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
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[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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