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Formula and manufacturing method for special diamond tool bit

A diamond tool and diamond technology are applied in the field of formula and preparation of special diamond tool bits to achieve good wrapping effect, improve wrapping effect and improve utilization rate.

Active Publication Date: 2013-03-20
JIANGXI JIANDE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Formula and manufacturing method for special diamond tool bit

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Experimental program
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Effect test

Embodiment 1

[0022] The first step is to put the 300-mesh coarse cobalt powder and small steel balls together in the three-dimensional mixer and mix for 30 minutes to restore the cobalt powder to the loose state before vacuum packaging;

[0023] In the second step, the diamond is subjected to titanium-coating treatment; the diamond is 85%, the titanium powder is 15%, and heated to 800 degrees under vacuum conditions to react. The treated titanium-coated diamond accounts for 99.7% of diamond and 0.3% of titanium powder. %;

[0024] The third step is to mix the titanium-coated diamond and pure cobalt powder according to the weight ratio: titanium-coated diamond accounts for 10%, and cobalt powder accounts for 90%;

[0025] The fourth step is to use a three-dimensional mixer to fully stir and mix the added titanium-coated diamond and cobalt powder for 30 minutes;

[0026] The fifth step is to cold press the mixed material with a cold press; cold press at room temperature and use a pressure o...

Embodiment 2

[0030] The first step is to put the 250-mesh coarse cobalt powder and small steel balls together in the three-dimensional mixer and mix for 35 minutes to restore the cobalt powder to the loose state before vacuum packaging;

[0031] In the second step, the diamond is subjected to titanium-coating treatment; the diamond is 80%, the titanium powder is 20%, and heated to 780 degrees under vacuum conditions for reaction. The treated titanium-coated diamond accounts for 99.8% of diamond and 0.2% of titanium powder. %;

[0032] The third step is to mix the titanium-coated diamond and pure cobalt powder according to the weight ratio: titanium-coated diamond accounts for 8%, and cobalt powder accounts for 92%;

[0033] The fourth step is to use a three-dimensional mixer to fully stir and mix the added titanium-coated diamond and cobalt powder for 45 minutes;

[0034] The fifth step is to cold press the mixed material with a cold press; cold press at room temperature and use a pressur...

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Abstract

The invention discloses a formula and a manufacturing method for a special diamond tool bit. The manufacturing method is characterized by comprising the following steps: recovering rough cobalt powder of 250-300 meshes to be in a loose state; carrying out titanium plating treatment on a diamond; heating 80-85% of the diamond and 20-15% of titanium powder to 780-800 DEG C under the vacuum conditions for reaction, wherein the treated titanium-plated diamond contains 99.7-99.8% of the diamond and 0.2-0.3% of the titanium powder; uniformly mixing 8-10% of the titanium-plated diamond with 92-90% of the cobalt powder; fully stirring and mixing for 30-45 min by a three-dimensional mixing machine; pressing under a pressure of 80-100 KN at the normal temperature; and hotly pressing and forming by a vacuum hot pressing sintering machine, wherein the highest hot pressing temperature is 820 DEG C, the maximum pressure is 200 KN, and the heat preservation and pressure maintenance time is 1-3 min. Through experimental detection, the Vickers hardness of the tool bit reaches 95-98 and the bending resistance of a matrix is 1211.9 MPa. The holding force of the matrix on the diamond is remarkably larger than that of the conventional single-metal powder or multi-metal mixed powder matrix on the diamond, the utilization rate of the diamond is effectively increased, and the sharpness and the wear resistance of a diamond tool are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of cutting tools, and relates to a formula and a production process of a diamond tool bit in powder metallurgy, in particular to a formula and a preparation method of a special diamond tool bit. Background technique [0002] There are many types of diamond tool tooth formulations, which can be roughly divided into: ceramic diamond-like tools, stone diamond-like tools, and concrete diamond-like tools. The existing diamond tool cutter head formula mainly adopts the mixture of various elemental metal powders, such as copper powder, iron powder, tin powder, nickel powder, zinc powder, tungsten carbide powder, chromium powder, titanium powder, or pre-alloyed powder Unlike copper-iron alloys, copper-zinc alloys are not mixed with elemental metal powders. After mixing, add diamond and stir evenly, put it into a hot-press sintering machine, and form it through high temperature and high pressure. The diamond cutter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/16
Inventor 王海龙
Owner JIANGXI JIANDE IND
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