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A kind of titanium matrix composite material and preparation method thereof

A technology for titanium-based composite materials and titanium alloys, which is applied in the field of preparation technology combining powder metallurgy and vacuum consumable electrode melting, can solve the problem of irregular particle shape, increased melting temperature of titanium-based composite materials, and localization of master alloy ingots. Reinforcement segregation and other problems, to achieve uniform and stable material composition, reduce the difficulty of smelting, and reduce costs

Active Publication Date: 2021-10-01
SHENYANG RES INST OF FOUNDRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Hydraulic technology is used to mix materials to prepare titanium-based composite materials. In this way, the size of sponge titanium particles is large (generally greater than 1mm) and the shape of particles is irregular. It is difficult to mix uniformly during the mixing process, resulting in the preparation of master alloy ingots. Reinforcement segregation is serious, resulting in difficulty in melting, and multiple remelting is required to solve the segregation of components
At the same time, when ceramic phase reinforcement is added to titanium alloy, as the volume fraction of the reinforcement phase increases, the melting temperature of the titanium-based composite material will increase significantly, resulting in a significant increase in the difficulty of smelting, resulting in the inability to smelt or the need for multiple remelting, which will lead to cost reduction. Increase and extension of duration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] TC 4 The powder raw material composition is as shown in Table 1:

[0029] Table 1

[0030] element Ti Al V Fe C N H O content margin 6.28 4.14 0.08 0.03 0.0023 0.0039 0.090

[0031] Among them, B 4 The purity of C powder is 99.8%.

[0032] 1) Vacuum mixing: the total mass is 10kg TC 4 Powder (80μm~150μm) and B 4 C powder (125~150μm) is mixed evenly according to the proportion and put into the mixing tank, among which, B 4 The addition of C powder is 2.5% of the total weight, and the mixing tank is vacuumed by molecular pump, and the vacuum degree is controlled at 1×10 -2 Pa, then the tank mill mixed materials for 30min at a speed of 60r / min;

[0033] 2) Powder filling: use a vibrating table to pour the mixed powder into the metal sheath;

[0034] 3) Package welding and sealing: Use a molecular pump to pump the vacuum of the package filled with powder to 1×10 -2 Pa, using tungsten argon arc welding machine to seal and weld th...

Embodiment 2

[0042] TC 4 The powder raw material composition is as shown in Table 2:

[0043] Table 2

[0044] element Ti Al V Fe C N H O content margin 6.24 4.20 0.08 0.02 0.0020 0.0030 0.080

[0045] B 4 C powder purity is 99.8%

[0046] 1) Vacuum mixing: TC with a total mass of 10kg 4 Powder and B 4 C powder is mixed evenly according to the proportion, where B 4 The amount of C powder added is 3.8% of the total weight, put it into the mixing tank, and use a molecular pump to vacuumize the mixing tank, and the vacuum degree is controlled at 0.5×10 -2 Below Pa, after that, the tank mill is mixed for 40 minutes at a speed of 80r / min;

[0047] 2) Powder filling: use a vibrating table to pour the mixed powder into the metal sheath;

[0048] 3) Package welding and sealing: Use a molecular pump to pump the vacuum of the package filled with powder to 1×10 -3 Pa, using an argon arc welding machine to seal and weld the sheath;

[0049] 4) Leak detect...

Embodiment 3

[0056] TC 4 The powder raw material composition is as shown in Table 3:

[0057] table 3

[0058] element Ti Al V Fe C N H O content margin 6.80 4.50 0.08 0.03 0.0020 0.0030 0.080

[0059] B 4 C powder purity is 99.8%

[0060] 1) Vacuum mixing: TC with a total mass of 10kg 4 Powder and B 4 C powder is mixed evenly according to the proportion, where B 4 The addition of C powder is 6.7% of the total weight, put it into the mixing tank, and use the molecular pump to vacuumize the mixing tank, and the vacuum degree is controlled at 0.3×10 -2 Below Pa, after that, the tank mill is mixed for 60 minutes at a speed of 100r / min;

[0061] 2) Powder filling: use a vibrating table to pour the mixed powder into the metal sheath;

[0062] 3) Package welding and sealing: Use a molecular pump to pump the vacuum of the package filled with powder to 1×10 -3 Pa, using an argon arc welding machine to seal and weld the sheath;

[0063] 4) Leak detecti...

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Abstract

The invention discloses a titanium-based composite material and a preparation method thereof. The method can reduce the content of impurity elements in the composite material, greatly reduce the compositional inhomogeneity of the composite material, and reduce the difficulty of smelting the titanium-based composite material with a high volume fraction (reinforced phase volume fraction greater than 15%). Specifically: the titanium-based composite electrode used in the vacuum consumable electrode arc solidification melting furnace is prepared by powder metallurgy. The raw materials for the preparation of titanium-based composite materials are vacuum mixed with a tank mill, and then the mixed materials are poured into the pre-prepared metal sheath for vacuum welding and packaging, and the sheath is checked for air leakage after welding. Then the packaged package is subjected to a hot isostatic pressing process. The electrode ingots obtained after hot isostatic pressing are machined and pickled to remove the metal sheath, and a plurality of prepared electrode ingots are welded into electrodes for vacuum consumable electrodes and arc solidification furnaces. Electrode arc shell solidification furnace for vacuum centrifugal casting castings.

Description

technical field [0001] The invention relates to a preparation technology of a titanium-based composite material, in particular to a preparation technology combining powder metallurgy and vacuum consumable electrode smelting. Background technique [0002] Hydraulic technology is used to mix materials to prepare titanium-based composite materials. In this way, the size of sponge titanium particles is large (generally greater than 1mm) and the shape of particles is irregular. It is difficult to mix uniformly during the mixing process, resulting in the preparation of master alloy ingots. The reinforcement segregation is serious, which makes melting difficult, and requires multiple remelting to solve the segregation of components. At the same time, when ceramic phase reinforcement is added to titanium alloy, as the volume fraction of the reinforcement phase increases, the melting temperature of the titanium-based composite material will increase significantly, resulting in a sign...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22B9/20B22F3/15
CPCB22F3/15C22B9/20C22C14/00
Inventor 赵军刘时兵史昆任亚飞张志勇曲赫威刘宏宇刘鸿羽
Owner SHENYANG RES INST OF FOUNDRY
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