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A kind of preparation method of rare earth molybdenum alloy mixed powder

A technology of mixed powder and molybdenum alloy, which is applied in the field of preparation of rare earth molybdenum alloy mixed powder, to achieve the effect of simple preparation method, easy control of production process and suitable for large-scale production

Active Publication Date: 2021-02-05
XIAN REFRA TUNGSTEN & MOLYBDENUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the rare earth oxide powder is first mixed with ethanol to form a slurry, and then mixed with molybdenum powder to form a slurry, and then dried to obtain a rare earth molybdenum alloy mixed powder, which overcomes the problems in the process of preparing rare earth molybdenum alloy mixed powder by solid-solid doping. Dust pollution and composition segregation problems, improve the distribution uniformity of rare earth oxide powder in rare earth molybdenum alloy mixed powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of the present embodiment comprises the following steps:

[0019] Step 1. Add 140 g of lanthanum oxide powder with an average Fischer particle size of 3.0 μm into 978 mL of ethanol with a volume purity of 96% and mix evenly to obtain a mixed slurry A;

[0020] Step 2, mixing the mixed slurry A obtained in the step 1 with 6860g of molybdenum powder with an average Fischer particle size of 5.0 μm to obtain the mixed slurry B;

[0021] Step 3. Vacuum-dry the mixed slurry B obtained in Step 2 under the conditions of a pressure of 200 Pa and a temperature of 40° C. to obtain a lanthanum oxide-molybdenum alloy mixed powder.

Embodiment 2

[0023] The preparation method of the present embodiment comprises the following steps:

[0024] Step 1. Add 60 g of cerium oxide powder with an average Fischer particle size of 2.0 μm into 992 mL of ethanol with a volume purity of 98% and mix evenly to obtain a mixed slurry A;

[0025] Step 2, mixing the mixed slurry A obtained in the step 1 with 5940g of molybdenum powder with an average Fischer particle size of 1.6 μm to obtain the mixed slurry B;

[0026] Step 3. Vacuum-dry the mixed slurry B obtained in Step 2 under the conditions of a pressure of 600 Pa and a temperature of 50° C. to obtain a cerium oxide molybdenum alloy mixed powder.

Embodiment 3

[0028] The preparation method of the present embodiment comprises the following steps:

[0029] Step 1. Add 50 g of thorium oxide powder with an average Fischer particle size of 0.2 μm into 1995 mL of ethanol with a volume purity of 99% and mix evenly to obtain a mixed slurry A;

[0030] Step 2, mixing the mixed slurry A obtained in the step 1 with 9950g of molybdenum powder with an average Fischer particle size of 3.0 μm to obtain the mixed slurry B;

[0031] Step 3. Vacuum-dry the mixed slurry B obtained in Step 2 under the conditions of a pressure of 1000 Pa and a temperature of 65° C. to obtain thorium oxide molybdenum alloy mixed powder.

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Abstract

The invention discloses a rare earth molybdenum alloy mixed powder preparation method. The method includes: firstly, adding rare earth oxide powder in average Fisher particle size not larger than 3.0micron into ethyl alcohol in volume purity larger than 19%, and well mixing to obtain mixed slurry A; secondly, well mixing the mixed slurry A with molybdenum powder in average Fisher particle size of1.6-5.0micron to obtain mixed slurry B; thirdly, subjecting the mixed slurry B to vacuum drying to obtain rare earth molybdenum alloy mixed powder. The rare earth oxide powder and the ethyl alcohol are mixed into slurry, then the slurry is mixed with the molybdenum powder to obtain slurry, and the slurry is dried to obtain the rare earth molybdenum alloy mixed powder, so that problems of dust pollution and composition segregation in a process of solid-solid doping preparation of the rare earth molybdenum alloy mixed powder are solved, and distribution uniformity of rare earth oxide powder in the rare earth molybdenum alloy mixed powder is improved.

Description

technical field [0001] The invention belongs to the technical field of molybdenum alloy powder preparation, and in particular relates to a preparation method of rare earth molybdenum alloy mixed powder. Background technique [0002] Molybdenum is a refractory metal with high boiling point and high melting point. It has a wide range of uses in the iron and steel industry, nonferrous metallurgy, electronics, electric light source, chemical industry, agriculture and other fields. With the continuous advancement of science and technology, the application field of molybdenum is expanding. Rare earth molybdenum alloys can be obtained by adding a small amount of rare earth oxides such as lanthanum oxide and cerium oxide (0.2wt% to 2wt%) in molybdenum alloys. Compared with ordinary molybdenum alloys, the high temperature mechanical properties and recrystallization properties of rare earth molybdenum alloys are greatly improved. . [0003] According to various open data at present,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00
CPCB22F1/0003
Inventor 淡新国范文博林三元朱博张清王喆
Owner XIAN REFRA TUNGSTEN & MOLYBDENUM