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Treatment method for improving performance of 3D printing metal workpiece

A technology of 3D printing and processing method is applied in the field of processing to improve the performance of 3D printed metal parts to achieve the effects of improving performance, enhancing wear resistance and increasing stability

Active Publication Date: 2014-10-08
NANTONG HUDA MASCH EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no literature reports on the use of cryogenic treatment to improve the performance of 3D printed metal parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Put the 3D-printed metal sheet using aluminum alloy powder into a cryogenic treatment device, and cool it down from room temperature to -190°C at 2°C / min and keep the temperature constant for 10h.

[0023] After the metal parts that have been subjected to cryogenic treatment once are heated to room temperature at 5°C / min, after a time interval of 20min, they are heated to 200°C for tempering treatment and kept for 2h.

[0024] Finally, place the metal piece in the air and let it cool down to room temperature naturally.

[0025] Put the above-mentioned metal parts cooled to room temperature into the cryogenic treatment device again, and lower the temperature from room temperature to -160 °C at 5 °C / min and keep the temperature constant for 10 h.

[0026] After the second cryogenically treated metal piece is heated to room temperature at 10°C / min, after a time interval of 20min, it is heated to 180°C for tempering treatment and kept for 3h.

[0027] Finally, the metal pa...

Embodiment 2

[0030] Put the 3D-printed metal cylinder using tool steel powder into the cryogenic treatment device, and cool it from room temperature to -190°C at 1°C / min and keep the temperature constant for 15h.

[0031] Raise the temperature of the metal parts that have been cryogenically treated once to room temperature at 3°C / min, and after a time interval of 15 minutes, heat to 180°C for tempering treatment and keep warm for 5h.

[0032] Finally, place the metal piece in the air and let it cool down to room temperature naturally.

[0033] Put the above-mentioned metal parts cooled to room temperature into the cryogenic treatment device again, and lower the temperature from room temperature to -180 °C at 10 °C / min and keep the temperature constant for 12 hours.

[0034] The metal parts subjected to secondary cryogenic treatment were raised to room temperature at 14°C / min, and after a time interval of 15 minutes, heated to 200°C for tempering treatment and kept for 4 hours.

[0035] Fi...

Embodiment 3

[0038] Put the thicker metal plate 3D printed with stainless steel powder into the cryogenic treatment device, cool it from room temperature to -200°C at 5°C / min and keep the temperature constant for 20h.

[0039] Raise the temperature of the metal parts that have been cryogenically treated once to room temperature at 8°C / min, and after a time interval of 10 minutes, heat to 200°C for tempering treatment and keep warm for 5h.

[0040] Finally, place the metal piece in the air and let it cool down to room temperature naturally.

[0041] Put the above-mentioned metal parts into the cryogenic treatment device after cooling to room temperature, and lower the temperature from room temperature to -200 °C at 12 °C / min and keep the temperature constant for 20 hours.

[0042] Raise the temperature of the metal parts subjected to secondary cryogenic treatment to room temperature at 20°C / min, and after a time interval of 10 minutes, heat to 195°C for tempering treatment and keep warm for...

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PUM

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Abstract

The invention discloses a treatment method for improving the performance of a 3D printing metal workpiece. The treatment method comprises the following steps of sequentially carrying out primary cryogenic treatment and primary tempering treatment; carrying out secondary cryogenic treatment and secondary tempering treatment on a metal for 3D printing. The 3D printing metal workpiece treated by the treatment method disclosed by the invention has the micro-structural characteristic that when the 3D printing metal workpiece is subjected to cryogenic treatment, due to ultra-low temperature effect, the internal microstructure of the metal workpiece is shrunk, the gap is reduced, and thus the density of the product is increased; meanwhile, under cryogenic treatment conditions, ultrafine carbides are precipitated, the fine dispersed carbides can hinder the movement of dislocation in the plastic deformation of the material, and thus the wear resistance of the metal workpiece is enhanced; the lattice of martensite is promoted to be changed at an ultra-low temperature environment, the internal microstress of the metal workpiece is reduced, and the microstructure is strengthened, so that the hardness, impact toughness and wear resistance of the metal workpiece are significantly increased, and the microstructure and overall performances of the metal workpiece are finally improved, thereby enhancing the mechanical properties of the 3D printing metal workpiece.

Description

technical field [0001] The invention relates to a processing method for improving the performance of metal parts, in particular to a processing method for improving the performance of 3D printing metal parts. Background technique [0002] 3D printing technology is rapidly changing traditional production methods and lifestyles. As a strategic emerging industry, the United States, Germany and other developed countries attach great importance to and actively promote this technology. Many experts believe that the new manufacturing technology represented by 3D printing technology characterized by digitalization, networking, personalization and customization will promote the third industrial revolution. The source of 3D printing technology can be traced back to rapid prototyping technology. Since the development of 3D computer-aided design (3DCAD), people hope to directly convert design into physical objects conveniently. The 3D printing technology is to divide the 3DCAD model in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D6/04
Inventor 刘红梅徐元彬倪红军吴成群吕毅黄明宇朱昱汪兴兴朱爱东张欣
Owner NANTONG HUDA MASCH EQUIP CO LTD
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