Method for producing molybdenum alloy gas vane with powder injection forming

A gas rudder and molybdenum alloy technology, applied in the field of powder metallurgy, can solve the problems of complex processing, high cost and high density, and achieve the effects of short process cycle, low production cost and high yield

Inactive Publication Date: 2008-10-29
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention overcomes the deficiencies of high density of traditional gas rudder materials, complex preparation and processing of gas rudders, and high cost, uses molybdenum pre-alloyed powder as raw material, and adopts powder injection molding technology to prepare high-performance light-weight molybdenum alloy gas rudders

Method used

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  • Method for producing molybdenum alloy gas vane with powder injection forming
  • Method for producing molybdenum alloy gas vane with powder injection forming
  • Method for producing molybdenum alloy gas vane with powder injection forming

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Effect test

example 1

[0018] (1) Molybdenum pre-alloyed powder is prepared according to the mass percentage ratio, taking the total mass of 300g as an example to weigh the mass of each component:

[0019]

[0020] Stearic acid is heated and dissolved in alcohol and put into the ball mill cylinder together with the powder, and filled with N 2 gas, set the ball milling time to 5h, and prepare the pre-alloyed powder. Take out the powder, dry it, and pack it in a bag for later use.

[0021] (2) Weigh the mass of each binder component according to the mass percentage ratio (take 100g binder as an example):

[0022]

[0023] Mix each component on the internal mixer to form a uniform color mixture, which is the binder used;

[0024] (3) Take by weighing 3000g molybdenum pre-alloyed powder and 234g binding agent, powder and binding agent are mixed 2.5h in internal mixer, prepare the feeding material that mixes;

[0025] (4) Inject the feed material on the injection machine to produce the gas rudde...

Embodiment 2

[0031] (1) Molybdenum pre-alloyed powder is prepared according to the mass percentage ratio, taking the total mass of 300g as an example to weigh the mass of each component:

[0032]

[0033] The paraffin wax is heated and dissolved in solvent gasoline and put into a ball mill cylinder together with the powder, and Ar gas is filled into the ball mill cylinder, and the milling time is set at 5 hours to prepare a pre-alloyed powder. Take out the powder, dry it, and pack it in a bag for later use.

[0034] (2) Weigh the mass of each binder component according to the mass percentage ratio (take 100g binder as an example):

[0035]

[0036] Mix each component on the internal mixer to form a uniform color mixture, which is the binder used;

[0037] (3) Take by weighing 3000g molybdenum alloy powder and 258g binding agent according to powder volume loading, powder and binding agent are mixed 1.5h in internal mixer, prepare the feeding material that mixes;

[0038] (4) inject ...

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Abstract

A powder injection molding method is adopted to prepare molybdenum alloy gas vane with a complicated shape. Mechanical alloying is adopted in the invention for high performance ball grinding of Mo powder and one or multiple powders of Ti, Zr, Hf, Re, TiC and ZrC with the mass percent of 0.05-1.5%, and the even molybdenum pre-alloy powder is prepared; the molybdenum pre-alloy powder and an organic binder bond are mixed for preparing even feed, and the feed is injected through an injection machine to form a gas vane injection billet; after the gas vane injection billet is degreased by solvent, degreasing, carbon control and presintering are carried out in a thermal decreasing furnace; finally, high sintering is carried out on the samples after the samples are presintered, and the molybdenum alloy gas vane with high performance is prepared.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a method for preparing a high-performance lightweight molybdenum alloy gas rudder by using powder metallurgy near-net shape technology. Background technique [0002] Molybdenum alloy has high melting point, low thermal expansion coefficient, high wear resistance, high thermal conductivity and high high temperature strength, so it is widely used in high temperature structural parts and aviation fields. The gas rudder is an important part of the engine. It bears a huge airflow impact during operation, so it must have good high temperature strength, thermal shock resistance and ablation resistance. At present, the main materials for preparing gas rudders are W-Mo and W-Cu materials, but their high density (usually higher than 17.0g / cm 3 ) increases the overall mass of the engine, limiting the further improvement of its operating capability. In addition to high temperature strength...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/00B22F1/00B22F3/10
Inventor 范景莲成会朝刘涛田家敏黄伯云
Owner CENT SOUTH UNIV
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