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Microalloying method for improving strength and plasticity matching of titanium alloy welding wire

A technology of microalloying and titanium alloy wire, applied in welding equipment, welding medium, metal processing equipment, etc., can solve the problems of incomplete matching of strength and plasticity, substandard plasticity, lack of strength, etc., and achieve uniformity of internal microstructure The effect of controlling the amount of deformation during processing and improving the strength

Active Publication Date: 2022-07-22
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the TA17-2B titanium alloy, the alloy prepared within its nominal composition range, and the wire prepared by conventional processing methods usually have strength and plasticity that cannot be completely matched, that is, there is a phenomenon that the strength is lacking or the plasticity is not up to standard.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method of this embodiment includes the following steps:

[0023] Step 1. Use MHT-90 grade small particle titanium sponge, Al-V master alloy, aluminum beans, TiO 2 The powder is alloyed according to the nominal composition Ti-1.8Al-2.05V-0.07O, mixed and pressed into a consumable electrode, and then the consumable electrode is smelted by vacuum consumable arc three times to obtain TA17-2B titanium alloy cast. Ingot; the TA17-2B titanium alloy ingot is composed of the following components by mass percentage: Al 1.5%, V 2.0%, Fe 0.021%, O 0.062%, C 0.016%, N 0.006%, H0.0011%, Si 0.04%, the rest is Ti;

[0024] In step 2, the TA17-2B titanium alloy ingot obtained in step 1 is sequentially forged at 250°C above the phase transition point, forged at 100°C above the phase transition point, and then two-phase at 20°C below the phase transition point. Zone forging to obtain forging billet, then rolling at 50 °C below the transformation point, and hot circular drawing at 85...

Embodiment 2

[0028] The method of this embodiment includes the following steps:

[0029] Step 1. Use MHT-90 grade small particle titanium sponge, Al-V master alloy, aluminum beans, TiO 2 The powder is alloyed according to the nominal composition Ti-1.8Al-1.2V-0.05O, mixed and pressed into a consumable electrode, and then the consumable electrode is smelted by vacuum consumable arc three times to obtain TA17-2B titanium alloy cast. Ingot; the TA17-2B titanium alloy ingot is composed of the following components by mass percentage: Al 1.75%, V 1.0%, Fe 0.012%, O 0.049%, C 0.012%, N 0.005%, H0.0007% , Si 0.03%, the rest is Ti;

[0030] In step 2, the TA17-2B titanium alloy ingot obtained in step 1 is sequentially forged at 180°C above the phase transition point, forged at 80°C above the phase transition point, and then two-phase at 30°C below the phase transition point. Zone forging to obtain forging billets, then rolling at 40 °C below the transformation point, and hot circular drawing at 8...

Embodiment 3

[0034] The method of this embodiment includes the following steps:

[0035] Step 1. Use MHT-95 grade small particle titanium sponge, Al-V master alloy, aluminum beans, TiO 2 The powder is alloyed according to the nominal composition Ti-2.5Al-1.72V-0.05O, mixed and pressed into a consumable electrode, and then the consumable electrode is smelted by vacuum consumable arc three times to obtain TA17-2B titanium alloy cast. Ingot; the TA17-2B titanium alloy ingot is composed of the following components by mass percentage: Al 2.2%, V1.7%, Fe 0.021%, O 0.04%, C 0.008%, N 0.003%, H0.0011% , Si% 0.01%, the rest is Ti;

[0036] In step 2, the TA17-2B titanium alloy ingot obtained in step 1 is sequentially forged at 250°C above the phase transition point, forged at 100°C above the phase transition point, and then two-phase at 50°C below the phase transition point. Zone forging to obtain forging billet, then rolling at 50 °C below the transformation point, and hot circular drawing at 85...

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Abstract

The invention discloses a microalloying method for improving matching of strength and plasticity of a titanium alloy welding wire. The microalloying method comprises the following steps: 1, mixing raw materials, pressing the mixed raw materials into a consumable electrode, and carrying out vacuum consumable arc melting for three times; secondly, cogging forging, two-phase region forging, rolling and hot rounding drawing are conducted in sequence; thirdly, cold rolling and roller milling stretching machining are conducted, and a TA17-2B titanium alloy wire is obtained; and fourthly, the TA17-2B titanium alloy welding wire is obtained through multi-stage vacuum annealing treatment. According to element classification and the effect of all elements in titanium alloy, the strength and plasticity of the TA17-2B titanium alloy welding wire are well matched by accurately controlling the content of an alpha stable element, an interstitial element and a beta stable element in alloy components, meanwhile, the large-deformation forging process, the rolling process and the roller milling stretching process are combined, and the welding quality of the TA17-2B titanium alloy welding wire is improved. The high-quality TA17-2B titanium alloy welding wire which is uniform in structure, matched in strength and plasticity and good in surface quality is obtained, and the requirements of welding wire materials for engineering are met.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy preparation, and particularly relates to a microalloying method for improving the strong-plastic matching of a titanium alloy welding wire. Background technique [0002] Titanium alloys are widely used in aviation, aerospace, ships, nuclear industry and weapons due to their excellent properties such as high strength, low density, high temperature resistance and corrosion resistance. Wires, rings, foils and forgings, precision forming parts, etc. Titanium and titanium alloy wire, as an important product of titanium series, have made great progress in terms of output, specification and application. At present, more than 80% of titanium and titanium alloy wire are used as welding wire, such as various Welding of titanium equipment, welded pipes, repair welding of turbine disks and blades of jet engines, welding of casings, and nuclear power fields. In recent years, due to the continuous deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/40B23K35/32
CPCB23K35/40B23K35/325
Inventor 郭萍毛小南潘浩洪权张菁丽侯红苗张永强秦成
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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