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Preparation method of low-cost medium carbon steel spherical powder for 3D printing

A 3D printing and spherical powder technology, applied in metal processing equipment, transportation and packaging, etc., to achieve the effect of optimizing process parameters, reducing the number and size of inclusions, and less impurities

Pending Publication Date: 2020-08-25
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still relatively few studies on powder preparation of medium carbon steel for 3D printing, so it is of great significance to carry out research on related powder preparation processes

Method used

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  • Preparation method of low-cost medium carbon steel spherical powder for 3D printing
  • Preparation method of low-cost medium carbon steel spherical powder for 3D printing
  • Preparation method of low-cost medium carbon steel spherical powder for 3D printing

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The specific steps of the invention of a medium-carbon steel metal spherical powder for 3D printing:

[0031] S1: Proportion medium carbon steel according to C: 0.43%; Mn: 0.58%; Si: 0.18%; Cr: 0.25%;

[0032] S2: The medium-carbon steel alloy rod smelted according to S1 is subjected to fine turning processing to remove the black oxide scale on the surface, and the powder meets the requirements of plasma rotating electrode atomization to obtain powder. The density of the alloy rod reaches more than 99%, and the surface is not obvious. Defects, the diameter of the processed medium carbon steel alloy bar is 70mm, the length is 230mm, the circular runout is 0.02mm, the straightness deviation is 0.86mm / m, and the roughness is 1.2μm;

[0033] S3: The electrode rod processed by S2 is put into the plasma rotary electrode powder making machine to form a new dynamic sealing structure, and then vacuumized and filled with protective gas: argon and helium mixed gas, so that the pre...

Embodiment 2

[0037] Concrete steps for the invention of a medium-carbon steel metal spherical powder for 3D printing:

[0038] S1: According to C: 0.43%; Mn: 0.58%; Si: 0.18%; Cr: 0.25%; Ni: 0.24%;

[0039]S2: The medium-carbon steel alloy rod smelted according to S1 is subjected to fine turning processing to remove the black oxide scale on the surface, and the powder meets the requirements of plasma rotating electrode atomization to obtain powder. The density of the alloy rod reaches more than 99%, and the surface is not obvious. Defects, the diameter of the processed medium carbon steel alloy bar is 70mm, the length is 230mm, the circular runout is 0.02mm, the straightness deviation is 0.86mm / m, and the roughness is 1.2μm

[0040] S3: The electrode rod processed by S2 is put into the plasma rotary electrode powder making machine to form a new dynamic sealing structure, and then vacuumized and filled with protective gas: argon and helium mixed gas, so that the pressure in the powder makin...

Embodiment 3

[0044] The specific steps of the invention of a medium-carbon steel metal spherical powder for 3D printing:

[0045] S1: According to C: 0.43%; Mn: 0.58%; Si: 0.18%; Cr: 0.25%; Ni: 0.24%;

[0046] S2: The medium-carbon steel alloy rod smelted according to S1 is subjected to fine turning processing to remove the black oxide scale on the surface, and the powder meets the requirements of plasma rotating electrode atomization to obtain powder. The density of the alloy rod reaches more than 99%, and the surface is not obvious. Defects, the diameter of the processed medium carbon steel alloy bar is 80mm, the length is 240mm, the circular runout is 0.02mm, the straightness deviation is 0.86mm / m, and the roughness is 1.2μm

[0047] S3: The electrode rod processed by S2 is put into the plasma rotary electrode powder making machine to form a new dynamic sealing structure, and then vacuumized and filled with protective gas: argon and helium mixed gas, so that the pressure in the powder m...

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Abstract

The invention discloses a preparation method of low-cost medium carbon steel spherical powder for 3D printing. The preparation method comprises the following steps: proportioning medium carbon steel from the following components: 0.43% of C, 0.58% of Mn, 0.18% of Si, 0.25% of Cr, 0.24% of Ni and the balance of Fe, adopting vacuum induction melting to prepare a carbon steel bar, removing the oxidescale on the surface of the alloy bar through machining to process an electrode bar size meeting the requirement of a plasma rotating electrode atomization powder manufacturing apparatus, placing theelectrode bar in a flour mill, adopting a plasma gun to melt the end part of the electrode bar to obtain spherical powder under the action of the centrifugal force, and later, adopting supersonic vibration to screen the collected powder according to different particle sizes. According to the preparation method, plasma rotating electrode atomization is adopted to prepare medium carbon steel spherical metal powder, and the prepared powder has the characteristics of being high in degree of sphericity, less in satellite powder, high in powder density and low in impurity content, can meet the demand of metal powder for 3D printing and is suitable for wide popularization.

Description

technical field [0001] The invention relates to the field of manufacturing metal spherical powders for 3D printing, in particular to a method for preparing low-cost medium-carbon steel spherical powders for 3D printing. Background technique [0002] Due to its excellent mechanical properties, easy smelting, and low price, iron and steel materials are currently the most widely used metal materials in the world. [0003] Medium carbon steel (C:0.25%~0.60%) has good plasticity and strength, and is widely used in various structural and load-bearing parts. Higher carbon contents, while producing superior strength, tend to result in poor weldability of the material. At present, the traditional material processing method welding technology is very easy to produce cracks when processing medium carbon steel, which requires preheating, post-processing and other cumbersome processes. 3D printing technology is an integrated forming material processing technology produced in the 20th c...

Claims

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Application Information

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IPC IPC(8): B22F9/14B22F1/00C22C38/02C22C38/04C22C38/40
CPCB22F9/14C22C38/02C22C38/04C22C38/40B22F1/065
Inventor 刘世锋宋玺王岩
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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