A kind of pre-alloyed powder for diamond sawing tool

Abstract

The invention discloses prealloyed powder for diamond sawing tools. The prealloyed powder, disclosed by the invention, comprises the following components in percentage by weight: 20-25% of Cu, 5-10% of Co, 1-3% of Ni, 3-6% of Cr, and the rest amount of Fe. As raw materials of carcasses for the diamond sawing tools, the prealloyed powder has the advantages of low oxygen content, fine granularity, uniform and segregation-free components, irregular particle morphology, difficult secondary oxidation, difficult agglomeration and full alloying; and the obtained carcasses are uniform in structure, high in hardness and impact strength, and are good in mechanical control of diamond.

Description

technical field

[0001] The invention relates to the field of powder metallurgy, in particular to a pre-alloyed powder for diamond sawing tools. Background technique

[0002] In the diamond tool industry, the matrix material is generally obtained by mechanically mixing various single-element metal powders (such as iron powder, copper powder, cobalt powder, etc.). Poor, high sintering temperature is required, the composition of the diamond tool matrix obtained by this method is not uniform, and complete alloying cannot be achieved. In order to overcome the above shortcomings and improve the performance of the diamond tool matrix, raw material powder manufacturers began to study pre-alloyed powders The powder is evenly distributed than the mechanically mixed powder, which fundamentally avoids component segregation, makes the matrix structure uniform, and the performance tends to be consistent. At the same time, pre-alloying greatly reduces the activation energy required for the...

Examples

Embodiment 1

[0038] A pre-alloyed powder for diamond sawing tools, the weight percent composition of each component of the pre-alloyed powder is: Cu20%, Co5%, Ni1%, Cr3%, Fe71%.

[0039] Such as figure 1 Shown, the preparation method of described pre-alloyed powder comprises the following steps:

[0040] (1) Put the raw materials into the electric furnace according to the ratio, heat up and melt, and keep the molten metal at 1600°C for 5 minutes.

[0041] (2) Then the molten metal flows down through the leakage hole at the bottom of the leakage bag 1 at a flow rate of 60kg / min. The molten metal flow 2 passes through the pulsed magnetic field 3 and the annular spray plate 4 from top to bottom in sequence, and the nozzle 5 of the annular spray plate 4 sprays The high-pressure water flow crushes the metal liquid flow 2 to form metal powder and enters the atomizing barrel 6, which is filled with nitrogen gas for gas protection.

[0042] The pulse generation voltage of the pulsed magnetic fie...

Embodiment 2

[0048] A pre-alloyed powder for diamond sawing tools, the weight percent composition of each component of the pre-alloyed powder is: Cu25%, Co10%, Ni3%, Cr6%, Fe56%.

[0049] Such as figure 1 Shown, the preparation method of described pre-alloyed powder comprises the following steps:

[0050] (1) Put the raw materials into the electric furnace according to the ratio, heat up and melt, and keep the molten metal at 1650°C for 1min.

[0051] (2) Then the molten metal flows down through the leakage hole at the bottom of the leakage bag 1 at a flow rate of 80kg / min. The molten metal flow 2 passes through the pulsed magnetic field 3 and the annular spray plate 4 from top to bottom in sequence, and the nozzle 5 of the annular spray plate 4 sprays The high-pressure water flow crushes the metal liquid flow 2 to form metal powder and enters the atomizing barrel 6, which is filled with nitrogen gas for gas protection.

[0052] The pulse generation voltage of the pulsed magnetic field i...

Embodiment 3

[0058] A pre-alloyed powder for diamond sawing tools, the weight percentage of each component of the pre-alloyed powder is composed of: Cu22%, Co8%, Ni2%, Cr4%, Fe64%.

[0059] Such as figure 1 Shown, the preparation method of described pre-alloyed powder comprises the following steps:

[0060] (1) Put the raw materials into the electric furnace according to the ratio, heat up and melt, and keep the molten metal at 1620°C for 3 minutes.

[0061] (2) Then the molten metal flows down through the leakage hole at the bottom of the leakage bag 1 at a flow rate of 70kg / min. The molten metal flow 2 passes through the pulsed magnetic field 3 and the annular spray plate 4 sequentially from top to bottom, and the nozzle 5 of the annular spray plate 4 sprays The high-pressure water flow crushes the metal liquid flow 2 to form metal powder and enters the atomizing barrel 6, which is filled with nitrogen gas for gas protection.

[0062] The pulse generation voltage of the pulsed magnetic...

technical field

[0001] The invention relates to the field of powder metallurgy, in particular to a pre-alloyed powder for diamond sawing tools. Background technique

[0002] In the diamond tool industry, the matrix material is generally obtained by mechanically mixing various single-element metal powders (such as iron powder, copper powder, cobalt powder, etc.). Poor, high sintering temperature is required, the composition of the diamond tool matrix obtained by this method is not uniform, and complete alloying cannot be achieved. In order to overcome the above shortcomings and improve the performance of the diamond tool matrix, raw material powder manufacturers began to study pre-alloyed powders The powder is evenly distributed than the mechanically mixed powder, which fundamentally avoids component segregation, makes the matrix structure uniform, and the performance tends to be consistent. At the same time, pre-alloying greatly reduces the activation energy required for the...

Examples

Embodiment 1

[0038] A pre-alloyed powder for diamond sawing tools, the weight percent composition of each component of the pre-alloyed powder is: Cu20%, Co5%, Ni1%, Cr3%, Fe71%.

[0039] Such as figure 1 Shown, the preparation method of described pre-alloyed powder comprises the following steps:

[0040] (1) Put the raw materials into the electric furnace according to the ratio, heat up and melt, and keep the molten metal at 1600°C for 5 minutes.

[0041] (2) Then the molten metal flows down through the leakage hole at the bottom of the leakage bag 1 at a flow rate of 60kg / min. The molten metal flow 2 passes through the pulsed magnetic field 3 and the annular spray plate 4 from top to bottom in sequence, and the nozzle 5 of the annular spray plate 4 sprays The high-pressure water flow crushes the metal liquid flow 2 to form metal powder and enters the atomizing barrel 6, which is filled with nitrogen gas for gas protection.

[0042] The pulse generation voltage of the pulsed magnetic fie...

Embodiment 2

[0048] A pre-alloyed powder for diamond sawing tools, the weight percent composition of each component of the pre-alloyed powder is: Cu25%, Co10%, Ni3%, Cr6%, Fe56%.

[0049] Such as figure 1 Shown, the preparation method of described pre-alloyed powder comprises the following steps:

[0050] (1) Put the raw materials into the electric furnace according to the ratio, heat up and melt, and keep the molten metal at 1650°C for 1min.

[0051] (2) Then the molten metal flows down through the leakage hole at the bottom of the leakage bag 1 at a flow rate of 80kg / min. The molten metal flow 2 passes through the pulsed magnetic field 3 and the annular spray plate 4 from top to bottom in sequence, and the nozzle 5 of the annular spray plate 4 sprays The high-pressure water flow crushes the metal liquid flow 2 to form metal powder and enters the atomizing barrel 6, which is filled with nitrogen gas for gas protection.

[0052] The pulse generation voltage of the pulsed magnetic field i...

Embodiment 3

[0058] A pre-alloyed powder for diamond sawing tools, the weight percentage of each component of the pre-alloyed powder is composed of: Cu22%, Co8%, Ni2%, Cr4%, Fe64%.

[0059] Such as figure 1 Shown, the preparation method of described pre-alloyed powder comprises the following steps:

[0060] (1) Put the raw materials into the electric furnace according to the ratio, heat up and melt, and keep the molten metal at 1620°C for 3 minutes.

[0061] (2) Then the molten metal flows down through the leakage hole at the bottom of the leakage bag 1 at a flow rate of 70kg / min. The molten metal flow 2 passes through the pulsed magnetic field 3 and the annular spray plate 4 sequentially from top to bottom, and the nozzle 5 of the annular spray plate 4 sprays The high-pressure water flow crushes the metal liquid flow 2 to form metal powder and enters the atomizing barrel 6, which is filled with nitrogen gas for gas protection.

[0062] The pulse generation voltage of the pulsed magnetic...

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