titanium alloy bar, the cross-sectional diameter of described heat-resistant titanium alloy bar is 16mm.The Heating temperature of described cogging forging is 1250 DEG C, and the forging temperature of 2 fire time high temperature forgings is 1100 DEG C, and the temperature of described rolling is 1100 DEG C, and described cogging forging and every fire time described high temperature forging are two piers two and pull out forging; The temperature of described solution treatment is 1030 DEG C, and soaking time is 2h, and the temperature of described ageing treatment is 700 DEG C, and soaking time is 4.5h.
Heat-resistant titanium alloy prepared by the present embodiment is typical bifurcation tissue, and homogeneity of structure is good; The present embodiment heat-resistant titanium alloy bar tensile strength at ambient temperature after solution treatment and ageing treatment is 1147MPa, unit elongation is 5.2%, the tensile strength of this heat-resistant titanium alloy bar under temperature is 650 DEG C of conditions is 640MPa, unit elongation is 17.1%, this heat-resistant titanium alloy bar is 150MPa at stress, temperature is the remaining deformation after keeping 100h under the condition of 650 DEG C is 0.136%, illustrates that this heat-resistant titanium alloy has good room-temperature property and mates with high-temperature behavior.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every above embodiment is done according to the technology of the present invention essence any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solution of the present invention.
Claims (5)
1. a heat-resistant titanium alloy, it is characterized in that, be grouped into by the one-tenth of following weight percentage: Al 10.0% ~ 12.0%, Nb 5.0% ~ 6.0%, Zr 3.0% ~ 4.0%, Mo 1.5% ~ 2.5%, Sn1.5% ~ 2.5%, Ta 0.5% ~ 1%, Si 0.2% ~ 0.4%, C 0.04% ~ 0.08%, surplus is Ti and inevitable impurity, wherein, the weight percentage of Al is 2 times of the weight percentage of Nb, and the weight percentage of Al is the weight percentage of Nb, the weight percentage of Zr and the weight percentage sum of Mo, described heat-resistant titanium alloy tensile strength is at ambient temperature not less than 1100MPa, unit elongation is not less than 5.0%, described heat-resistant titanium alloy is that tensile strength under 650 DEG C of conditions is not less than 640MPa in temperature, unit elongation is not less than 15%, described heat-resistant titanium alloy is 150MPa at stress, temperature is that the remaining deformation after keeping 100h under the condition of 650 DEG C is not more than 0.2%.
2. according to a kind of heat-resistant titanium alloy according to claim 1, it is characterized in that, be grouped into by the one-tenth of following weight percentage: Al 10.5% ~ 11.5%, Nb 5.2% ~ 5.8%, Zr 3.2% ~ 3.7%, Mo1.8% ~ 2.2%, Sn 1.7% ~ 2.2%, Ta 0.6% ~ 0.9%, Si 0.3%, C 0.05% ~ 0.07%, surplus is Ti and inevitable impurity.
3. according to a kind of heat-resistant titanium alloy according to claim 1, it is characterized in that, be grouped into by the one-tenth of following weight percentage: Al 10%, Nb 5%, Zr 3%, Mo 2%, Sn 1.5%, Ta 0.5%, Si0.2%, C 0.04%, surplus is Ti and inevitable impurity.
4. according to a kind of heat-resistant titanium alloy according to claim 1, it is characterized in that, be grouped into by the one-tenth of following weight percentage: Al 12%, Nb 6%, Zr 4%, Mo 2%, Sn 2.5%, Ta 1.0%, Si0.4%, C 0.08%, surplus is Ti and inevitable impurity.
5. according to a kind of heat-resistant titanium alloy according to claim 2, it is characterized in that, be grouped into by the one-tenth of following weight percentage: Al 11%, Nb 5.5%, Zr 3.5%, Mo 2%, Sn 2.0%, Ta0.75%, Si 0.3%, C 0.06%, surplus is Ti and inevitable impurity.
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| CN105970026A (en) * | 2016-05-31 | 2016-09-28 | 黄河科技学院 | Light weight alloy material and preparation method thereof |
| CN106048305A (en) * | 2016-07-18 | 2016-10-26 | 北京工业大学 | High-temperature titanium alloy rod with excellent comprehensive performance and preparation process thereof |
| CN106566949A (en) * | 2016-11-08 | 2017-04-19 | 中航装甲科技有限公司 | Preparation method and mixing device of graphene/titanium alloy composite armor material |
| CN108467971A (en) * | 2018-06-08 | 2018-08-31 | 南京赛达机械制造有限公司 | A kind of erosion resistant titanium alloy blade of aviation engine |
| CN108893653A (en) * | 2018-08-01 | 2018-11-27 | 徐海东 | A kind of wear-resistant titanium alloy material and preparation method thereof |
| CN114807654A (en) * | 2022-03-23 | 2022-07-29 | 成都飞机工业（集团）有限责任公司 | Composition design method of alloy |
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| CN114807654A (en) * | 2022-03-23 | 2022-07-29 | 成都飞机工业（集团）有限责任公司 | Composition design method of alloy |
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