CN112404798B - TC4 titanium alloy flux-cored wire and preparation method thereof - Google Patents
TC4 titanium alloy flux-cored wire and preparation method thereof Download PDFInfo
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- CN112404798B CN112404798B CN202011335293.0A CN202011335293A CN112404798B CN 112404798 B CN112404798 B CN 112404798B CN 202011335293 A CN202011335293 A CN 202011335293A CN 112404798 B CN112404798 B CN 112404798B
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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
- B23K35/02—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
- B23K35/0266—Rods, electrodes, wires flux-cored
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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
- B23K35/406—Filled tubular wire or rods
Abstract
A TC4 titanium alloy flux-cored wire and a preparation method thereof. The invention belongs to the technical field of welding material preparation. The invention aims to solve the technical problems that most of the existing welding wires for titanium alloy welding are solid welding wires, the preparation process of the solid welding wires is complex in smelting process, the formula adjustment cost is high, the deposition efficiency of the obtained welding wires in the welding process is low, and the wettability and spreadability of the obtained welding wires are poor. The flux-cored wire is prepared from a TA1 titanium alloy sheath and a flux core; the TA1 titanium alloy outer skin is formed by coiling, drawing and annealing a TA1 titanium belt; the medicine core is formed by mixing vanadium powder, aluminum powder, molybdenum powder, cobalt powder, nickel powder, copper powder, silicon powder and titanium powder. The preparation method comprises the following steps: cleaning a TA1 titanium belt, carrying out ball milling on the powder of the powder core, then coiling the TA1 titanium belt, filling the powder of the powder core, rolling and reducing, annealing, and then carrying out cold drawing and reducing wire drawing die to obtain the flux-cored wire. The flux-cored wire can be used for welding TC4 titanium alloy, and has the advantages of good comprehensive mechanical property, low content of diffusible hydrogen in deposited metal and high welding efficiency.
Description
Technical Field
The invention belongs to the technical field of welding material preparation, and particularly relates to a TC4 titanium alloy flux-cored wire 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 and electron beam welding are mostly adopted during titanium alloy welding, most of adopted welding materials are solid welding wires, related patents of the invention of the titanium alloy welding wires also mostly belong to the field of the solid welding wires, and for example, patent CN101456102A discloses a refined grain type welding wire for titanium alloy manual tungsten electrode argon arc welding and a preparation method; patent CN1814395A discloses a solid welding wire for high-strength dual-phase titanium alloy; patent CN104084712A discloses a solid welding wire for titanium alloy welding with strong corrosion resistance; the patent CN 104923968A discloses a Ti-6Al-3V welding wire special for Ti-6Al-4V ELI titanium alloy and a processing technology. Although the solid welding wire can obtain a welding joint with better comprehensive performance, in the actual production process, the solid welding wire has higher formula adjustment cost due to the complex smelting process and certain requirement on the single smelting weight, and meanwhile, the titanium alloy solid welding wire has the defects of lower deposition efficiency, larger welding spatter, poorer wetting and spreading performance and the like in the welding process.
Disclosure of Invention
The invention aims to provide a high-quality and high-efficiency TC4 titanium alloy flux-cored wire and a preparation method thereof, and aims to solve the technical problems that most of the existing welding wires for titanium alloy welding are solid welding wires, the preparation process of the solid welding wires is complex in smelting process, the formula adjustment cost is high, the obtained welding wires are low in deposition efficiency and poor in wetting and spreading performance in the welding process, and the like.
The TC4 titanium alloy flux-cored wire is prepared from a TA1 titanium alloy sheath and a flux core; the TA1 titanium alloy sheath is formed by coiling, drawing and annealing a TA1 titanium belt; the flux core is formed by mixing vanadium powder, aluminum powder, molybdenum powder, cobalt powder, nickel powder, copper powder, silicon powder and titanium powder, wherein the mass percentage of each component is vanadium powder: 15% -25% of aluminum powder: 25% -30%, molybdenum powder: 15% -20%, cobalt powder: 0.1% -0.3%, nickel powder: 2% -4%, copper powder: 0.5-1%, silicon powder: 0.1 to 0.3 percent of titanium powder and the balance of titanium powder.
Further limited, the TA1 titanium alloy sheath has the following elements: more than or equal to 99 percent of Ti, less than or equal to 0.015 percent of H and less than or equal to 0.03 percent of N.
Further limited, the TA1 titanium strip has a thickness of 0.3mm to 0.5mm and a width of 5mm to 7 mm.
Further limiting, the filling rate of the flux core in the TC4 titanium alloy flux-cored wire is 18-22%.
Further limiting, the granularity of the aluminum powder and the titanium powder in the flux core is 80-120 meshes, and the granularity of the rest metal powder in the flux core is 80-200 meshes.
Further limiting, the deposited metal elements of the TC4 titanium alloy flux-cored wire comprise the following components in percentage by weight: al: 4.5% -7.5%, Si: 0.05-0.1%, Cu: 0.05-0.1%, Mo: 2.7% -5.0%, V: 2.7% -4.5%, Co: 0.02% -0.05%, Ni: 0.01 to 0.03 percent of Ti and the balance of Ti.
Further limiting, the content of diffusible hydrogen in the deposited metal of the TC4 titanium alloy flux-cored wire is 1.5mL/100 g-2.2 mL/100 g.
The preparation method of the TC4 titanium alloy flux-cored wire is carried out according to the following steps:
firstly, cleaning a TA1 titanium strip: firstly, cleaning the titanium belt with a mixed solution of NaOH and acetone, washing with clear water after cleaning, and then washing with HF and HNO3Ultrasonically cleaning the mixed aqueous solution to obtain a cleaned TA1 titanium belt;
secondly, preparing medicine core powder: ball-milling and mixing vanadium powder, aluminum powder, molybdenum powder, cobalt powder, nickel powder, copper powder, silicon powder and titanium powder in proportion under the argon atmosphere to obtain medicine core powder;
thirdly, preparing a TA1 titanium alloy flux-cored wire precursor: coiling the TA1 titanium strip into a titanium tube with a circular section, filling the powder core obtained in the step two in the coiling process, rolling the titanium tube filled with the powder core, reducing the diameter of the titanium tube by multiple passes, and performing stress relief annealing after reducing the diameter of the titanium tube by every two passes to obtain the titanium tube with the diameter of 4mm, namely the TA1 titanium alloy flux-cored wire precursor with the outer diameter of 4 mm;
fourthly, cold-drawing and reducing the diameter of the wire drawing die: and (4) carrying out multi-pass cold-drawing reducing wire-drawing die on the TA1 titanium alloy flux-cored wire precursor with the outer diameter of 4mm obtained in the step (three), and carrying out stress relief annealing after each cold-drawing reducing wire-drawing die is carried out for three times to obtain the flux-cored wire with the diameter of 1.2 mm.
Further limiting, the mass fraction of NaOH in the mixed solution of NaOH and acetone in the step one is 10-20%.
Further limiting, in the first step, the mass fraction of NaOH in the mixed solution of NaOH and acetone is 15%.
Further limiting, the mass fraction of the acetone in the mixed solution of NaOH and acetone in the step one is 80-90%.
Further limiting, in the first step, the mass fraction of acetone in the mixed solution of NaOH and acetone is 85%.
And further limiting, in the step one, firstly, cleaning the titanium belt for 1-2 min by using a mixed solution of NaOH and acetone.
Further defined, the HF and HNO in step one3The mass fraction of HF in the mixed aqueous solution is 4-6%, and HNO3The mass fraction of (A) is 30-40%.
Further defined, the HF and HNO in step one3The mixed aqueous solution of (2) contains 5% by mass of HF and HNO3Is 35 percent.
Further limiting, HF and HNO are reused in the step one3The mixed aqueous solution is cleaned by ultrasonic for 5min to 7 min.
Further limiting, the frequency of ultrasonic cleaning in the step one is 20 kHz-30 kHz, and the power density is 2W/cm2～3W/cm2。
Further limiting, the specific parameters of the ball milling in the step two are as follows: the ball-material ratio is 3:1, the ball milling time is 2.5 h-3.0 h, and the ball milling speed is 150 r/min.
Further limiting, in the step three, the diameter is reduced by 0.48 mm-0.51 mm in each pass during the multi-pass diameter reduction.
Further limiting, the time of the stress relief annealing in the third step is 25-50 min, and the temperature is 620-650 ℃.
Further limiting, the process of the multi-pass cold-drawing reducing wire-drawing die in the fourth step specifically comprises: the drawing dies with the diameters of 3.8mm, 3.4mm, 3.0mm, 2.75mm, 2.65mm, 2.55mm, 2.45mm, 2.4mm, 2.35mm, 2.24mm, 2.10mm, 2.0mm, 1.6mm, 1.5mm, 1.4mm and 1.2mm are directly arranged in sequence.
Further limiting, in the fourth step, the time of the stress relief annealing is 40-60 min, and the temperature is 600-630 ℃.
Compared with the prior art, the invention has the advantages that:
the welding wire has reasonably adjusted alloy elements and content, so that the welding seam presents better comprehensive performance, and the content of the diffused hydrogen of the deposited metal by a thermal conductivity method is controlled between 1.5mL/100g and 2.2mL/100 g.
The TC4 titanium alloy flux-cored wire provided by the invention obtains the optimal proportion by adjusting the flux-cored components, can improve the strength and the plasticity and toughness of a welding joint, reduces welding pores and incomplete fusion, and obtains higher deposition efficiency and better weld forming. Vanadium powder with the mass fraction of 15-25% is added into the metal powder, so that beta phase in a weld joint structure can be strongly stabilized, weld joint crystal grains are refined, and the weld joint strength is increased; aluminum powder with the mass fraction of 25-30% is added, so that the alpha phase can be stabilized, the phase transition temperature can be increased, the normal-temperature and high-temperature strength of a welding line can be improved, the elastic modulus can be increased and the like; the added molybdenum powder with the mass fraction of 15-20% can improve the hardenability of the welding line and greatly improve the strength and toughness of the welding line; the cobalt powder with the mass fraction of 0.1-0.3% is added, so that the thermal expansion coefficient of a welding seam can be reduced, and the residual stress of the joint is reduced; the nickel powder with the mass fraction of 2-4% is added, so that the corrosion resistance of the welding line can be obviously improved; copper powder with the mass fraction of 0.5-1.0% is added, so that the plasticity of the welding joint is improved; the addition of 0.1 to 0.3 percent of silicon powder can fully deoxidize the weld metal and reduce the tendency of pore formation.
The preparation process of the flux-cored wire for titanium alloy welding is simple, the smelting process is not needed, the component proportion can be flexibly adjusted, and the improvement of the welding process performance and the joint mechanical property through formula adjustment is facilitated; meanwhile, the method has the advantages of high deposition efficiency, low content of diffused hydrogen, large penetration, small welding spatter, good wetting and spreading performance, good welding seam forming and low manufacturing cost.
The TC4 titanium alloy flux-cored wire provided by the invention can be applied to the fields of laser filler wire welding, gas metal arc welding and the like, has good welding manufacturability, excellent comprehensive mechanical property, low content of diffused hydrogen, high welding efficiency, no need of cleaning slag shells after welding, is suitable for welding of TC4 titanium alloy, has the joint performance equivalent to that of a parent metal when welding the TC4 titanium alloy, basically keeps the component alloy system of a welding seam consistent with the parent metal, does not generate component transition and segregation, obviously increases the fusion depth, improves the fusion efficiency, has small splashing in the welding process, has good welding seam forming and better application prospect.
Drawings
FIG. 1 is a photograph of the morphology of a sample before and after an experiment, i.e., a tensile test.
Detailed Description
The first embodiment is as follows: the TC4 titanium alloy flux-cored wire is prepared from a TA1 titanium alloy sheath and a flux core; the TA1 titanium alloy sheath is formed by coiling, drawing and annealing a TA1 titanium belt; the flux core is formed by mixing vanadium powder, aluminum powder, molybdenum powder, cobalt powder, nickel powder, copper powder, silicon powder and titanium powder, wherein the mass percentage of each component is vanadium powder: 20% of aluminum powder: 26% and molybdenum powder: 18%, cobalt powder: 0.1%, nickel powder: 2% of copper powder: 0.6%, silicon powder: 0.1 percent and the balance of titanium powder, wherein the TA1 titanium alloy sheath comprises the following elements in percentage by weight: the titanium alloy flux-cored wire is characterized in that Ti is more than or equal to 99%, H is less than or equal to 0.015%, N is less than or equal to 0.03%, the thickness of the TA1 titanium strip is 0.35mm, the width is 7mm, and the length is 35m, wherein the filling rate of a flux core in the TC4 titanium alloy flux-cored wire is 20%, the granularity of aluminum powder and titanium powder in the flux core is 80-120 meshes, and the granularity of the rest metal powder in the flux core is 80-200 meshes.
The flux-cored wire of the embodiment comprises the following chemical components in percentage by mass: v: 3.97%, Al: 5.12%, Mo: 3.45%, Co: 0.03%, Ni: 0.01%, Cu: 0.07%, Si: 0.06 percent and the balance of Ti.
The content of diffusible hydrogen in the flux-cored wire deposited metal of the present embodiment is 1.7mL/100 g.
The welding seam formed by the flux-cored wire of the embodiment after welding is attractive in shape, and various properties of the welding seam metal are excellent.
The method for preparing the TC4 titanium alloy flux-cored wire comprises the following steps:
firstly, cleaning a TA1 titanium strip: firstly, cleaning the titanium belt for 2min by using a mixed solution of NaOH and acetone, washing the titanium belt by using clear water after the cleaning is finished, and then, cleaning the titanium belt by using HF and HNO3The mixed aqueous solution of (A) is at 22Hz and the power density is 2.3W/cm2Performing ultrasonic cleaning for 6min to obtain a cleaned TA1 titanium belt;the mixed solution of NaOH and acetone contains 15% of NaOH, 85% of acetone and HF and HNO3The mixed aqueous solution of (2) contains 5% by mass of HF and HNO3Is 35 percent;
secondly, preparing medicine core powder: ball-milling and mixing vanadium powder, aluminum powder, molybdenum powder, cobalt powder, nickel powder, copper powder, silicon powder and titanium powder in the proportion in the first specific embodiment under the argon atmosphere, wherein the ball-material ratio is 3:1, the ball-milling time is 3.0h, and the ball-milling rotating speed is 150r/min to obtain medicine core powder;
thirdly, preparing a TA1 titanium alloy flux-cored wire precursor: coiling the TA1 titanium strip into a titanium tube with a circular section, filling the powder core powder obtained in the step two in the coiling process, rolling the titanium tube filled with the powder core powder, reducing the diameter of the titanium tube to 4mm through multiple passes until the diameter of the titanium tube is reduced by 0.48mm, performing stress relief annealing after every two passes of diameter reduction, wherein the stress relief annealing time is 40min, the temperature is 610 ℃, and obtaining the titanium tube with the diameter of 4mm, namely the TA1 titanium alloy flux-cored precursor welding wire with the outer diameter of 4 mm;
fourthly, cold-drawing and reducing the diameter of the wire drawing die: and (3) carrying out multi-pass cold-drawing reducing wire drawing die on the TA1 titanium alloy flux-cored wire precursor with the outer diameter of 4mm obtained in the step (III), sequentially passing through wire drawing dies with the outer diameters of 3.8mm, 3.4mm, 3.0mm, 2.75mm, 2.65mm, 2.55mm, 2.45mm, 2.4mm, 2.35mm, 2.24mm, 2.10mm, 2.0mm, 1.6mm, 1.5mm, 1.4mm and 1.2mm, carrying out stress relief annealing after each cold-drawing reducing wire drawing die is carried out for three times, wherein the time of the stress relief annealing is 45min, and the temperature is 620 ℃, and obtaining the flux-cored wire with the diameter of 1.2 mm.
The second embodiment is as follows: the TC4 titanium alloy flux-cored wire is prepared from a TA1 titanium alloy sheath and a flux core; the TA1 titanium alloy sheath is formed by coiling, drawing and annealing a TA1 titanium belt; the flux core is formed by mixing vanadium powder, aluminum powder, molybdenum powder, cobalt powder, nickel powder, copper powder, silicon powder and titanium powder, wherein the mass percentage of each component is vanadium powder: 23% of aluminum powder: 25% and molybdenum powder: 15%, cobalt powder: 0.2%, nickel powder: 3% of copper powder: 0.8%, silicon powder: 0.2 percent and the balance of titanium powder, wherein the TA1 titanium alloy sheath comprises the following elements in percentage by weight: the titanium alloy flux-cored wire is characterized in that Ti is more than or equal to 99%, H is less than or equal to 0.015%, N is less than or equal to 0.03%, the thickness of the TA1 titanium strip is 0.40mm, the width is 8mm, and the length is 35m, wherein the filling rate of a flux core in the TC4 titanium alloy flux-cored wire is 22%, the granularity of aluminum powder and titanium powder in the flux core is 80-120 meshes, and the granularity of the rest metal powder in the flux core is 80-200 meshes.
The flux-cored wire of the embodiment comprises the following chemical components in percentage by mass: v: 4.96%, Al: 5.42%, Mo: 3.24%, Co: 0.04%, Ni: 0.02%, Cu: 0.08%, Si: 0.08 percent and the balance of Ti.
The content of diffusible hydrogen in the flux-cored wire deposited metal of the present embodiment is 1.6mL/100 g.
The welding seam formed by the flux-cored wire of the embodiment after welding is attractive in shape, and various properties of the welding seam metal are excellent.
The method for preparing the TC4 titanium alloy flux-cored wire comprises the following steps:
firstly, cleaning a TA1 titanium strip: firstly, cleaning the titanium belt for 2min by using a mixed solution of NaOH and acetone, washing the titanium belt by using clear water after the cleaning is finished, and then, washing the titanium belt by using HF and HNO3The mixed aqueous solution of (A) at 24Hz and a power density of 2.5W/cm2Performing ultrasonic cleaning for 6min to obtain a cleaned TA1 titanium belt; the mixed solution of NaOH and acetone contains 15% of NaOH, 85% of acetone and HF and HNO3The mixed aqueous solution of (2) contains 5% by mass of HF and HNO3Is 35 percent;
secondly, preparing medicine core powder: ball-milling and mixing vanadium powder, aluminum powder, molybdenum powder, cobalt powder, nickel powder, copper powder, silicon powder and titanium powder in the proportion in the first specific embodiment under the argon atmosphere, wherein the ball-material ratio is 3:1, the ball-milling time is 3.0h, and the ball-milling rotating speed is 150r/min to obtain medicine core powder;
thirdly, preparing a TA1 titanium alloy flux-cored wire precursor: coiling the TA1 titanium strip into a titanium tube with a circular section, filling the powder core powder obtained in the step two in the coiling process, rolling the titanium tube filled with the powder core powder, reducing the diameter of the titanium tube to 4mm through multiple passes until the diameter of the titanium tube is reduced by 0.49mm, performing stress relief annealing after every two passes of diameter reduction, wherein the stress relief annealing time is 50min, the temperature is 610 ℃, and obtaining the titanium tube with the diameter of 4mm, namely the TA1 titanium alloy flux-cored precursor welding wire with the outer diameter of 4 mm;
fourthly, cold-drawing and reducing the diameter of the wire drawing die: and (3) carrying out multi-pass cold-drawing reducing wire drawing on the TA1 titanium alloy flux-cored wire precursor with the outer diameter of 4mm obtained in the step (III), sequentially passing through wire drawing dies with the outer diameters of 3.8mm, 3.4mm, 3.0mm, 2.75mm, 2.65mm, 2.55mm, 2.45mm, 2.4mm, 2.35mm, 2.24mm, 2.10mm, 2.0mm, 1.6mm, 1.5mm, 1.4mm and 1.2mm, carrying out stress relief annealing after cold-drawing reducing wire drawing dies are used for three times, wherein the time of the stress relief annealing is 40min, and the temperature is 610 ℃, so as to obtain the flux-cored wire with the diameter of 1.2 mm.
The third concrete implementation mode: the TC4 titanium alloy flux-cored wire is prepared from a TA1 titanium alloy sheath and a flux core; the TA1 titanium alloy outer skin is formed by coiling, drawing and annealing a TA1 titanium belt; the flux core is formed by mixing vanadium powder, aluminum powder, molybdenum powder, cobalt powder, nickel powder, copper powder, silicon powder and titanium powder, wherein the mass percentage of each component is vanadium powder: 16% of aluminum powder: 25% and molybdenum powder: 15%, cobalt powder: 0.3%, nickel powder: 4% of copper powder: 1.0%, silicon powder: 0.3 percent of titanium powder, and the balance of titanium powder, wherein the TA1 titanium alloy sheath comprises the following elements in percentage by weight: the titanium alloy flux-cored wire is characterized in that Ti is more than or equal to 99%, H is less than or equal to 0.015%, N is less than or equal to 0.03%, the thickness of the TA1 titanium strip is 0.45mm, the width is 8mm, and the length is 35m, wherein the filling rate of a flux core in the TC4 titanium alloy flux-cored wire is 25%, the granularity of aluminum powder and titanium powder in the flux core is 80-120 meshes, and the granularity of the rest metal powder in the flux core is 80-200 meshes.
The flux-cored wire of the embodiment comprises the following chemical components in percentage by mass: v: 3.90%, Al: 6.17%, Mo: 3.65%, Co: 0.05%, Ni: 0.02%, Cu: 0.09%, Si: 0.09% and the balance Ti.
The content of diffusible hydrogen in the flux-cored wire deposited metal of the present embodiment is 1.7mL/100 g.
The welding seam formed by the flux-cored wire of the embodiment after welding is attractive in shape, and various properties of the welding seam metal are excellent.
The method for preparing the TC4 titanium alloy flux-cored wire comprises the following steps:
firstly, cleaning a TA1 titanium strip: firstly, cleaning the titanium belt for 2min by using a mixed solution of NaOH and acetone, washing the titanium belt by using clear water after the cleaning is finished, and then, washing the titanium belt by using HF and HNO3The mixed aqueous solution of (A) at 25Hz and a power density of 2.6W/cm2Performing ultrasonic cleaning for 6min to obtain a cleaned TA1 titanium belt; the mixed solution of NaOH and acetone contains 15% of NaOH, 85% of acetone and HF and HNO3The mixed aqueous solution of (2) contains 5% by mass of HF and HNO3Is 35 percent;
secondly, preparing medicine core powder: ball-milling and mixing vanadium powder, aluminum powder, molybdenum powder, cobalt powder, nickel powder, copper powder, silicon powder and titanium powder in the proportion in the first specific embodiment under the argon atmosphere, wherein the ball-material ratio is 3:1, the ball-milling time is 3.0h, and the ball-milling rotating speed is 150r/min to obtain medicine core powder;
thirdly, preparing a TA1 titanium alloy flux-cored wire precursor: coiling the TA1 titanium strip into a titanium tube with a circular section, filling the powder core powder obtained in the step two in the coiling process, rolling the titanium tube filled with the powder core powder, reducing the diameter of the titanium tube to 4mm through multiple passes, reducing the diameter of each pass by 0.50mm to obtain a titanium tube with the diameter of 4mm, and performing stress relief annealing after each two passes of diameter reduction, wherein the stress relief annealing time is 45min, the temperature is 620 ℃, so that a TA1 titanium alloy flux core precursor welding wire with the outer diameter of 4mm is obtained;
fourthly, cold-drawing and reducing the diameter of the wire drawing die: and (3) carrying out multi-pass cold-drawing reducing wire drawing die on the TA1 titanium alloy flux-cored wire precursor with the outer diameter of 4mm obtained in the step (III), sequentially passing through wire drawing dies with the outer diameters of 3.8mm, 3.4mm, 3.0mm, 2.75mm, 2.65mm, 2.55mm, 2.45mm, 2.4mm, 2.35mm, 2.24mm, 2.10mm, 2.0mm, 1.6mm, 1.5mm, 1.4mm and 1.2mm, carrying out stress relief annealing after each cold-drawing reducing wire drawing die is carried out for three times, wherein the time of the stress relief annealing is 45min, and the temperature is 620 ℃, and obtaining the flux-cored wire with the diameter of 1.2 mm.
The following tests were used to verify the beneficial effects of the present invention:
in the first test, the flux-cored wire obtained in the third specific embodiment is subjected to multilayer and multi-pass welding by using gas metal arc welding equipment, the protective gas is 100% Ar, the gas flow is 20L/min, the base metal is a TC4 titanium alloy plate, the specification is 400 × 200 × 10mm, a V-shaped groove is machined, the angle of a single-side groove is 30 degrees, the gap at the root of the groove is 3mm, 4 passes of welding are totally performed to complete the welding of the test plate, the interlayer temperature is controlled within 100 ℃, and specific welding process parameters are shown in Table 1.
TABLE 1 welding Process parameters
Reference is made to GB/T25774.1-2010 inspection of welding material part 1: the test results of tensile and impact properties of welded test plates are shown in Table 2.
TABLE 2 mechanical Property test results
Claims (1)
1. The TC4 titanium alloy flux-cored wire is characterized in that the flux-cored wire is prepared from a TA1 titanium alloy outer skin and a flux core; the TA1 titanium alloy sheath is formed by coiling, drawing and annealing a TA1 titanium belt; the flux core is formed by mixing vanadium powder, aluminum powder, molybdenum powder, cobalt powder, nickel powder, copper powder, silicon powder and titanium powder, wherein the mass percentage of each component is vanadium powder: 16% of aluminum powder: 25% and molybdenum powder: 15%, cobalt powder: 0.3%, nickel powder: 4% of copper powder: 1.0%, silicon powder: 0.3 percent of titanium powder, and the balance of titanium powder, wherein the TA1 titanium alloy sheath comprises the following elements in percentage by weight: the titanium alloy flux-cored wire is characterized in that Ti is more than or equal to 99%, H is less than or equal to 0.015%, N is less than or equal to 0.03%, the thickness of the TA1 titanium strip is 0.45mm, the width is 8mm, and the length is 35m, wherein the filling rate of a flux core in the TC4 titanium alloy flux-cored wire is 25%, the granularity of aluminum powder and titanium powder in the flux core is 80-120 meshes, and the granularity of the rest metal powder in the flux core is 80-200 meshes; the flux-cored wire comprises the following chemical components in percentage by mass: v: 3.90%, Al: 6.17%, Mo: 3.65%, Co: 0.05%, Ni: 0.02%, Cu: 0.09%, Si: 0.09% and the balance Ti; the content of diffusible hydrogen in the flux-cored wire deposited metal is 1.7mL/100 g;
the method for preparing the TC4 titanium alloy flux-cored wire comprises the following steps:
firstly, cleaning a TA1 titanium strip: firstly, cleaning the titanium belt for 2min by using a mixed solution of NaOH and acetone, washing the titanium belt by using clear water after the cleaning is finished, and then, washing the titanium belt by using HF and HNO3The mixed aqueous solution of (A) at 25Hz and a power density of 2.6W/cm2Performing ultrasonic cleaning for 6min to obtain a cleaned TA1 titanium belt; the mixed solution of NaOH and acetone contains 15% of NaOH, 85% of acetone and HF and HNO3The mixed aqueous solution of (2) contains 5% by mass of HF and HNO3Is 35 percent;
secondly, preparing medicine core powder: ball-milling and mixing vanadium powder, aluminum powder, molybdenum powder, cobalt powder, nickel powder, copper powder, silicon powder and titanium powder in an argon atmosphere according to the proportion of each raw material powder in the flux core, wherein the ball-material ratio is 3:1, the ball-milling time is 3.0h, and the ball-milling rotating speed is 150r/min to obtain the flux core powder;
thirdly, preparing a TA1 titanium alloy flux-cored wire precursor: coiling the TA1 titanium strip into a titanium tube with a circular section, filling the powder core powder obtained in the step two in the coiling process, rolling the titanium tube filled with the powder core powder, reducing the diameter of the titanium tube to 4mm through multiple passes, reducing the diameter of each pass by 0.50mm to obtain a titanium tube with the diameter of 4mm, and performing stress relief annealing after each two passes of diameter reduction, wherein the stress relief annealing time is 45min, the temperature is 620 ℃, so that a TA1 titanium alloy flux core precursor welding wire with the outer diameter of 4mm is obtained;
fourthly, cold-drawing and reducing the diameter of the wire drawing die: and (3) carrying out multi-pass cold-drawing reducing wire drawing die on the TA1 titanium alloy flux-cored wire precursor with the outer diameter of 4mm obtained in the step three, 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, 2.35mm, 2.24mm, 2.10mm, 2.0mm, 1.6mm, 1.5mm, 1.4mm and 1.2mm, carrying out stress relief annealing after cold-drawing reducing wire drawing dies are used for three times, wherein the time of the stress relief annealing is 45min, and the temperature is 620 ℃, so as to obtain the flux-cored wire with the diameter of 1.2 mm.
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| CN114473294B (en) * | 2021-12-28 | 2022-10-14 | 哈尔滨焊接研究院有限公司 | Ti-Al-V-Mo series metal powder core flux-cored wire and preparation method thereof |
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| CN114952071B (en) * | 2022-05-30 | 2024-02-27 | 北京智双科技发展有限公司 | Surfacing wear-resistant flux-cored wire for titanium-based drill rod and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1872486A (en) * | 2005-06-01 | 2006-12-06 | 林肯环球公司 | Modified flux system |
| CA2711748A1 (en) * | 2008-01-25 | 2009-07-30 | Sumitomo Metal Industries, Ltd. | Welding material and welded joint structure |
| CN101966631A (en) * | 2009-07-28 | 2011-02-09 | 中国科学院金属研究所 | Low-cost titanium alloy welding wire suitable for welding titanium alloy at high temperature of over 520 DEG C |
| 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 |
| CN108856941A (en) * | 2018-08-16 | 2018-11-23 | 辽宁工业大学 | A kind of composite soldering and its method for being brazed TC4 titanium alloy |
| CN111745268A (en) * | 2020-06-05 | 2020-10-09 | 中国兵器科学研究院宁波分院 | Self-protection flux-cored wire suitable for TC4 titanium alloy welding and preparation method thereof |
-
2020
- 2020-11-25 CN CN202011335293.0A patent/CN112404798B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1872486A (en) * | 2005-06-01 | 2006-12-06 | 林肯环球公司 | Modified flux system |
| CA2711748A1 (en) * | 2008-01-25 | 2009-07-30 | Sumitomo Metal Industries, Ltd. | Welding material and welded joint structure |
| CN101966631A (en) * | 2009-07-28 | 2011-02-09 | 中国科学院金属研究所 | Low-cost titanium alloy welding wire suitable for welding titanium alloy at high temperature of over 520 DEG C |
| 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 |
| CN108856941A (en) * | 2018-08-16 | 2018-11-23 | 辽宁工业大学 | A kind of composite soldering and its method for being brazed TC4 titanium alloy |
| CN111745268A (en) * | 2020-06-05 | 2020-10-09 | 中国兵器科学研究院宁波分院 | Self-protection flux-cored wire suitable for TC4 titanium alloy welding and preparation method thereof |
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