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

Method for preparing molybdenum electrode rod by die forging method

A molybdenum electrode and die forging technology, applied in the field of material preparation, can solve the problems of shrinkage cavities, surface cracks, increased wire drawing burrs, etc., and achieve the effects of uniform quality, regular rod size, and no surface cracks.

Active Publication Date: 2015-07-29
JINDUICHENG MOLYBDENUM CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing molybdenum electrode rods by die forging, which solves the problem of unqualified flaw detection of molybdenum rod blanks in the prior art due to the mismatch between the specifications of the molybdenum rod blanks and the forging method, and the failure of forging. There are shrinkage cavities, increased burrs in subsequent drawing, and surface cracks

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The first step, the selection of molybdenum powder

[0021] The selected particle size is 3.2μm, and the loose ratio is 1.05g / cm 3 Molybdenum powder is used as raw material for die forging.

[0022] The second step is to press the billet

[0023] Put the molybdenum powder selected in the first step into a cylindrical mold, then put the molybdenum powder loaded mold into a cold isostatic press for pressing, and set the pressure of the cold isostatic press to 180Mpa for pressing. After pressing, hold the pressure for 8 minutes to obtain a molybdenum billet with a diameter of 55 mm;

[0024] The third step, sintering molybdenum billet

[0025] Put the two kinds of molybdenum rods prepared in the second step into the intermediate frequency furnace, fill the furnace with hydrogen, and then carry out segmental sintering. First, heat for 3 hours so that the furnace temperature rises from 20°C to 1000°C, and then keep it warm 1.5 hours; heat for 1.5 hours to 1250°C, hold fo...

Embodiment 2

[0030] The first step, the selection of molybdenum powder

[0031] The selected particle size is 3.9μm, and the loose ratio is 1.2g / cm 3 Molybdenum powder is used as raw material for die forging.

[0032] The second step is to press the billet

[0033] Put the molybdenum powder selected in the first step into a cylindrical mold, then put the molybdenum powder loaded mold into a cold isostatic press for pressing, and set the pressure of the cold isostatic press to 200Mpa for pressing. After pressing, hold the pressure for 15 minutes to obtain a molybdenum billet with a diameter of 90 mm;

[0034] The third step, sintering molybdenum billet

[0035] Put the two kinds of molybdenum rods prepared in the second step into the intermediate frequency furnace, fill the furnace with hydrogen, and then carry out segmental sintering. First, heat for 4 hours so that the furnace temperature rises from 20°C to 1000°C, and then keep it warm 2.5 hours; heat for 1.5 hours to 1250°C, hold fo...

Embodiment 3

[0040] The first step, the selection of molybdenum powder

[0041] The selected particle size is 3.5μm, and the loose ratio is 1.12g / cm 3 Molybdenum powder is used as raw material for die forging.

[0042] The second step is to press the billet

[0043] Put the molybdenum powder selected in the first step into a cylindrical mold, then put the molybdenum powder loaded mold into a cold isostatic press for pressing, and set the pressure of the cold isostatic press to 190Mpa for pressing. After pressing, hold the pressure for 10 minutes to obtain a molybdenum billet with a diameter of 120 mm;

[0044] The third step, sintering molybdenum billet

[0045] Put the two kinds of molybdenum rods prepared in the second step into the intermediate frequency furnace, fill the furnace with hydrogen, and then carry out segmental sintering. First, heat for 4 hours so that the furnace temperature rises from 20°C to 1000°C, and then keep it warm 2.5 hours; heat for 1.5 hours to 1250°C, hold ...

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
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for producing a molybdenum electrode bar by means of die forging. The method includes the steps of molybdenum powder selection, bar blank pressing, molybdenum bar blank sintering, and forging. The molybdenum electrode bar produced by the method is uniform in size and quality and free of burrs and surface cracks.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing a molybdenum electrode rod by a die forging method. Background technique [0002] There are two methods for making molybdenum electrode rods. The first method is to use sintered molybdenum rods as raw materials and adopt the air hammer die forging method; the second method is to use sintered molybdenum rods as raw materials and use precision forging machines for forging. [0003] The particle size and loose ratio of molybdenum powder are important parameters to determine the specifications of molybdenum powder. Molybdenum rods produced by molybdenum powders with different particle sizes and loose ratios have different physical properties, that is, molybdenum rods produced by molybdenum powders with different particle sizes and loose ratios Billet specifications are different. If the same forging method is used to produce molybdenum...

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 Patents(China)
IPC IPC(8): B23P15/00B22F3/16
Inventor 吴兴刚葛宽余惠保卫白秋平杨德武惠军胜苏晓曹维成任宝江仙彬华
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