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Preparation method of TiAl base alloy plate

A technology of base alloy and plate, applied in the field of alloy plate preparation, can solve problems such as long production cycle, and achieve the effect of fast reaction time, dense material and favorable for industrialization

Inactive Publication Date: 2013-11-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problem of the long production cycle of the existing method for preparing TiAl-based alloy plates, and provides a preparation method for TiAl-based alloy plates

Method used

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  • Preparation method of TiAl base alloy plate
  • Preparation method of TiAl base alloy plate
  • Preparation method of TiAl base alloy plate

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Experimental program
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Effect test

specific Embodiment approach 1

[0014] Specific embodiment one: the preparation method of a kind of TiAl-based alloy plate of the present embodiment is carried out according to the following steps:

[0015] 1. After surface treatment, Ti foil and Al foil are stacked alternately, wrapped with Ti foil, and then placed in a graphite mold, and then the graphite mold is placed in a vacuum hot-pressing sintering furnace;

[0016] 2. Vacuumize the vacuum hot pressing sintering furnace to 1×10 -3 Pa~9×10 -3 Pa, then heat up, when the temperature rises to 400-600°C, apply a pressure of 10-30MPa to press for 0.5-1h; then remove the pressure to 0MPa, continue to heat up to 900-1300°C and keep it for 2-6h; The temperature is maintained at 30-50 MPa at 30-50 MPa for 0.5-1 hour, and the TiAl-based alloy plate is obtained after cooling in the furnace.

specific Embodiment approach 2

[0017] Embodiment 2: This embodiment differs from Embodiment 1 in that the thickness of the Ti foil in step 1 is 50-200 μm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0018] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that the thickness of the Al foil in Step 1 is 50-200 μm. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a TiAl base alloy plate, relates to a preparation method of an alloy plate, and aims to solve the technical problem of long production period existing in the conventional method for preparing the TiAl base alloy plate. The method comprises the following steps of: 1, performing surface treatment on Ti foils and Al foils and then alternately laminating, wrapping with the Ti foil, placing in a graphite mould and placing the graphite mould in a vacuum hot pressing sintering furnace; and 2, after vacuuming the vacuum hot pressing sintering furnace, heating to 400-600 DEG C and applying pressure of 10-30 MPa to press for 0.5-1 hour, decompressing to 0 MPa, continuously heating to 900-1,300 DEG C and keeping for 2-6 hours, and finally keeping for 0.5-1 hour under the conditions of 900-1,300 DEG C and pressure of 30-50 MPa and cooling to obtain the TiAl base alloy plate. According to the method, the Ti foils and the Al foils are subjected to solid-liquid reaction, so that the preparation period is shortened. The method is used for preparing the alloy plate.

Description

technical field [0001] The invention relates to a method for preparing alloy plates. Background technique [0002] TiAl-based alloy is a new type of lightweight heat-resistant structural material, with a specific gravity less than 50% of that of nickel-based alloys. It has the advantages of light weight, high strength, corrosion resistance, wear resistance, and high temperature resistance, and has excellent room temperature and high temperature performance. It has become a key material in the research and application of aviation, aerospace and military fields around the world. After decades of hard work, TiAl-based alloys have entered the stage of practical development. Among them, the demand for TiAl-based alloy plates is the most urgent. In addition to being directly used as structural materials in a large number of aerospace and military fields, TiAl-based alloy sheets can also be used as preformed materials for superplastic forming, to prepare parts for aviation and ae...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/38B21B47/00C22F1/00C22F1/04C22F1/18C22F1/02
Inventor 耿林逄锦程范国华李爱滨郑镇洙王桂松吴昊
Owner HARBIN INST OF TECH