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Titanium alloy rotor near-net manufacturing method

A manufacturing method, titanium alloy technology, applied in the field of powder metallurgy, to achieve the effect of high surface quality, simple process and high yield

Active Publication Date: 2011-01-26
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few public reports on the preparation of rotors for launch vehicles by powder metallurgy titanium alloy technology at home and abroad.

Method used

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  • Titanium alloy rotor near-net manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The steps of the near-net-shape manufacturing method of the titanium alloy rotor described in the present invention are as follows:

[0023] (a) Machining mandrel and sheath: using low-carbon steel, machining mandrel 3 and sheath 1 according to the titanium alloy rotor flow cavity to be prepared; considering the subsequent shrinkage and densification of titanium alloy powder, There must be a certain margin in the inner diameter and height.

[0024] (b) Preparation of titanium alloy spherical powder: use plasma rotating electrode to prepare titanium alloy spherical powder, wherein the diameter of the titanium electrode is Φ40mm, the rotation speed is 18000rpm, atomize to form titanium alloy spherical powder, sieve and collect the titanium alloy spherical powder with a particle size of 45-150 μm ;

[0025] (c) Assembling the mandrel and filling powder, degassing: such as figure 1 As shown, the mandrel 3 is assembled into the sheath 1, and after being fixed, the titanium...

Embodiment 2

[0029] The steps of the near-net-shape manufacturing method of the titanium alloy rotor described in the present invention are as follows:

[0030] (a) Machining mandrel and sheath: using low carbon steel, machining mandrel 3 and sheath 1 according to the titanium alloy rotor flow channel to be prepared; considering the subsequent shrinkage and densification of titanium alloy powder, the inner diameter of sheath and height to leave a certain margin.

[0031] (b) Prepare titanium alloy spherical powder: prepare titanium alloy spherical powder by using a plasma rotating electrode, wherein the diameter of the titanium electrode is Φ60mm, the rotation speed is 13000rpm, atomize to form titanium alloy spherical powder, and sieve and collect titanium alloy spherical powder with a particle size of 45-150 μm ;

[0032] (c) Assembling the mandrel and filling powder, degassing: such as figure 1 As shown, the mandrel 3 is assembled into the sheath 1, and after being fixed, the titanium...

Embodiment 3

[0036] The steps of the near-net-shape manufacturing method of the titanium alloy rotor described in the present invention are as follows:

[0037] (a) Machining mandrel and sheath: using low carbon steel, machining mandrel 3 and sheath 1 according to the titanium alloy rotor flow channel to be prepared; considering the subsequent shrinkage and densification of titanium alloy powder, the inner diameter of sheath and height to leave a certain margin.

[0038] (b) Prepare titanium alloy spherical powder: prepare titanium alloy spherical powder by using plasma rotating electrode, wherein the diameter of the titanium electrode is Φ50mm, the rotation speed is 15000rpm, atomize to form titanium alloy spherical powder, sieve and collect titanium alloy spherical powder with a particle size of 45-150 μm ;

[0039] (c) Assembling the mandrel and filling powder, degassing: such as figure 1 As shown, the mandrel 3 is assembled into the sheath 1, and after being fixed, the titanium alloy...

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Abstract

The invention provides a titanium alloy rotor near-net manufacturing method, which comprises the following steps of: (a) machining a core mould and a sheath; (b) preparing spherical titanium alloy powder; (c) assembling the core mould, filling the powder and performing deaeration; (d) performing hot isostatic pressing processing; and (e) removing the sheath and performing chemical milling and de-molding. In the method, a plasma rotating electrode is adopted to prepare the low-temperature spherical titanium alloy powder, the core mould and the sheath are made from a metal material, hot isostatic pressing process parameters are optimized, the sheath is mechanically removed, and the core mould is chemically milled and removed so as to manufacture the high-performance titanium alloy rotor with a complex, thin-walled and semienclosed structure. The titanium alloy rotor manufactured by the method has the characteristics of high material performance reaching the performance level of a forged piece, high yield, high net-formed blade size accuracy, high surface quality, and isotropy.

Description

technical field [0001] The invention relates to the field of powder metallurgy, and relates to a near-clean manufacturing method of a titanium alloy rotor, in particular to a manufacturing method of a complex and thin-walled titanium alloy rotor structural member applicable to a new generation of large carrier liquid rocket hydrogen-oxygen engine. Background technique [0002] The titanium alloy rotor is used in the high-performance engine of the new generation of launch vehicles in my country's aerospace industry. It is one of the important high-speed rotating parts. Only by ensuring that the strength of the titanium alloy rotor still has a large margin at the highest speed can the use of the engine be satisfied. Require. [0003] Titanium alloy rotors have the characteristics of very complex shapes, harsh industrial and mining conditions, and extremely high requirements on material performance and product reliability. The titanium alloy rotor is prepared by precision casti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/04
Inventor 吕宏军李圣刚王琪
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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