Molybdenum-yttrium alloy wire preparation method

A technology of alloy wire and molybdenum powder, which is applied in the field of preparation of molybdenum-yttrium alloy wire, can solve the problems of inconsistent wire properties, uneven doping element content, poor ductility, etc., and achieve good performance consistency and good use effect , Improve the effect of uniformity

Inactive Publication Date: 2010-02-10
金堆城钼业光明(山东)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing pure molybdenum wire has a low recrystallization temperature, while other molybdenum-lanthanum alloys have a higher recrystallization temperature, but their ductility is not good, so they cannot be used for rolling molybdenum foil strips
At present, the preparation of molybdenum-yttrium alloy wire mostly uses yttrium oxide powder mixed with molybdenum powder, which is easy to cause uneven content of doping elements and inconsistent wire properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The raw material is ammonium molybdate, brand MSA-1, calcined at 500°C to obtain molybdenum trioxide, and then reduced by hydrogen at 450-550°C to obtain molybdenum dioxide; use analytical grade yttrium nitrate to prepare yttrium nitrate solution, yttrium nitrate The weight ratio of yttrium nitrate and water in the solution is preferably 1: 5, the total amount of yttrium nitrate in the yttrium nitrate aqueous solution, according to the content of Y in the molybdenum yttrium alloy wire 2 o 3 Theoretical meter, yttrium nitrate solution should completely cover MoO 2 Powder, soaked for 24 hours, then dried, mixed for 6 hours, to ensure uniform doping composition; then hydrogen reduction in a furnace at 800-1000 ° C to obtain doped rare earth oxide Y 2 o 3 Molybdenum powder; then put the doped molybdenum powder into the rubber sleeve, press it into a round rod shape with an isostatic press under a pressure of 160-200MPa, and then sinter at a high temperature of 2000°C in a...

Embodiment 2

[0020] press Y 2 o 3 0.1% doping by weight, 34g yttrium nitrate (Y 2 o 3 Content 29.5%) dissolved in pure water, added to 13.33kg of molybdenum dioxide powder, heated to decompose, mixed evenly, and then reduced with hydrogen in a furnace at 800-1000°C to obtain doped rare earth oxide Y 2 o 3 10kg of molybdenum powder with a content of 0.1%. Fill the doped molybdenum powder into the rubber sleeve and press it into a round molybdenum rod with an isostatic press under a pressure of 160-200Mpa, and then sinter at a high temperature of 2000°C in an intermediate frequency sintering furnace to obtain a Y-containing 2 o 3 0.1% molybdenum rod. Then it is processed into molybdenum-yttrium alloy wire through multi-pass swaging and stretching.

Embodiment 3

[0022] press Y 2 o 3 0.6% doping by weight, with 204g yttrium nitrate (Y 2 o 3 Content 29.5%) dissolved in pure water, added to 13.33kg of molybdenum dioxide powder, heated to decompose, mixed evenly, and then reduced with hydrogen in a furnace at 800-1000°C to obtain doped rare earth oxide Y 2 o 3 10kg of molybdenum powder with a content of 0.6%. Fill the doped molybdenum powder into the rubber sleeve and press it into a round molybdenum rod with an isostatic press under a pressure of 160-200Mpa, and then sinter at a high temperature of 2000°C in an intermediate frequency sintering furnace to obtain a Y-containing 2 o 3 0.6% molybdenum rod. Then it is processed into molybdenum-yttrium alloy wire through multi-pass swaging and stretching.

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Abstract

The invention provides a molybdenum-yttrium alloy wires preparation method and is characterized in that the preparation method comprises the following steps: immersing molybdenum dioxide powder in yttrium nitrate solution, drying, mixing evenly, reducing with hydrogen at 800-1000 DEG C to obtain molybdenum powder doped with rare earth oxide Y2O3, isostatic pressing the obtained molybdenum powder at 160-200MPa to prepare rods, then sintering the rods at high temperature and finally rotary swaging and drawing to obtain molybdenum wires. The method of the invention effectively increases the uniformity of doping elements and can be used in mess production, the uniformity of the processed molybdenum-yttrium alloy wires is good and the rolled molybdenum foil strip has good using effect.

Description

technical field [0001] A preparation method of molybdenum-yttrium alloy wire relates to a preparation method of a rare earth molybdenum alloy material used as a rolled high-temperature molybdenum foil strip. Background technique [0002] Molybdenum-yttrium alloy wire has good processing performance and high recrystallization temperature. In terms of rolling molybdenum foil strips for high temperature resistance, the new process of directly rolling various molybdenum foil strips with molybdenum wires has very obvious advantages. The existing pure molybdenum wire has a low recrystallization temperature, while other molybdenum-lanthanum alloys have a higher recrystallization temperature, but their ductility is not good, so they cannot be used for rolling molybdenum foil strips. At present, the preparation of molybdenum-yttrium alloy wire mostly uses the mixture of yttrium oxide powder and molybdenum powder, which is easy to cause uneven content of doping elements and inconsiste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16B22F9/22
Inventor 李世伟王庆国孟庆乐黄立峰
Owner 金堆城钼业光明(山东)股份有限公司
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