Application of phenolic resin coating treatment technology to preparation of powder metallurgy material with ball milling method

A phenolic resin, processing technology, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as poor sintering compactness

Pending Publication Date: 2020-12-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the technical deficiency of poor sintering compactness caused by significant work hardening of the matrix metal while the soft and hard reinforcing or toughening phases are uniformly dispersed in the metal in the existing mechanical ball milling process, the invention provides a phenolic resin coated The a

Method used

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  • Application of phenolic resin coating treatment technology to preparation of powder metallurgy material with ball milling method
  • Application of phenolic resin coating treatment technology to preparation of powder metallurgy material with ball milling method
  • Application of phenolic resin coating treatment technology to preparation of powder metallurgy material with ball milling method

Examples

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Effect test

Embodiment 1

[0054] In Example 1, graphite flakes coated with phenolic resin and electrolytic copper powder were added to the ball milling equipment for high-energy ball milling. The particle size of the selected electrolytic copper powder is 150 μm (its hardness is 38 HV), and the particle size of flake graphite is 100 μm. Dissolve the prepared phenolic resin in an organic solvent to obtain a phenolic resin alcohol saturated solution, then impregnate the graphite flakes in an 80°C phenolic resin alcohol saturated solution for 2h, and then dry at 200°C for 10min. Then ball mill with electrolytic copper powder, the volume ratio of electrolytic copper powder and flake graphite is 5:1, the ball milling speed is 200 rpm, the ball milling time is 0.5h, the ball milling ball is stainless steel ball, the ball diameter is 3mm~10mm (ball milling ball The mass ratio of diameter 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm is 4:8:11:20:12:8:6:1), the sum of the mass of flake graphite and electrolytic copper pow...

Embodiment 2

[0058]In Example 2, the SiC whiskers coated with phenolic resin and electrolytic copper powder were added to the ball milling equipment for high energy ball milling. The particle size of the selected electrolytic copper powder is 150 μm (its hardness is 38 HV), and the SiC whisker has a diameter of 2 μm and a length of 200 μm. Dissolve the prepared phenolic resin in an organic solvent to obtain a phenolic resin alcohol saturated solution, then impregnate the SiC whiskers in the phenolic resin alcohol saturated solution at 80°C for 2h, and then dry it at 100°C for 2h. Then ball mill with electrolytic copper powder, the volume ratio of electrolytic copper powder and SiC whisker is 8:1, the ball milling speed is 220 rpm, the ball milling time is 1h, the ball milling ball is stainless steel ball, the ball diameter is 3mm~10mm (ball milling ball The mass ratio of diameter 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm is 4:8:11:20:12:8:6:1), the sum of the mass of SiC whisker and electrolytic c...

Embodiment 3

[0064] Present embodiment 3 is coated with ZrO with phenolic resin 2 The particles are fed into the ball milling equipment together with the electrolytic nickel powder for high energy ball milling. The particle size of the selected electrolytic nickel powder is 100μm (the hardness of the nickel powder is 50HV), ZrO 2 The particle size of the particles was 5 μm. Dissolve the prepared phenolic resin in an organic solvent to obtain a saturated solution of phenolic resin alcohol, and then ZrO 2 The particles were impregnated in phenolic resin alcohol saturated solution at 80°C for 2h, and then dried at 100°C for 2h. Then ball mill with electrolytic nickel powder, electrolytic nickel powder and ZrO 2 The volume ratio of the particles is 10:1, the milling speed is 220 rpm, the milling time is 1h, the milling balls are stainless steel balls, and the ball diameter is 3mm to 10mm (ball milling ball diameters are 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, The mass ratio of 9mm is 4:8:11:20:12:8:...

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Abstract

The invention relates to an application of a phenolic resin coating treatment technology to preparation of a powder metallurgy material with a ball milling method, and belongs to the technical field of powder. According to the application, phenolic resin is introduced as a control agent for the strength of the powder metallurgy material and a dispersant for various added substances, so that the problem of difficult pressing and sintering possibly caused by matrix work hardening in the ball milling process is successfully solved, and meanwhile, the problems that the various added substances aredifficult to uniformly disperse and the structural integrity of the added substances is obviously damaged in the crushing process are solved, and the strength of the material in the subsequent high-temperature use process is maintained. According to the application, for the hardness difference of soft and hard materials, in order to realize dispersion of substances having the relatively-large hardness difference in metal, different phenolic resin coating treatment is utilized, so that the influence of obvious work hardening brought by matrix ball milling on subsequent pressing and sintering is reduced while uniform dispersion is realized. The preparation technology is simple, the cost is low, and large-scale industrial application is facilitated.

Description

technical field [0001] The invention relates to the application of a phenolic resin coating treatment process in the preparation of powder metallurgy materials by a ball milling method; it belongs to the technical field of powder work hardening and particle or fiber dispersion control. Background technique [0002] Particle or fiber reinforced metal matrix composites have both the high electrical and thermal conductivity, good strength and toughness, corrosion resistance of metal and the high strength, high toughness, high temperature resistance or wear resistance of particles or fibers, etc., and are widely used as thermal conductivity materials, electrical conductivity Candidate materials in the fields of materials, friction materials, structural materials, etc. Usually such materials are prepared by powder metallurgy, but in order to achieve the excellent performance of the material, it is necessary to ensure the uniform dispersion of the reinforcing and toughening partic...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F1/00
CPCB22F9/04B22F2009/043B22F1/10
Inventor 方华婵
Owner CENT SOUTH UNIV
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