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A kind of diamond micropowder-copper base alloy composite particle and preparation method thereof

A technology of diamond micropowder and copper-based alloy, applied in metal processing equipment, chemical instruments and methods, abrasives, etc., can solve the problems of unstable performance of diamond micropowder abrasive tools, segregation of diamond micropowder, etc., to improve physical/mechanical properties, prevent The effect of macrosegregation

Active Publication Date: 2021-02-26
天津佐源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the large density difference and ratio difference between diamond and metal bond, during the operation of abrasive tool making, it may cause severe segregation of diamond powder
Insufficient holding and segregation will seriously cause unstable performance of diamond micropowder abrasive tools

Method used

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  • A kind of diamond micropowder-copper base alloy composite particle and preparation method thereof
  • A kind of diamond micropowder-copper base alloy composite particle and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] This embodiment provides a method for preparing diamond micropowder-copper-based alloy composite material particles, comprising the following steps:

[0034] (1) Mix tin, titanium and copper at a mass ratio of 25:0.3:74.7 and heat to 980°C to obtain an alloy melt;

[0035] (2) The alloy melt is poured into the tundish, so that the melt flows out from the Φ5mm aperture at the bottom of the tundish to become an alloy stream, and the flow rate of the alloy stream is controlled by a plunger valve to be 3kg / min. The alloy stream enters the atomization chamber of nitrogen atmosphere;

[0036] (3) in the atomization chamber of nitrogen atmosphere, the diamond micropowder that particle diameter is 20 μ m is injected into described alloy flux by flow rate 55g / min, obtains mixed flux;

[0037] (4) spray the mixed stream with 0.2MPa high-pressure nitrogen to make the mixed stream become a droplet, and then use 10 3 The cooling rate of K / sec is rapidly cooled to make solidified p...

Embodiment 2

[0040] This embodiment provides a method for preparing diamond micropowder-copper-based alloy composite material particles, comprising the following steps:

[0041] (1) Mix tin, tungsten and copper in a mass ratio of 5:0.1:94.9 and heat to 950°C to obtain an alloy melt;

[0042] (2) The alloy melt is poured into the tundish, so that the melt flows out from the Φ5mm aperture at the bottom of the tundish to become an alloy stream, and the flow rate of the alloy stream is controlled by a plunger valve to be 12kg / min. The alloy stream enters the atomization chamber of nitrogen atmosphere;

[0043] (3) in the atomization chamber of nitrogen atmosphere, the diamond micropowder that particle size is 1 μ m is injected into described alloy flux by flow rate 422g / min, obtains mixed flux;

[0044] (4) spray the mixed stream with the high-pressure nitrogen of 2MPa to make the mixed stream become a droplet, and then use 10 5 The cooling rate of K / sec is rapidly cooled to make solidified ...

Embodiment 3

[0047] This embodiment provides a method for preparing diamond micropowder-copper-based alloy composite material particles, comprising the following steps:

[0048] (1) Mix tin, molybdenum and copper in a mass ratio of 40:2:58 and heat to 1200°C to obtain an alloy melt;

[0049] (2) The alloy melt is poured into the tundish, so that the melt flows out from the Φ5mm aperture at the bottom of the tundish to become an alloy stream, and the flow rate of the alloy stream is controlled by a plunger valve to be 6kg / min. The alloy stream enters the atomization chamber in the argon atmosphere;

[0050] (3) in the atomization chamber of argon gas atmosphere, the diamond micropowder that particle diameter is 50 μ m is injected into described alloy flux by flow rate 79g / min, obtains mixed flux;

[0051] (4) spray the mixed stream with 1MPa high-pressure argon to make the mixed stream become a droplet, and then spray the mixed stream with 10 4 The cooling rate of K / sec is rapidly cooled ...

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Abstract

The invention relates to a diamond micropowder-copper-based alloy composite particle and a preparation method thereof. In the preparation method, tin, carbide forming elements and copper are mixed and heated to obtain an alloy melt, and the alloy melt is passed through a tundish The alloy stream is made, and the diamond micropowder is injected into the alloy stream to obtain a mixed stream, and then the mixed stream is sprayed with a high-pressure inert gas to obtain liquid droplets, and finally the liquid droplets are rapidly cooled to obtain the product. The diamond micropowder-copper-based alloy composite material particles obtained by the preparation method of the present invention can be used in the binder system of any abrasive tool below the melting point of the compound grain copper-tin alloy to obtain a diamond micropowder bond abrasive tool, and realize diamond micropowder in the abrasive tool. Good holding and even dispersion.

Description

technical field [0001] The invention belongs to the technical field of diamond polishing abrasive tools, and in particular relates to a diamond micropowder-copper-based alloy composite particle and a preparation method thereof. Background technique [0002] Natural or synthetic diamond abrasives are generally divided into three levels in industrial applications: [0003] (1) Diamond for sawing / drilling (grain size 450-250μm); [0004] (2) Diamond for grinding (particle size 250-50 μm); [0005] (3) Diamond used for polishing (particle size 0.1-50 μm), this type of diamond is also called diamond powder. [0006] Diamond abrasives must be held by a bond to achieve effective processing of workpiece materials. The bond materials for diamond abrasives include metal bonds, ceramic bonds, and resin bonds. Diamond abrasives are evenly dispersed in metals, ceramics, and resins. In the matrix of the agent, it becomes an abrasive tool. This type of grinding tool is also called bond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/14B24D3/34
CPCB24D3/34C09K3/1436
Inventor 李珮豪彭波
Owner 天津佐源新材料科技有限公司
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