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Titanium-nickel-aluminum alloy material and preparation technique thereof

An aluminum alloy material and a preparation process technology, which are applied in the field of titanium-nickel-aluminum alloy materials and their preparation technology, can solve the problems of low mechanical properties of powder metallurgy materials, and achieve the effects of improving strength, promoting sintering densification, and good room temperature plasticity

Active Publication Date: 2013-02-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existence of internal pores leads to low mechanical properties of powder metallurgy materials. How to improve the density is the focus of research and development of powder metallurgy materials and their forming technology

Method used

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  • Titanium-nickel-aluminum alloy material and preparation technique thereof
  • Titanium-nickel-aluminum alloy material and preparation technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, a kind of titanium-nickel-aluminum alloy material and its preparation process according to the present invention, the specific steps and its process conditions are as follows:

[0030] Step 1, batching: take titanium powder with an atomic percentage of 49% and a particle size of 600 mesh, nickel powder with an atomic percentage of 47% and a particle size of 1000 mesh, and aluminum powder with an atomic percentage of 4% and a particle size of 600 mesh for batching.

[0031] Step 2, ball milling and mixing: put the above powder into a ball mill tank at a ball-to-material ratio of 5:1, and ball mill for 1 hour at a speed of 300r / min; in order to prevent the powder from being oxidized during the ball milling process, the ball mill tank is protected by argon ; Then pass the ball-milled mixture through the 100-mesh sieve specified in GB / T6005.

[0032] In step 3, the mixed material after ball milling and sieving in step 2 is subjected to two-way mo...

Embodiment 2

[0040] A kind of titanium-nickel-aluminum alloy material and preparation technology thereof of the present invention, specific steps and its technological conditions are as follows:

[0041] Step 1, batching: take titanium powder with an atomic percentage of 47% and a particle size of 800 mesh, nickel powder with an atomic percentage of 46% and a particle size of 2000 mesh, and aluminum powder with an atomic percentage of 7% and a particle size of 800 mesh for batching.

[0042] Step 2, ball milling and mixing: put the above powder into a ball mill tank at a ball-to-material ratio of 5:1, and ball mill it for 1.5 hours at a speed of 250r / min; in order to prevent the powder from being oxidized during the ball milling process, argon gas is introduced into the ball mill tank Protection; then the ball-milled mixture passes through the 100-mesh sieve specified in GB / T6005.

[0043] In step 3, the mixed material after ball milling and sieving in step 2 is subjected to two-way moldin...

Embodiment 3

[0049] A kind of titanium-nickel-aluminum alloy material and preparation technology thereof of the present invention, specific steps and its technological conditions are as follows:

[0050] Step 1, batching: take titanium powder with an atomic percentage of 48% and a particle size of 1000 mesh, nickel powder with an atomic percentage of 45% and a particle size of 1500 mesh, and aluminum powder with an atomic percentage of 7% and a particle size of 1000 mesh for batching.

[0051] Step 2, ball milling and mixing: put the above powder into a ball mill tank at a ball-to-material ratio of 5:1, and ball mill it for 2 hours at a speed of 200r / min; ; Then pass the ball-milled mixture through the 100-mesh sieve specified in GB / T6005.

[0052] In step 3, the mixed material after ball milling and sieving in step 2 is subjected to two-way molding with a molding pressure of 500 MPa to obtain a compact.

[0053] Step 4, place the pressed blank prepared in step 3 on the cathode in the vac...

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Abstract

A titanium-nickel-aluminum alloy material is of a hollow cathode plasma sintered body and consists of the following components in percentage by atom weight, 47-9% of titanium, 45-47% of nickel and the balance of aluminum, wherein the content of the titanium is 1-3% more than the content of the nickel. The preparation technique comprises the following steps of: batching according to the atom percentage of all the components, mixing by a ball mill, screening and carrying out compression molding to obtain a compact; forming a hollow cathode by the compact and a graphite plate reflection screen, carrying out high-temperature fast sintering on the compact by using a hollow cathode plasma sintering method, and cooling to finally obtain the alloy material. The titanium-nickel-aluminum alloy material prepared by the invention has the advantages of excellent plasticity and strength, even sintered body crystal size, compact tissue and low cost. The hollow cathode plasma sintering preparation process is simple, the difficulty of high demand of smelting casting technique equipment is solved, the preparation temperature is significantly lowered, the material use ratio is increased, and the energy consumption and the cost are reduced.

Description

technical field [0001] The invention relates to an alloy and a preparation process thereof, in particular to a titanium-nickel-aluminum alloy material and a preparation process thereof. Background technique [0002] At present, in the fields of power, petrochemical, aviation and aerospace, the metal structural materials that can work for a long time at a high temperature above 600°C and under a certain stress are mainly nickel-based, iron-based and cobalt-based superalloys, but these materials have high Density (generally 8.0g / cm 3 above) result in heavy components and equipment, high energy consumption, low efficiency, and even some potential unsafe factors, such as the high specific gravity of the nickel-based alloy during the rotation of the engine disc and blades, resulting in a huge internal centrifugal force . Therefore, new lightweight high-temperature structural materials with low density and high specific strength must be developed to meet the needs of the develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/04
Inventor 刘子利温宸刘伯路刘希琴陈志华温筱山
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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