Method for preparation of Yt-containing TiAl intermetallic compound plate material

A technology of intermetallic compounds and elements, applied in the direction of metal rolling, metal rolling, metal processing equipment, etc., can solve the problems of difficult deformation, deformation heat processing, difficult to obtain size, etc., to achieve good surface quality and uniform deformation , Improve the effect of rolling deformation ability

Inactive Publication Date: 2007-08-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because TiAl intermetallic compounds are relatively brittle and are difficult to deform, it is difficult to deform and heat-process, and the total deformation of rolling is difficult to exceed 70%. It is not easy to obtain plates with large sizes and no defects such a

Method used

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  • Method for preparation of Yt-containing TiAl intermetallic compound plate material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0012] Specific embodiment 1: This embodiment is described with reference to FIG. 1. The steps of the preparation method of this embodiment are as follows:

[0013] Step 1. A TiAl intermetallic compound ingot containing 0.01 to 0.6 at.% yttrium is obtained by melting and casting the yttrium content of 0.01 to 0.6 at.%, the aluminum content of 35 to 55 at.%, and the titanium content of 44.9 to 64.4 at.% Ingots and ingots need to be annealed for 10 to 80 hours at 800°C to 1200°C, and hot isostatic pressing for 3.5 to 4.5 hours at 1200 to 1280°C and 150 to 250 MPa, and then removed from the ingot A square blank is cut from the top; or a square blank cut from a TiAl intermetallic compound material containing 0.01 to 0.6 at.% of yttrium obtained by thermal processing such as heat treatment, forging or extrusion;

[0014] Step 2. Select stainless steel, pure titanium or titanium alloy as the covering material to make the covering. The thickness of one side of the covering is 2mm~30mm. T...

Example Embodiment

[0019] Embodiment 2: The difference between this embodiment and the first embodiment is that the TiAl intermetallic compound in step one also contains Nb, Cr, Mn, V, Ni, W, Hf, Ta, Mo, Zr, Si, One or more of Y, La, Ce, C, B and other elements, but the total content of the added elements is less than 20at.%.

Example Embodiment

[0020] Specific embodiment three: This embodiment is different from the specific embodiment one in that the Ti-47Al-2Nb-2Mn-0.2Yat.% alloy ingot obtained by the melting and casting process of step one has a thickness of 10mm and is at 800°C. , Carry out annealing treatment with heat preservation for 48 hours, carry out hot isostatic pressing for 4 hours under the conditions of 1250℃ and 170MPa, and then cut into square blanks; step three, wrap the square blanks in a 304 stainless steel sheath, and the thickness of the sheath Step 4: Put it into a heat treatment furnace and heat it to 1050℃ and keep it for 30 minutes, then put it on a Φ500×846mm two-roll reversible hot rolling mill, the rolling pressure is 400T, and the rolling speed is 0.5m / s. The deformation of the pass is 10%, and it is rolled back to the furnace for 15 minutes between passes. After rolling, it is returned to the furnace, cooled to 600°C with the furnace, and then air-cooled to room temperature. After machining ...

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Abstract

The invention discloses a making method of TiAl metal compound board with yttrium, which comprises the following steps: 1. fusing TiAl metal block with 0.01-0.6at.% yttrium; 2. making jacket through stainless steel or titanium alloy; 3. placing block in the jacket after heating; 4. placing TiAl metal compound block in the heating furnace to 950-1320 deg.c; rolling; cooling to indoor temperature; 5. removing jacket; obtaining the product.

Description

technical field [0001] The invention relates to a preparation method of a TiAl intermetallic compound plate. Background technique [0002] With the rapid development of aviation, aerospace technology and the automobile industry, the flight distance and flight speed of various new aircrafts have increased, and higher and higher requirements have been put forward for lightweight, high-strength, heat-resistant materials and their precision forming technology. Because TiAl intermetallic compound has many outstanding features, such as: low density, high specific strength and specific elastic modulus, it can still maintain high enough strength and stiffness at high temperature, and it also has good creep resistance and anti-corrosion properties. Oxidation ability, etc., which makes it a very competitive material for heat-resistant structural profiles such as aerospace, aviation and automotive engines. Plate preparation technology is one of the important research directions of TiA...

Claims

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Application Information

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IPC IPC(8): B21B3/00B21B1/38B21B37/74B21B37/48B21B37/46B21B37/00C21D9/70C21D11/00C21D1/00C22C14/00C22C21/00
Inventor 陈玉勇孔凡涛
Owner HARBIN INST OF TECH
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