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A high-performance powder metallurgy lubricant

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

Inactive Publication Date: 2019-04-02
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 power tool powder metallurgy fixture, it contains 70wt% stearic acid, 15wt% stearic acid amide, and 5wt% polyethersulfone; the content of carbon particles (high-quality graphite particles, less than 1um) is 1wt%; nanometer metal oxides (5%wt Y2O3+95%wtZrO 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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PUM

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Abstract

The invention relates to a high-performance powder metallurgy lubricant, which comprises a lubricant matrix, carbon particles, nanometer metal oxides and polyethylene vinyl acetate grease, wherein the content of the lubricant matrix is ​​60-80wt%, and the content of carbon particles is 1-5wt%. , the nanometer metal oxide content is 0.1-1wt%, and the balance is polyethylene vinyl acetate. The lubricant matrix is ​​composed of polymers containing amide and carboxylic acid functional groups and aromatic polymers. In the lubricant matrix, the polymers containing amide and carboxylic acid functional groups account for 60-90wt% of the total amount of the lubricant matrix. Aromatic polymers are the balance. Compared with the prior art, the lubricant matrix in the present invention is a combination of base lubricants containing amides, carboxylic acids, and aromatic polymers. The combination of the lubricant matrix and long alkyl groups makes the lubricant have better and Uniform lubricating and spreading properties, and the agglomeration phenomenon is less likely to occur than fatty acids. Polyethylene vinyl acetate grease is added to the lubricant to promote the spreading of the 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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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00
CPCB22F1/10
Inventor 严彪严鹏飞黄家声杨百元
Owner TONGJI UNIV