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Manufacturing method of powder materials for additive manufacturing

A technology of additive manufacturing and manufacturing methods, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of difficulty in promoting additive manufacturing technology, inability to meet the requirements of teaching, trial production or low-end parts, and high cost. Achieve the effect of shortening the solidification time, improving the atomization efficiency and reducing the manufacturing cost

Active Publication Date: 2018-02-23
ANSTEEL BEIJING RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is precisely because of the high cost of raw materials that the current promotion of additive manufacturing technology is difficult, and it cannot meet the requirements of teaching, trial production or low-end parts.

Method used

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  • Manufacturing method of powder materials for additive manufacturing

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Experimental program
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Effect test

Embodiment 1

[0031] The normally produced iron powder is sieved to 1000 mesh, and the -1000 mesh iron powder produced is injected into the atomized water through compressed air as raw material. The molten iron with uniform and stable composition and less impurities can be obtained by smelting. The superheat of the molten iron is 260°C, the diameter of the liquid flow is 4-6mm; the pressure of the high-pressure airflow is 0.5Mpa, and the air flow rate is 3.5m 3 / min, high-pressure water atomization pressure is 115-120Mpa, flow rate is 180-200m 3 / min. The flow rate of -1000 mesh iron powder is 65g / s, the reducing gas is hydrogen, the reducing temperature is 450°C, and the reducing time is 40min. Grind and sieve the powder material of -100+300 mesh, adopt the coaxial powder feeding printing process, the laser power is 2000W, the spot diameter is 3mm, the scanning speed is 900mm / min, and the powder feeding volume is 2.5 rpm. The sorted -1000 mesh iron powder is used as the core particle for...

Embodiment 2

[0033] The normal production steel powder is sieved to 1000 mesh, and the -1000 mesh steel powder produced is injected into the atomized water through compressed air as raw material. The molten steel with uniform and stable composition and less impurities can be obtained by smelting. The superheat of molten steel is 260°C, the diameter of liquid flow is 4-6mm; the pressure of high-pressure airflow is 0.7Mpa, and the air flow rate is 3.5m 3 / min, high-pressure water atomization pressure is 115-120Mpa, flow rate is 180-200m 3 / min. The flow rate of -1000 mesh steel powder is 90g / s, the reducing gas is hydrogen, the reducing temperature is 450°C, and the reducing time is 50min. Grind and sieve powder materials of -300+1000 mesh, use the laser selection printing process with a laser power of 500W, and a scanning speed of 500mm / min. The sorted -1000 mesh iron powder is used as the core particle for the next smelting and is transported to the atomizer through high-pressure airflow...

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Abstract

The invention discloses a manufacturing method of powder materials for additive manufacturing. The method is characterized in that a minus 1000-mesh powder material is separated from ordinary water atomized iron powder, and the minus 1000-mesh powder material is conveyed into an atomizer through a high pressure air current and is adopted as core particles of a high-pressure cooling water medium toimprove fine powder rate and sphericility of powder material products. According to the method, minus 1000-mesh iron powder is adopted as a nucleation center and is dispersed in high-pressure high-speed atomized water, collision strength is improved, reaction free energy is changed when iron powder collides with molten iron or molten steel, solidification time is shortened while atomization efficiency is improved, and iron powder or steel powder with high sphericility and uniform particle size distribution is obtained; the adopted minus 1000-mesh iron powder is a low-value product in the normal production process and can be obtained through normal separation, the yield of a core product is increased while the utilization rate of the low-value product is increased, increase of impurity elements is avoided, and follow-up special treatment is not required; and the method is low in cost when utilized to manufacture iron powder or steel powder, and manufacturing cost of additive manufacturing products is greatly reduced.

Description

technical field [0001] The invention relates to the field of water-based metal antirust agents, in particular to a water-based antirust agent for hot-rolled and cold-rolled steel plates and a preparation method thereof. Background technique [0002] In recent years, additive manufacturing technology (also known as "3D" printing technology) has received more and more attention and applications due to its short-process manufacturing mode from raw materials to finished products. Additive manufacturing methods include metal injection molding methods, selective laser melting methods, and selective laser sintering methods, etc., which can meet the production of complex shapes, complex structures, and difficult-to-process parts, simplifying traditional milling, planing, grinding, and turning. The process has subverted the design idea of ​​processing parts first and then functioning, and returned to the simplest and most direct part design from function to design. It is precisely b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B22F1/00
CPCB22F9/082B22F2009/0828B22F2998/10B22F1/145B22F2009/0848
Inventor 原思宇马普生张栋张万山纪向军唐凯
Owner ANSTEEL BEIJING RES INST
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