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High-density ultra-fine grain molybdenum lanthanum alloy and preparation method thereof

A molybdenum-lanthanum alloy and density technology is applied in the field of metallurgy, which can solve the problems of large grain size, poor performance and low density of molybdenum-lanthanum alloy, and achieve the effects of uniform composition and structure, reducing energy consumption and improving efficiency.

Active Publication Date: 2022-06-24
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a high-density ultra-fine-grained molybdenum-lanthanum alloy and its preparation method, which solves the problem of low density and large grain size of the molybdenum-lanthanum alloy in the prior art. Technical issues with poor performance

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  • High-density ultra-fine grain molybdenum lanthanum alloy and preparation method thereof

Examples

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Embodiment 1

[0047] The present embodiment provides a method for preparing a high-density ultrafine-grained molybdenum-lanthanum alloy, which specifically includes the following steps:

[0048] Step 1, preparing lanthanum oxide doped molybdenum dioxide powder;

[0049] Configuration of lanthanum oxide suspension: Weigh 1.188kg of rare earth lanthanum oxide powder into deionized water, fully stir it with a magnetic stirrer to completely disperse it, and obtain a lanthanum oxide suspension. Using high-pressure air, spray the prepared lanthanum oxide suspension into 150kg of molybdenum dioxide powder, and stir evenly while spraying to prepare mixture A. After heating and drying the prepared mixture A in a vacuum state, an oxidized Lanthanum doped molybdenum dioxide powder. The lanthanum oxide doped molybdenum dioxide powder is composed of the following raw materials in terms of mass percentage: 0.8% of lanthanum oxide and 99.2% of molybdenum dioxide.

[0050] Step 2, preparing molybdenum la...

Embodiment 2

[0060] This example presents a method for preparing a high-density ultrafine-grained molybdenum-lanthanum alloy, which is basically the same as Example 1, except that in step 5 of this example, after the third heat preservation is completed, the method is cooled to room temperature, and then a fourth temperature rise was performed to increase the temperature from room temperature to 1700 °C.

[0061] Using the preparation method of the high-density ultra-fine-grained molybdenum-lanthanum alloy in this embodiment, the final high-density ultra-fine-grained molybdenum-lanthanum alloy has a density of 99.2% and a grain size of about 3 μm.

Embodiment 3

[0063] This example presents a method for preparing a high-density ultrafine-grained molybdenum-lanthanum alloy, which is basically the same as Example 1, except that in step 5 of this example, after the third heat preservation is completed, the method is cooled to room temperature, and then a fourth temperature rise was performed to increase the temperature from room temperature to 1800 °C.

[0064] Using the preparation method of the high-density ultra-fine-grained molybdenum-lanthanum alloy in this embodiment, the final high-density ultra-fine-grained molybdenum-lanthanum alloy has a density of 99.4% and a grain size of about 3 μm.

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Abstract

The invention provides a high-density ultra-fine grain molybdenum-lanthanum alloy and a preparation method thereof. The preparation method comprises the following five steps: preparing lanthanum oxide doped molybdenum dioxide powder, preparing molybdenum-lanthanum alloy powder, obtaining molybdenum-lanthanum alloy fine powder, preparing a molybdenum-lanthanum alloy initial compact and preparing the high-density ultra-fine grain molybdenum-lanthanum alloy. According to the preparation method of the high-density ultra-fine grain molybdenum-lanthanum alloy, the thermal activation energy of the molybdenum-lanthanum alloy can be effectively reduced through non-continuous heating sintering treatment, so that rapid growth of grains is inhibited, and it is guaranteed that the prepared molybdenum-lanthanum alloy is high in density and small in grain size. The high-density ultra-fine grain molybdenum lanthanum alloy is high in density and very fine in grain, and has excellent performance and wide popularization and application prospects.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, relates to a molybdenum-lanthanum alloy, and in particular relates to a high-density ultrafine-grained molybdenum-lanthanum alloy and a preparation method thereof. Background technique [0002] Molybdenum-lanthanum alloy is a high-temperature refractory metal material with excellent comprehensive properties. Energy, chemical industry, metallurgy, nuclear industry and other fields have been widely used, with irreplaceable functions and application requirements, occupying an important position in the rapid development of national economy and science and technology, so the performance requirements of molybdenum-lanthanum alloy materials are also continuously improving. [0003] In the preparation of high-density molybdenum-lanthanum alloy, since the molybdenum-lanthanum alloy powder is very sensitive to temperature changes, the grains will grow rapidly when encountering high temperature during t...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C27/04B22F3/10B22F9/22
CPCC22C1/045C22C27/04B22F3/1017B22F9/22
Inventor 周莎张晓席莎安耿陈成朱琦何凯
Owner JINDUICHENG MOLYBDENUM CO LTD
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