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Preparation method of iron-based diamond tool material without graphitizing conversion

A tool material, graphitization technology, applied in diamond and other directions, can solve the problem of difficult to effectively overcome diamond graphitization and other problems

Active Publication Date: 2019-01-18
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the past, it was difficult to effectively overcome diamond graphitization by simply adjusting the preparation process, atmosphere, diamond surface metallization and component optimization.

Method used

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  • Preparation method of iron-based diamond tool material without graphitizing conversion

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preparation example Construction

[0022] A kind of preparation method of iron-based diamond tool material of the present invention, comprises the following steps:

[0023] (1) Weigh iron powder, copper-tin alloy powder, and silicon powder according to the mass percentage of 84~91:7~13:2~6, homogenize them with an electric drive grinder, and the spindle speed is 120 rpm, and then place them on the surface Surface ionization is carried out in a high-energy device, the surface ionization beam is helium plasma, and the ionization time is 1.5 to 3.4 hours to obtain iron-based alloy powder;

[0024] (2) The diamond powder is purified, boiled, and rapidly quenched. The potassium phosphate aqueous solution with a concentration of 2.5-3.7mol / L is used for the boiling treatment. The instantaneous temperature spray quenching equipment is used for the rapid quenching treatment. The heating rate is 200°C / min, and the temperature is lowered. The speed is 670°C / min, and then crushed in a high-impact shearing machine. The pun...

Embodiment 1

[0028] (1) Weigh iron powder, copper-tin alloy powder, and silicon powder according to the mass percentage of 84:10:6, homogenize them with an electric drive grinder, and the spindle speed is 120 rpm, and then place them in a surface high-energy device for surface treatment. Ionization, the surface ionization beam is helium plasma, the ionization time is 1.5 hours, and the iron-based alloy powder is obtained;

[0029] (2) The diamond powder is purified, boiled, and quenched. The potassium phosphate aqueous solution with a concentration of 2.5mol / L is used for the boiling treatment. The quenching treatment adopts an instantaneous temperature spray quenching equipment. The heating rate is 200°C / min, and the cooling rate is 670 ℃ / min, then crushed in a high-impact shearing machine, the punch frequency of high-impact shearing and crushing is 140, and polygonal diamond powder is obtained;

[0030] (3) Weigh iron-based alloy powder and polygonal diamond powder according to the mass ...

Embodiment 2

[0032] (1) Weigh iron powder, copper-tin alloy powder, and silicon powder according to the mass percentage of 87:9:4, homogenize them with an electric drive grinder, and the spindle speed is 120 rpm, and then place them in a surface high-energy device for surface Ionization, the surface ionization beam is helium plasma, the ionization time is 1.8 hours, and the iron-based alloy powder is obtained;

[0033] (2) The diamond powder is purified, boiled, and quenched. The potassium phosphate aqueous solution with a concentration of 2.7mol / L is used for the boiling treatment. The quenching treatment adopts an instantaneous temperature spray quenching equipment, with a heating rate of 200°C / min and a cooling rate of 670 ℃ / min, and then crushed in a high-impact shearing machine, the punch frequency of high-impact shear crushing is 160, and polygonal diamond powder is obtained;

[0034] (3) Weigh iron-based alloy powder and polygonal diamond powder according to the mass percentage of 9...

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Abstract

The invention discloses a preparation method of an iron-based diamond tool material without graphitizing conversion. The preparation method comprises the steps: firstly, homogenizing and surface ionizing iron powder, copper-tine alloy powder and silicon powder to prepare iron-based alloy powder; then obtaining polygonal diamond powder through diamond breaking treatment; evenly mixing the two kindsof powder and firing and shaping under the weak reduction atmosphere; finally, obtaining the iron-based diamond tool material without graphitizing conversion. The method has the advantages of high ingredient control accuracy, stronger technology stability and repeatability and ability in achieving toughness, stable interfaces without graphization and long service life of iron-based diamond cutters.

Description

technical field [0001] The invention relates to the technical field of superhard tool preparation, in particular to a method for preparing a non-graphitization transition iron-based diamond tool material. Background technique [0002] The interface diamond graphitization of iron-based diamond tools is the key to restrict its performance. In the past, it was difficult to effectively overcome diamond graphitization simply by adjusting the preparation process, atmosphere, diamond surface metallization and component optimization. Therefore, it is very important to find a new way to reduce the graphitization rate of diamond and stabilize the interface. [0003] Through surface ionization of matrix powder, diamond polygonalization, and micro-reduction treatment, giving full play to the advantages of diamond superhard wear resistance and iron-based metal matrix strength and toughness is a key means to solve the graphitization of iron-based diamond tool interfaces. Contents of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/16C22C38/02C22C26/00C22C33/02C01B32/25
CPCC01B32/25C22C26/00C22C33/0278C22C38/008C22C38/02C22C38/16
Inventor 董洪峰艾桃桃李文虎王永善
Owner SHAANXI SCI TECH UNIV
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