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

Special ceramic cutter material for crushing wire-board or circuit board and preparation method thereof

A technology of cutting tool material and ceramic cutting tool, applied in the field of special ceramic cutting tool material for circuit board or circuit board crushing and its preparation, can solve the problems of not suitable for crushing circuit board/circuit board crushing tool, serious wear, etc., and achieve low cost of raw materials , the effect of improving fracture toughness and simple preparation process

Inactive Publication Date: 2009-12-16
TSINGHUA UNIV
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material of the tool is Cr12 steel, and the tool will be severely worn after a few days of use, so it is not suitable for crushing circuit boards / circuit boards.

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

[0024] Example 1: The content of tungsten carbide is 77wt%, the content of whiskers is 0.5wt%, the content of titanium carbide is 18wt%, the content of carbon is 0.5wt%, the content of chromium compound is 2wt%, the content of lanthanum oxide is 0.4wt%, and the content of cerium oxide is 0.2wt%, the cobalt content is 0.4wt%, and the iron content is 1wt%. The uniform mixing time in the ball mill tank is 10 hours. After the raw materials are taken out, they are placed in the sample tank of the hot press machine and directly hot-pressed. The pressure during hot pressing is 18MPa, the hot pressing temperature is 1480°C, and the holding time is 25 minutes. The density of the finished tool is 9.1g / cm 3 , the hardness value is 20.86GPa, the fracture toughness is 8.25MPam 1 / 2 , the wear amount is 0.011mm / h (the wear amount of Cr12 steel under the same conditions is 0.06mm / h).

Embodiment 2

[0025] Example 2: tungsten carbide content is 75wt%, whisker content is 0.4wt%, titanium carbide content is 20wt%, carbon content is 0.6wt%, chromium-containing compound is 1.6wt%, lanthanum oxide content is 0.5wt%, cerium oxide The content is 0.3wt%, the cobalt content is 0.2wt%, and the iron content is 1.4wt%. The uniform mixing time in the ball mill tank is 12 hours. After the raw materials are taken out, they are placed in the sample tank of the hot press machine and directly hot-pressed. The pressure during hot pressing is 20 MPa, the hot pressing temperature is 1500° C., and the holding time is 30 minutes. The density of the finished tool is 8.9g / cm 3 , the hardness value is 22.86GPa, the fracture toughness is 8.67MPam 1 / 2 , the wear amount is 0.010mm / h (the wear amount of Cr12 steel under the same conditions is 0.06mm / h).

Embodiment 3

[0026] Example 3: The content of tungsten carbide is 65wt%, the content of whiskers is 0.4wt%, the content of titanium carbide is 30wt%, the content of carbon is 0.6wt%, the content of chromium-containing compound is 2wt%, the content of lanthanum oxide is 0.5wt%, and the content of cerium oxide is 0.1wt%, the cobalt content is 0.4wt%, and the iron content is 1wt%. The uniform mixing time in the ball mill tank is 10 hours. After the raw materials are taken out, they are placed in the sample tank of the hot press machine and directly hot-pressed. The pressure during hot pressing is 22MPa, the hot pressing temperature is 1580°C, and the holding time is 40 minutes. The density of the finished tool is 8.8g / cm 3 , the hardness value is 22.68GPa, the fracture toughness is 8.34MPam 1 / 2 , the wear amount is 0.008mm / h (the wear amount of Cr12 steel under the same conditions is 0.06mm / h).

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 sizeaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a special ceramic cutter material for circuit board powder or circuit board crushing and a preparation method thereof, belonging to the technical field of crushing equipment. The ceramic cutter uses whiskers as toughening material, tungsten carbide as base material, titanium carbide as wear-resistant agent, carbon as deoxidizer, chromium-containing compound, lanthanum oxide and cerium oxide as additives, and the above components are uniform After mixing, it is directly molded by hot pressing. After the raw materials are fully mixed, they are taken out and placed in the sample hot-pressing tank of the hot-pressing machine for direct hot-pressing. The pressure during hot-pressing is 10-40MPa, and the hot-pressing temperature is 1480-1600°C. The special tough ceramic cutter developed by the invention has good impact toughness, wear resistance and chemical stability, and simultaneously has high hardness. The tool material not only has a simple preparation process, but also has a production cycle much shorter than the conventional preparation method in which mixed raw materials are first pressed into shape and then sintered into shape. The cutter material is not only suitable for making special cutters for waste circuit boards / circuit board crushing equipment.

Description

technical field [0001] The invention relates to a special ceramic tool material for circuit board / circuit board / circuit board crushing with a whisker-toughened tungsten carbide matrix and a preparation method thereof, which can be used as a tool for scrapping circuit board / circuit board crushing equipment, and is suitable for other crushing equipment tool material. Background technique [0002] With the rapid growth of electronic waste, the recycling of waste printed circuit boards / circuit boards has become a topic of increasing concern. Shredding is an indispensable step in the mainstream recycling technology of waste printed circuit boards / circuit boards. Waste circuit boards / circuit boards have a plate-like structure, contain multiple components, have high toughness, are difficult to crush, and have serious tool wear. Therefore, circuit board / circuit board room temperature crushing technology has always been a hot topic of research. At present, there are no special kni...

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): C04B35/56C04B35/80C04B35/622
Inventor 李金惠杨连威刘华峰石丕星
Owner TSINGHUA UNIV
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