Method for improving fluidity of spray powder particles of hard alloy mixture

A technology of cemented carbide and mixed materials, which is applied in metal processing equipment, liquid separation into beads, granulation, transportation and packaging, etc. It can solve the problems of poor fluidity and rough surface of spray particles, so as to reduce fine particle spray powder and reduce The effect of incomplete spray drying and improving efficiency

Inactive Publication Date: 2020-07-17
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for improving the fluidity of cemented c

Method used

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  • Method for improving fluidity of spray powder particles of hard alloy mixture
  • Method for improving fluidity of spray powder particles of hard alloy mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Prepare the materials required for ball milling according to Table 1. and follow the steps below:

[0031] Table 1

[0032] material name weight and volume Specification Carbide Mixed Powder 500kg Fisherman's particle size 3μm alloy rod 1800kg Diameter 10mm, length 8mm paraffin 8.5kg 56# Refining fatty acid diethanolamide 0.3kg / Oleamide 0.7kg / industrial alcohol 130～150L 99.9% purity Cemented carbide ball mill jar 600L /

[0033] Put the alloy rod into the cemented carbide ball milling tank, then add cemented carbide mixed powder, paraffin and industrial alcohol in sequence, start the ball milling tank, stop after pre-grinding for 30 minutes and wait for the fatty acid diethanolamide and oleic acid amide mixture to be added;

[0034] Add fatty acid diethanolamide and oleic acid amide into industrial alcohol, stir with a stainless steel spoon until it is uniform and transparent without lumps,...

Embodiment 2

[0047] Prepare the materials required for ball milling according to Table 3. and follow the steps below:

[0048] table 3

[0049] material name weight and volume Specification Carbide Mixed Powder 500kg Fischer particle size 1~3μm alloy rod 1800kg Diameter 10mm, length 8mm paraffin 9kg 56# Refining fatty acid diethanolamide 0.5kg / Oleamide 0.5kg / industrial alcohol 140～150L 99.5% purity Cemented carbide ball mill jar 600L /

[0050] Put the alloy rod into the cemented carbide ball milling tank, then add cemented carbide mixed powder, paraffin and industrial alcohol in sequence, start the ball milling tank, stop after pre-grinding for 30 minutes and wait for the fatty acid diethanolamide and oleic acid amide mixture to be added;

[0051] Add fatty acid diethanolamide and oleic acid amide to an appropriate amount of industrial alcohol, and stir with a stainless steel spoon until it is uniform and tra...

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Abstract

The invention relates to a method for improving the fluidity of spray powder particles of a hard alloy mixture. Raw materials are prepared into the hard alloy mixture, a wet milling medium, an alloy bar and a forming agent are added for ball milling, and fatty acid diethanolamide and oleamide are added in the ball milling process; and mixture slurry obtained after wet milling is screened, spray-dried and pelletized, and the hard alloy spray particles smooth in surface and good in fluidity are prepared. The fatty acid diethanolamide and the oleamide are added, and in combination with ball milling and spray production processes matched with the fatty acid diethanolamide and the oleamide, the fatty acid diethanolamide can be fully fused with paraffin and ethyl alcohol; polar groups and non-polar groups in the fatty acid diethanolamide are combined with a ball milling medium and the paraffin correspondingly, and stable suspension is formed; the prepared mixture slurry is uniform and is notlikely to precipitate, the spraying efficiency is high, and the spray powder particles are good in uniformity; the spray powder particles are regular in morphology, smooth in surface and good in fluidity; and the prepared powder is good in pressing performance, and cracks and other defects are not likely to be generated.

Description

technical field [0001] The invention relates to a method for improving the fluidity of cemented carbide mixture spray powder particles, and belongs to the technical field of cemented carbide spray granulation. Background technique [0002] At present, in the production process of cemented carbide, it is necessary to mix the forming agent and cemented carbide powder evenly to obtain particles with certain fluidity, and then perform molding and pressing. Spray drying granulation is widely used in cemented carbide powder granulation because of its convenient operation, high production efficiency and high cleanliness. Carbide spray drying granulation mostly uses alcohol as the ball milling medium and paraffin as the forming agent. Paraffin (non-polar) and alcohol (polar) are incompatible with each other and cannot form a stable emulsified suspension. Coupled with the high density of cemented carbide powder, if the spraying process is not properly controlled, it is easy to caus...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F1/00B01J2/04
CPCB22F9/04B01J2/04B22F2009/043B22F1/10B22F1/14
Inventor 罗蒙鲍立强庹廉洁
Owner SHAREATE TOOLS
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