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Argon arc welding method for discontinuously reinforced titanium matrix composites

A technology of titanium-based composite material and welding method, which is applied in welding equipment, arc welding equipment, welding/welding/cutting objects, etc., to achieve the effects of simple operation, low cost of welding equipment and high strength of welded joints

Active Publication Date: 2015-10-28
SHANGHAI JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To sum up, so far, people have not found an effective welding method that is widely used in the connection of metal matrix composites, especially the actual structure of discontinuously reinforced titanium matrix composites.

Method used

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  • Argon arc welding method for discontinuously reinforced titanium matrix composites
  • Argon arc welding method for discontinuously reinforced titanium matrix composites
  • Argon arc welding method for discontinuously reinforced titanium matrix composites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The 0.5mm thick 3% (TiB+TiC) / Ti1100 titanium-based composite material plate is wire-cut and processed into a 150×100mm weldment. The ratio is 1:5, the temperature is 40°C, rinsed with warm water, and dried; then, 60wt% NaOH+15wt%KOH+25wt%NaNO 3 Soak in the molten concentrated alkali solution for 15 minutes, rinse with warm water and dry; after that, put the board in 0.1% HF + 5% HNO at room temperature 3 Soak in +30% HCl solution for 10min, carry out pickling treatment; then, in 10% HNO at 40℃ 3 +1% HF solution for 2 minutes of bright treatment, rinse with water and dry. Finally, press the pretreated parts to be welded with welding fixtures, implement butt welding structure, and protect the weld seam with argon gas on the front and back of the weldment. The flow rate is 5L / min, the welding process parameters are adjusted, the voltage is 8V, the current is 60A, the welding speed is 35cm / min, and the argon arc welding of discontinuously reinforced titanium matrix compos...

Embodiment 2

[0044] 1.0mm thick 5% (TiB+TiC+La 2 o 3 ) / Ti-6.6Al-4.6Sn-4.6Zr-0.9Nb-1.0Mo-0.32Si titanium-based composite material plate is processed into 150×100mm weldment by wire cutting, and the surface treatment of the plate is carried out before welding. Degreaser, its ratio with water is 1:10, the temperature is 50 ℃, warm water rinses, dry; Then, at 450 ℃ 70wt%NaOH+5wt%KOH+25wt%NaNO 3 Soak in the molten concentrated alkali solution for 15min, rinse with warm water and dry; then put the board in 0.2%HF+3%HNO 3 Soak in +35% HCl solution for 15min, carry out pickling treatment; then in 20% HNO at 45°C 3 Light treatment in +2% HF solution for 3 minutes, rinse with water, and dry. Finally, press the pretreated parts to be welded with welding fixtures, implement butt welding structure, and protect the weld seam with argon gas on the front and back of the weldment. The flow rate is 10L / min, the welding process parameters are adjusted, the voltage is 9V, the current is 80A, the welding s...

Embodiment 3

[0046] 1.5mm thick 2% (TiB+Y 2 o 3 ) / Ti-6Al-4V titanium-based composite sheet wire cutting process into 150 × 100mm weldment, the surface treatment of the sheet before welding, use NCRT-202 type degreasing agent, its ratio with water is 1:20 , the temperature is 60°C, rinsed with warm water, and dried; then in 75wt% NaOH+5wt%KOH+20wt%NaNO 3 Soak in the molten concentrated alkali solution for 13min, rinse with warm water and then dry, the plate is 0.5%HF+5%HNO at room temperature 3 Soak in +30% HCl solution for 15min, pickle, then in 35%HNO at 50℃ 3 Light treatment in +2.5% HF solution for 5 minutes, rinse with water, and dry. Press the pre-treated parts to be welded with a special welding fixture, and implement the butt welding structure. The front and back of the weldment are protected by argon gas to protect the weld seam. The gas flow rate is 20L / min, and the tail-trailing cover protective gas flow rate is 14L. / min, adjust the welding process parameters, the voltage is...

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Abstract

The invention relates to an argon arc welding method of a non-continuous reinforcement titanium-matrix composite material. The method comprises the following steps of: cutting non-continuous reinforcement titanium-matrix composite base metal to be with required weldment size, removing oil contamination and other impurities adhered to the surface of a weldment through degreasing agent, flushing the weldment through running water, and drying; putting the weldment in molten concentrated alkaline solution so as to carry out thermokalite explosion processing, flushing through warm water, and drying; putting the weldment in mixed acid solution with a certain proportion so as to carry out pickling, flushing through normal-temperature running water, and drying; putting the weldment in specified acid solution so as to carry out bright processing, flushing through clear water, and drying for standby; and finally, clamping the weldment to be welded through a welding fixture and then carrying out butt joint or lap joint, applying pure argon on a front side, a reverse side and a stern tow cover so as to protect a welded seam, adjusting welded voltage and current, and realizing the argon arc welding of the non-continuous reinforcement titanium-matrix composite at a certain welding speed. The method has the advantages of simplicity, easiness to implement, low cost, high strength of a welding joint, and suitability for scale industrial production.

Description

technical field [0001] The invention relates to the field of metal materials, especially the technical field of material connection in the secondary processing technology of titanium-based composite materials, and in particular to an argon arc welding method for discontinuously reinforced titanium-based composite materials. Background technique [0002] Discontinuously reinforced titanium matrix composites (TMCs) have broad application prospects and development potential in aerospace and other fields due to their high specific strength, specific stiffness, and good high temperature and corrosion resistance. , has become an ideal candidate material for hypersonic aerospace vehicles and advanced aero-engines, and has good engineering application prospects in gas turbine engine fan blades, aircraft landing gear, aircraft frame structures, and missile structures. [0003] At present, a lot of research work has been carried out on the preparation process, molding process, high te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K9/23B23K9/235C23G1/00B23K103/16
Inventor 毛建伟朱晓星吕维洁张小龙王立强孙锡建覃继宁张荻
Owner SHANGHAI JIAOTONG UNIV
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