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Sheathing and extruding preparation method for titanium aluminum alloy rods

A titanium-aluminum alloy and sheathing technology, which is applied in the field of alloy materials and its preparation, can solve problems such as cracking, achieve the effects of preventing cracks, suppressing cracks, and simple preparation methods

Active Publication Date: 2019-03-01
XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problem of cracking during the thermal processing of the existing titanium-aluminum alloy, the purpose of the present invention is to provide a method for preparing a titanium-aluminum alloy bar sheathed extrusion, which is convenient and economical for thermal processing of the titanium-aluminum alloy ingot

Method used

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  • Sheathing and extruding preparation method for titanium aluminum alloy rods
  • Sheathing and extruding preparation method for titanium aluminum alloy rods
  • Sheathing and extruding preparation method for titanium aluminum alloy rods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Taking the preparation of Ti48Al2Cr2Nb alloy rods as an example, the preparation steps are as follows:

[0042] Step 1: Prepare Ti48Al2Cr2Nb alloy ingots by vacuum consumable arc melting method. The first two meltings are smelted by conventional methods, and the cooling water temperature is controlled at 45°C for the third smelting, and the cooling time is 1h. To room temperature, the prepared Ti48Al2Cr2Nb alloy ingot size is Φ210mm.

[0043] Step 2: Cut off the head and tail of the ingot prepared in step 1 by 100mm and peel it to Φ200mm. The surface roughness of the ingot is ≤1.6μm. Cut a length of 250mm from the ingot as an extrusion billet, see figure 1 .

[0044] Step 3: Make the bag, see figure 2 , package sleeve body 3 specifications: outer diameter the inside diameter of Height 251mm; top cover 1 specification: thickness 70mm, diameter of the upper end of the vertebral body 125mm, taper 120 degrees, diameter of the lower end 250mm, center opening Hole; ...

Embodiment 2

[0050] Taking the preparation of Ti47Al2Cr2Nb alloy rods as an example, the preparation steps are as follows:

[0051] Step 1: Prepare Ti47Al2Cr2Nb alloy ingots by vacuum consumable arc melting method. The first two meltings are smelted by conventional methods. The cooling water temperature is controlled at 45°C for the third smelting, and the cooling time is 1h. To room temperature, the prepared Ti47Al2Cr2Nb alloy ingot size is Φ120mm.

[0052] Step 2: Cut off the head and tail of the ingot prepared in step 1 by 100mm and peel off the skin to Φ110mm. The surface roughness of the ingot is ≤1.6μm. Check the low-magnification structure of the head and tail. A length of 250 mm was cut from the ingot as an extrusion billet.

[0053] Step 3: Make the bag, cylinder specification: outer diameter the inside diameter of Height 251mm; top cover specifications: thickness 70mm, diameter of the upper end of the vertebral body 85mm, taper 120 degrees, diameter of the lower end 150mm, c...

Embodiment 3

[0059] Taking the preparation of Ti47.5Al2.5V1Cr alloy rods as an example, the preparation steps are as follows:

[0060] Step 1: Prepare Ti47.5Al2.5V1Cr alloy ingots by vacuum consumable arc melting. The first two smeltings are smelted by conventional methods. During the third smelting, the cooling water temperature is controlled at 40°C, and the cooling time is 1h. Wrap it with insulation cotton and cool it to room temperature, and the specification of the prepared Ti47.5Al2.5V1Cr alloy ingot is Φ160mm.

[0061] Step 2: Cut off the head and tail of the ingot prepared in step 1 by 100mm and peel off the skin to Φ150mm. The surface roughness of the ingot is ≤1.6μm. Check the low-magnification structure of the head and tail end surfaces. A length of 250 mm was cut from the ingot as an extrusion billet.

[0062] Step 3: Make the bag, cylinder specification: outer diameter the inside diameter of Height 251mm; top cover specifications: thickness 70mm, diameter of the upper en...

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Abstract

Disclosed is a sheathing and extruding preparation method for titanium aluminum alloy rods. The method comprises the steps that the head and tail of a titanium aluminum alloy cast ingot are cut off, then the surface and the head and tail end faces of the cast ingot are polished on a lathe, and the titanium aluminum alloy cast ingot is wrapped with high silicon oxide cloth and then put into a sheath to obtain a sheathing and extruding billet; after the sheathing and extruding billet is heated, the billet is put into a glass protective lubricant for even adhesion, extruding and cooling are conducted, and the titanium aluminum alloy rods are obtained after the sheath is removed. Due to the high heating temperature, an extruding lubricating material is difficult to withstand the high temperature, rolling application of the lubricating material glass protective lubricant is conducted after heating is completed, and the lubricating effect in the extruding process is ensured; in addition, thesheathing material is also cooled, so that the deformation resistance of the sheathing material and titanium aluminum alloy is kept consistent, and it is ensured that the subsequent extruding processis smoothly carried out. The titanium aluminum alloy cast ingot is wrapped in the middle of the sheathing material, the cast ingot and the sheathing material are both under the compressive stress inthe extruding deformation process, the plasticity of the material can be fully exerted in the stress state, and the generation of cracks is inhibited.

Description

technical field [0001] The invention belongs to the technical field of alloy materials and their preparation, and in particular relates to a method for preparing a titanium-aluminum alloy rod sheathed and extruded. Background technique [0002] Titanium-aluminum alloy is an intermetallic compound. Due to the long-range ordered arrangement of its atoms and the coexistence of interatomic metal bonds and covalent bonds, it may have both the plasticity of metals and the high-temperature strength of ceramics. The elastic modulus and creep resistance of titanium-aluminum alloys are comparable to those of nickel-based superalloys currently used in aerospace engines, while the density of titanium-aluminum alloys is only half or even lower than that of nickel-based superalloys, and its service temperature is expected to up to 900°C. Titanium-aluminum alloy is the best candidate material at 650°C to 1000°C, and is expected to be used in engineering applications in the manufacture of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18
CPCC22F1/183
Inventor 薛祥义焦勇周中波张利军白钰
Owner XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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