Special powder metallurgy lubricant for stainless steel and preparation method thereof

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...

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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 zinc oxide after sintering will also cause pollution to the sintering furnace, affecting the product The green strength of the

[0005] Although the imported Heganus Kenolube P11 has obvious advantages in comprehensive performance, it is only limited to the high powder filling height of some products. For large-sized products, it will still affect the release of the product, and Kenolube P11 contains metal zinc. Therefore, there will still be some carbon deposits on the surface during the sintering process, which will pollute the furnace at the same time.

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