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Alpha titanium alloy manual tungsten-electrode argon-shielded tungsten arc welding refined grain type welding wire and preparation method thereof

A technology for argon tungsten arc welding and grain refinement is applied to the welding wire material, the preparation of the welding wire, and the field of α-type titanium alloy manual tungsten argon arc welding to refine the grain type welding wire, which can solve the difference in electrochemical performance, Coarseness, affecting the performance of joints, etc., to achieve the effect of low production cost, small splash, and beautiful molding

Active Publication Date: 2009-06-17
JIANGSU XINYE HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the tensile strength of the weld metal obtained by this welding wire can reach ≥800MPa, the electrochemical properties of the weld are quite different from those of the base metal due to the coarse grains of the weld structure, which affects its joint performance

Method used

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  • Alpha titanium alloy manual tungsten-electrode argon-shielded tungsten arc welding refined grain type welding wire and preparation method thereof
  • Alpha titanium alloy manual tungsten-electrode argon-shielded tungsten arc welding refined grain type welding wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Take 450g Al, 60g potassium fluoroborate, 14475g grade 0 sponge titanium, add Al and potassium fluoroborate to grade 0 sponge titanium to obtain an alloy mixture, and use a 15kg vacuum consumable electric arc furnace to melt the obtained alloy mixture and cast a lot of ingots in 3 times. After smelting, remove the shrinkage cavities of the ingot and remove the skin to a thickness of 3-4mm, then carry out billet forging. The ingot is forged with a press at 1800-2000℉. For titanium, the selection forging standard is: 1300±10°C, heat preservation for 1h; the solder free forging after blank forging is Φ16mm bar, the free forging standard is: heating temperature 970±10°C, holding time: 0.5~1h; Stress, to make the structure uniform, the bar after free forging is first annealed. The heat treatment temperature is 820±10°C, heat preservation for 1h, and air cooling. The hot-rolled thin rods are drawn on the wire drawing equipment, and during the wire drawing process, the thin ...

Embodiment 2

[0070] Take 600g Al, 90g graphite, and 14295g 0-grade sponge titanium, add Al and graphite to 0-grade sponge titanium to obtain an alloy mixture; melt the obtained alloy mixture in a 15-kg vacuum consumable electric arc furnace and cast ingots of not less than 3 Second-rate. After smelting, remove the shrinkage cavities of the ingot and remove the skin to a thickness of 3-4mm, then carry out billet forging. The ingot is forged with a press at 1800-2000℉. For titanium, the selection forging standard is: 1300±10°C, heat preservation for 1h; the solder free forging after blank forging is Φ16mm bar, the free forging standard is: heating temperature 970±10°C, holding time: 0.5~1h; Stress, to make the structure uniform, the bar after free forging is first annealed. The heat treatment temperature is 820±10°C, heat preservation for 1h, and air cooling. The hot-rolled thin rods are drawn on the wire drawing equipment, and during the wire drawing process, the thin rods are continuousl...

Embodiment 3

[0077]Take 750g Al, 142.5g graphite, and 14100g grade 0 sponge titanium, add Al and graphite to grade 0 sponge titanium to obtain an alloy mixture; use 15 kg of vacuum consumable electric arc furnace to melt the obtained alloy mixture and cast ingots not less than 3 times. After smelting, remove the shrinkage cavities of the ingot and remove the skin to a thickness of 3-4mm, then carry out billet forging. The ingot is forged with a press at 1800-2000℉. For titanium, the selection forging standard is: 1300±10°C, heat preservation for 1h; the solder free forging after blank forging is Φ16mm bar, the free forging standard is: heating temperature 970±10°C, holding time: 0.5~1h; Stress, to make the structure uniform, the bar after free forging is first annealed. The heat treatment temperature is 820±10°C, heat preservation for 1h, and air cooling. The hot-rolled thin rods are drawn on the wire drawing equipment, and during the wire drawing process, the thin rods are continuously ...

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Abstract

The invention discloses refinement grain type welding wires for an alpha type titanium alloy manual argon tungsten arc welding machine. The welding wires are divided into a Ti-AL series and a Ti-B series. A welding wire of Ti-Al series comprises the following components in percentage by mass: 3 to 5 percent of AL, 0 to 0.4 percent of B, 0 to 1 percent of C and 93.6 to 96.2 percent of 0-grade titanium sponge. A welding wire of Ti-B series comprises the following components in percentage by mass: 0.4 to 0.6 percent of B, 0.02 to 0.4 percent of Si, 0.2 to 0.4 percent of C and 98.6 to 99.38 percent of 0-grade titanium sponge. The welding wires are made by the steps of melting, shrinkage hole removal, surface machining, billet forging, annealing treatment, hot rolling, drawing and vacuum hydrogen removal. The welding wires of the invention have small weld structure, high tensile strength, high Vickers hardness, excellent welding technical performance and lower production cost, are applicable to large titanium components and realize small electrochemical performance difference between the weld and a parent material.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a welding wire material, in particular to an α-type titanium alloy manual tungsten argon arc welding fine-grained welding wire, and also relates to a preparation method of the welding wire. Background technique [0002] At present, industrial pure titanium TA1 is widely used in the chemical industry due to its plasticity, toughness, corrosion resistance, good weldability and easy molding. However, using pure titanium as the filler material, the weld structure obtained by manual argon tungsten arc welding is quite coarse, which not only affects the mechanical and electrochemical properties of the welded joint, but also affects the future performance of the weldment. Foreign countries use matte treatment to solve this problem, which can solve the problem of uneven electrochemical properties between the weld and the base metal, but for large titanium components, this treatment method...

Claims

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Application Information

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IPC IPC(8): B23K35/22B23K35/40
Inventor 张敏吕娜李继红
Owner JIANGSU XINYE HEAVY IND
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