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Preparation method of molybdenum and zirconium alloy wire

A zirconium alloy and alloy powder technology, which is applied in the field of preparation of molybdenum-zirconium alloy wire, can solve the problems of low recrystallization temperature, easy embrittlement, and fracture of pure molybdenum wire, and achieve good welding performance, not easy to loop, and good high-temperature toughness Effect

Active Publication Date: 2013-12-04
JINDUICHENG MOLYBDENUM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing molybdenum-zirconium alloy wire, which solves the problems of low recrystallization temperature, high temperature embrittlement and fracture of existing pure molybdenum wire

Method used

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  • Preparation method of molybdenum and zirconium alloy wire

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[0013] The preparation method of the molybdenum-zirconium alloy wire of the present invention is specifically implemented according to the following steps: the average Fischer particle size is 2.5-3.8 μm, and the bulk density is 0.95-1.50 g / cm 3 Pure molybdenum powder and zirconium dioxide are solid-solid doped to obtain Mo-ZrO 2 alloy powder, the amount of zirconium dioxide added is 0.01-0.8% of the mass of pure molybdenum powder; the Mo-ZrO 2 The alloy powder is formed by cold isostatic pressing with a pressure of 150-200MPa and a holding time of 8-10 minutes; then undergoes intermediate frequency sintering with a maximum temperature of 1900-1980°C and a holding time of 4-6 hours; and then undergoes 203 rotary forging Billet opening is carried out in a muffle furnace protected by hydrogen at a temperature of 1400-1450°C and a holding time of 40-60 minutes. Finally, after stringing and drawing, the online heating temperature of stringing is 1100±50°C to obtain molybdenum Zir...

Embodiment 1

[0016] Weigh the average Fischer particle size of 2.9μm, bulk density of 1.15g / cm 3 30kg of pure molybdenum powder, 90g of analytically pure ZrO 2 Powder, will be weighed pure molybdenum powder and ZrO 2 Put the powder into a three-dimensional motion mixer for solid-solid doping, and after 3 hours of mixing, 30.09kgMo-ZrO 2 Alloy powder; the Mo-ZrO 2 The alloy powder is subjected to cold isostatic pressing, the pressing pressure is 180MPa, and the holding time is 8 minutes; then it is sintered at intermediate frequency, the highest sintering temperature is 1930°C, and the holding time is 6 hours to obtain 30.06kg and a unit weight of 1.0kg. 17mmMo-ZrO 2 Sintered alloy rod with a sintered density of 9.87g / cm 3 ;Take 10 pieces with a single weight of 1.0kg 17mmMo-ZrO 2 The 10.06kg sintered alloy rod is then subjected to 203 rotary forging to open the blank, and heated in a muffle furnace protected by hydrogen at a temperature of 1420°C and a holding time of 60min to obta...

Embodiment 2

[0018] Weigh an average Fischer particle size of 2.5 μm and a bulk density of 1.20 g / cm 3 30kg of pure molybdenum powder, 3g of analytically pure ZrO 2 Powder, will be weighed pure molybdenum powder and ZrO 2 The powder is put into a three-dimensional motion mixer for solid-solid doping, and 30.003kgMo-ZrO is obtained after mixing for 3 hours 2 Alloy powder; the Mo-ZrO 2 The alloy powder is subjected to cold isostatic pressing with a pressing pressure of 150 MPa and a holding time of 9 minutes; then, intermediate frequency sintering is carried out at a maximum sintering temperature of 1950 °C and a holding time of 5 hours to obtain 30.001 kg and a unit weight of 1.0 kg. 17mmMo-ZrO 2 Sintered alloy rod with a sintered density of 10.02g / cm 3 ;Take 10 pieces with a single weight of 1.0kg 17mmMo-ZrO 2 The 10.18kg sintered alloy rod is then sintered at 203 to open the billet, and heated in a hydrogen-protected muffle furnace at a temperature of 1450°C and a holding time of ...

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Abstract

The invention discloses a preparation method for molybdenum and zirconium alloy wire. The preparation method comprises the following steps: performing solid-solid mixing on pure molybdenum powder and zirconium oxide to obtain Mo-ZrO2 alloy powder; sequentially performing cold isostatic compaction, mid-frequency sintering, 203 rotary swaging and cogging, string hitting and drawing, so as to obtain the molybdenum and zirconium alloy wire. The molybdenum and zirconium alloy wire prepared by the method provided by the invention has high recrystallization temperature and good high-temperature ductility, is less susceptible to swirling, has good welding performance, is long in service life, simple in preparation method, and easy to operate, safe and reliable, has industrial popularization and application value, and is suitable for industrialized production.

Description

technical field [0001] The invention belongs to the technical field of alloy wire preparation, and relates to a method for preparing molybdenum-zirconium alloy wire. Background technique [0002] Molybdenum is a refractory metal with high high temperature strength, good electrical and thermal conductivity, low expansion coefficient and easy processing. It is used as grid and anode support materials in electron tubes. Molybdenum is used in ultra-large integrated circuits. Used as a metal halide semiconductor gate, mounting the integrated circuit on molybdenum can eliminate the "double metal effect". Due to the low recrystallization temperature of pure molybdenum wire, it is prone to embrittlement and fracture at high temperature, which affects the service life. Therefore, designing a metal wire with simple preparation process, high recrystallization temperature, good high temperature toughness and long service life has become a problem to be solved. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18C22C1/05C22C27/04
Inventor 卜春阳
Owner JINDUICHENG MOLYBDENUM CO LTD
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