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A kind of preparation method of molybdenum-zirconium alloy wire

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

Active Publication Date: 2016-02-10
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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  • A kind of preparation method of molybdenum-zirconium alloy wire

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preparation example Construction

[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 through solid-solid doping to obtain Mo-ZrO 2 Alloy powder, the amount of zirconium dioxide added is 0.01 to 0.8% of the mass of pure molybdenum powder; Mo-ZrO 2 The alloy powder is formed by cold isostatic pressing, the pressure is 150-200MPa, and the pressure-holding time is 8-10min; then after intermediate frequency sintering, the highest temperature is 1900-1980℃, and the holding time is 4-6 hours; after 203 rotary forging The blanking is carried out in a muffle furnace with hydrogen protection, the temperature is 1400~1450℃, the holding time is 40~60min, and finally after stringing and drawing, the on-line heating temperature of stringing is 1100±50℃ to obtain molybdenum Zirconium alloy wi...

Embodiment 1

[0016] Weigh the average Fibonacci particle size as 2.9μm, and the bulk density as 1.15g / cm 3 Of pure molybdenum powder 30kg, 90g analytical pure ZrO 2 Powder, pure molybdenum powder and ZrO 2 The powder is put into the three-dimensional motion mixer for solid-solid doping, and 30.09kg Mo-ZrO is obtained after 3 hours of mixing 2 Alloy powder; Mo-ZrO 2 The alloy powder is formed by cold isostatic pressing, the pressing pressure is 180MPa, and the holding time is 8min; then the intermediate frequency sintering is carried out, the highest sintering temperature is 1930℃, 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 each weighing 1.0kg 17mmMo-ZrO 2 The 10.06kg of sintered alloy rod is then forged by 203 to open the billet. It is heated in a muffle furnace protected by hydrogen at a temperature of 1420℃ and a holding time of 60min to obtain 9.75kg 8.0mmMo-ZrO 2 Allo...

Embodiment 2

[0018] Weigh the average Fibonacci particle size as 2.5μm and the bulk density as 1.20g / cm 3 Of pure molybdenum powder 30kg, 3g analytical pure ZrO 2 Powder, pure molybdenum powder and ZrO 2 The powder is put into the three-dimensional motion mixer for solid-solid doping, and 30.003kg Mo-ZrO is obtained after 3 hours of mixing 2 Alloy powder; Mo-ZrO 2 The alloy powder is formed by cold isostatic pressing, the pressing pressure is 150MPa, and the pressure holding time is 9min; then the intermediate frequency sintering is carried out, the highest sintering temperature is 1950℃, and the holding time is 5 hours, to obtain 30.001kg with a unit weight of 1.0kg 17mmMo-ZrO 2 Sintered alloy rod with a sintered density of 10.02g / cm 3 ; Take 10 pieces each weighing 1.0kg 17mmMo-ZrO 2 The sintered alloy rod 10.18kg is then subjected to 203 rotary forging to open the billet. It is heated in a muffle furnace with hydrogen protection at a temperature of 1450℃ and a holding time of 50min to obta...

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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 a 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 a grid and anode support material in electron tubes. Molybdenum is used in ultra-large integrated circuits. Used as a metal salt semiconductor gate, the "bimetal effect" can be eliminated by mounting integrated circuits on molybdenum. Due to the low recrystallization temperature of pure molybdenum wire, it is prone to embrittlement and fracture at high temperature, which affects its service life. Therefore, designing a metal wire with simple preparation process, high recrystallization temperature, good high temperature toughness, and long service life becomes a problem to be solved. Summary of the invention [0003...

Claims

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Application Information

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