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Molybdenum alloy doped with aluminum oxide and preparation method thereof as well as molybdenum alloy wire

A molybdenum alloy and alumina technology, applied in the high temperature refractory field, can solve problems such as the limitation of raw material sources, and achieve the effects of good wear resistance and arc ablation resistance, high hardness and high wear resistance

Active Publication Date: 2017-02-22
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the source of aluminum used in this method can only be aluminum nitrate, and the source of raw materials is limited; secondly, the performance of the composite material needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The molybdenum alloy doped with alumina in this example contains α-Al 2 o 3The mass percentage of nanoparticles is 0.10%, and the balance is Mo and unavoidable impurity elements.

[0041] The preparation method of the aluminum oxide-doped molybdenum alloy of the present embodiment is:

[0042] 1) Preparation of AlOOH nanoparticle suspension by hydrothermal method: In an autoclave with a capacity of 250mL, add 21.5g of aluminum nitrate and 5.5g of urea respectively, add 20mL of glycerol as template agent and dispersant, and then add distilled water 200mL, with a filling degree of 80%, heat the autoclave to 180°C, hold for 15 hours, after cooling, a suspension containing AlOOH nanoparticles with good dispersion is obtained, and set aside;

[0043] 2) Dissolve 5000g of ammonium tetramolybdate in distilled water, add ammonia water to adjust the pH value to 8~10, add enough distilled water to ensure that ammonium tetramolybdate is completely dissolved to form a solution, a...

Embodiment 2

[0049] The molybdenum alloy doped with alumina in this example contains α-Al 2 o 3 The mass percentage of nanoparticles is 0.20%, and the balance is Mo and unavoidable impurity elements.

[0050] The preparation method of the aluminum oxide-doped molybdenum alloy of the present embodiment is:

[0051] 1) Prepare AlOOH nanoparticles by hydrothermal method. In an autoclave with a capacity of 250mL, add 40.8g of aluminum nitrate and 10.0g of urea respectively, add 20mL of glycerol as template agent and dispersant, and then add 250mL of distilled water, The filling degree is 80%, the autoclave is heated to 180 ° C, and the holding time is 15 h. After cooling, a suspension containing AlOOH nanoparticles with good dispersion is obtained, and it is set aside;

[0052] 2) Dissolve 5000g of ammonium dimolybdate in distilled water, add ammonia water to adjust the pH value to 8~10, add enough distilled water to ensure that ammonium dimolybdate is completely dissolved to form a solution...

Embodiment 3

[0058] The molybdenum alloy doped with alumina in this example contains α-Al 2 o 3 The mass percentage of nanoparticles is 0.5%, and the balance is Mo and unavoidable impurity elements.

[0059] The preparation method of the aluminum oxide-doped molybdenum alloy of the present embodiment is:

[0060] 1) Prepare AlOOH nanoparticles by hydrothermal method. In an autoclave with a capacity of 500 mL, add 88.85 g of aluminum sulfate and 26.4 g of urea, add 40 mL of glycerol as a template agent and dispersant, and then add 500 mL of distilled water. The filling degree is 80%, the autoclave is heated to 180 ° C, the holding time is 15 h, and the AlOOH nanoparticle suspension is obtained after cooling, and it is set aside;

[0061] 2) Dissolve 5000g of ammonium heptamolybdate in distilled water, add ammonia water to adjust the pH value to 8~10, add enough distilled water to ensure that the ammonium heptamolybdate is completely dissolved to form a solution, and then add step 1) to th...

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Abstract

The invention relates to a molybdenum alloy doped with aluminum oxide and a preparation method thereof as well as a molybdenum alloy wire, and belongs to the technical field of high-temperature refractory materials. The molybdenum alloy doped with the aluminum oxide is prepared from alpha-Al2O3 nanoparticles with the mass percent of 0.1 percent to 0.5 percent and the balance of molybdenum and unavoidable impurities. The preparation method of the molybdenum alloy doped with the aluminum oxide, provided by the invention, comprises the following steps: preparing AlOOH nanoparticle suspension liquid by a hydrothermal method; preparing ammonium molybdate and AlOOH nanoparticle composite powder by adopting a spray drying process; carrying out calcination, hydrogen gas reduction, pressing and sintering on the composite powder to prepare the molybdenum alloy. The molybdenum alloy wire provided by the invention is a molybdenum alloy wire with the diameter of 0.18mm to 0.60mm, which is prepared from the molybdenum alloy through rolling and wiredrawing processes. The alpha-Al2O3 nanoparticles have the characteristics of high rigidity, high wear resistance, good chemical and thermal stability and the like, so that the molybdenum alloy wire provided by the invention has good wear-resisting property and electric-arc ablation resisting property.

Description

technical field [0001] The invention relates to a molybdenum alloy doped with alumina, a preparation method thereof and a molybdenum alloy wire, belonging to the technical field of high-temperature refractory. Background technique [0002] Molybdenum wire is thinned molybdenum rod, divided into white molybdenum wire, black molybdenum wire, sprayed molybdenum wire, molybdenum wire for wire cutting, etc. Molybdenum wire is often used as a material for heating high-temperature furnaces, wire cutting of heating wire mesh for support materials, H 2 Furnace, heater rod guide rod hooks, mandrels, wires, etc. The molybdenum wires commonly used in the market are as follows: [0003] 1. Pure molybdenum wire. Used for winding core wires, supports, lead wires, heating elements, molybdenum foil strips, wire cutting, auto parts spraying, etc. [0004] 2. Lanthanum molybdenum wire. It is used for wire-wound core wire glass seals, molybdenum foil strips, furnace heating materials, wire...

Claims

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Application Information

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IPC IPC(8): C22C27/04C22C1/05C22C1/10
CPCC22C1/05C22C27/04C22C32/0031
Inventor 周玉成魏世忠徐流杰李秀青崔超鹏姚丽莹张国赏徐锐
Owner HENAN UNIV OF SCI & TECH
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