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TiAl alloy plate rolling method and device

An alloy plate and alloy technology, applied in metal rolling, driving devices for metal rolling mills, metal rolling, etc., can solve the problems of TiAl plate bending and fracture, unfavorable rolling of large-size plates, etc., and achieve rolling passes Less, good industrial application potential, quality improvement effect

Active Publication Date: 2022-08-05
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention provides a TiAl alloy sheet rolling method and device, which solves the problems in the center caused by warpage in the prior art Bending fracture of TiAl sheet is not conducive to the rolling of large-size sheets

Method used

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  • TiAl alloy plate rolling method and device
  • TiAl alloy plate rolling method and device
  • TiAl alloy plate rolling method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The rolling process of TiAl alloy plate is as follows:

[0049] 1. The thickness of the upper and lower stainless steel lining plates is 20mm, and the thickness of the TiAl alloy slab is 10mm, and two 304 stainless steel lining plates are placed on the upper and lower surfaces of the TiAl alloy respectively; the TiAl alloy slab is directly from the TiAl alloy ingot. It is made by cutting TiAl alloy slabs of different thicknesses.

[0050] 2. Put the TiAl alloy and the liner into the heating box for heating at the same time; after the temperature is raised to 1200°C, keep the temperature for 120min;

[0051] 3. Push the liner and TiAl alloy to the entrance of the rolling device (the position between the roll and the fixed roll) at the same time; perform single-pass rolling with a deformation of 60% and a rolling speed of 140 mm / s;

[0052] 4. The rolled TiAl alloy sheet is kept at a temperature of 900° C. for 7 hours, and then cooled to room temperature with the furnace...

Embodiment 2

[0055] The rolling process of TiAl alloy plate is as follows:

[0056] 1. The thickness of the upper and lower stainless steel lining plates is 10mm, the thickness of the TiAl alloy slab is 20mm, and two 304 stainless steel lining plates are placed on the upper and lower surfaces of the TiAl alloy respectively;

[0057] 2. Put the TiAl alloy and the liner into the heating box for heating at the same time; after the temperature is raised to 1250 ℃, let it stand for 90 minutes;

[0058] 3. Push the liner and billet to the entrance of the roll at the same time; carry out single-pass rolling with a deformation of 70%, and a rolling speed of 90mm / s;

[0059] 4. The rolled TiAl alloy sheet is kept for 6 hours at a temperature of 950°C, and then cooled to room temperature with the furnace.

[0060] A picture of the final rolled TiAl alloy sheet as Figure 7 , the SEM-BSE image of its cross-section is shown in Figure 10 shown.

Embodiment 3

[0062] 1. The thickness of the upper and lower stainless steel linings is 20mm, and the thickness of the TiAl alloy slab is 20mm, and two 304 stainless steel linings are placed on the upper and lower surfaces of the TiAl alloy respectively;

[0063] 2. Put the TiAl alloy and the lining plate into the heating box for heating at the same time; after the temperature is raised to 1300 ℃, let stand for 50 minutes;

[0064] 3. Push the liner and billet to the entrance of the roll at the same time; carry out single-pass rolling with a deformation of 80% and a rolling speed of 40mm / s;

[0065] 4. The rolled TiAl alloy sheet is kept at a temperature of 1100° C. for 4 hours, and then cooled to room temperature with the furnace.

[0066] A picture of the final rolled TiAl alloy sheet as Figure 8 , the SEM-BSE image of its cross-section is shown in Figure 11 shown.

[0067] TiAl alloy sheets rolled according to Examples 1-3 and Figures 9 to 11 It can be seen from the SEM image that...

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Abstract

The invention relates to the technical field of TiAl alloy, in particular to a TiAl alloy plate rolling method and device. According to the specific technical scheme, the TiAl alloy plate rolling method comprises the steps that the upper surface and the lower surface of a TiAl alloy plate blank are covered with stainless steel lining plates, and after heat preservation is conducted, rolling is completed in a rolling device. The problem that in the prior art, due to warping, a TiAl plate located at the center is bent and broken, and rolling of a large-size plate is not facilitated is solved.

Description

technical field [0001] The invention relates to the technical field of TiAl alloys, in particular to a method and device for rolling a TiAl alloy sheet. Background technique [0002] As a new lightweight high-temperature structural material, TiAl intermetallic compounds have high melting point, high strength, high elastic modulus, low diffusion coefficient, excellent oxidation resistance and creep resistance, and the alloy density is about that of Ni-based superalloys. Half of it is expected to replace Ni-based superalloys, and the operating temperature is 600-900 °C, which is higher than that of Ti alloys. However, TiAl alloys have poor room temperature plasticity, narrow hot working window, and poor high temperature deformation ability, which seriously limit the practical engineering application of TiAl alloys, especially the preparation of TiAl alloy sheets. TiAl alloy sheets are mostly prepared by the ingot metallurgical process of wrapping rolling. The wrapping rollin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B47/00B21B13/02B21B35/10
CPCB21B1/38B21B47/00B21B13/02B21B35/10B21B2001/386B21B2201/06B21B2013/021B21B2261/20
Inventor 张树志任锐畅吴春芬赵光旭张长江韩建超
Owner YANSHAN UNIV
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