Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Preparation method for molybdenum blank

A technology of molybdenum powder and green body, which is applied in the field of molybdenum plate preparation, can solve the problems of poor performance of molybdenum billets, and achieve the effects of reducing adverse effects, uniform density, and uniform structure

Active Publication Date: 2018-09-18
CHENGDU LIANHONG MOLYBDENUM IND CO LTD
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a method for preparing a molybdenum billet, which can effectively solve the problem of poor performance of the molybdenum billet prepared by the existing process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method for molybdenum blank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of molybdenum blank, comprising the following steps:

[0023] (1) Place the molybdenum powder with an average particle diameter of 4 μm in the steel mold, wherein the weight of the molybdenum powder with a particle diameter of 2 to 6 μm is 90% of the total molybdenum powder weight; Squeeze and hold the pressure for 16 minutes to prepare a green body with a thickness of 28mm and a relative density of 55%;

[0024] (2) Low-temperature sintering: place the prepared green body at 600°C for sintering, and keep it warm for 60 minutes;

[0025] (3) Medium-temperature sintering: after low-temperature sintering, raise the temperature to 1300°C at a heating rate of 4°C / min, carry out medium-temperature sintering, and keep it warm for 120 minutes;

[0026] (4) High-temperature sintering: after medium-temperature sintering, the temperature is raised to 1800°C at a heating rate of 4°C / min for high-temperature sintering, kept for 300 minutes, and finally cooled ...

Embodiment 2

[0028] (1) Put the molybdenum powder with an average particle diameter of 3 μm in the steel mold, wherein the weight of the molybdenum powder with a particle diameter of 2 to 6 μm is 95% of the total molybdenum powder weight; Squeeze and keep the pressure for 20 minutes to prepare a green body with a thickness of 25mm and a relative density of 60%;

[0029] (2) Low-temperature sintering: place the prepared green body at 1000°C for sintering, and keep it warm for 100 minutes;

[0030] (3) Medium-temperature sintering: After the low-temperature sintering is completed, the temperature is raised to 1700°C at a heating rate of 2°C / min, and the medium-temperature sintering is carried out and kept for 200 minutes;

[0031] (4) High-temperature sintering: after medium-temperature sintering, the temperature is raised to 2200°C at a heating rate of 2°C / min, then high-temperature sintering is carried out, and it is kept for 500 minutes, and finally cooled to room temperature to prepare h...

Embodiment 3

[0033] (1) the molybdenum powder that average grain size is 3.4 μm is placed in steel mold, and wherein, the weight of the molybdenum powder that grain size is 2~6 μm is 86% of total molybdenum powder weight; Under the condition of 300MPa, by hydraulic press It is pressed and held for 10 minutes to prepare a green body with a thickness of 35mm and a relative density of 58%;

[0034] (2) Low-temperature sintering: the prepared green body is sintered at 1200°C and kept for 120 minutes;

[0035] (3) Medium-temperature sintering: After the low-temperature sintering is completed, the temperature is raised to 1500°C at a heating rate of 6°C / min, and the medium-temperature sintering is carried out and kept for 240 minutes;

[0036] (4) High-temperature sintering: After the medium-temperature sintering, the temperature was raised to 2200°C at a heating rate of 6°C / min, then high-temperature sintering was carried out, and kept for 550 minutes, and finally cooled to room temperature to ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method for a molybdenum blank. The method comprises the following steps that (1), under the condition of 160-300 MPa, pressing is carried out on the molybdenum powder with the average particle size of 3-4 microns, moreover, the pressure is maintained for 3-20 minutes, and a green body is prepared; (2), low-temperature sintering is carried out; (3), medium-temperature sintering is carried out; and (4), high-temperature sintering is carried out, finally, cooling is carried out until the temperature reaches the room temperature, and the molybdenum blank is obtained. The molybdenum blank prepared by the preparation method is high in purity and uniform in tissue structure, and a prepared molybdenum foil is stable in performance.

Description

technical field [0001] The invention belongs to the technical field of molybdenum plate preparation, and in particular relates to a method for preparing a molybdenum billet. Background technique [0002] Because metal molybdenum foil has excellent properties such as high melting point, high strength, good electrical and thermal conductivity, and small thermal expansion coefficient, it is widely used in electronic components, electric light sources, precision analysis instruments, precision processing equipment, and medical equipment manufacturing. In these applications, the molybdenum foil is required to have uniform physical and chemical properties, and few surface and internal defects. However, the molybdenum billet produced by the existing process technology will have "peeling" on the surface of the processed metal molybdenum foil , "peeling", "pit" and other defects, and the flatness of the molybdenum foil is poor, and the performance is inconsistent, which eventually le...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/10
CPCB22F3/1017B22F2998/10B22F3/02
Inventor 范荣奎谢永华魏春肖
Owner CHENGDU LIANHONG MOLYBDENUM IND CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com