Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of large molybdenum rod blank

A molybdenum bar and large-scale technology, which is applied in the field of preparation of large-scale molybdenum bar billets, can solve the problems of uneven pressure on the billet, inability to manufacture large-scale molybdenum bar billets, and the molybdenum bar billet is small at the top and large at the bottom, so as to eliminate the uneven structure. Effect

Active Publication Date: 2013-06-26
JINDUICHENG MOLYBDENUM CO LTD
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing a large molybdenum billet. Through the special design of the pressing die, the problems of uneven compact dimensions and molybdenum billets that are prone to appear during the pressing process are solved. At the same time, the present invention The preparation method solves the problems that the existing technology cannot manufacture large-scale molybdenum billet and the billet is prone to uneven pressure, insufficient sintering of the product and uneven internal structure of the sintered product during the production 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 of large molybdenum rod blank
  • Preparation method of large molybdenum rod blank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The first step, jet mill treatment

[0033] Put the molybdenum powder into the fluidized bed jet mill for jet mill treatment, and set the air source pressure to 0.4MPa, so that the average particle size of the treated molybdenum powder is 3.0um, and the loose ratio is 1.2g / cm 3 ;

[0034] The second step, powder

[0035] Put the molybdenum powder treated in the first step into the mold, which is composed of a steel mold 1 and a latex rubber mold 3, the outer steel mold 1 and the inner latex rubber mold 3, and the latex rubber mold 3 is made of steel The mold 1 is fixed, wherein the inner diameter of the bottom of the steel mold 1 is 380mm, the inner diameter of the upper opening is 385mm, and the height is 1300mm; the inner diameter of the bottom of the latex rubber mold 3 is 360mm, the inner diameter of the upper opening is 365mm, and the height is 1500mm. Load 50kg of molybdenum powder each time, and after each powder loading, continuously vibrate and compact the mo...

Embodiment 2

[0043] The first step, jet mill treatment

[0044] Put the molybdenum powder into a fluidized bed jet mill for jet milling, and set the air source pressure to 0.45MPa, so that the average particle size of the treated molybdenum powder is 3.4um and the loose ratio is 1.75g / cm 3 ;

[0045]The second step, powder

[0046] Put the molybdenum powder treated in the first step into the mold, which is composed of a steel mold 1 and a latex rubber mold 3, the outer steel mold 1 and the inner latex rubber mold 3, and the latex rubber mold 3 is made of steel The mold 1 is fixed, wherein the inner diameter of the bottom of the steel mold 1 is 385mm, the inner diameter of the upper opening is 390mm, and the height is 1200mm; the inner diameter of the bottom of the latex rubber mold 3 is 365mm, the inner diameter of the upper opening is 370mm, and the height is 1400mm. Load 80kg of molybdenum powder each time, and after each powder loading, continuously vibrate and compact the mold contai...

Embodiment 3

[0054] The first step, jet mill treatment

[0055] Put the molybdenum powder into a fluidized bed jet mill for jet milling, and set the air source pressure to 0.4MPa, so that the average particle size of the treated molybdenum powder is 3.1um and the loose ratio is 1.5g / cm 3 ;

[0056] The second step, powder

[0057] Put the molybdenum powder treated in the first step into the mold, which is composed of a steel mold 1 and a latex rubber mold 3, the outer steel mold 1 and the inner latex rubber mold 3, and the latex rubber mold 3 is made of steel The mold 1 is fixed, wherein the inner diameter of the bottom of the steel mold 1 is 380mm, the inner diameter of the upper opening is 385mm, and the height is 1100mm; the inner diameter of the bottom of the latex rubber mold 3 is 360mm, the inner diameter of the upper opening is 365mm, and the height is 1300mm. Load 60kg of molybdenum powder each time, and after each powder loading, continuously vibrate and compact the mold contain...

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
diameteraaaaaaaaaa
lengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a large molybdenum rod blank. The preparation method of the large molybdenum rod blank comprises airflow grinding treatment, powder loading, molybdenum pressed rod blank preparation and molybdenum rod blank preparation. Piece weight of produced molybdenum rod blank reaches more than 500kg, and dimensions of finished products are that the molybdenum rod blank is 250-1200mm in diameter and 200-1500mm in length. The preparation method of the large molybdenum rod blank eliminates the defects of nonuniform texture and interior crack.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing a large molybdenum billet. Background technique [0002] Because of its high melting point (2630°C), good electrical and thermal conductivity, small expansion coefficient, high temperature strength and good glass corrosion resistance, molybdenum has been widely used as an electrode for melting high-grade optical glass, glass fiber, and refractory rock wool for many years. Materials, molybdenum electrode materials are firstly prepared from molybdenum material into molybdenum billet. At present, there are two main methods for preparing molybdenum billet: powder metallurgy method and electron beam melting method. [0003] The process of the sintering section of the powder metallurgy method is to put the molybdenum powder into the rubber film and seal it, and then shape it into a billet with a certain strength in the cold isostatic pres...

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): B22F3/03B22F3/04
Inventor 曹维成黄晓玲史振琦张焜薛夏英葛宽余白秋平何晓红王岗吴亚利
Owner JINDUICHENG MOLYBDENUM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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