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Vacuum sintering process for hard alloy sawteeth

A cemented carbide and vacuum sintering technology, which is applied in the field of cemented carbide, can solve the problems affecting the performance of cemented carbide sawtooth products, and the sintered filler is not stable enough, and achieves the effects of good sintering effect, small porosity and uniform heat conduction.

Active Publication Date: 2020-06-23
OKE PRECISION CUTTING TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the mixed powder of alumina and carbon black is usually used as the sintered filler. This sintered filler is not stable enough under vacuum conditions, and it is easy to react with the cemented carbide, which affects the performance of the final cemented carbide saw tooth product.

Method used

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  • Vacuum sintering process for hard alloy sawteeth
  • Vacuum sintering process for hard alloy sawteeth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a cemented carbide sawtooth vacuum sintering process, which specifically includes the following steps;

[0030] S1. Mix the tungsten carbide sawtooth blank and the sintered filler with a particle size of 80 mesh evenly. The sintered filler used is obtained by mixing the following components: titanium carbide powder: 89%, zirconia powder: 5%, alumina powder 5%, carbon Black: 1%. After mixing evenly, each cemented carbide sawtooth blank is wrapped by sintered material without contact with each other, and then put into a graphite boat, and the cemented carbide sawtooth blank is not in contact with the graphite boat;

[0031] S2. Put the graphite boat containing the mixed material into a vacuum sintering furnace for sintering. The sintering process parameters are as follows: the temperature is 1400° C., and the time is 120 minutes;

[0032] S3. Sieve the sintered material in the graphite boat through a 20-mesh vibrating sieve to obtain cemented carb...

Embodiment 2

[0034] This embodiment provides a cemented carbide sawtooth vacuum sintering process, which specifically includes the following steps;

[0035] S1. Mix the tungsten carbide sawtooth blank and the sintered filler with a particle size of 60 mesh evenly. The sintered filler used is obtained by mixing the following components: titanium carbide powder: 89%, zirconia powder: 1%, alumina powder 9%, carbon Black: 1%. After mixing evenly, each cemented carbide sawtooth blank is wrapped by sintered material without contact with each other, and then put into a graphite boat, and the cemented carbide sawtooth blank is not in contact with the graphite boat;

[0036] S2. Put the graphite boat containing the mixed material into a vacuum sintering furnace for sintering. The sintering process parameters are as follows: the temperature is 1450° C., and the time is 60 minutes;

[0037] S3. Sieve the sintered material in the graphite boat through a 20-mesh vibrating sieve to obtain cemented carbi...

Embodiment 3

[0039] This embodiment provides a cemented carbide sawtooth vacuum sintering process, which specifically includes the following steps;

[0040] S1. Mix the cemented carbide sawtooth blank and sintered filler with a particle size of 40 mesh evenly. The sintered filler used is obtained by mixing the following components: titanium carbide powder: 89%, zirconia powder: 9%, alumina powder 1%, carbon Black: 1%. After mixing evenly, each cemented carbide sawtooth blank is wrapped by sintered material without contact with each other, and then put into a graphite boat, and the cemented carbide sawtooth blank is not in contact with the graphite boat;

[0041] S2. Put the graphite boat containing the mixed material into a vacuum sintering furnace for sintering. The sintering process parameters are as follows: the temperature is 1400° C., and the time is 80 minutes;

[0042] S3. Sieve the sintered material in the graphite boat through a 20-mesh vibrating sieve to obtain cemented carbide s...

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Abstract

The invention discloses a vacuum sintering process for hard alloy sawteeth. Hard alloy sawtooth blanks are wrapped with sintering filler, the space between the hard alloy sawtooth blanks and the spacebetween the hard alloy blanks and a graphite boat are filled with the sintering filler, bonding can be avoided, and the sintering yield is increased. The sintering filler adopted in the process is stable in property and cannot react with the hard alloy blanks during vacuum sintering. During vacuum sintering, a sintering groove does not need to be formed, the containing space of the boat can be fully utilized, the hard alloy sawtooth blanks and the sintering filler are loaded as much as possible, the production efficiency is high, and popularization is convenient. The hard alloy sawtooth product prepared through the process is high in hardness, good in bending strength and capable of well meeting the cutting requirement.

Description

technical field [0001] The invention relates to the technical field of cemented carbide, and more particularly, relates to a cemented carbide sawtooth vacuum sintering process. Background technique [0002] Tungsten carbide sawtooth, as a cemented carbide tool product, is specially made for cutting and grooving metal materials, and is a common cutting tool for processing. For cemented carbide sawtooth, its cutting performance mainly depends on the quality of cemented carbide. [0003] The manufacturing process of cemented carbide sawtooth mainly includes the steps of mixture preparation, molding and sintering. The sintering process is sintered in a vacuum sintering furnace. In order to prevent cemented carbide sawtooth blanks from sticking to each other during sintering, the pressed hard alloy sawtooth blanks are usually placed on a sintering boat provided with sintering grooves for sintering. For example, a utility model patent with the publication number CN207035826U disc...

Claims

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Application Information

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IPC IPC(8): B22F3/10B22F5/08
CPCB22F3/1003B22F5/08
Inventor 苏振华黄法袁美和
Owner OKE PRECISION CUTTING TOOLS CO LTD
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