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

A technology of ceramic cutters and cutter materials, which is applied in the field of special ceramic cutter materials for circuit board or circuit board crushing and its preparation, which can solve the problems of not suitable for crushing circuit boards/circuit board crushing cutters, severe wear, etc., and achieve low raw material cost , Improve fracture toughness, simple preparation process

Inactive Publication Date: 2008-04-09
TSINGHUA UNIV
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  • 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

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 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

[0024] 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

[0025] 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).

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Abstract

The invention discloses a ceramic cutting tool and the preparation method thereof special for a smashing line board or a circuit board, and belongs to the art of the smashing equipment. The ceramic cutting tool takes crystal whisker as the plasticizing material; tungsten carbide as the substrate material; titanium carbide as anti-friction agent; carbon as deoxidizing agent; and chromic compound, lanthanum oxide and cerium oxide as additive. The ingredients are evenly blended and directly molded by heat pressing. The raw material is not taken out until being fully mixed, and is then positioned into the sample heat pressing groove of a hot-press machine. The thermo-compression intensity of pressure is 10-40MPa, and the hot-press temperature ranges from 1,480 to 1,600DEG C. The flexible ceramic cutting tool of the invention is provided with good resilience, wearlessness, high rigidity and chemical stability. The technique of the cutting tool is quite simple and the production period is far shorter than the production period of the conventional preparation method that carries the compression molding of the evenly mixed raw materials first and then the sinter molding. The cutting tool material is fit for the cutting tool special for the making of a waste line board and the smashing equipment of the circuit board.

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

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Application Information

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IPC IPC(8): C04B35/56C04B35/80C04B35/622
Inventor 李金惠杨连威刘华峰石丕星
Owner TSINGHUA UNIV
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