Method for preparing TiAl alloy through melting with consumable vacuum arc furnace

A vacuum consumable arc and alloy technology, applied in the field of smelting TiAl alloys in a vacuum consumable arc furnace, can solve the problems of large difference in melting point, high melting reaction heat, and easy cracks, etc., and achieve uniform structure size and simple process , low-cost effect

Active Publication Date: 2013-02-06
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large difference in the melting point of each component of the alloy and the high melting reaction heat, the alloy has obvious defects such as pores and segregation during the preparation process, and it is also prone to serious quality problems such as cracks.

Method used

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  • Method for preparing TiAl alloy through melting with consumable vacuum arc furnace
  • Method for preparing TiAl alloy through melting with consumable vacuum arc furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The TiAl alloy is smelted in a vacuum consumable electric arc furnace, and the specific steps are as follows:

[0022] (a) Weighing: Weigh and mix metal Ti and metal Al according to the mass ratio of Ti 87.5% and Al 12.5%;

[0023] (b) Pressed electrodes: press the mixed metal Ti and Al in proportion to make electrodes, and each electrode is controlled at 2.2 kg;

[0024] (c) Welding electrodes: every two pressed electrodes are welded into smelting electrodes by argon tungsten arc welding;

[0025] (d) Vacuum consumable melting primary ingot: melt the welded TiAl electrode in a 10kg vacuum consumable arc melting furnace with a current of 2.0kA and a working vacuum of 1.0×10E -1 Pa, use a copper crucible with a diameter of 80mm to melt a TiAl primary ingot with a diameter of 80mm;

[0026] (e) Welding secondary smelting electrodes: remove the head and flat tail of the smelted primary ingots with a lathe, and weld each 6 primary ingots into secondary electrodes by tungs...

Embodiment 2

[0029] The TiAl alloy is smelted in a vacuum consumable electric arc furnace, and the specific steps are as follows:

[0030] (a) Weighing: Weigh and mix metal Ti and metal Al according to the mass ratio of Ti 75% and Al 25%;

[0031] (b) Pressed electrodes: Weigh the mixed metal Ti and Al in proportion to press them into electrodes, and each electrode is controlled at 4.0 kg;

[0032] (c) Welding electrodes: every two pressed electrodes are welded into smelting electrodes by argon tungsten arc welding;

[0033] (d) Vacuum consumable melting primary ingot: melt the welded TiAl electrode in a 10kg vacuum consumable arc melting furnace with a current of 1.8kA and a working vacuum of 1.0×10E -1 Pa, use a copper crucible with a diameter of 80mm to melt a TiAl primary ingot with a diameter of 80mm;

[0034] (e) Welding secondary smelting electrodes: remove the head and flat tail of the smelted primary ingots with a lathe, and weld each 6 primary ingots into secondary electrodes b...

Embodiment 3

[0037] The TiAl alloy is smelted in a vacuum consumable electric arc furnace, and the specific steps are as follows:

[0038] (a) Weighing: Weigh and mix metal Ti and metal Al according to the mass ratio of Ti 64% and Al 36%;

[0039] (b) Pressed electrodes: Weigh the mixed metal Ti and Al in proportion to press them into electrodes, and each electrode is controlled at 2.8 kg;

[0040] (c) Welding electrodes: every two pressed electrodes are welded into smelting electrodes by argon tungsten arc welding;

[0041] (d) Welding secondary smelting electrodes: Melt the welded TiAl electrodes in a 10kg vacuum consumable arc melting furnace with a current of 1.5kA and a working vacuum of 1.0×10E -1 Pa, use a copper crucible with a diameter of 80mm to melt a TiAl primary ingot with a diameter of 80mm;

[0042] (e) Vacuum self-consumption smelting of secondary ingots: remove the heads and tails of the smelted primary ingots with a lathe, and weld each 6 primary ingots into secondary e...

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Abstract

The invention discloses a method for preparing a TiAl alloy through melting a consumable vacuum arc furnace. The method comprises the following steps: 1, weighing a metal Ti and a metal Al, and mixing; 2, respectively suppressing the well mixed metal Ti and Al into a 2.2-4.0 kg electrode; 3, welding two electrodes into a melting electrode; 4, melting the welded TiAl electrode in a 10kg of the consumable vacuum arc furnace, and preparing TiAl primary ingots with the diameter of 80mm; 5, cutting off the head and flattening the end through melting with the primary ingots, and preparing a secondary electrode through welding each six primary ingots with an argon tungsten arc welder; and 6, melting the welded TiAl secondary electrode in a 150kg consumable vacuum arc furnace, and preparing TiAl secondary ingots with the diameter of 120mm. In the weighed metal Ti and the metal Al, the weight percentage content of Ti is 50-87.5%, and the weight percentage content of Al is 12.5-50%. Compared with the prior art, the method of the present invention which has the advantages of simple technology and low cost allows a TiAl alloy target material with no obvious defects of pores, segregation and the like and uniform size of the structure.

Description

technical field [0001] The invention relates to a method for preparing an intermetallic compound alloy target, in particular to a method for melting TiAl alloy in a vacuum consumable electric arc furnace. Background technique [0002] Magnetron sputtering coating is a new type of physical vapor coating method. Compared with the earlier evaporation coating method, its advantages in many aspects are quite obvious. As a relatively mature technology that has been developed, magnetron sputtering has been applied in many fields. Magnetron sputtering coating targets are divided into metal sputtering coating targets, alloy sputtering coating targets, ceramic sputtering coating targets, boride ceramic sputtering targets, carbide ceramic sputtering targets, fluoride ceramic sputtering targets Sputtering targets, nitride ceramic sputtering targets, oxide ceramic targets, etc. Ti-Al alloy target is the core material of multi-arc ion plating (Ti, Al) N film, which requires uniform comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22B9/20C22C14/00C23C14/14
Inventor 陈科吕维洁王立强王敏敏覃继宁张荻
Owner SHANGHAI JIAO TONG UNIV
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