Powder metallurgy method of granule intensified titanium-base compound material

A titanium-based composite material and powder metallurgy technology, which is applied in the powder metallurgy field of powder metallurgy titanium-based composite materials, can solve the problems of hindering sintering densification, limitation, and low production efficiency, and achieve a good combination effect

Inactive Publication Date: 2005-06-01
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high activity of titanium, an oxide film is easily formed on the powder surface, which hinders its sintering and densification, which limits the development and application of powder metallurgy particle-reinforced titanium-based composites.
With the development of technologies such as hot isostatic pressing and powder injection molding, the preparation of fully densified particle-reinforced titanium matrix composites has become possible, but limited by the preparation process and equipment, the production efficiency is low and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0014] Take hydrogenated dehydrogenation titanium powder with an average particle size of 10.4 μm and an oxygen content of 0.34 wt%, aluminum-vanadium alloy powder with an average particle size of less than 44 μm and an oxygen content of 0.43 wt%, and chromium carbide with an average particle size of less than 44 μm and an oxygen content of 0.20 wt%. Powder, the amount of chromium carbide is calculated according to the proportion of carbon accounting for 5Vol% of the total ingredients, and the other ingredients are divided according to the nominal alloy million. After mixing, it is pressed into a powder metallurgy cylindrical standard tensile sample (GB / T7963-1987), 1300 ℃ The 1# sample obtained by sintering.

example 2

[0016] Take hydrogenated dehydrogenation titanium powder with an average particle size of 10.4 μm and an oxygen content of 0.34 wt%, aluminum-vanadium alloy powder with an average particle size of less than 44 μm and an oxygen content of 0.43 wt%, and chromium carbide with an average particle size of less than 44 μm and an oxygen content of 0.20 wt%. Powder, mixed with chromium carbide according to the proportion of carbon accounting for 5Vol% of the total ingredients, and other ingredients according to the ingredients of Chengyi alloy, pressed into powder metallurgy cylindrical standard tensile specimens (GB / T7963-1987) by isostatic pressing, sintered at 1200 ° C The obtained 2# sample.

example 3

[0018] Take hydrogenated dehydrogenation titanium powder with an average particle size of 10.4 μm and an oxygen content of 0.34 wt%, aluminum-vanadium alloy powder with an average particle size of less than 44 μm and an oxygen content of 0.43 wt%, and chromium carbide with an average particle size of less than 44 μm and an oxygen content of 0.20 wt%. Powder, and neodymium aluminum alloy powder with an average particle size of less than 44μm and an oxygen content of 0.51wt%, chromium carbide is added according to the proportion of carbon accounting for 5Vol% of the total batching amount, other ingredients are batched according to the nominal alloy composition, mixed and pressed into powder by isostatic pressing Metallurgical cylindrical standard tensile sample (GB / T7963-1987), 3# sample obtained by sintering at 1300°C.

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Abstract

The powder metallurgical process for preparing Ti-base composite material with reinforcing granular phase features the addition of chromium carbide during preparing Ti alloy, with the C content being 5-15 vol%. Through mixing material, cold isostatic pressing formation, and vacuum sintering at 1200-1300 deg.c for 1-6 hr, the Ti alloy with reinforcing granular TiC phase is prepared. During the sintering, Ti and chromium carbide produce in-situ composing reaction to produce the reinforcing granular TiC phase. The emergence of the second granular phase fines the alloy crystal grains, blocks the expansion of cracks in the alloy and raises the performance of the alloy.

Description

technical field [0001] The invention relates to a powder metallurgy method of a particle-reinforced titanium-based composite material, relating to a powder metallurgy method, in particular to a powder metallurgy method of a powder-metallurgical titanium-based composite material containing a particle-reinforced phase. Background technique [0002] Due to its high specific strength, specific modulus and high wear resistance, particle-reinforced titanium-based composite materials have successfully trial-produced valves, connecting rods, golf ball head plates, and skis for automobile engines. However, due to the high strength and high deformation resistance of the composite material, its processing becomes difficult, which limits the application of particle-reinforced titanium-based composite materials. [0003] Powder metallurgy is a near-net shape technology, which avoids the problems of structure, composition segregation and coarse grains in the production process of melting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/00
Inventor 汤慧萍刘海彦黄原平刘咏陈丽芳
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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