Preparation method of molybdenum rhenium lanthanum alloy material

An alloy material, molybdenum-rhenium technology, applied in the field of preparation of molybdenum-rhenium-lanthanum alloy materials, can solve problems such as poor doping uniformity, increased rhenium content, and increased manufacturing costs of molybdenum-rhenium alloys, so as to improve the performance of molybdenum alloys and expand the scope of use Effect

Active Publication Date: 2017-05-31
JINDUICHENG MOLYBDENUM CO LTD
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Problems solved by technology

Usually, the rhenium content in molybdenum-rhenium alloys is divided into low rhenium (2% to 5%) molybdenum alloys and high rhenium (11% to 50%) molybdenum alloys. Low rhenium molybdenum alloys have low rhenium content. The solid-liquid doping uniformity of the formula is poor, so that the strengthening advantage of rhenium in molybdenum is not obvious, and the uniformity problem even weakens the performance of matrix molybdenum. Therefore, the conventional method is to increase the rhenium content to increase the strengthening effect of rhenium on molybdenum, so that Obtain high rhenium-molybdenum alloy, which significantly increases the manufacturing cost of molybdenum-rhenium alloy

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  • Preparation method of molybdenum rhenium lanthanum alloy material
  • Preparation method of molybdenum rhenium lanthanum alloy material
  • Preparation method of molybdenum rhenium lanthanum alloy material

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Embodiment 1

[0029] The preparation method of the molybdenum-rhenium-lanthanum alloy material in this embodiment comprises the following steps:

[0030] Step 1. At first, the composition of the molybdenum-rhenium-lanthanum alloy material is designed so that the alloy material includes the following metal components in mass percentages: Re 1.0%, La 2.0%, and the balance is Mo; then, weigh them respectively according to the designed composition Get nano-lanthanum oxide powder (mass purity 99.99%, particle size 30nm), rhenium powder (mass purity 99.99%, particle size 30nm) and molybdenum dioxide powder (mass purity 96.2%, particle size is 3 μm, molybdenum content 72% in the molybdenum dioxide powder );

[0031] In the present embodiment, the mass m of the nano-lanthanum oxide powder taken 1 =2.35×10 3 g, the mass of rhenium powder weighed is 1.0×10 3 g, the mass of the molybdenum dioxide powder taken is 134.72×10 3 g;

[0032] Step 2, take nano lanthanum oxide powder again, the quality o...

Embodiment 2

[0040] The preparation method of the molybdenum-rhenium-lanthanum alloy material in this embodiment comprises the following steps:

[0041] Step 1. At first, the composition of the molybdenum-rhenium-lanthanum alloy material is designed so that the alloy material includes the following metal components in mass percentages: Re 5.0%, La 0.2%, and the balance is Mo; then, weigh them respectively according to the designed composition Get nano-lanthanum oxide powder (mass purity 99.99%, particle size 80nm), rhenium powder (mass purity 99.99%, particle size 1 μm) and molybdenum dioxide powder (mass purity 97.3%, particle size 10 μm, molybdenum content 73% in the molybdenum dioxide powder );

[0042] In the present embodiment, the mass m of the nano-lanthanum oxide powder taken 1 =234.5g, the quality of the rhenium powder taken is 5.0×10 3 g, the mass of the molybdenum dioxide powder taken is 129.9×10 3 g;

[0043] Step 2, take nano lanthanum oxide powder again, the quality of th...

Embodiment 3

[0051] The preparation method of the molybdenum-rhenium-lanthanum alloy material in this embodiment comprises the following steps:

[0052] Step 1. At first, the composition of the molybdenum-rhenium-lanthanum alloy material is designed so that the alloy material includes the following metal components in mass percentages: Re 1.0%, La 0.02%, and the balance is Mo; then, weigh them respectively according to the designed composition Get nano-lanthanum oxide powder (mass purity 99.99%, particle size 50nm), rhenium powder (mass purity 99.99%, particle size 0.1 μm) and molybdenum dioxide powder (mass purity 98.7%, particle size is 5 μm, molybdenum content in the molybdenum dioxide powder is 74 %);

[0053] In the present embodiment, the mass m of the nano-lanthanum oxide powder taken 1 =23.5g, the quality of the rhenium powder taken is 1.0×10 3 g, the mass of the molybdenum dioxide powder taken is 133.8×10 3 g;

[0054] Step 2, take nano lanthanum oxide powder again, the qualit...

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Abstract

The invention provides a preparation method of a molybdenum rhenium lanthanum alloy material. The preparation method comprises the following steps: (1) components of the molybdenum rhenium lanthanum alloy material are designed; and then, nanometer lanthanum oxide powder, rhenium powder and molybdenum dioxide powder are respectively weighed according to the designed components; (2) the nanometer lanthanum oxide powder is weighed again; (3) the nanometer lanthanum oxide powder weighed in the steps (1) and (2) is uniformly mixed to add in de-ionized water for dispersion and filtration to obtain filtrate; (4) the rhenium powder is added in the filtrate for dispersion to obtain mixed liquid, and is added in the molybdenum dioxide powder; (5) hydrogen is used for reduction to obtain a reduction material for screening and mixing to obtain reduction alloy powder; and (6) the isostatic pressing is performed to obtain a pressed blank; and the pressed blank is sintered to obtain the molybdenum rhenium lanthanum alloy material. The alloy material is uniform and fine in particles; grains in a slab fracture are fine; the grain boundary is clear and pure; and no visible agglomerated second-phase particle is in the grain boundary and crystals, so that the nanoparticles in the alloy material are excellent in dispersion effect to satisfy the technical requirements.

Description

technical field [0001] The invention belongs to the technical field of alloy material preparation, and in particular relates to a method for preparing a molybdenum-rhenium-lanthanum alloy material. Background technique [0002] Molybdenum-rhenium alloy is adding rhenium to molybdenum to improve the plasticity of molybdenum and increase the strength of molybdenum. It is a solid solution strengthening alloy. Molybdenum-lanthanum alloy is adding lanthanum oxide particles into the molybdenum matrix, which is a dispersion strengthening alloy. By adding nanoscale or submicron rhenium powder particles into the molybdenum matrix to form a dispersion-distributed solid-solution-strengthened molybdenum-rhenium alloy, and nano-scale lanthanum oxide particles pin the dispersion-distributed solid-solution-strengthened molybdenum-rhenium alloy grain boundaries to form dispersion strengthening , and finally get composite strengthened molybdenum alloy. At the same time, due to the high pric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04
CPCC22C1/045
Inventor 刘仁智杨秦莉庄飞王娜崔玉青赵虎
Owner JINDUICHENG MOLYBDENUM CO LTD
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