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Preparation method for modified superfine low-oxygen water-atomized alloy powder used for diamond tool

A technology for diamond tools and alloy powder is applied in the field of preparation of modified ultra-fine low-oxygen water atomized alloy powder for diamond tools, which can solve the problems of low tool processing efficiency and high wear resistance, and achieve low oxygen content and service life. The effect of improving and improving the processing efficiency

Active Publication Date: 2016-03-30
TIZ ADVANCED ALLOY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite formula of Fe, Ni, Cu, Sn and other elements has high cost performance in the field of diamond tools, but the bending strength of the sintered body is about 1400MPa; when used to process relatively soft and some medium-hard objects, It often occurs that the wear resistance is too high so that after the exposed diamond is broken, the carcass fails to wear synchronously with the diamond, resulting in low tool processing efficiency; especially by smelting pre-alloyed water atomized powder, this defect is manifested more obvious; for this problem, increasing the brittle phase in the carcass is an effective method

Method used

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  • Preparation method for modified superfine low-oxygen water-atomized alloy powder used for diamond tool
  • Preparation method for modified superfine low-oxygen water-atomized alloy powder used for diamond tool
  • Preparation method for modified superfine low-oxygen water-atomized alloy powder used for diamond tool

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0021] The order of adding raw materials is as follows:

[0022] Step 1: Add pure iron, insert a Ni plate in the middle of the pure iron, control the power at 230KW, and start melting.

[0023] The second step: when melting more than half, add Cu plate.

[0024] Step 3: Add Si and Sn ingots after the Cu plate is melted.

[0025] Step 4: Add Cr ingot, Ti plate, La and Y powder

[0026] After the raw materials are melted, cover the surface of the molten metal with lime. After 10 minutes, the lime melts and starts to remove slag. Measure the temperature of the melt. When the temperature reaches 1580°C, start the high-pressure water pump, fill the atomization barrel with nitrogen, adjust the atomization pressure to 100MPa, pour the melt into the middle leak bag and start atomization. The atomized water-powder mixture is sealed and pressurized in the powder-collecting tank, and a 1200-mesh filter cloth is installed at the water outlet at the bottom of the powder-collectin...

specific Embodiment approach 2

[0029] Use an intermediate frequency induction smelting furnace with a furnace capacity of 250kg for industrial production. The furnace lining is made of magnesia. The raw materials and weights used are as follows in Table 3:

Embodiment approach 2

[0031]

[0032] The order of adding raw materials is the same as Embodiment 1.

[0033]After the raw materials are melted, cover the surface of the molten metal with lime. After 10 minutes, the lime melts and starts to remove slag. Measure the temperature of the melt. When the temperature reaches 1600°C, start the high-pressure water pump, fill the atomization barrel with nitrogen, adjust the atomization pressure to 110MPa, pour the melt into the middle leak bag and start atomization. The atomized water-powder mixture is sealed and pressurized in the powder-collecting tank, and a 1200-mesh filter cloth is installed at the water outlet at the bottom of the powder-collecting tank, and the pressure is kept at 0.5 MPa until no obvious water-vapor mixture is discharged from the water outlet. First put the dehydrated wet powder into the dryer, seal the powder loading port, start the vacuum pump, start the power switch to make the dryer rotate vertically in one direction, and then...

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Abstract

The invention discloses a preparation method for modified superfine low-oxygen water-atomized alloy powder used for a diamond tool. The alloy matrix powder for a tool bit of the diamond tool can be manufactured through the method. The preparation method has the characteristics that the alloy powder is modified by adding multiple strengthening elements and the bending strength of a sintered matrix is improved at the same time; the superfine-grained alloy powder is manufactured through an ultrahigh-pressure water atomization technology, the alloy powder sintering compaction is lowered while the composition uniformity of single powder; the low-oxygen-content alloy powder is obtained through control over a smelting technique and a reduction technique, and the compactness of the sintered matrix is improved.

Description

technical field [0001] The invention belongs to the field of powder metallurgy, and relates to a preparation method of modified ultrafine low-oxygen water atomized alloy powder for diamond tools. Its characteristics are that the oxygen content is lower than 2000ppm, the D50 is 3-8 microns, spherical particles, and the powder particle size is normally distributed. Modified by carbide forming elements and rare earth elements, the alloy has higher bending strength and diamond holding power. Background technique [0002] Diamond tools are widely used in the processing of hard and brittle materials such as stone, building materials, refractory materials, ceramics, semiconductors, magnetic materials, and composite materials. Sintered manufacturing. [0003] The wear resistance of the carcass formed by binder sintering is required to match the material of the processed object. If the wear resistance is too high, although the service life of the tool is increased, the processing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/42C22C33/04B22F1/00B22F9/08C22C9/00C22C9/02C22C9/06C22C1/02
Inventor 赵放唐明强王冲
Owner TIZ ADVANCED ALLOY TECH CO LTD
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