CN112872654A - TC4 titanium alloy solid welding wire for large-thickness ultra-narrow gap laser filler wire welding and preparation method thereof - Google Patents
TC4 titanium alloy solid welding wire for large-thickness ultra-narrow gap laser filler wire welding and preparation method thereof Download PDFInfo
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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
- B23K35/22—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
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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
- B23K35/40—Making wire or rods for soldering or welding
Abstract
A TC4 titanium alloy solid welding wire for large-thickness ultra-narrow gap laser filler wire welding and a preparation method thereof. The invention belongs to the technical field of welding materials. The invention provides a TC4 titanium alloy solid welding wire for large-thickness ultra-narrow gap laser filler wire welding and a preparation method thereof. The solid welding wire comprises the following chemical components in percentage by mass: 5.0% -7.0%, V: 4.0% -6.0%, Mo: 1.5% -2.5%, Cr: 0.2-0.5%, Zr: 0.5 to 1.5 percent of Ti, and the balance of Ti. The method comprises the following steps: weighing raw materials according to chemical components of a welding wire, mixing the raw materials, pressing the mixed raw materials into an electrode block, welding the electrode block into a consumable electrode, firstly carrying out primary smelting to obtain a primary ingot, then carrying out secondary smelting to obtain a titanium alloy ingot, turning a skin, cutting off a dead head, forging the titanium alloy ingot into a square billet, rolling, drawing, straightening and polishing the square billet to obtain a wire material, carrying out vacuum annealing, drawing and reducing the diameter, carrying out stress relief annealing and cleaning in a vacuum tube type annealing furnace, winding the wire material on a wire reel, and carrying out vacuum plastic packaging to obtain the TC4 titanium alloy solid welding wire for large-thickness ultra-narrow gap laser wire filling welding.
Description
Technical Field
The invention belongs to the technical field of welding materials, and particularly relates to a TC4 titanium alloy solid welding wire for large-thickness ultra-narrow gap laser filler wire welding and a preparation method thereof.
Background
The TC4 titanium alloy has many excellent characteristics of high specific strength, no magnetism, no toxicity, high strength, corrosion resistance, wide working temperature range, good processing and forming and the like, and is widely applied to the fields of marine drilling, pressure vessels, deep submergence vehicles, nuclear submarines, aerospace ships, weaponry and the like. As early as the 80's of the last century, ocean defense construction army in the united states has started to manufacture ocean transport vessels from titanium alloy materials, so that the service life and stability of the ocean transport vessels are greatly improved, and the maintenance cost is also reduced. In recent years, the proportion of titanium alloy materials used in the deep sea space workstation manufacturing industry has been increasing in many western developed countries. Compared with integral stamping, the welding preparation has the advantages of small processing amount, short period, less material consumption and low cost, and the welding material is one of important influence factors influencing the performance of the welding joint. At present, TIG welding, laser welding, electron beam welding and other self-fluxing welding are mostly adopted in titanium alloy welding, and no filler metal is involved.
The solid welding wire can obtain a welding joint with better comprehensive performance, but most of the solid welding wires are only applied to the fields of argon arc welding, brazing and the like. The laser filler wire welding has the advantages of narrow welding heat affected zone, concentrated welding energy and the like of the laser welding, meanwhile, the metallurgical effect of the filler metal can supplement metallurgical burning loss of beneficial elements, the important effect is realized on refining structure crystal grains and improving comprehensive performance, and based on the characteristics and the advantages of the laser filler wire welding, the existing welding wire can not completely meet the use requirement of the welding wire, so that the solid welding wire for the laser filler wire welding, which has the advantages of high welding efficiency, good flowing spreadability of a molten pool, less splashing in the welding process, no oxide and welding smoke adhesion on the surface of a welding seam, suitability for large-thickness ultra-narrow gap laser filler wire welding, and great importance for improving the application range of large-thickness titanium alloy, is developed.
Disclosure of Invention
The invention provides a TC4 titanium alloy solid welding wire for large-thickness ultra-narrow gap laser filler wire welding and a preparation method thereof to solve the technical problems.
The TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding comprises the following chemical components in percentage by mass: 5.0% -7.0%, V: 4.0% -6.0%, Mo: 1.5% -2.5%, Cr: 0.2-0.5%, Zr: 0.5 to 1.5 percent of Ti, and the balance of Ti.
Further limiting, the solid welding wire comprises the following chemical components in percentage by mass: 5.0% -6.0%, V: 5.0% -6.0%, Mo: 1.5% -2.0%, Cr: 0.2-0.4%, Zr: 0.5 to 1.0 percent of Ti, and the balance of Ti.
Further limiting, the solid welding wire comprises the following chemical components in percentage by mass: 5.5% -6.0%, V: 5.5% -6.0%, Mo: 1.5% -2.0%, Cr: 0.2-0.3%, Zr: 0.5 to 0.8 percent of Ti, and the balance of Ti.
Further limiting, the chemical components and mass percentage of the impurities in the solid welding wire are that Fe is less than or equal to 0.02%, C is less than or equal to 0.02%, O is less than or equal to 0.05%, N is less than or equal to 0.01%, and H is less than or equal to 0.001%.
Further limiting, the chemical components and mass percentage of the impurities in the solid welding wire are that Fe is less than or equal to 0.02 percent, C is less than or equal to 0.015 percent, O is less than or equal to 0.05 percent, N is less than or equal to 0.01 percent, and H is less than or equal to 0.001 percent.
Further limiting, the chemical components and mass percentage of the impurities in the solid welding wire are that Fe is less than or equal to 0.01 percent, C is less than or equal to 0.01 percent, O is less than or equal to 0.04 percent, N is less than or equal to 0.01 percent, and H is less than or equal to 0.001 percent.
The preparation method of the TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding is carried out according to the following steps:
step 1: weighing titanium sponge, aluminum-molybdenum alloy powder, zirconium sponge, chromium powder and vanadium powder as raw materials according to chemical components of the welding wire, mixing the raw materials, and putting the mixed raw materials into a die to press the mixed raw materials into an electrode block;
step 2: welding the electrode block prepared in the step 1 into a consumable electrode;
and step 3: firstly, carrying out primary smelting on the consumable electrode prepared in the step 2 in a vacuum furnace to obtain a primary ingot, and then carrying out secondary smelting to obtain a titanium alloy ingot;
and 4, step 4: turning the titanium alloy ingot casting in the step 3, cutting off a riser, and forging into a square billet;
and 5: rolling, drawing, straightening and polishing the square billet obtained in the step 4 to obtain a wire material;
step 6: carrying out vacuum annealing on the wire material obtained in the step 5 to obtain a titanium alloy welding wire with the diameter of 4.0 mm;
and 7: continuously drawing and reducing the titanium alloy welding wire with the diameter of 4.0mm in the step 6 on a wire drawing machine, sequentially passing through wire drawing dies with the diameters of 3.8mm, 3.4mm, 3.0mm, 2.75mm, 2.65mm, 2.55mm, 2.45mm, 2.4mm, 2.24mm, 2.05mm, 1.85mm and 1.6mm, and performing stress annealing in a vacuum tube annealing furnace at 600-630 ℃ for 40-60 min after three times of drawing and reducing to obtain the titanium alloy welding wire with the diameter of 1.6 mm;
and 8: cleaning the titanium alloy welding wire with the diameter of 1.6mm obtained in the step 7 for 1-2 min by adopting a mixed solution of NaOH and acetone, then cleaning the titanium alloy welding wire with clear water, and then cleaning the titanium alloy welding wire with HF and HNO3The mixed aqueous solution is ultrasonically cleaned for 6min to 10min, the moisture on the surface of the welding wire is removed, then the welding wire is wound on a welding wire disc by a welding wire layer winding machine, and a vacuum packaging machine is used for vacuumizing and plastic packaging to obtain the TC4 titanium alloy solid welding wire for large-thickness ultra-narrow gap laser filler wire welding.
Further limiting, pressing into the electrode block by using a gas press in the step 1.
Further limiting, welding the consumable electrode in the step 2 by using a laser self-welding method.
Further limiting, in the step 3, a vacuum consumable melting method is adopted for primary melting and secondary melting.
Further, the temperature for forging in the step 4 is 1100-1200 ℃.
Further, the size of the square billet obtained in the step 4 is 8.5mm multiplied by 8.5 mm.
Further limiting, the parameters of the vacuum annealing process in step 6 are as follows: the temperature is 640-720 ℃, the heat preservation time is 1-2 h, the vacuum degree in the heat preservation process is less than 0.01Pa, and the mixture is cooled to room temperature along with the furnace and taken out of the furnace.
Further, in the step 8, the mixed solution of NaOH and acetone contains 15% by mass of NaOH and 85% by mass of acetone.
Further defined, the HF and HNO in step 83The mixed aqueous solution of (2) contains 5% by mass of HF and HNO3Is 35 percent.
Further limiting, the specific process of removing the moisture on the surface of the welding wire in the step 8 is as follows: the welding wire is wiped mechanically.
Compared with the prior art, the invention has the advantages that:
in the production process of the titanium alloy solid welding wire, the smelting process is simple, and the technical difficulty of the drawing process is low; the developed titanium alloy solid welding wire has the process advantages of high deposition efficiency, less welding spatter, wide applicable window area of the welding process, less oxide adhesion and welding smoke on the surface of a welding seam, good wetting and spreading fluidity, attractive welding seam forming and the like in the welding process; simultaneously still have the welding joint and warp little, the lateral wall fuses good, welding joint mechanical properties advantage such as good, be applicable to the laser filler wire welding of big thickness super narrow gap TC4 titanium alloy, specific advantage is as follows:
1) the TC3 welding wire is usually adopted as filler metal in the TC4 titanium alloy welding process with the conventional thickness and the welding method, the TC3 welding wire contains two impurities of 0.04% of Fe and 0.05% of C, oxides and welding dust generated in the welding process in the range of the conventional groove gap can be attached to the surface of a welding seam and the side wall of a groove, and the oxides and the welding dust attached to the surface of the welding seam and the side wall of the groove are easy to clean due to the large groove gap, so that the subsequent welding cannot be influenced. The oxide and welding smoke dust generated in the large-thickness ultra-narrow gap laser wire filling welding process are attached to the surface of a welding seam and the side wall of the groove, the cleaning is very difficult due to the fact that the welding groove is very deep and narrow, and the welding wire can enter a molten pool in the subsequent welding process to generate serious welding defects of air holes, cracks and unfused welding, so that the proportion and the impurity content of each metal powder are strictly controlled, the oxide and the welding smoke dust generated in the welding process are very few, and the welding quality cannot be influenced.
2) The content of the beta-phase stable element V is increased, the Mo element which is not contained in the TC3 welding wire is increased, the beta-phase stability is increased, the plastic deformation of the beta-phase can be changed into various modes such as sliding and twin crystal from single sliding, and the work hardening capacity and the plasticity of a welding joint can be obviously improved. In addition, a small amount of Mo can also improve the high-temperature creep property and the thermal stability of the titanium alloy.
3) The Cr in the invention can reduce the beta phase transition temperature in the TC4 titanium alloy welding joint, thereby prolonging the high-temperature beta phase solid solution time, ensuring the solid solution process to be more sufficient and effectively avoiding the component segregation phenomenon in the titanium alloy welding seam structure.
4) Zr in the titanium alloy belongs to neutral elements, has higher solid solubility in both alpha phase and beta phase, can refine net basket alpha phase and columnar beta phase in a weld joint structure, thereby increasing phase interface area, and often accumulates a large amount of distortion energy at phase boundary, which is beneficial to generating energy, composition and structural fluctuation, provides conditions for new phase nucleation, and can further refine weld joint grain structure. In addition, the stiffness of the titanium alloy welding wire can be increased by a certain content of Zr, in the process of large-thickness ultra-narrow gap laser wire filling welding, whether the direction of the welding wire is accurate or not is determined by the stiffness of the welding wire output by the wire feeding device, and if the direction of the welding wire deviates from the center position of the welding seam, the flowing direction of a molten pool formed by melting the welding wire under the action of a laser beam is irregular, so that the problems of poor welding seam forming, poor side wall fusion and the like are easily caused.
5) The O impurity in the titanium alloy welding joint belongs to a gap type alpha phase stable element, and the tensile strength and the elastic modulus of the titanium alloy welding joint can be improved by controlling the content of the impurity element O.
6) The H impurity in the titanium alloy welding joint belongs to a gap type beta phase stable element, the content of the impurity element H in the raw material is controlled, and in addition, dehydrogenation can also be carried out to a certain extent through 40-60 min and 600-630 ℃ annealing treatment carried out in the drawing and reducing process of the welding wire, so that the hydrogen embrittlement phenomenon is avoided.
7) The N impurity in the titanium alloy welding joint also belongs to a gap type alpha phase stable element, and the tensile strength and the plasticity of the titanium alloy welding joint can be improved by controlling the content of the impurity element N.
8) The TC4 titanium alloy solid welding wire provided by the invention can refine weld structure grains and improve the strength and the plastic toughness of a welding joint by adjusting the components of each alloy to obtain the optimal proportion; the welding blowhole tendency is reduced; higher deposition efficiency is obtained; the welding wire has enough stiffness, can keep straight and send into the central area of the laser beam in the wire feeding process, obtains better welding seam formation, and does not have oxide and welding smoke on the surface of the welding seam.
Detailed Description
Example 1: the TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding comprises the following chemical components in percentage by mass: 5.5%, V: 4.5%, Mo: 1.5%, Cr: 0.3%, Zr: 1.0 percent and the balance of Ti, wherein the chemical components and the mass percentage of the impurities are Fe: 0.02%, C: 0.02%, O: 0.05%, N: 0.01%, H: 0.001 percent.
The method for preparing the TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding in the embodiment 1 comprises the following steps:
step 1: weighing titanium sponge, aluminum-molybdenum alloy powder, zirconium sponge, chromium powder and vanadium powder as raw materials according to chemical components of a welding wire, mixing the raw materials, putting the mixed materials into a die, and pressing the mixed materials into an electrode block by adopting a gas press;
step 2: welding the electrode block prepared in the step 1 into a consumable electrode by adopting a laser self-fusion welding method;
and step 3: firstly, carrying out primary smelting on the consumable electrode prepared in the step 2 in a vacuum furnace by adopting a vacuum consumable smelting method to obtain a primary ingot, and then carrying out secondary smelting by adopting a vacuum consumable smelting method to obtain a titanium alloy ingot;
and 4, step 4: turning the titanium alloy ingot casting in the step 3, cutting off a riser, and forging the titanium alloy ingot casting into a square billet with the specification of 8.5mm multiplied by 8.5mm at the temperature of 1100 ℃;
and 5: rolling, drawing, straightening and polishing the square billet obtained in the step 4 to obtain a wire material;
step 6: carrying out vacuum annealing on the wire material in the step 5, wherein the temperature of the vacuum annealing is 650 ℃, the heat preservation time is 1.5h, the vacuum degree in the heat preservation process is less than 0.01Pa, cooling the wire material along with the furnace to room temperature, and discharging the wire material to obtain a titanium alloy welding wire with the diameter of 4.0 mm;
and 7: continuously drawing and reducing the titanium alloy welding wire with the diameter of 4.0mm in the step 6 on a wire drawing machine, sequentially passing through wire drawing dies with the diameters of 3.8mm, 3.4mm, 3.0mm, 2.75mm, 2.65mm, 2.55mm, 2.45mm, 2.4mm, 2.24mm, 2.05mm, 1.85mm and 1.6mm, and performing stress annealing for 40min at 600 ℃ in a vacuum tube type annealing furnace after the drawing and reducing are finished for three times to obtain the titanium alloy welding wire with the diameter of 1.6 mm;
and 8: cleaning the titanium alloy welding wire with the diameter of 1.6mm obtained in the step 7 for 1min by adopting a mixed solution of 15 wt.% NaOH and 85 wt.% acetone, then cleaning the titanium alloy welding wire with clean water, and then cleaning the titanium alloy welding wire with the diameter of 5 wt.% HF and 35 wt.% HNO3The welding wire is cleaned by ultrasonic in the mixed aqueous solution for 6min by a mechanical method, the moisture on the surface of the welding wire is removed, then the welding wire is wound on a welding wire disc by a welding wire layer winding machine, and vacuum-pumping plastic package is carried out by a vacuum packaging machine, so that the large-thickness ultra-narrow gap TC4 titanium alloy solid welding wire for laser filler wire welding with the diameter of 1.6mm is obtained.
The solid welding wire obtained in the embodiment 1 is subjected to large-thickness ultra-narrow gap TC4 titanium alloy plate laser wire filling welding, the welding process is completed by accumulating a single-pass multilayer welding mode, the protective gas is 100% Ar, the gas flow is 20L/min, the specification of the TC4 titanium alloy plate is 400 multiplied by 200 multiplied by 40mm, a U-shaped groove is machined, the truncated edge is 4mm, the gap at the root of the groove is 3.2mm, the angle of the single-edge groove is 1 degree, 11 passes of welding are totally completed to test plate welding, the interlayer temperature is controlled within 80 ℃, specific welding process parameters are shown in a table 1, and the mechanical property results of a welding joint are shown in a table 2.
TABLE 1 welding Process parameters
TABLE 2 weld joint mechanical property test results
Example 2: the TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding comprises the following chemical components in percentage by mass: 5.8%, V: 5.5%, Mo: 1.85%, Cr: 0.3%, Zr: 0.8 percent, and the balance of Ti, wherein the chemical components and the mass percentage of the impurities are Fe: 0.01%, C: 0.01%, O: 0.03%, N: 0.01%, H: 0.001 percent.
The method for preparing the TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding in the embodiment 2 comprises the following steps:
step 1: weighing titanium sponge, aluminum-molybdenum alloy powder, zirconium sponge, chromium powder and vanadium powder as raw materials according to chemical components of a welding wire, mixing the raw materials, putting the mixed materials into a die, and pressing the mixed materials into an electrode block by adopting a gas press;
step 2: welding the electrode block prepared in the step 1 into a consumable electrode by adopting a laser self-fusion welding method;
and step 3: firstly, carrying out primary smelting on the consumable electrode prepared in the step 2 in a vacuum furnace by adopting a vacuum consumable smelting method to obtain a primary ingot, and then carrying out secondary smelting by adopting a vacuum consumable smelting method to obtain a titanium alloy ingot;
and 4, step 4: turning the titanium alloy ingot casting in the step 3, cutting off a riser, and forging the titanium alloy ingot casting into a square billet with the specification of 8.5mm multiplied by 8.5mm at 1200 ℃;
and 5: rolling, drawing, straightening and polishing the square billet obtained in the step 4 to obtain a wire material;
step 6: carrying out vacuum annealing on the wire material in the step 5, wherein the temperature of the vacuum annealing is 700 ℃, the heat preservation time is 1.5h, the vacuum degree in the heat preservation process is less than 0.01Pa, cooling the wire material along with the furnace to room temperature, and discharging the wire material to obtain a titanium alloy welding wire with the diameter of 4.0 mm;
and 7: continuously drawing and reducing the titanium alloy welding wire with the diameter of 4.0mm in the step 6 on a wire drawing machine, sequentially passing through wire drawing dies with the diameters of 3.8mm, 3.4mm, 3.0mm, 2.75mm, 2.65mm, 2.55mm, 2.45mm, 2.4mm, 2.24mm, 2.05mm, 1.85mm and 1.6mm, and performing stress annealing in a vacuum tube annealing furnace at 630 ℃ for 60min after three times of drawing and reducing to obtain the titanium alloy welding wire with the diameter of 1.6 mm;
and 8: cleaning the titanium alloy welding wire with the diameter of 1.6mm obtained in the step 7 for 1min by adopting a mixed solution of 15 wt.% NaOH and 85 wt.% acetone, then cleaning the titanium alloy welding wire with clean water, and then cleaning the titanium alloy welding wire with the diameter of 5 wt.% HF and 35 wt.% HNO3Ultrasonic treatment of the mixed aqueous solution ofCleaning for 6min, wiping the welding wire by adopting a mechanical method, removing moisture on the surface of the welding wire, winding the welding wire on a welding wire disc by adopting a welding wire layer winding machine, and performing vacuum-pumping plastic package by using a vacuum packaging machine to obtain the TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding with the diameter of 1.6 mm.
The solid welding wire obtained in the embodiment 2 is subjected to large-thickness ultra-narrow gap TC4 titanium alloy plate laser wire filling welding, the welding process is completed by accumulating a single-pass multilayer welding mode, the protective gas is 100% Ar, the gas flow is 20L/min, the specification of the TC4 titanium alloy plate is 400 multiplied by 200 multiplied by 40mm, a U-shaped groove is machined, the truncated edge is 4mm, the gap at the root of the groove is 3.2mm, the angle of the single-edge groove is 1 degree, the test plate welding is completed by totally 11 passes of welding, the interlayer temperature is controlled within 80 ℃, specific welding process parameters are shown in a table 3, and the mechanical property results of a welding joint are shown in a table 4.
TABLE 3 welding Process parameters
TABLE 4 weld joint mechanical property test results
Claims (10)
1. The TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding is characterized by comprising the following chemical components in percentage by mass: 5.0% -7.0%, V: 4.0% -6.0%, Mo: 1.5% -2.5%, Cr: 0.2-0.5%, Zr: 0.5 to 1.5 percent of Ti, and the balance of Ti.
2. The TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding as claimed in claim 1, wherein the chemical components and mass percentage of impurities in the solid welding wire are Fe less than or equal to 0.02%, C less than or equal to 0.02%, O less than or equal to 0.05%, N less than or equal to 0.01%, and H less than or equal to 0.001%.
3. The TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding as claimed in claim 2, wherein the solid welding wire comprises the following chemical components in percentage by mass: 5.0% -6.0%, V: 5.0% -6.0%, Mo: 1.5% -2.0%, Cr: 0.2-0.4%, Zr: 0.5 to 1.0 percent of Ti, and the balance of Ti, wherein the chemical components and the mass percentage of impurities in the solid welding wire are that Fe is less than or equal to 0.02 percent, C is less than or equal to 0.015 percent, O is less than or equal to 0.05 percent, N is less than or equal to 0.01 percent, and H is less than or equal to 0.001 percent.
4. The TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding as claimed in claim 2, wherein the solid welding wire comprises the following chemical components in percentage by mass: 5.5% -6.0%, V: 5.5% -6.0%, Mo: 1.5% -2.0%, Cr: 0.2-0.3%, Zr: 0.5 to 0.8 percent of Ti, and the balance of Ti, wherein the chemical components and the mass percentage of impurities in the solid welding wire are that Fe is less than or equal to 0.01 percent, C is less than or equal to 0.01 percent, O is less than or equal to 0.04 percent, N is less than or equal to 0.01 percent, and H is less than or equal to 0.001 percent.
5. The preparation method of the TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding as claimed in any one of claims 1-4, which is characterized by comprising the following steps:
step 1: weighing titanium sponge, aluminum-molybdenum alloy powder, zirconium sponge, chromium powder and vanadium powder as raw materials according to chemical components of the welding wire, mixing the raw materials, and putting the mixed raw materials into a die to press the mixed raw materials into an electrode block;
step 2: welding the electrode block prepared in the step 1 into a consumable electrode;
and step 3: firstly, carrying out primary smelting on the consumable electrode prepared in the step 2 in a vacuum furnace to obtain a primary ingot, and then carrying out secondary smelting to obtain a titanium alloy ingot;
and 4, step 4: turning the titanium alloy ingot casting in the step 3, cutting off a riser, and forging into a square billet;
and 5: rolling, drawing, straightening and polishing the square billet obtained in the step 4 to obtain a wire material;
step 6: carrying out vacuum annealing on the wire material obtained in the step 5 to obtain a titanium alloy welding wire with the diameter of 4.0 mm;
and 7: continuously drawing and reducing the titanium alloy welding wire with the diameter of 4.0mm in the step 6 on a wire drawing machine, sequentially passing through wire drawing dies with the diameters of 3.8mm, 3.4mm, 3.0mm, 2.75mm, 2.65mm, 2.55mm, 2.45mm, 2.4mm, 2.24mm, 2.05mm, 1.85mm and 1.6mm, and performing stress annealing in a vacuum tube annealing furnace at 600-630 ℃ for 40-60 min after three times of drawing and reducing to obtain the titanium alloy welding wire with the diameter of 1.6 mm;
and 8: cleaning the titanium alloy welding wire with the diameter of 1.6mm obtained in the step 7 for 1-2 min by adopting a mixed solution of NaOH and acetone, then cleaning the titanium alloy welding wire with clear water, and then cleaning the titanium alloy welding wire with HF and HNO3The mixed aqueous solution is ultrasonically cleaned for 6min to 10min, the moisture on the surface of the welding wire is removed, then the welding wire is wound on a welding wire disc by a welding wire layer winding machine, and a vacuum packaging machine is used for vacuumizing and plastic packaging to obtain the TC4 titanium alloy solid welding wire for large-thickness ultra-narrow gap laser filler wire welding.
6. The method for preparing the TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding according to claim 5, wherein a gas press is adopted to press the welding wire into the electrode block in step 1, and a laser self-fusion welding method is adopted to weld the welding wire into the consumable electrode in step 2.
7. The preparation method of the TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding as claimed in claim 5, wherein in step 3, a vacuum consumable melting method is adopted for primary melting and secondary melting.
8. The preparation method of the TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding according to claim 5, wherein the forging temperature in the step 4 is 1100-1200 ℃, and the square billet specification obtained in the step 4 is 8.5mm x 8.5 mm.
9. The preparation method of the TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow gap laser filler wire welding according to claim 5, wherein the parameters of the vacuum annealing process in the step 6 are as follows: the temperature is 640-720 ℃, the heat preservation time is 1-2 h, the vacuum degree in the heat preservation process is less than 0.01Pa, and the mixture is cooled to room temperature along with the furnace and taken out of the furnace.
10. The method for preparing the TC4 titanium alloy solid welding wire for the large-thickness ultra-narrow-gap laser filler-wire welding according to claim 5, wherein the mixed solution of NaOH and acetone in the step 8 comprises 15% by mass of NaOH, 85% by mass of acetone, and the HF and HNO in the step 83The mixed aqueous solution of (2) contains 5% by mass of HF and HNO3The mass fraction of the welding wire is 35 percent, and the specific process of removing the water on the surface of the welding wire in the step 8 is as follows: the welding wire is wiped mechanically.
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Cited By (5)
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|---|---|---|---|---|
| CN114161028A (en) * | 2021-12-20 | 2022-03-11 | 西北有色金属研究院 | Processing method for improving performance of titanium alloy welding wire |
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| CN114161028A (en) * | 2021-12-20 | 2022-03-11 | 西北有色金属研究院 | Processing method for improving performance of titanium alloy welding wire |
| CN114309932A (en) * | 2021-12-24 | 2022-04-12 | 哈尔滨焊接研究院有限公司 | Efficient welding method suitable for ultra-narrow gap welding of thick-wall titanium alloy component |
| WO2023116071A1 (en) * | 2021-12-24 | 2023-06-29 | 哈尔滨焊接研究院有限公司 | Efficient welding method applicable to ultra-narrow gap welding of thick-walled titanium alloy member |
| CN114309932B (en) * | 2021-12-24 | 2023-11-10 | 中国机械总院集团哈尔滨焊接研究所有限公司 | Efficient welding method suitable for ultra-narrow gap welding of thick-wall titanium alloy component |
| GB2619223A (en) * | 2021-12-24 | 2023-11-29 | Harbin Welding Inst Co Ltd | Efficient welding method applicable to ultra-narrow gap welding of thick-walled titanium alloy member |
| CN115338564A (en) * | 2022-10-17 | 2022-11-15 | 西安稀有金属材料研究院有限公司 | Preparation method of Zr702L welding wire with low stress corrosion sensitivity |
| CN115821186A (en) * | 2022-12-19 | 2023-03-21 | 哈尔滨焊接研究院有限公司 | Heat treatment method for improving plasticity and toughness of titanium alloy welded joint |
| CN115821186B (en) * | 2022-12-19 | 2023-08-08 | 中国机械总院集团哈尔滨焊接研究所有限公司 | Heat treatment method for improving toughness of titanium alloy welded joint |
| CN117444468A (en) * | 2023-12-25 | 2024-01-26 | 内蒙金属材料研究所 | High-strength crack-inhibiting titanium alloy welding wire and preparation method thereof |
| CN117444468B (en) * | 2023-12-25 | 2024-04-05 | 内蒙金属材料研究所 | High-strength crack-inhibiting titanium alloy welding wire and preparation method thereof |
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