Spray shaping special-purpose powdered iron

A technology of injection molding and iron powder, which is applied in the direction of coating, etc., can solve the problem that the particle shape of the powder cannot be satisfied, and achieve the effect of good density and other properties and precise process parameters

Inactive Publication Date: 2008-04-09
王惠民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problem that the particle size of the metal powder material and the surface of the powder particles in the prior art cannot be less than 0.5-20 μm, even if the powder particles are less than 0.5-20 μm, it cannot meet the technical requirements of spray molding In order to solve the problem of powder particle shape, a special iron powder for injection molding is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: A special iron powder for injection molding is prepared by the following method, using the metal nano powder zero-boundary particle cutting production process at 10°C, and the frequency of high-frequency cutting is set at 5000 times per minute Production and processing of nano-iron powder with special injection molding technology in the shape of powder particles, and then sorting out (200nm as an example) D3=51nm D25=125.1nm D50=200nm D75=273.2nm D97=317.3nm The particle distribution is relatively Dispersed powder materials, and then use the "DQ coating method" to continue the anti-oxidation coating on the iron powder particles with a thickness of 2nm to 3nm, so that the anti-oxidation time can reach more than 90 hours.

[0022] For iron powder sorting, you can choose "cyclone classification process". time. Use artificial wind force and speed to effectively classify iron powder particles with different diameters in a closed container.

[0023] Nano-iron pow...

Embodiment 2

[0024]Example 2: A special iron powder for injection molding is prepared by the following method, using the metal nano powder zero-boundary particle cutting production process at 25°C, and the frequency of high-frequency cutting is set at 6000 times per minute Production and processing of nano-iron powder with special injection molding technology in the shape of powder particles, and then sorting out (200nm as an example) D3=51nm, D25=125.1nm, D50=200nm, D75=273.2nm, D97=317.3nm The particle distribution is relatively dispersed powder material, and then use the "DQ coating method" to continue the anti-oxidation coating on the iron powder particles with a thickness of 2nm~3nm, so that the anti-oxidation time can reach more than 90 hours.

Embodiment 3

[0025] Example 3: A special iron powder for injection molding is prepared by the following method, using the metal nano powder zero-boundary particle cutting production process at 18°C, and the frequency of high-frequency cutting is set at 5500 times per minute Production and processing of nano-iron powder with special injection molding technology for powder particles, and then sorting out (200nm as an example) D3=51nm D25=125.1nm D50=200nm D75=273.2nm D97=317.3nm The particle distribution is relatively Dispersed powder materials, and then use the "DQ coating method" to continue the anti-oxidation coating on the iron powder particles with a thickness of 2nm to 3nm, so that the anti-oxidation time can reach more than 90 hours.

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Abstract

The invention relates to nanometer scale iron powder, in particular to spray molding special purpose iron powder. The invention solves the problem existing in the prior art that the particle diameter of metal powder material and the powder particle surface can not reach 0.5 to 20 micron. Through utilizing the cutting manufacturing process of the zero zone particles of the nanometer powder body under the circumstance of 10 DEG C to 25 DEG C and the circumstance of setting the high frequency cutting times to be in 5000 times to 6000 times per minute, nanometer iron powder particles are produced, powder materials with D3=51nm, 125.1nm=D25, D50=200nm and =D75=273.2nm, and D97 = 317.3nm particles which are distributed more dispersedly are graded, the anti-oxidization coating is performed to the iron powder particles. The invention breaks through the 0.5 to 20 micron range of the international spray molding technology metal powder material at present, and the nanometer scale iron powder can be arbitrarily produced and processed between the micron and the nanometer.

Description

technical field [0001] The invention relates to a nano-level iron powder, in particular to a special iron powder for injection molding. Background technique [0002] Metal Powder Jetting - Forming Technology for the 21st Century. Metal powder injection molding technology (Metal Powder Injection Molding, referred to as MIM) is a new type of powder metallurgy near net shape forming technology formed by introducing modern plastic injection molding technology into the field of powder metallurgy. The basic process is: firstly, the solid powder and the organic binder are evenly mixed, and after granulation, they are injected into the mold cavity with a spray molding machine in a heated and plasticized state (~150°C) to solidify and form, and then chemically or thermally The method of decomposition removes the binder in the formed blank, and finally obtains the final product through sintering and densification. Compared with traditional technology, it has the characteristics of h...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F1/02
Inventor 王惠民
Owner 王惠民
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