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Ti/Al composite wire for additive manufacturing of TiAl alloy and preparation method of Ti/Al composite wire

A technology of additive manufacturing and composite wire, which is applied in manufacturing tools, additive processing, metal processing equipment, etc., can solve the problems of poor plasticity at room temperature of TiAl alloy, and it is difficult to use additive manufacturing. Quality, dense structure

Active Publication Date: 2021-10-22
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

By designing the composition and cross-sectional area of ​​the inner core material and outer layer material of Ti / Al composite wire, this method ensures the synergistic deformation of the outer layer material and the inner core material during the preparation process, and meets the atomic percentage requirements of the TiAl alloy, solving the problem of TiAl Alloys with poor room temperature plasticity are difficult to achieve wire drawing and difficult to be used in additive manufacturing

Method used

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  • Ti/Al composite wire for additive manufacturing of TiAl alloy and preparation method of Ti/Al composite wire
  • Ti/Al composite wire for additive manufacturing of TiAl alloy and preparation method of Ti/Al composite wire
  • Ti/Al composite wire for additive manufacturing of TiAl alloy and preparation method of Ti/Al composite wire

Examples

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Embodiment 1

[0031] In this embodiment, the Ti / Al composite wire for the additive manufacturing of TiAl alloy is made of an inner core material of 1080 aluminum rod and an outer material TA1 titanium tube coated on the inner core material; the cross-section of the TA1 titanium tube and the 1080 aluminum rod The area ratio is 0.93:1.

[0032] The preparation method of Ti / Al composite wire for additively manufacturing TiAl alloy in this embodiment comprises the following steps:

[0033] Step 1. According to the production of the target product Ti / Al composite wire, select a TA1 titanium tube of Φ15mm×2.1mm (outer diameter×wall thickness) and a 1080 aluminum rod of Φ10.8mm×1m (diameter×length) for pickling in sequence and ultrasonic cleaning to obtain clean TA1 titanium tubes and 1080 aluminum rods;

[0034] Step 2, importing the clean 1080 aluminum rod obtained in step 1 into clean TA1 titanium to obtain a composite wire blank;

[0035] Step 3: Perform swaging and intermediate annealing trea...

Embodiment 2

[0044] The difference between this example and Example 1 is that the system of swaging and intermediate annealing in step 3 is: when the amount of swaging deformation is 30%, stress relief annealing is performed, and the temperature of stress relief annealing is 610°C , the time is 70 minutes; the drawing and intermediate annealing treatment system in step 4 is: when the drawing deformation is 10%, the stress relief annealing is carried out, the temperature of the stress relief annealing is 550 ° C, and the time is 60 minutes.

[0045] The Ti / Al composite wire prepared in this example was used to prepare TiAl alloy by arc additive manufacturing. The obtained TiAl alloy had good molding quality, smooth surface, and no defects such as cracks, pores, welding spots, and oxidation.

Embodiment 3

[0047] The difference between this example and Example 1 is that the system of swaging and intermediate annealing in step 3 is: when the amount of swaging deformation is 25%, stress relief annealing is performed, and the temperature of stress relief annealing is 600°C , the time is 90 minutes; the drawing and intermediate annealing treatment system in step 4 is: when the drawing deformation is 15%, the stress relief annealing is carried out, the temperature of the stress relief annealing is 580 ° C, and the time is 80 minutes.

[0048] The Ti / Al composite wire prepared in this example was used to prepare TiAl alloy by arc additive manufacturing. The obtained TiAl alloy had 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 Ti / Al composite wire for additive manufacturing of TiAl alloy. The Ti / Al composite wire is prepared from an inner core material and an outer layer material coating the inner core material. The invention further discloses a preparation method of the Ti / Al composite wire. The preparation method comprises the following steps of treating the outer layer material and the inner core material, carrying out introducing and assembling, and sequentially carrying out rotary swaging and drawing to obtain the Ti / Al composite wire. According to the Ti / Al composite wire and the preparation method thereof, by designing the components and cross sectional areas of the inner core material and the outer layer material, the synergistic deformation of the inner core material and the outer layer material is ensured, the atomic percentage requirement of the TiAl alloy is met, and the problems that the TiAl alloy has poor room-temperature plasticity and wire drawing forming for additive manufacturing is difficult to achieve are solved; and according to the preparation method, by adjusting the pass deformation amount of rotary swaging and drawing and the annealing temperature interval, generation of Ti / Al interface intermetallic compounds is restrained, the Ti / Al composite wire with good structure uniformity and performance consistency is obtained, and cracking of the Ti / Al composite wire is avoided.

Description

technical field [0001] The invention belongs to the technical field of TiAl alloy preparation, and in particular relates to a Ti / Al composite wire for additive manufacturing of TiAl alloy and a preparation method thereof. Background technique [0002] TiAl alloy is an intermetallic compound formed by Ti and Al in an almost equal atomic ratio. Its density is less than half that of Ni-based superalloys. It also has high specific strength, specific modulus, creep resistance, excellent high-temperature mechanical properties and Oxidation resistance and other advantages, so it is considered to be one of the most promising high-temperature structural materials to replace Ni-based superalloys in the range of 600 ° C to 900 ° C. However, as an intermetallic compound, TiAl alloys exhibit poor processability due to the low mobility of superlattice dislocations and the lack of sufficient deformation modes. At present, TiAl alloys are mainly produced by ingot metallurgy, precision cast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/12B23K35/40B23K35/24B33Y70/00
CPCB23K35/0261B23K35/40B23K35/24B33Y70/00
Inventor 陈曦汪舸贺智锋赵婧辛超赵彬张于胜
Owner 西安稀有金属材料研究院有限公司
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