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Preparation method of ultrathin Mo-Re alloy foil

An alloy foil, mo-re technology, applied in metal rolling and other directions, can solve the problems of poor surface quality, difficult processing, and easy wrinkling of the foil, and achieve good surface quality, low cost, and thin foil thickness. Effect

Inactive Publication Date: 2013-05-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the thickness of the foil is further reduced, especially when the thickness of the foil is less than 10 μm, it is very difficult to process, because the foil is easy to wrinkle and the surface quality is not good.

Method used

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  • Preparation method of ultrathin Mo-Re alloy foil
  • Preparation method of ultrathin Mo-Re alloy foil
  • Preparation method of ultrathin Mo-Re alloy foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A Mo-Re alloy foil material for electric vacuum prepared in this example, the alloy composition is: Re: 44.0wt%, and the balance is Mo.

[0037] Using Mo powder with a purity of ≥99.99% and an average particle size of 5-10 μm and Re powder with a purity of ≥99.99% and an average particle size of -4 Pa, the temperature is 700°C, and then the alloy powder is isostatically pressed, the pressure is 200MPa, the pressure is maintained for 10min, and then in H 2 Carry out a sintering in a protective environment, the sintering temperature is 1000°C, and the sintering time is 240min; the primary sintering blank is isostatically pressed at 600MPa, and after holding the pressure for 10min, the absolute vacuum degree is -4 Secondary sintering was carried out in the environment of Pa, the sintering temperature was 2000 ℃, and the sintering time was 600min, and the Mo-Re alloy ingot with a metallurgical bonding density of 95% was prepared.

[0038] After the Mo-Re sintered billet is c...

Embodiment 2

[0045] A Mo-Re alloy foil material for electric vacuum prepared in this embodiment, the alloy composition is: Re: 45.0wt%, and the balance is Mo.

[0046] Using Mo powder with a purity of ≥99.99% and an average particle size of 5-10 μm and Re powder with a purity of ≥99.99% and an average particle size of -4 Pa, the temperature is 725°C, and then the alloy powder is isostatically pressed, the pressure is 220MPa, the pressure is maintained for 12min, and then in H 2 The primary sintering is carried out in a protective environment, the sintering temperature is 1100°C, and the sintering time is 180min; the primary sintered blank is isostatically pressed at 620MPa, and the pressure is kept for 12min, and then the absolute vacuum degree is -4 Secondary sintering was carried out in the environment of Pa, the sintering temperature was 2200℃, and the sintering time was 680min, and the Mo-Re alloy ingot with a metallurgical bonding density of 92% was prepared. After the Mo-Re sintered b...

Embodiment 3

[0053] A Mo-Re alloy foil material for electric vacuum prepared in this example, the alloy composition is: Re: 47.5wt%, and the balance is Mo.

[0054] Using Mo powder with a purity of ≥99.99% and an average particle size of 5-10 μm and Re powder with a purity of ≥99.99% and an average particle size of -4 Pa, the temperature is 750°C, and then the alloy powder is isostatically pressed, the pressure is 240MPa, the pressure is maintained for 15min, and then in H 2 The primary sintering is carried out in a protective environment, the sintering temperature is 1200°C, and the sintering time is 120min; the primary sintered blank is isostatically pressed at 640MPa, and the pressure is maintained for 15min, and then the absolute vacuum degree is -4 The secondary sintering was carried out in Pa environment, the sintering temperature was 2400℃, and the sintering time was 720min, and the metallurgical bonded Mo-Re alloy ingot with a density of 90% was prepared.

[0055] After the Mo-Re si...

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Abstract

The invention provides a preparation method of an ultrathin Mo-Re alloy foil, and belongs to the technical field of Mo-Re alloy machining. The preparation method solves the problems that a Mo-Re alloy foil which is with the thickness smaller than 10 micrometers and good in surface quality is hard to prepare, and can be used for preparing the Mo-Re alloy foil which is with the thickness of 3-5 micrometers and good in surface quality. The preparation method comprises circulating operations of preparing an alloy billet with a powder metallurgy, cold rolling cogging, and cold rolling / vacuum annealing, and the method further comprises a step of annealing of a foil of 3-5 micrometers and other steps. The component range of a prepared alloy foil is, by weight, Re of 43.5-47.5%, and the balance is Mo. The thickness of the prepared alloy foil is 3-5 micrometers. The preparation method is simple in technology, the elastic coefficient of the prepared foil is 340-350 GPa, the tensile strength at 1200 DEG C is 220-260 Mpa, microhardness is 420-450 HV, the surface roughness (Rmax) is 0.02-0.05 micrometer, and the foil is suitable for platinotrons and travelling wave tubes and other vacuum components in aerospace equipment.

Description

technical field [0001] The invention relates to a preparation method of an ultra-thin Mo-Re alloy foil, belonging to the technical field of Mo-Re alloy processing. Background technique [0002] Molybdenum not only has excellent thermal conductivity, electrical conductivity, corrosion resistance, low expansion coefficient, low vapor pressure and other properties, but also has high hardness and high strength properties. Therefore, molybdenum has a very broad application in the fields of electronics industry and glass manufacturing industry. However, the plastic-brittle transition of molybdenum is a very important factor affecting its application. After rhenium is added to molybdenum, it improves the plasticity of molybdenum and also improves the strength of molybdenum, and greatly reduces the plastic-brittle transition temperature, so that the Mo-Re alloy has good low-temperature performance; at the same time, rhenium can improve The recrystallization temperature of molybden...

Claims

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Application Information

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IPC IPC(8): B21B1/40B21B3/00
Inventor 汪明朴陈畅李周谭望贾延琳王珊夏福中张真齐卫宏
Owner CENT SOUTH UNIV
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