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A kind of "thermo-electric" coupling unclad preparation method of tial alloy plate

A technology of alloy sheet and sheath, which is applied in the field of "thermo-electric" coupled no-sheath preparation of TiAl alloy sheet, can solve the problems of poor uniformity and mechanical properties of the sheet, poor deformation coordination, and low material utilization rate, etc., to avoid Effects of absorbing rolling deformation, reducing deformation resistance, and improving composition and grain size unevenness

Active Publication Date: 2021-04-23
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims at the problems of complex process, high cost of sheathing, poor deformation coordination and low material utilization rate of ingot metallurgy clad rolling method, and difficult problems of powder metallurgy and foil metallurgy composition control, plate uniformity and poor mechanical properties , providing a "thermo-electric" coupling uncoated preparation method for a TiAl alloy sheet

Method used

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  • A kind of "thermo-electric" coupling unclad preparation method of tial alloy plate
  • A kind of "thermo-electric" coupling unclad preparation method of tial alloy plate

Examples

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Effect test

Embodiment 1

[0039] The preparation method of Ti-44Al-8Nb-(B, Y) alloy plate "thermo-electric" coupling without jacket is as follows:

[0040] Step 1, weighing raw materials:

[0041]According to the atomic percentage of each component, the alloy composition is 44% Al, 8% Nb, 0.1% X (X is a 1:1 combination of B and Y elements), and the balance is Ti and unavoidable impurity elements. Weigh high-purity titanium sponge, high-purity aluminum, aluminum-niobium alloy (with a Nb content of 54.56%), aluminum-yttrium alloy (with a Y content of 87.3%), and a total of 10Kg of boron powder as raw materials.

[0042] Step 2. Ingot melting and casting:

[0043] The high-purity sponge titanium, high-purity aluminum, aluminum-niobium alloy, aluminum-yttrium alloy, and boron powder weighed in step 1 are added to a water-cooled copper crucible for melting in a vacuum induction shell melting furnace. The melting atmosphere is an argon atmosphere, and the argon pressure is 0.95~1MPa, the mass purity of arg...

Embodiment 1

[0058] The TiAl alloy sheet material surface quality that embodiment 1 step 5 obtains is good, without obvious crack, as figure 1 shown.

Embodiment 2

[0060] The preparation method of Ti-43Al-4Nb-2Mo-2V-0.5Ni alloy plate "thermo-electric" coupling without jacket is as follows:

[0061] Step 1, weighing raw materials:

[0062] According to the atomic percentage of each component, the alloy composition is 43% Al, 4% Nb, 2% V, 2% Mo, 0.5% Ni, and the balance is Ti and unavoidable impurity elements. Weigh high-purity titanium sponge, high-purity aluminum, aluminum-niobium alloy (Nb content is 54.56%), aluminum-molybdenum alloy (Mo content is 55.35%), aluminum-vanadium alloy (V content is 52.12%), and high-purity nickel powder in total 15Kg as raw material.

[0063] Step 2. Ingot melting and casting:

[0064] Add the high-purity sponge titanium, high-purity aluminum, aluminum-niobium alloy, aluminum-molybdenum alloy, aluminum-vanadium alloy, and high-purity nickel powder weighed in step 1 into a water-cooled copper crucible for melting in a vacuum induction shell melting furnace, and pour the melt to 500 In the metal casting m...

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Abstract

The invention relates to the field of preparation of alloy materials, in particular to a method for preparing a TiAl alloy plate with "thermal-electricity" coupling without sheathing; High, poor plate shape, low material utilization, and overcome the problems of high impurity content, high cost, low density, and low production efficiency in powder metallurgy. The specific steps are: 1. Weighing each raw material component; 2. Vacuum induction shell melting + metal mold casting to prepare ingot; 3. Billet pretreatment 1; 4. Billet pretreatment 2; 5. Plate "thermo-electric" The TiAl alloy plate can be obtained by coupling rolling without sheathing; the plate obtained in the present invention has good surface quality, no oxide layer falling off, no cracking at the edge and end, uniform and fine structure of the plate, and good mechanical properties.

Description

technical field [0001] The invention relates to the field of preparation of alloy materials, in particular to a "thermo-electric" coupling non-sheathing preparation method of a TiAl alloy plate. Background technique [0002] As a new type of high-temperature structural material with light weight, high specific strength, good high-temperature oxidation resistance and creep resistance, TiAl alloy sheet has great application prospects in aerospace fields such as the thermal protection system of space-to-ground aircraft, and the skin of supersonic aircraft. . However, due to the intrinsic brittleness of intermetallic compounds, the poor high-temperature deformability and narrow thermal processing window of TiAl alloys limit the development and engineering applications of TiAl alloys. [0003] Existing methods for preparing TiAl alloy plates mainly include ingot metallurgy, powder metallurgy, and foil metallurgy. The ingot metallurgical method realizes the rolling of TiAl alloy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C30/00C22C1/03C22F1/18C22F1/02
CPCC22C1/03C22C14/00C22C30/00C22F1/02C22F1/183
Inventor 韩建超李莎王涛任忠凯贾燚刘志栋锅渺张长江张树志
Owner TAIYUAN UNIV OF TECH
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