Special powder metallurgy lubricant for stainless steel and preparation method thereof

A powder metallurgy and stainless steel technology, applied in the field of special powder metallurgy lubricant for stainless steel and its preparation, can solve the problems of unsatisfactory improvement of flow rate and pressing performance, relatively large influence on product green strength, unstable filling of mixed powder, etc. The effect of low demoulding force, less residual ash and convenient operation

Inactive Publication Date: 2013-04-24
曾锐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Micro-powdered wax products have better volatilization performance during use, but the improvement of powder metallurgy products in terms of flow rate and compaction performance of the product is not ideal, and sometimes it will reduce the flow performance of the powder, resulting in unstable filling of the mixed powder
[0004] Zinc stearate and lithium stearate are commonly used lubricants, but due to the chemical properties of the product itself, a large amount of carbon will remain on the surface of the product after sintering, and the zi...

Method used

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  • Special powder metallurgy lubricant for stainless steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of a special powder metallurgy lubricant for stainless steel. The specific operation steps are: mixing the raw material stearate, oleic acid amide and vinyl bisstearamide at normal temperature 20°C-25°C, heating to temperature T 1 150℃~170℃, after heating at constant temperature for 20min~40min, after the raw materials are mixed evenly, cool the homogeneously mixed raw material mixture to the temperature T 2 Grinding, crushing and sieving at a temperature of 20°C to 30°C to obtain finished powder metallurgy lubricants for stainless steel.

[0026] The mass percentage of stearate is 10%-40%, the weight percentage of oleic acid amide is 10%-40%, and the weight percentage of the vinylbisstearamide is 40%-70%.

[0027] Commonly used stearate lubricants are zinc stearate, magnesium stearate, barium stearate, sodium stearate, calcium stearate, aluminum stearate, 12-hydroxy lithium stearate and stearic acid Lithium, due to the residual zinc oxide in the p...

Embodiment 2

[0033] Same as Example 1, the difference is:

[0034] The weight percentage of lithium stearate is 20%, the weight percentage of oleic acid amide is 20%, and the weight percentage of vinylbisstearamide is 60%.

Embodiment 3

[0036] Same as Example 1, the difference is:

[0037] The weight percentage of lithium stearate is 40%, the weight percentage of oleic acid amide is 10%, and the weight percentage of vinylbisstearamide is 50%.

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Abstract

The invention relates to a special powder metallurgy lubricant for a stainless steel and a preparation method thereof, and belongs to the technical field of additives for powder metallurgy materials. According to the special powder metallurgy lubricant for the stainless steel and the preparation method thereof, provided by the invention, a stearate, a vinyl-based distearic amide and an oleamide are adopted as the raw materials, the raw materials are uniformly mixed and heated to reach a certain temperature, and then the mixture is cooled, grinded, crushed and screened, thus obtaining the finished product of the special powder metallurgy lubricant for the stainless steel. The special powder metallurgy lubricant for the stainless steel, provided by the invention, is suitable for being used for pressing powders of stainless steels 304 and 316; and the special powder metallurgy lubricant is low in capacity of pressing and demoulding, low in production cost and high in production efficiency, and can ensure the safety of a mould in use.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy material additives, in particular to a special powder metallurgy lubricant for stainless steel and a preparation method thereof. Background technique [0002] At present, the lubricants used in the domestic powder metallurgy market mainly include micronized wax (Ake wax), zinc stearate, lithium stearate and some compound lubricants, such as the products of Hoganus Kenolube P11. However, these lubricants have more or less problems, mainly in the following aspects: [0003] Micronized wax products have better volatilization performance during use, but the flow rate and compaction performance of the product are not ideal for improving powder metallurgy products, and sometimes the flow performance of the powder will be reduced, resulting in unstable filling of the mixed powder. [0004] Zinc stearate and lithium stearate are commonly used lubricants, but due to the chemical properties of th...

Claims

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Application Information

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IPC IPC(8): C10M105/00C10N40/24
Inventor 曾锐
Owner 曾锐
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