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Preparation method of nickel and aluminum-based multiphase alloy

A nickel-aluminum-based and alloy technology, applied in the chemical industry, can solve the problems of inability to obtain nickel-aluminum-based composite alloy blocks, poor fluidity, and difficulty in filling, and achieves overcoming a large number of irregular edges and corners, reducing risks, and internal density. Effect

Active Publication Date: 2017-06-23
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, although it does not use metal powder as raw material, the liquid Al 3 Ni phase and Al 3 Ni 2 The nickel-aluminum-based multi-phase alloy of the phase has poor fluidity and is not easy to fill, and it is still impossible to obtain a nickel-aluminum-based multi-phase alloy block with regular shape and accurate size.

Method used

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  • Preparation method of nickel and aluminum-based multiphase alloy
  • Preparation method of nickel and aluminum-based multiphase alloy
  • Preparation method of nickel and aluminum-based multiphase alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Taking the preparation of a nickel-aluminum-based multiphase alloy with a component content of 30% nickel and 70% aluminum as an example, the following steps are included:

[0045] (1) Mold loading: Assemble a metal mold with a diameter of 5mm and a length of 5mm in the negative pressure suction casting system in the vacuum electric arc furnace;

[0046] (2) Sample loading: start the vacuum electric arc furnace, put high-purity Ni and high-purity Al (>99.9wt.%) with a nominal composition of 70Al-30Ni into the crucible of the vacuum electric arc furnace;

[0047] (3) Vacuuming: Open the vacuum valve and vacuumize until the vacuum degree is 2.0×10 -3 MPa, then tighten the vacuum valve;

[0048] (4) Gas filling: Pour argon gas into the sample chamber of the vacuum electric arc furnace until the vacuum degree is 0.5MPa;

[0049] (5) Repeat steps 3 to 4;

[0050] (6) The vacuum electric arc furnace is energized to melt Ni and Al, and continues to heat until the metal is m...

Embodiment 2

[0056] The difference between this embodiment and embodiment 1 is that the component content in the nickel-aluminum base multiphase alloy is 65% nickel and 35% aluminum, and the vacuum degree in step 3 is 5.0×10 -3 MPa, in step 4 and step 8, argon gas is flushed until the vacuum degree is 0.65MPa, in step 6, the heating temperature is 1620°C, in step 7, keep warm for 2 minutes, the output current of magnetic stirring is 15A, and suction cast into a regular block of φ15mm×15mm body.

[0057] The microstructure and phase analysis of the nickel-aluminum-based multiphase alloy prepared in this example are consistent with the results of Example 1, and will not be repeated here.

Embodiment 3

[0059] The difference between this embodiment and embodiment 1 is that the component content in the nickel-aluminum base multiphase alloy is 67% nickel and 33% aluminum, and the vacuum degree in step 3 is 3.0×10 -3 MPa, in step 4 and step 8, argon gas is flushed until the vacuum degree is 0.55MPa, in step 6, the heating temperature is 1610°C, in step 7, the temperature is kept for 1.5min, the output current of magnetic stirring is 10A, and the suction casting is φ12mm×12mm blocks.

[0060] The microstructure and phase analysis of the nickel-aluminum-based multiphase alloy prepared in this example are consistent with the results of Example 1, and will not be repeated here.

[0061] In summary, the nickel-aluminum-based multiphase alloy is prepared by the present invention, the raw material is not powder, the incidence of safety accidents is reduced, and the surface quality of the nickel-aluminum-based multiphase alloy is good, the size and shape of the block are regular, the co...

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Abstract

The invention provides a preparation method of nickel and aluminum-based multiphase alloy. According to the preparation method, the nickel and aluminum-based multiphase alloy is obtained after raw materials are subjected to pressure casting in vacuum. Compared with the prior art, the preparation method of the nickel and aluminum-based multiphase alloy has the advantages that pressure casting is adopted, the nickel and aluminum-based multiphase alloy is good in surface quality and compact in interior, the effect that a plurality of castings are obtained through one die can be achieved, and requirements of various fixed bed reactors and fluidized bed reactors are met; and the mode that in the traditional technique, powder serves as a raw material is abandoned, and chemical components are more accurate, safer and more effective. Above all, the nickel and aluminum-based multiphase alloy manufactured through the preparation method is good in surface quality, accurate in chemical component and dimension, compact in interior, good in production condition, low in basic investment and suitable for production of nickel and aluminum-based multiphase alloy of various dimensions, and accordingly the nickel and aluminum-based multiphase alloy has quite broad application prospects.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for preparing an alloy, in particular to a method for preparing a nickel-aluminum base multiphase alloy with catalytic function. Background technique [0002] Due to the composite intermetallic compound - nickel-aluminum alloy has the advantages of high melting point, low density, high specific strength, good oxidation resistance, high temperature strength, etc., and due to the unique chemical reaction relationship between elemental aluminum and elemental nickel, it has Good catalytic performance. al 3 Ni phase and Al 3 Ni 2 As one of the ideal catalytic materials, nickel-aluminum-based multi-phase alloys with different phases have the functions of hydrogenation, dehydrogenation, deacidification, oxidation, and methanation. It is widely used in petrochemical, pharmaceutical, oil, spice, dye, synthetic fiber and other industries due to its advantages of high mechanica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02B22D18/04B01J23/755
CPCB01J23/755B22D18/04C22C1/023C22C1/026
Inventor 王振生谭清奇彭真苏新宋力
Owner HUNAN UNIV OF SCI & TECH
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