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Nano graphite composite lubricant for cold extrusion, and preparation method and application thereof

A composite lubricant, graphite lubricant technology, applied in the directions of lubricating compositions, additives, petroleum industry, etc., can solve the problem that the lubricant cannot meet the production requirements, achieve excellent diffusion and protective colloid, improve surface quality, and be difficult to decompose. Effect

Active Publication Date: 2015-09-30
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although traditional graphite lubricants can meet the requirements of general cold extrusion production, with the continuous development of industrial production, more and more parts have higher requirements for dimensional accuracy and surface quality. Can not meet production requirements

Method used

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  • Nano graphite composite lubricant for cold extrusion, and preparation method and application thereof
  • Nano graphite composite lubricant for cold extrusion, and preparation method and application thereof
  • Nano graphite composite lubricant for cold extrusion, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Added the nano-graphite of 0.6%% (by weight) in common cold extrusion graphite lubricant, wherein the purity of nano-graphite particle is more than 99%, particle diameter is 40nm, and adopts following preparation scheme:

[0027] (1) Take nano-graphite particles and add them to common graphite lubricants.

[0028] (2) Add chemical dispersant in the lubricant, its composition is 2.6% (by weight) sodium dioctyl sulfosuccinate and 1.5% (by weight) sodium methylenebisturide sulfonate.

[0029] (3) The lubricant was subjected to electromagnetic stirring for 25 minutes, then ultrasonically dispersed for 20 minutes, and continuously ultrasonicated 3 times to obtain a nano-graphite composite lubricant for cold extrusion.

[0030] This manufacturing technology and process is easy to implement for those skilled in the art, and those skilled in the art can implement the present invention according to the above description.

[0031] Coat the lubricant prepared in the above ratio o...

Embodiment 2

[0033] Nano-graphite composite lubricant with the following formula

[0034] Nanographite: 0.6%, graphite powder: 20%, molybdenum disulfide: 26%, tackifier: 0.4%, dispersant: 3%, magnesium oxide: 10%, water: balance.

[0035] Then prepare it in the following way:

[0036] (1) Take nano-graphite particles and add them to common graphite lubricants.

[0037] (2) Add chemical dispersant in lubricant, its composition is 1.6% (by weight) sodium dioctyl sulfosuccinate and 1.4% (by weight) sodium methylenebisturide sulfonate.

[0038] (3) The lubricant was subjected to electromagnetic stirring for 25 minutes, then ultrasonically dispersed for 20 minutes, and continuously ultrasonicated 3 times to obtain a nano-graphite composite lubricant for cold extrusion.

[0039] The lubricant prepared in the above ratio was coated on 5 actual extrusions of the flange jacket for testing, and the average forming load value obtained during the cold extrusion forming process was 145.0T (tested und...

Embodiment 3

[0041] Nano-graphite composite lubricant with the following formula

[0042] Nano graphite: 1%, ordinary graphite: 25%, molybdenum disulfide: 35%, tackifier: 0.5%, dispersant: 4.5%, magnesium oxide: 10%, water: the balance.

[0043] Then prepare it in the following way:

[0044] (1) Take nano-graphite particles and add them to common graphite lubricants.

[0045] (2) Add chemical dispersant in the lubricant, its composition is 2.6% (by weight) sodium dioctyl sulfosuccinate and 1.7% (by weight) sodium methylenebisturide sulfonate.

[0046] (3) The lubricant was subjected to electromagnetic stirring for 25 minutes, then ultrasonically dispersed for 20 minutes, and continuously ultrasonicated 3 times to obtain a nano-graphite composite lubricant for cold extrusion.

[0047] Coat the lubricant formulated in the above ratio on a ring whose material is 20 steel and whose outer diameter, inner diameter, and height ratio are 4:2:1, and use a 630T hydraulic press to upset the ring samp...

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Abstract

The invention relates to a nano graphite composite lubricant for cold extrusion, and a preparation method and application thereof. 0.6-1.5 wt% of nano graphite and 3-9 wt% of chemical dispersant are added into a common graphite lubricant for cold extrusion to obtain the nano graphite composite lubricant for cold extrusion. Compared with the prior art, due to the addition of the nano graphite particle, the lubricating property of the lubricant is further enhanced as compared with the traditional cold extrusion lubricant, and the lubricant has the advantages of high temperature resistance, stable chemical properties, low tendency to decomposition and no toxicity or odor. Due to the special properties of the graphite granules, the friction factor in the extrusion forming process is further lowered, and the surface quality of the formed part is further enhanced, thereby satisfying the production of parts with higher requirements for dimensional accuracy and surface quality.

Description

technical field [0001] The invention relates to the technical field of cold extrusion, in particular to a nano-graphite composite lubricant for cold extrusion and a preparation method and application thereof. Background technique [0002] During the extrusion process, due to the large amount of single deformation of the part, the unit positive pressure on the contact surface between the metal and the mold is extremely high, which is equivalent to 3 to 10 times the deformation resistance of the metal, or even higher. Under this condition, the surface of the deformed metal undergoes a drastic renewal, and a large number of new surfaces appear, which makes the phenomenon of metal bonding tools and molds serious. The energy lost due to friction accounts for 50%-70% of the world's primary energy, and wear is one of the main forms of material waste. In order to reduce or eliminate the occurrence of this phenomenon, lubricants are generally used during extrusion. The role of the ...

Claims

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Application Information

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IPC IPC(8): C10M161/00B21C23/32C10N40/24C10N30/04C10N30/06
Inventor 龚红英仇丹丹马婷婷黄继龙宋春雨邹琼琼
Owner SHANGHAI UNIV OF ENG SCI
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