Sheathed open blank forging and shaping technique of titanium-aluminum alloy cast ingot

A blank forging and titanium-aluminum alloy technology, which is applied in the field of sheathed blank forging forging of titanium-aluminum alloy ingots, can solve problems such as mismatching, suppress deformation and cracking, improve deformation plasticity, and solve high-temperature deformation and forging The effect of blank mismatch

Inactive Publication Date: 2018-06-05
XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the conventional heat-resistant stainless steel sheath encounters high-temperature deformation and does not match the forging billet, and provides a forging molding process for the sheath opening of the titanium-aluminum alloy ingot. The titanium alloy material with high temperature deformation and good plasticity is used as the sheath material for the titanium-aluminum alloy ingot forging, so that the titanium alloy sheath and the covered titanium-aluminum alloy ingot are in close contact during the entire forging process. Together, the titanium alloy sheath not only prevents the heat dissipation of the internal titanium-aluminum billet, but also as the forging and upsetting proceeds, the titanium alloy sheath exerts more and more binding force on the wrapped titanium-aluminum forging billet (ie, compression Stress), this compressive stress can significantly improve the deformation plasticity of titanium-aluminum alloy ingots, and can significantly inhibit the deformation and cracking of titanium-aluminum alloys

Method used

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  • Sheathed open blank forging and shaping technique of titanium-aluminum alloy cast ingot
  • Sheathed open blank forging and shaping technique of titanium-aluminum alloy cast ingot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: Diameter titanium-aluminum alloy ingots are opened and forged, and the process diagram is shown in figure 2 . see figure 2(a), make material preparation first, see figure 2 (b), welding the lower cover, see figure 2 (c), the titanium-aluminum ingot is loaded into the sleeve body, see figure 2 (d), welding the upper cover, see figure 2 (e), heat forging is upsetting, see 2(f), complete forging, specifically including the following steps:

[0041] 1) Titanium-aluminum ingot preparation: unilaterally turning the outer surface of the titanium-aluminum ingot to remove 3mm of smelting skin, cutting off the riser of the ingot, cutting or turning the bottom surface of the ingot, and chamfering not less than R10, for There are no defects that have been removed by car cleaning. Careful grinding is required to remove them. The width / depth of the grinding must be greater than 8 / 1, and the transition should be smooth. The surface roughness of the ingot is 3.2...

Embodiment 2

[0052] Example 2: Diameter titanium-aluminum alloy ingots are opened and forged.

[0053] 1) Titanium-aluminum ingot preparation: unilaterally turn the outer surface of the titanium-aluminum ingot to remove 3mm of smelting skin, cut off the riser of the ingot, cut or remove the bottom surface of the ingot, and chamfer R12. In addition to clean defects, careful grinding is required to remove them. The width / depth of grinding must be greater than 8 / 1, and the transition should be smooth. The surface roughness of the ingot must not exceed 3.2 μm.

[0054] Specifications of titanium aluminum ingot: diameter is 160mm and height is 350mm.

[0055] 2) Preparation of sheath material: The sheath is composed of three parts: the upper cover plate 1, the lower cover plate 4, and the middle cylinder body 3, all of which are processed by turning TA15 titanium alloy forgings, and the surface roughness shall not be greater than 6.3 μm.

[0056] Upper and lower cover plate specifications:...

Embodiment 3

[0064] Example 3: Diameter titanium-aluminum alloy ingots are opened and forged.

[0065] 1) Titanium-aluminum ingot preparation: unilaterally turn the outer surface of the titanium-aluminum ingot to remove the smelting skin of 4 mm, cut off the riser of the ingot, cut off or remove the bottom surface of the ingot, and chamfer R12, for parts without Defects removed by the car must be carefully polished to remove them. The width / depth of the grinding must be greater than 8 / 1, and the transition should be smooth. The surface roughness of the ingot is 3.2μm.

[0066] Specifications of titanium aluminum ingot: diameter is 200mm and height is 420mm.

[0067] 2) Preparation of sheath material: The sheath is composed of three parts: the upper cover plate, the lower cover plate and the middle cylinder, all of which are processed by turning TC11 titanium alloy forgings with a surface roughness of 6.3 μm.

[0068] Upper and lower cover specifications: diameter It is 200mm and the...

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Abstract

The invention discloses a sheathed open blank forging and shaping technique of a titanium-aluminum alloy cast ingot. A sheath is composed of an upper cover plate, a middle drum body and a lower coverplate; the surface roughness of the upper cover plate, the lower cover plate and the middle drum is not more than 6.0 mu m; the lower cover plate and the bottom part of the middle drum are welded to be a whole body; the titanium-aluminum alloy cast ingot is filled in the inner cavity of the drum body welded with the lower cover plate; the upper cover plate and the top part of the drum body are welded to be a whole body; after heating and rough forging of a pier, the stress relief annealing is performed. The titanium-aluminum alloy sheath and the sheathed titanium-aluminum alloy cast ingot aretightly bonded during the whole open blank forging process, thus the radiation of the internal titanium-aluminum blank is prevented; along with the forging and upsetting, the titanium-aluminum alloy sheath generates bigger restriction force (or pressing stress) to the sheathed titanium-aluminum forging blank; the pressing stress can significantly improve the deforming plasticity of the titanium-aluminum alloy cast ingot, and obviously inhibit the deformation crack of the titanium-aluminum.

Description

technical field [0001] The invention belongs to the technical field of hot-working plastic forming of difficult-to-deform non-ferrous metal materials, and relates to a sheathing blank forging forming process of a titanium-aluminum alloy ingot. Background technique [0002] Titanium aluminum is an intermetallic compound. Due to the long-range orderly 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 薛祥义张利军焦勇刘小花刘娣周中波
Owner XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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