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Lubricant agent special for powder metallurgical stainless steel

A powder metallurgy and lubricant technology, which is applied in the field of powder metallurgy stainless steel special lubricant and powder metallurgy lubricant, can solve the problem of high addition amount, achieve the effect of prolonging service life, improving strength and surface finish, yield and quality improvement

Inactive Publication Date: 2008-09-10
包敢锋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition amount of such lubricant additives is generally high, and the amount accounts for 1.0%-1.6% of powder metallurgy stainless steel materials

Method used

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  • Lubricant agent special for powder metallurgical stainless steel
  • Lubricant agent special for powder metallurgical stainless steel
  • Lubricant agent special for powder metallurgical stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Product aspect ratio <1:1

[0016] Step 1. Prepare lubricant

[0017] Take 50kg of -45um Ake wax, 30kg of -45um stearic acid, and 20kg of polyethylene vinyl acetate, and mix them evenly to prepare a lubricant.

[0018] Step 2. Production of powder metallurgy stainless steel products

[0019] Take 0.3kg of the lubricant prepared in step 1, add it to 99.7kg of powder metallurgy stainless steel powder, mix in a clean double cone mixer at a speed of 19r / min for 60min, and make powder according to the production process of ordinary powder metallurgy stainless steel parts Metallurgical stainless steel products.

Embodiment 2

[0020] Example 2: Product aspect ratio > 1:1

[0021] Step 1. Prepare lubricant

[0022] Take 50kg of -45um Ake wax, 30kg of -45um stearic acid, and 20kg of polyethylene vinyl acetate, and mix them evenly to prepare a lubricant.

[0023] Step 2. Production of powder metallurgy stainless steel products

[0024] Take 0.5kg of the lubricant prepared in step 1, add it to 99.5kg of powder metallurgy stainless steel powder, mix in a clean double cone mixer at a speed of 21r / min for 60min, and make powder according to the production process of ordinary powder metallurgy stainless steel parts Metallurgical stainless steel products.

[0025] In the above figures, figure 1 It is a comparison chart of demoulding force when special lubricant of the present invention and common lubricant are 6.4g / cc; figure 2 It is a comparison chart of 650Mpa pressing density between the special lubricant of the present invention and the common lubricant; image 3 It is a comparison chart of the sal...

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Abstract

The invention relates to a special lubricant for a powder metallurgy stainless steel. The lubricant is mainly composed of the raw materials with the following percentages by weight: 48 to 53 percent Ack wax of less than 45 um, 27 to 32 percent stearic acid of less than 45 um and 18 to 32 percent polyethylene vinyl acetate. When in production of the powder metallurgy stainless steel product with the height-to-diameter ratio of less than 1: 1, the addition quantity of the lubricant is 0.3 percent; when in production of the powder metallurgy stainless steel product with the height-to-diameter ratio of more than 1: 1, the addition quantity of the lubricant is 0.5 percent. The usage of the lubricant of the invention can improve the compact strength and the surface smoothness, greatly prolong the service life of a mold and enhance the productivity, the yield and the quality of the powder metallurgy stainless steel product.

Description

technical field [0001] The invention relates to a powder metallurgy lubricant, in particular to a special lubricant for powder metallurgy stainless steel. Added to powder metallurgy stainless steel powder to lubricate. The invention belongs to the technical field of powder metallurgy material additives. Background technique [0002] With the continuous development of the economy, stainless steel products are used more and more widely. As a near net shape technology, powder metallurgy stainless steel has great advantages in the production of stainless steel parts with expensive raw materials. Moreover, most of the stainless steel is austenitic stainless steel or ferritic stainless steel, which leads to high processing costs due to poor processing performance. Powder metallurgy stainless steel products can avoid or reduce the amount of machining, and have more advantages in cost. But also because stainless steel belongs to high-alloy steel, the particle hardness of stainles...

Claims

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Application Information

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IPC IPC(8): B22F1/00C10M169/04
Inventor 龙斌包敢锋
Owner 包敢锋
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