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High-temperature demolding protection lubricant for producing copper alloy finished piece by hot extrusion method

A copper alloy and lubricant technology, which is applied in the lubricant field, can solve the problem of no lubricating oil, achieve the effects of no toxic and harmful gases, reduce production costs, and prolong service life

Active Publication Date: 2011-11-23
杭州丰源铜业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But so far, there is no lubricating oil that can meet the basic requirements of the above-mentioned red punch copper alloy lubricant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] First pour 5kg of 3000 mesh graphite powder into 50kg of rapeseed oil for stirring, then add 5kg of ammonium salt (ammonium sulfate or ammonium nitrate), 20kg of lithium-based grease, 5kg of lithium carbonate, alkyl sulfonate (linear alkane) Sodium sulfonate, sodium dodecyl sulfonate, sodium tetradecyl sulfonate or sodium octadecyl sulfonate) 10kg and suspending agent (bentonite, carboxymethyl cellulose or white carbon black) 5kg, then mix and stir well. As the graphite powder will precipitate, it should be stirred before use. When oiling, you can only use cotton yarn balls or old denim cloth strips, never use chemical fiber fabrics, apply the punch first, and then the concave mold, not too much, just an appropriate amount, and apply evenly and quickly.

[0058] The rapeseed oil in Example 1 can be replaced with soybean oil, cottonseed oil, rice bran oil, corn oil, sunflower oil, corn oil or other vegetable oils.

Embodiment 2

[0060] First pour 5kg of 4000 mesh graphite powder into 75kg of rapeseed oil for stirring, then add 3.5kg of ammonium salt, 10kg of lithium-based grease, 5kg of lithium carbonate, 1kg of alkyl sulfonate and 0.5kg of suspending agent, and then mix and Stir well.

[0061]The rapeseed oil in embodiment 2 can be replaced with soybean oil, cottonseed oil, rice bran oil, corn oil, sunflower oil, corn oil or other vegetable oils.

Embodiment 3

[0063] First pour 7kg of graphite powder above 3000 mesh into 55kg of rapeseed oil for stirring, then add 4kg of ammonium salt, 15kg of lithium-based grease, 7kg of lithium carbonate, 8kg of alkylsulfonate and 4kg of suspending agent, and then mix and Stir well.

[0064] The rapeseed oil in embodiment 3 can be replaced by soybean oil, cottonseed oil, rice bran oil, corn oil, sunflower oil, corn oil or other vegetable oils.

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Abstract

The invention relates to a high-temperature demolding protection lubricant for producing a copper alloy finished piece by a hot extrusion method, belonging to the technical field of lubricants. The high-temperature demolding protection lubricant is prepared from the following raw materials: 50-75% of vegetable oil, 10-25% of lithium-based grease, 5-20% of lithium carbonate, 5-20% of graphite powder, 0.5-5% of ammonium salt, 1-10% of alkyl sulfonate and 0.5-5% of suspending agent. The high-temperature demolding protection lubricant provided by the invention has the following advantages: 1) a pressure gauge copper joint produced by using the hot extrusion method and using the lubricant provided by the invention has the characteristics of no internal defects, smooth surface and no material adhesion and carbon deposition phenomena; 2) the wear of a mold cavity is reduced, and the service life of the mold cavity is prolonged by more than one time; 3) no adhesion phenomenon is generated, the normal demolding of a hot-extrusion finished piece is guaranteed, and the production efficiency is increased by more than 30%; 4) no obvious oil smoke, dust or toxic and harmful gases are generated in the processing site, thereby the environmental pollution is eliminated; and 5) the raw materials are conveniently available and are relatively low in price, and the production cost is lowered by more than 20%.

Description

technical field [0001] The invention belongs to the technical field of lubricants, and in particular relates to a high-temperature release protection lubricant for copper alloy parts produced by a red punching method. Background technique [0002] The production of copper alloy parts (or pressure gauge copper joints) by the red punching method is generally carried out under high temperature conditions of 500 to 550 degrees. The friction and lubrication of the mold are the main links. The quality of the lubrication is directly related to the red punching process. The roughness of the surface of the part, the service life of the mold, the demoulding of the part and the size of the extrusion force and many other aspects. Due to the short interval between the ejection time of the red punched parts, the temperature of the mold cavity and the blank is very close, and it is very easy to make the pressed parts adhere to the mold, making it difficult to eject the part. Therefore, in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N40/24C10N40/36C10N30/12C10N30/10
Inventor 李星恒黄友盈邵定华
Owner 杭州丰源铜业有限公司
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