Titanium flux-cored wire for additive manufacturing of titanium-aluminum intermetallic compound and preparation method of titanium flux-cored wire

A technology of intermetallic compounds and flux-cored wire, applied in metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problem of poor plasticity at room temperature and it is difficult to realize wire drawing into forming welding wire, etc., achieve excellent filling effect, refine grain, The effect of improving mechanical properties

Active Publication Date: 2021-08-13
西安稀有金属材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The titanium flux-cored wire is formed by wrapping the powder core in the titanium shell, which solves the problem that the poor plasticity of the titanium-aluminum intermetallic compound at room temperature is difficult to realize the wire drawing into a forming welding wire, and realizes the use of a single welding wire for the titanium-aluminum intermetallic compound. The preparation of titanium flux-cored wire deposition makes the components formed have good strong plasticity matching

Method used

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  • Titanium flux-cored wire for additive manufacturing of titanium-aluminum intermetallic compound and preparation method of titanium flux-cored wire
  • Titanium flux-cored wire for additive manufacturing of titanium-aluminum intermetallic compound and preparation method of titanium flux-cored wire
  • Titanium flux-cored wire for additive manufacturing of titanium-aluminum intermetallic compound and preparation method of titanium flux-cored wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The titanium flux-cored welding wire used in the arc additive manufacturing of titanium-aluminum intermetallic compounds in this embodiment consists of a flux core wrapped with a titanium shell, the flux core is in powder state, and the titanium flux-cored welding wire consists of the following molar percentages: The composition of the composition: 44% of Al, 4% of Nb, 1.5% of Mo, 0.15% of B and the balance of Ti and unavoidable impurities.

[0029] The preparation method of the titanium flux-cored welding wire of the present embodiment comprises the following steps:

[0030] Step 1. Pickling and ultrasonic cleaning the titanium tube in sequence to obtain a clean titanium tube; the ratio of the outer diameter to the inner diameter of the titanium tube is 1.4:1;

[0031] Step 2, placing Al powder, Nb powder, Mo powder and B powder in a ball mill, and then ball milling under an inert gas atmosphere to obtain a composite powder;

[0032] Step 3, filling the clean titanium...

Embodiment 2

[0039] The difference between this embodiment and embodiment 1 is that the sealing in step 3 is performed by laser welding, the stress annealing treatment in step 4 takes 60 minutes and the temperature is 630°C.

[0040] The titanium flux-cored welding wire prepared in this example is prepared by arc additive manufacturing method to prepare titanium-aluminum intermetallic compounds. The obtained titanium-aluminum intermetallic compounds have good molding quality, smooth surface, and no defects such as cracks, pores, welding spots, and oxidation. .

Embodiment 3

[0042] The difference between this embodiment and embodiment 1 is that the sealing in step 3 is carried out by electron beam welding, the time of stress annealing in step 4 is 50 min, and the temperature is 640°C.

[0043] The titanium flux-cored welding wire prepared in this example is prepared by arc additive manufacturing method to prepare titanium-aluminum intermetallic compounds. The obtained titanium-aluminum intermetallic compounds have good molding quality, smooth surface, and no defects such as cracks, pores, welding spots, and oxidation. .

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Abstract

The invention discloses a titanium flux-cored wire for additive manufacturing of a titanium-aluminum intermetallic compound. The titanium flux-cored wire is composed of a powder-state flux core wrapped with a titanium shell, and the titanium flux-cored wire is composed of the following components including, by molar percentage, 40%-50% of Al, 1%-8% of Nb, 1%-4% of Mo, 0.1%-0.5% of B and the balance Ti and inevitable impurities; and in addition, the invention further provides a preparation method of the titanium flux-cored wire, the Al powder, the Nb powder, the Mo powder and the B powder are put into a clean titanium tube after being subjected to ball milling, sealing is conducted, then drawing is conducted, and the titanium flux-cored wire is obtained. According to the titanium flux-cored wire, the powder-state flux core is wrapped with the titanium shell to form the titanium flux-cored wire, the problem that the titanium-aluminum intermetallic compound is poor in room-temperature plasticity and difficult to be drawn into a formed welding wire is solved, preparation of the titanium-aluminum intermetallic compound through the single welding wire is achieved, and the component formed by deposition of the titanium flux-cored wire has good strength and plasticity matching.

Description

technical field [0001] The invention belongs to the technical field of titanium-aluminum intermetallic compounds, and in particular relates to a titanium flux-cored welding wire for additively manufacturing titanium-aluminum intermetallic compounds and a preparation method thereof. Background technique [0002] Titanium-aluminum intermetallic compounds, because of their high specific strength, specific modulus, good oxidation resistance, and creep resistance, are considered to be one of the high-temperature structural materials that are expected to replace Ni-based superalloys in the new century. However, titanium-aluminum intermetallic alloys exhibit poor processability at room temperature due to the low mobility of superlattice dislocations and the lack of sufficient deformation modes. At present, titanium-aluminum intermetallic compounds can only be processed by casting and high-temperature plastic forming, and their high manufacturing cost and long manufacturing cycle li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/02B23K35/32B23K35/40
CPCB23K35/0266B23K35/325B23K35/40
Inventor 陈曦李欢张思雨辛超汪舸赵彬潘晓龙
Owner 西安稀有金属材料研究院有限公司
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