Titanium nickel aluminium molybdenum alloy material and preparation process thereof

A preparation process and molybdenum alloy technology, which is applied in the field of titanium-nickel-aluminum-molybdenum alloy material and its preparation process, can solve the problems of low mechanical properties of powder metallurgy materials, achieve the goal of improving strength, promoting alloy structure refinement, and promoting sintering densification Effect

Inactive Publication Date: 2013-02-06
CHANGSHU LIONY METALS
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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 aluminium molybdenum alloy material and preparation process thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 As shown, a kind of titanium-nickel-aluminum-molybdenum 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 a particle size of 600 mesh, nickel powder with 1000 mesh, aluminum powder with 600 mesh, and nickel-molybdenum pre-alloyed powder with a molybdenum content of 20wt.% in 200 mesh for batching. The composition is calculated by atomic percentage, titanium 48.5% , Nickel 46.5%, Aluminum 4.5%, Molybdenum 0.5%.

[0031] Step 2, ball milling and mixing: put the above-mentioned powder into a ball mill tank at a ball-to-material ratio of 5:1, and ball mill it for 3 hours at a speed of 300r / min; ; 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 molding with a molding pressure of 4...

Embodiment 2

[0040] A kind of titanium-nickel-aluminum-molybdenum alloy material and its preparation process according to the present invention, concrete steps and process conditions thereof are as follows:

[0041] Step 1, batching: take titanium powder with a particle size of 800 mesh, nickel powder with 2000 mesh, aluminum powder with 800 mesh, nickel-molybdenum pre-alloyed powder with a molybdenum content of 20wt.% in 300 mesh for batching, and its composition is calculated by atomic percentage, titanium 47% , nickel 46%, aluminum 6.2%, molybdenum 0.8%.

[0042] Step 2, ball milling and mixing: put the above-mentioned powder into a ball mill tank at a ball-to-material ratio of 5:1, and ball mill for 4 hours at a speed of 250r / min; ; Then pass the ball-milled mixture 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 molding with a molding pressure of 300 MPa to obtain a pressed blank...

Embodiment 3

[0049] A kind of titanium-nickel-aluminum-molybdenum alloy material and its preparation process according to the present invention, concrete steps and process conditions thereof are as follows:

[0050] Step 1, batching: take titanium powder with a particle size of 1000 mesh, nickel powder with 1500 mesh, aluminum powder with 1000 mesh, nickel-molybdenum pre-alloyed powder with a molybdenum content of 20wt.% in 400 mesh for batching, and its composition is calculated by atomic percentage, titanium 48% , Nickel 45%, Aluminum 6%, Molybdenum 1%.

[0051] Step 2, ball milling and mixing: put the above-mentioned powder into a ball mill tank at a ball-to-material ratio of 5:1, and ball mill it for 5 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.

...

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Abstract

The invention relates to a titanium nickel aluminium molybdenum alloy material which is of a hollow cathode plasma sintering body and comprises the following components in atomic percent: 47-48.5% of titanium, 45-46.5% of nickel, 0.5-1% of molybdenum and the balance of aluminium, wherein the titanium content is 1-3% higher than the nickel content. A preparation process of the titanium nickel aluminium molybdenum alloy material comprises the following steps of: weighing titanium powder with certain granularity, nickel powder, aluminium powder and prealloy powder with the molybdenum content of 20wt% in the atomic percent of each component, carrying out ball milling, mixing, sieving, and obtaining a compacted blank by virtue of compression moulding; and forming a hollow cathode by virtue of the compacted blank and a graphite plate reflecting screen, realizing high-temperature rapid sintering on the compacted blank by adopting a hollow cathode plasma sintering method, and cooling, so that the alloy material is obtained. The titanium nickel aluminium molybdenum alloy material provided by the invention has good plasticity and strength, grains of the sintering body are uniform, the structure is compact, and the cost is low. The hollow cathode plasma sintering preparation process is simple, the problem that requirement on smelting and casting technological equipment is high is solved, the preparation temperature is obviously reduced, the material utilization is improved, the energy consumption is reduced, and the cost is saved.

Description

technical field [0001] The invention relates to an alloy and a preparation process thereof, in particular to a titanium-nickel-aluminum-molybdenum 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), resulting in heavy components and equipment, large 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 wheel 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 need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C1/04
Inventor 刘子利温筱山刘伯路刘希琴陈志华温宸
Owner CHANGSHU LIONY METALS
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