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Powder hot isostatic pressing (HIP) forming method for titanium (Ti) alloy blisk

An integral blade and hot isostatic pressing technology, which is applied in the field of aerospace manufacturing, can solve the problems of integral blade disks that cannot be molded with complex surface structure blades, and achieve excellent mechanical properties, uniform performance, and improved molding efficiency.

Inactive Publication Date: 2011-07-20
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

However, this hot isostatic pressing technology is unable to form integral blade disks with blades with complex profile structures.

Method used

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  • Powder hot isostatic pressing (HIP) forming method for titanium (Ti) alloy blisk
  • Powder hot isostatic pressing (HIP) forming method for titanium (Ti) alloy blisk
  • Powder hot isostatic pressing (HIP) forming method for titanium (Ti) alloy blisk

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Embodiment Construction

[0025] The powder hot isostatic pressing forming method of the titanium alloy integral blade disk provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Such as Figure 1-Figure 5 As shown, the powder hot isostatic pressing method of the titanium alloy integral blade disc provided by the present invention comprises the following steps carried out in order:

[0027] 1) According to the shape of the whole blade disc 11, such as figure 1 As shown in the mold 1, the mold 1 is composed of a plurality of blade modules 2 arranged in the middle in a ring shape at a distance from each other and a ring 3 connected to the outer ends of the plurality of blade modules 2. At the same time, the outer edge of one side of the ring 3 faces A wedge-shaped protrusion 4 is formed on the outside, and the cavity part in the middle of the mold 1 is in the shape of an integral blisk 11; in addition, the mold 1...

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Abstract

The invention provides a powder hot isostatic pressing (HIP) forming method for a titanium (Ti) alloy blisk. The method comprises the following steps: preparing a die, a sheath and spherical Ti-alloy powder; putting the die and the powder into the sheath; vacuumizing the sheath; performing HIP treatment on the vacuumized sheath; mechanically removing the sheath and part of the die; and etching off the rest die by utilizing strong acid. The powder HIP forming method of the Ti-alloy blisk has the beneficial effects that the Ti-alloy powder is solidified, formed and densified by utilizing a HIP technology; meanwhile complex blade surfaces on the blisk are formed under the restriction of the die, and positions which are in a simple shape and is easily machined on the blisk are freely formed by the sheath, thus achieving the purpose of forming a complex surface part at one time by using the die, and improving forming efficiency of the part and utilization rate of a Ti-alloy material; and the obtained part has the advantages of uniform performances, excellent mechanical properties and high compactness up to over 99%.

Description

technical field [0001] The invention belongs to the technical field of aerospace manufacturing, and in particular relates to a powder hot isostatic pressing forming method of a titanium alloy integral blade disc. Background technique [0002] The integral blade disc is a new structure that appeared in the mid-1980s. It integrates the disc located in the middle and a plurality of blades connected to the outer circumference of the disc at a distance from one end, eliminating the need for tenons for connection. , Tenon and groove, which can greatly simplify the structure. In addition, because the integral blade disc has the characteristics of simplified structure, few parts, high efficiency, and strong reliability, it has been rapidly popularized and applied in fighter jets in the 1990s, and has been used in large civilian engines at the beginning of this century. [0003] At present, there are many methods for processing the overall blade disc, such as precision casting, forg...

Claims

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Application Information

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IPC IPC(8): B22F3/04B22F5/08
Inventor 郎利辉布国亮
Owner BEIHANG UNIV
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