CN103692109B - Low-temperature high-strength welding stick special for Ti-Al-Nb alloy - Google Patents

Low-temperature high-strength welding stick special for Ti-Al-Nb alloy Download PDF

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CN103692109B
CN103692109B CN201310681313.3A CN201310681313A CN103692109B CN 103692109 B CN103692109 B CN 103692109B CN 201310681313 A CN201310681313 A CN 201310681313A CN 103692109 B CN103692109 B CN 103692109B
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welding
titanium aluminium
niobium alloy
welding wire
temperature
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CN103692109A (en
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杜宇
刘伟
洪权
杨海瑛
毛小南
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Northwest Institute for Non Ferrous Metal Research
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Northwest Institute for Non Ferrous Metal Research
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B23K35/0261—Rods, electrodes, wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
    • B23K35/325—Ti as the principal constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/40—Making wire or rods for soldering or welding

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)

Abstract

The invention provides a low-temperature high-strength welding stick special for Ti-Al-Nb alloy. The welding stick is formed by the following component by weight percent: 1.5-1.8% of Al, 10-11.5% of Nb, less than or equal to 0.10% of Fe, less than or equal to 0.05% of Si, less than or equal to 0.08% of C, less than or equal to 0.04% of N, less than or equal to 0.006% of H, less than or equal to 0.12% of O and the balance of Ti. Deposited metal formed by welding the low-temperature high-strength welding stick with the Ti-Al-Nb alloy has excellent plasticity match, has the tensile strength of 1100-1300Mpa, the yield strength not smaller than 950 MPa and the extension ratio not lower than 22% under the condition that the temperature is 77K, and has great promotion value and wide application space, and a welding structure has good comprehensive performances.

Description

A kind of low-temperature high-strength titanium aluminium niobium alloy special welding wire
Technical field
The invention belongs to technical field of welding materials, be specifically related to a kind of low-temperature high-strength titanium aluminium niobium alloy special welding wire.
Background technology
Along with developing rapidly of the industries such as China's space flight, aviation, chemical industry, medicine, have the first-selection that high strength, excellent impact toughness and anti-notch sensitivity, thermal conductivity are low, become low temperature structure material without the titanium alloy of the features such as magnetic at low temperatures, a kind of important cryogenic engineering material that can be used as in the field such as aerospace, superconduction uses.Engineering material unavoidably needs to adopt welding manner to complete the connection of mother metal in structure application, and welded combination property is the key factor determining component security reliability simultaneously.And welded performance is by the impact of factors such as welding composition, welding manner and welding procedure etc., therefore, need to adopt the welding wire of special component to guarantee weldquality and reliably welded to the metal material of special component.
Titanium aluminium niobium alloy for 77K low temperature environment is grouped into by the one-tenth of following mass percent: Al2.0% ~ 3.5%, Nb12% ~ 16%, and surplus is Ti and inevitable impurity.This alloy, mainly for the manufacture of the pressure elements of liquid nitrogen in the every profession and trades such as space flight, superconduction, weapons, pressure resistant vessel, biological devices and corresponding flow guide system and pipeline etc., is the critical material of national defence and civilian production transport.The novel diphasic titanium alloy of Ti-5Al-2.5Sn, Ti-6Al-4V titanium alloy that titanium aluminium niobium alloy uses as a kind of alternative Conventional cryogenic, because with the addition of a large amount of Nb element, cause its room temperature excellent cold-workability exhibiting, but because it uses background to relate to the high-tech areas such as space flight and aviation, relevant report data is less, for the special welding wire that this alloy relates to, domesticly at present there is not yet relevant report.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, provides a kind of low-temperature high-strength titanium aluminium niobium alloy special welding wire.The tensile strength of deposited metal under 77K cryogenic conditions formed after this welding wire welds with titanium aluminium niobium alloy is 1100MPa ~ 1300MPa, yield strength is not less than 950MPa, percentage elongation is not less than 22%, the Welding Structure that this welding wire obtains after being used for the welding of titanium aluminium niobium alloy has good combination property, has promotional value and application space widely.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of low-temperature high-strength titanium aluminium niobium alloy special welding wire, is characterized in that, be grouped into: Al1.5% ~ 1.8% by the one-tenth of following mass percent, Nb10% ~ 11.5%, Fe≤0.10%, Si≤0.05%, C≤0.08%, N≤0.04%, H≤0.006%, O≤0.12%, surplus is Ti; Described low-temperature high-strength titanium aluminium niobium alloy special welding wire refers to that the tensile strength of deposited metal under temperature is 77K condition formed after this welding wire welds with titanium aluminium niobium alloy is 1100MPa ~ 1300MPa, yield strength is not less than 950MPa, percentage elongation is not less than 22%, described titanium aluminium niobium alloy is grouped into by the one-tenth of following mass percent: Al2.0% ~ 3.5%, Nb12% ~ 16%, surplus is Ti and inevitable impurity.
Above-mentioned a kind of low-temperature high-strength titanium aluminium niobium alloy special welding wire, it is characterized in that, be grouped into by the one-tenth of following mass percent: Al1.5%, Nb10%, Fe≤0.10%, Si≤0.05%, C≤0.08%, N≤0.04%, H≤0.006%, O≤0.12%, surplus is Ti.
Above-mentioned a kind of low-temperature high-strength titanium aluminium niobium alloy special welding wire, it is characterized in that, be grouped into by the one-tenth of following mass percent: Al1.8%, Nb11.8%, Fe≤0.10%, Si≤0.05%, C≤0.08%, N≤0.04%, H≤0.006%, O≤0.12%, surplus is Ti.
Above-mentioned a kind of low-temperature high-strength titanium aluminium niobium alloy special welding wire, it is characterized in that, be grouped into by the one-tenth of following mass percent: Al1.6%, Nb11%, Fe≤0.10%, Si≤0.05%, C≤0.08%, N≤0.04%, H≤0.006%, O≤0.12%, surplus is Ti.
Above-mentioned a kind of low-temperature high-strength titanium aluminium niobium alloy special welding wire, it is characterized in that, be grouped into by the one-tenth of following mass percent: Al1.6%, Nb10.5%, Fe≤0.10%, Si≤0.05%, C≤0.08%, N≤0.04%, H≤0.006%, O≤0.12%, surplus is Ti.
The preparation method of titanium aluminium niobium alloy special welding wire of the present invention is:
Step one, by titanium sponge, Al powder and Ti-Nb master alloy particle Homogeneous phase mixing by mass percentage, then on hydraulic press, be pressed into block type electrode;
Step 2, several piece electrode is adopted Plasma Welding growth strip, then in vacuum consumable electrode arc furnace, carry out two to three meltings, obtain ingot casting;
The rising head of step 3, excision ingot casting also rejects the blemish of ingot casting, is then carry out cogging forging to ingot casting under the condition of 1040 DEG C ~ 1210 DEG C in temperature;
Step 4, be that ingot casting after cogging being forged under the condition of 890 DEG C ~ 1010 DEG C carries out flat-die forging on open die forging equipment in temperature, obtain thick rod;
The thin rod of step 5, Φ 8mm ~ Φ 12mm that in temperature is that under the condition of 890 DEG C ~ 960 DEG C to be specification by the thick excellent hot rolling after forging be;
Step 6, employing polishing or car light mode remove the defects such as thick excellent surface scale and micro-crack, are then carry out hot pull to thin rod under the condition of 740 DEG C ~ 760 DEG C in temperature, obtain a material;
Step 7, silk material carried out surperficial mechanical treatment or soda acid washes process, then carry out annealing in process, finally obtain the finished product welding wire that specification is Φ 0.5 ~ Φ 6mm.
Described titanium aluminium niobium alloy can adopt conventional method to prepare: select suitable raw material first as required, by design mix mixing electrode pressing, alloy cast ingot is obtained through secondary or three meltings again in conventional vacuum consumable electroarc furnace, then alloy cast ingot to be stripped off the skin and after cutting rising head and tail end, the flat-die forging such as hydrostatic forging machine, forging hammer equipment carries out many fire time cogging forgings and upsetting pull forging, finally obtains titanium aluminium niobium alloy plate.The heating-up temperature of described cogging forging is 1150 DEG C ~ 1250 DEG C, and the fire time deflection of cogging forging is not less than 60%, and the heating-up temperature of upsetting pull forging is 850 DEG C ~ 980 DEG C, and the fire time deflection of upsetting pull forging is not more than 70%.
The present invention compared with prior art has the following advantages:
1, the Welding Structure that welding wire of the present invention obtains after welding with titanium aluminium niobium alloy has good combination property, and welding performance is good, and room temperature cold forming excellent performance, welding coefficient is greater than 90%.
2, the deposited metal formed after adopting welding wire of the present invention to weld with titanium aluminium niobium alloy has excellent strong plasticity and mates, its 293K room-temperature mechanical property and 77K cryogenic mechanics performance meet following requirement: the tensile strength Rm under 293K room temperature condition>=600MPa, yield strength Rp 0.2>=500MPa, percentage elongation A 50>=14%, impact flexibility α k u>=45J/cm 2; Tensile strength Rm=1100MPa under 77K cryogenic conditions ~ 1300MPa, yield strength Rp 0.2>=950MPa, percentage elongation A 50>=22%.The Welding Structure that proved invention welding wire obtains after being used for the welding of titanium aluminium niobium alloy thus has good combination property.
Below in conjunction with embodiment, the present invention is described in further detail.
Detailed description of the invention
Embodiment 1
The present embodiment titanium aluminium niobium alloy special welding wire, its chemical composition composition is by mass percentage: Al=1.5%, Nb=10%, Fe≤0.10%, Si≤0.05%, C≤0.08%, N≤0.04%, H≤0.006%, O≤0.12%, surplus is Ti.In the present embodiment, Fe=0.03%, Si≤0.04%, C=0.01%, N=0.01%, H=0.005%, O=0.08%.
The preparation method of the present embodiment titanium aluminium niobium special welding wire is:
Step one, by 1 grade of titanium sponge, high-purity Al powder (quality purity is more than 99%) and Ti-40Nb master alloy particle Homogeneous phase mixing by mass percentage, then on hydraulic press, be pressed into block type electrode;
Step 2, several piece electrode is adopted Plasma Welding growth strip, then in vacuum consumable electrode arc furnace, carry out two to three meltings, obtain ingot casting;
The rising head of step 3, excision ingot casting also rejects the blemish of ingot casting, is then carry out cogging forging to ingot casting under the condition of 1040 DEG C in temperature;
Step 4, be that ingot casting after cogging being forged under the condition of 890 DEG C carries out flat-die forging on open die forging equipment in temperature, obtain thick rod;
The thin rod of step 5, the Φ 8mm that in temperature is that under the condition of 890 DEG C to be specification by the thick excellent hot rolling after forging be;
Step 6, employing polishing or car light mode remove the defects such as thick excellent surface scale and micro-crack, are then carry out hot pull to thin rod under the condition of 740 DEG C in temperature, obtain a material;
Step 7, silk material carried out surperficial mechanical treatment or soda acid washes process, then carry out annealing in process, finally obtain the finished product welding wire that specification is Φ 0.5.
Select thickness be the titanium aluminium niobium alloy plate of δ 1.5mm as welding base metal, its name chemistry become be by mass percentage: Al3%, Nb15%, surplus is Ti and inevitable impurity.This titanium aluminium niobium alloy plate adopts conventional method to prepare: select suitable raw material first as required, by design mix mixing electrode pressing, alloy cast ingot is obtained through secondary or three meltings again in conventional vacuum consumable electroarc furnace, then alloy cast ingot to be stripped off the skin and after cutting rising head and tail end, the flat-die forging such as hydrostatic forging machine, forging hammer equipment carries out many fire time cogging forgings and upsetting pull forging, finally obtains titanium aluminium niobium alloy plate.The heating-up temperature of described cogging forging is 1200 DEG C, and the fire time deflection of cogging forging is not less than 60%, and the heating-up temperature of upsetting pull forging is 900 DEG C, and the fire time deflection of upsetting pull forging is not more than 70%.
With plate shearing machine, titanium aluminium niobium alloy plate is cut to the welding rod that specification is 30mm × 20mm × 1.5mm.Weld front acetone fully to soak welding wire and welding rod, adopt argon arc welding to complete mother metal welding after removing surface and oil contaminant, the room-temperature property of the rear deposited metal of welding and cryogenic property data are in table 1.
The mechanical property of table 1 embodiment of the present invention 1 deposited metal under room temperature and cryogenic conditions
As shown in Table 1, the 293K room-temperature mechanical property of the deposited metal formed after adopting this welding wire to weld with titanium aluminium niobium alloy and 77K cryogenic mechanics performance meet following requirement: the tensile strength Rm under 293K room temperature condition>=600MPa, yield strength Rp 0.2>=500MPa, percentage elongation A 50>=14%, impact flexibility α k u>=45J/cm 2; Tensile strength Rm=1100MPa under 77K cryogenic conditions ~ 1300MPa, yield strength Rp 0.2>=950MPa, percentage elongation A 50>=22%.It can thus be appreciated that the Welding Structure that the present embodiment welding wire obtains after being used for the welding of titanium aluminium niobium alloy has good combination property.
Embodiment 2
The present embodiment titanium aluminium niobium alloy special welding wire, its chemical composition composition is by mass percentage: Al=1.8%, Nb=11.5%, Fe≤0.10%, Si≤0.05%, C≤0.08%, N≤0.04%, H≤0.006%, O≤0.12%, surplus is Ti.In the present embodiment, Fe=0.02%, Si≤0.04%, C=0.01%, N=0.01%, H=0.002%, O=0.09%.
The preparation method of the present embodiment titanium aluminium niobium special welding wire is:
Step one, by 0 grade of titanium sponge, high-purity Al powder (quality purity is more than 99%) and Ti-45Nb master alloy particle Homogeneous phase mixing by mass percentage, then on hydraulic press, be pressed into block type electrode;
Step 2, several piece electrode is adopted Plasma Welding growth strip, then in vacuum consumable electrode arc furnace, carry out two to three meltings, obtain ingot casting;
The rising head of step 3, excision ingot casting also rejects the blemish of ingot casting, is then carry out cogging forging to ingot casting under the condition of 1210 DEG C in temperature;
Step 4, be that ingot casting after cogging being forged under the condition of 1010 DEG C carries out flat-die forging on open die forging equipment in temperature, obtain thick rod;
The thin rod of step 5, the Φ 12mm that in temperature is that under the condition of 960 DEG C to be specification by the thick excellent hot rolling after forging be;
Step 6, employing polishing or car light mode remove the defects such as thick excellent surface scale and micro-crack, are then carry out hot pull to thin rod under the condition of 760 DEG C in temperature, obtain a material;
Step 7, silk material carried out surperficial mechanical treatment or soda acid washes process, then carry out annealing in process, finally obtain the finished product welding wire that specification is Φ 3mm.
Select thickness be the titanium aluminium niobium alloy plate of δ 3mm as welding base metal, its name chemistry become be by mass percentage: Al3.5%, Nb12%, surplus is Ti and inevitable impurity.This titanium aluminium niobium alloy plate adopts conventional method to prepare: select suitable raw material first as required, by design mix mixing electrode pressing, alloy cast ingot is obtained through secondary or three meltings again in conventional vacuum consumable electroarc furnace, then alloy cast ingot to be stripped off the skin and after cutting rising head and tail end, the flat-die forging such as hydrostatic forging machine, forging hammer equipment carries out many fire time cogging forgings and upsetting pull forging, finally obtains the titanium aluminium niobium alloy plate that thickness is 3mm.The heating-up temperature of described cogging forging is 1150 DEG C, and the fire time deflection of cogging forging is not less than 60%, and the heating-up temperature of upsetting pull forging is 980 DEG C, and the fire time deflection of upsetting pull forging is not more than 70%.
With plate shearing machine, titanium aluminium niobium alloy plate is cut to the welding rod that specification is 30mm × 20mm × 3mm.Weld front acetone fully to soak welding wire and welding rod, adopt argon arc welding to complete mother metal welding after removing surface and oil contaminant, the room-temperature property of the rear deposited metal of welding and cryogenic property data are in table 2.
The mechanical property of table 2 embodiment of the present invention 2 deposited metal under room temperature and cryogenic conditions
As shown in Table 2, the 293K room-temperature mechanical property of the deposited metal formed after adopting this welding wire to weld with titanium aluminium niobium alloy and 77K cryogenic mechanics performance meet following requirement: the tensile strength Rm under 293K room temperature condition>=600MPa, yield strength Rp 0.2>=500MPa, percentage elongation A 50>=14%, impact flexibility α k u>=45J/cm 2; Tensile strength Rm=1100MPa under 77K cryogenic conditions ~ 1300MPa, yield strength Rp 0.2>=950MPa, percentage elongation A 50>=22%.It can thus be appreciated that the Welding Structure that the present embodiment welding wire obtains after being used for the welding of titanium aluminium niobium alloy has good combination property.
Embodiment 3
The present embodiment titanium aluminium niobium alloy special welding wire, its chemical composition composition is by mass percentage: Al=1.6%, Nb=11%, Fe≤0.10%, Si≤0.05%, C≤0.08%, N≤0.04%, H≤0.006%, O≤0.12%, surplus is Ti.In the present embodiment, Fe=0.01%, Si≤0.04%, C=0.01%, N=0.01%, H=0.006%, O=0.07%.
The preparation method of the present embodiment titanium aluminium niobium special welding wire is:
Step one, by 0 grade of titanium sponge, high-purity Al powder (quality purity is more than 99%) and Ti-50Nb master alloy particle Homogeneous phase mixing by mass percentage, then on hydraulic press, be pressed into block type electrode;
Step 2, several piece electrode is adopted Plasma Welding growth strip, then in vacuum consumable electrode arc furnace, carry out two to three meltings, obtain ingot casting;
The rising head of step 3, excision ingot casting also rejects the blemish of ingot casting, is then carry out cogging forging to ingot casting under the condition of 1180 DEG C in temperature;
Step 4, be that ingot casting after cogging being forged under the condition of 900 DEG C carries out flat-die forging on open die forging equipment in temperature, obtain thick rod;
The thin rod of step 5, the Φ 10mm that in temperature is that under the condition of 920 DEG C to be specification by the thick excellent hot rolling after forging be;
Step 6, employing polishing or car light mode remove the defects such as thick excellent surface scale and micro-crack, are then carry out hot pull to thin rod under the condition of 750 DEG C in temperature, obtain a material;
Step 7, silk material carried out surperficial mechanical treatment or soda acid washes process, then carry out annealing in process, finally obtain the finished product welding wire that specification is Φ 6mm.
Select thickness be the titanium aluminium niobium alloy plate of δ 20mm as welding base metal, its name chemistry become be by mass percentage: Al2%, Nb16%, surplus is Ti and inevitable impurity.This titanium aluminium niobium alloy plate adopts conventional method to prepare: select suitable raw material first as required, by design mix mixing electrode pressing, alloy cast ingot is obtained through secondary or three meltings again in conventional vacuum consumable electroarc furnace, then alloy cast ingot to be stripped off the skin and after cutting rising head and tail end, the flat-die forging such as hydrostatic forging machine, forging hammer equipment carries out many fire time cogging forgings and upsetting pull forging, finally obtains the titanium aluminium niobium alloy plate that thickness is 20mm.The heating-up temperature of described cogging forging is 1250 DEG C, and the fire time deflection of cogging forging is not less than 60%, and the heating-up temperature of upsetting pull forging is 850 DEG C, and the fire time deflection of upsetting pull forging is not more than 70%.
With plate shearing machine, titanium aluminium niobium alloy plate is cut to the welding rod that specification is 150mm × 60mm × 20mm.Weld front acetone fully to soak welding wire and welding rod, adopt argon arc welding to complete mother metal welding after removing surface and oil contaminant, the room-temperature property of the rear deposited metal of welding and cryogenic property data are in table 3.
The mechanical property of table 3 embodiment of the present invention 3 deposited metal under room temperature and cryogenic conditions
As shown in Table 3, the 293K room-temperature mechanical property of the deposited metal formed after adopting this welding wire to weld with titanium aluminium niobium alloy and 77K cryogenic mechanics performance meet following requirement: the tensile strength Rm under 293K room temperature condition>=600MPa, yield strength Rp 0.2>=500MPa, percentage elongation A 50>=14%, impact flexibility α k u>=45J/cm 2; Tensile strength Rm=1100MPa under 77K cryogenic conditions ~ 1300MPa, yield strength Rp 0.2>=950MPa, percentage elongation A 50>=22%.It can thus be appreciated that the Welding Structure that the present embodiment welding wire obtains after being used for the welding of titanium aluminium niobium alloy has good combination property.
Embodiment 4
The present embodiment titanium aluminium niobium alloy special welding wire, its chemical composition composition is by mass percentage: Al=1.6%, Nb=10.5%, Fe≤0.10%, Si≤0.05%, C≤0.08%, N≤0.04%, H≤0.006%, O≤0.12%, surplus is Ti.In the present embodiment, Fe=0.1%, Si=0.05%, C=0.08%, N=0.04%, H=0.006%, O=0.12%.
The preparation method of the present embodiment titanium aluminium niobium special welding wire is:
Step one, by 1 grade of titanium sponge, high-purity Al powder (quality purity is more than 99%) and Ti-55Nb master alloy particle Homogeneous phase mixing by mass percentage, then on hydraulic press, be pressed into block type electrode;
Step 2, several piece electrode is adopted Plasma Welding growth strip, then in vacuum consumable electrode arc furnace, carry out two to three meltings, obtain ingot casting;
The rising head of step 3, excision ingot casting also rejects the blemish of ingot casting, is then carry out cogging forging to ingot casting under the condition of 1180 DEG C in temperature;
Step 4, be that ingot casting after cogging being forged under the condition of 900 DEG C carries out flat-die forging on open die forging equipment in temperature, obtain thick rod;
The thin rod of step 5, the Φ 10mm that in temperature is that under the condition of 920 DEG C to be specification by the thick excellent hot rolling after forging be;
Step 6, employing polishing or car light mode remove the defects such as thick excellent surface scale and micro-crack, are then carry out hot pull to thin rod under the condition of 750 DEG C in temperature, obtain a material;
Step 7, silk material carried out surperficial mechanical treatment or soda acid washes process, then carry out annealing in process, finally obtain the finished product welding wire that specification is Φ 6mm.
Select thickness be the titanium aluminium niobium alloy plate of δ 20mm as welding base metal, its name chemistry become be by mass percentage: Al2.5%, Nb15%, surplus is Ti and inevitable impurity.This titanium aluminium niobium alloy plate adopts conventional method to prepare: select suitable raw material first as required, by design mix mixing electrode pressing, alloy cast ingot is obtained through secondary or three meltings again in conventional vacuum consumable electroarc furnace, then alloy cast ingot to be stripped off the skin and after cutting rising head and tail end, the flat-die forging such as hydrostatic forging machine, forging hammer equipment carries out many fire time cogging forgings and upsetting pull forging, finally obtains the titanium aluminium niobium alloy plate that thickness is 20mm.The heating-up temperature of described cogging forging is 1250 DEG C, and the fire time deflection of cogging forging is not less than 60%, and the heating-up temperature of upsetting pull forging is 850 DEG C, and the fire time deflection of upsetting pull forging is not more than 70%.
With plate shearing machine, titanium aluminium niobium alloy plate is cut to the welding rod that specification is 150mm × 60mm × 20mm.Weld front acetone fully to soak welding wire and welding rod, adopt argon arc welding to complete mother metal welding after removing surface and oil contaminant, the room-temperature property of the rear deposited metal of welding and cryogenic property data are in table 3.
The mechanical property of table 4 embodiment of the present invention 4 deposited metal under room temperature and cryogenic conditions
As shown in Table 4, the 293K room-temperature mechanical property of the deposited metal formed after adopting this welding wire to weld with titanium aluminium niobium alloy and 77K cryogenic mechanics performance meet following requirement: the tensile strength Rm under 293K room temperature condition>=600MPa, yield strength Rp 0.2>=500MPa, percentage elongation A 50>=14%, impact flexibility α k u>=45J/cm 2; Tensile strength Rm=1100MPa under 77K cryogenic conditions ~ 1300MPa, yield strength Rp 0.2>=950MPa, percentage elongation A 50>=22%.It can thus be appreciated that the Welding Structure that the present embodiment welding wire obtains after being used for the welding of titanium aluminium niobium alloy has good combination property.
The above is only preferred embodiment of the present invention, not imposes any restrictions the present invention.Every above embodiment is done according to invention technical spirit any simple modification, change and equivalence change, all still belong in the protection domain of technical solution of the present invention.

Claims (5)

1. a low-temperature high-strength titanium aluminium niobium alloy special welding wire, is characterized in that, is grouped into: Al1.5% ~ 1.8%, Nb10% ~ 11.5% by the one-tenth of following mass percent, Fe≤0.10%, Si≤0.05%, C≤0.08%, N≤0.04%, H≤0.006%, O≤0.12%, surplus is Ti; Described low-temperature high-strength titanium aluminium niobium alloy special welding wire refers to that the tensile strength of deposited metal under temperature is 77K condition formed after this welding wire welds with titanium aluminium niobium alloy is 1100MPa ~ 1300MPa, yield strength is not less than 950MPa, percentage elongation is not less than 22%, described titanium aluminium niobium alloy is grouped into by the one-tenth of following mass percent: Al2.0% ~ 3.5%, Nb12% ~ 16%, surplus is Ti and inevitable impurity.
2. a kind of low-temperature high-strength titanium aluminium niobium alloy special welding wire according to claim 1, is characterized in that, be grouped into: Al1.5%, Nb10% by the one-tenth of following mass percent, Fe≤0.10%, Si≤0.05%, C≤0.08%, N≤0.04%, H≤0.006%, O≤0.12%, surplus is Ti.
3. a kind of low-temperature high-strength titanium aluminium niobium alloy special welding wire according to claim 1, is characterized in that, be grouped into: Al1.8%, Nb11.5% by the one-tenth of following mass percent, Fe≤0.10%, Si≤0.05%, C≤0.08%, N≤0.04%, H≤0.006%, O≤0.12%, surplus is Ti.
4. a kind of low-temperature high-strength titanium aluminium niobium alloy special welding wire according to claim 1, is characterized in that, be grouped into: Al1.6%, Nb11% by the one-tenth of following mass percent, Fe≤0.10%, Si≤0.05%, C≤0.08%, N≤0.04%, H≤0.006%, O≤0.12%, surplus is Ti.
5. a kind of low-temperature high-strength titanium aluminium niobium alloy special welding wire according to claim 1, is characterized in that, be grouped into: Al1.6%, Nb10.5% by the one-tenth of following mass percent, Fe≤0.10%, Si≤0.05%, C≤0.08%, N≤0.04%, H≤0.006%, O≤0.12%, surplus is Ti.
CN201310681313.3A 2013-12-12 2013-12-12 Low-temperature high-strength welding stick special for Ti-Al-Nb alloy Active CN103692109B (en)

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US4957236A (en) * 1988-06-17 1990-09-18 Gte Products Corporation Method of brazing parts of Ti-Al-Nb alloy
US5190602A (en) * 1991-12-17 1993-03-02 The United States Of America As Represented By The Secretary Of Commerce Heterophase titanium aluminides having orthorhombic and omega-type microstructures
CN1814395A (en) * 2006-03-16 2006-08-09 中国航空工业第一集团公司北京航空材料研究院 High-strength dual-phase titanium alloy welding wire
CN101653884A (en) * 2009-07-15 2010-02-24 哈尔滨工业大学 High-temperature brazing filler metal
CN102229018A (en) * 2011-04-28 2011-11-02 中国航空工业集团公司北京航空材料研究院 Argon arc welding method suitable for self connection of TiAl-based alloy material

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Publication number Priority date Publication date Assignee Title
US4957236A (en) * 1988-06-17 1990-09-18 Gte Products Corporation Method of brazing parts of Ti-Al-Nb alloy
US5190602A (en) * 1991-12-17 1993-03-02 The United States Of America As Represented By The Secretary Of Commerce Heterophase titanium aluminides having orthorhombic and omega-type microstructures
CN1814395A (en) * 2006-03-16 2006-08-09 中国航空工业第一集团公司北京航空材料研究院 High-strength dual-phase titanium alloy welding wire
CN101653884A (en) * 2009-07-15 2010-02-24 哈尔滨工业大学 High-temperature brazing filler metal
CN102229018A (en) * 2011-04-28 2011-11-02 中国航空工业集团公司北京航空材料研究院 Argon arc welding method suitable for self connection of TiAl-based alloy material

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