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High-performance powder metallurgy lubricant

A powder metallurgy and lubricant technology, used in metal processing equipment, transportation and packaging, can solve problems such as easy agglomeration, achieve good lubrication and spreading performance, reduce forming process requirements, and uniformly lubricate spreading performance.

Active Publication Date: 2016-09-21
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned lubricants are prone to agglomeration due to their fatty acid content.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] For a high-performance gear, it contains 20wt% of oleic acid amide, 30wt% of bisstearic acid amide, and 10wt% of polyaryl sulfone; the content of carbon particles (high-quality graphite particles, less than 200nm) is 2wt%; nanometer metal oxides (ZrO2, less than 100nm) content of 0.3wt%; polyethylene vinyl acetate is the balance, and the additive is added by mixing the metal powder with a high-energy planetary mixer. Overall, the forming pressure is reduced by 10%, the surface smoothness and density uniformity are better, and the strength of the sintered product is slightly higher than that of the original product, especially the strength of the teeth.

Embodiment 2

[0023] For a powder metallurgy fixture of an electric tool, it contains 70wt% of stearic acid, 15wt% of stearic acid amide, and 5wt% of polyethersulfone; the content of carbon particles (high-quality graphite particles, less than 1um) is 1wt%; +95% wt ZrO 2 , the particle size is less than 100nm) content of 0.1wt%; polyethylene vinyl acetate is the balance, and the additives are ball milled and granulated after polymer melting. Overall, the forming pressure is reduced by 5%, and the surface finish and density uniformity are better.

Embodiment 3

[0025] A high-performance powder metallurgy lubricant, comprising a lubricant matrix, carbon particles, nano-metal oxides and polyethylene vinyl acetate, wherein the content of the lubricant matrix is ​​60wt%, the content of carbon particles is 1wt%, and the content of nano-metal oxides is 0.1wt%, and the balance is polyethylene vinyl acetate.

[0026] Among them, the lubricant matrix is ​​composed of polymers containing amide and carboxylic acid functional groups and aromatic polymers. In the lubricant matrix, polymers containing amide and carboxylic acid functional groups account for 60wt% of the total amount of the lubricant matrix. Aromatic polymers Things are surplus.

[0027] The polymer containing amide and carboxylic acid functional groups is a mixture of primary fatty acid amide and fatty acid bisamide in a mass ratio of 1:1. The molecular weight of the polymer containing amide and carboxylic acid functional groups is between 200-300. Aromatic polymers include polya...

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Abstract

The invention relates to high-performance powder metallurgy lubricant. The high-performance powder metallurgy lubricant comprises a lubricant matrix, carbon particles, nanometer metal oxides and polyethylene vinyl acetate, wherein the content of the lubricant matrix is 60-80 wt%, the content of the carbon particles is 1-5 wt%, the content of the nanometer metal oxides is 0.1-1 wt%, and the balance is polyethylene vinyl acetate. The lubricant matrix consists of a polymer containing amide and carboxylic acid functional groups, and an aromatic polymer; and in the lubricant matrix, the polymer containing the amide and carboxylic acid functional groups is 60-90 wt% of the total quantity of the lubricant matrix, and the balance is the aromatic polymer. Compared with the prior art, the lubricant matrix is a basic lubricant composition containing amide, carboxylic acid and the aromatic polymer; and under a combined effect of the lubricant matrix and long alkyl, the lubricant has relatively good and uniform lubricating and spreading performance, and the agglomeration phenomenon is not easy to occur compared with fatty acids. The lubricant is added with polyethylene vinyl acetate to accelerate spreading of a lubricating film.

Description

technical field [0001] The invention relates to a metallurgical lubricant, in particular to a high-performance powder metallurgy lubricant. Background technique [0002] Powder metallurgy is a processing method that uses metal powder as raw material to make various products by pressing and sintering. The essential advantage of the production process of powder metallurgy parts is the rapid prototyping capability of complex parts and the high utilization rate of materials. [0003] The powder metallurgy process consists of three main steps. First, the main constituent materials are decomposed into powders composed of many fine particles; size of the compact; finally, the compact is sintered. Lubricants are usually added to the raw materials for better fusion of fine particles and release of the green compact. In order to remove the mold for replacement, a variety of lubricants are added to some materials. When the various lubricants are mixed with the material, it is easy t...

Claims

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Application Information

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IPC IPC(8): B22F1/00
CPCB22F1/10
Inventor 严彪严鹏飞黄家声杨百元
Owner TONGJI UNIV