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Method for preparing spherical cobalt-chromium-molybdenum alloy powder for micron-level additive material manufacturing

A cobalt-chromium-molybdenum alloy and additive manufacturing technology, applied in the field of materials, can solve problems such as poor fluidity of cobalt-chromium-molybdenum alloy powder

Inactive Publication Date: 2018-11-23
LONGYAN ZIJIN INNOVATION RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention intends to solve the problem that the cobalt-chromium-molybdenum alloy powder with irregular shape obtained by the water atomization method cannot be directly applied to additive manufacturing due to poor fluidity, and provides a processing method using radio frequency plasma powder The volume spheroidization system further processes the irregular cobalt-chromium-molybdenum alloy powder obtained by water atomization, and after a series of processes such as melting and solidification in the plasma area, finally obtains regular shape, high spheroidization rate (≧90%), Micron-sized spherical cobalt-chromium-molybdenum alloy powder with high sphericity, high bulk density and excellent performance

Method used

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  • Method for preparing spherical cobalt-chromium-molybdenum alloy powder for micron-level additive material manufacturing
  • Method for preparing spherical cobalt-chromium-molybdenum alloy powder for micron-level additive material manufacturing
  • Method for preparing spherical cobalt-chromium-molybdenum alloy powder for micron-level additive material manufacturing

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Experimental program
Comparison scheme
Effect test

Embodiment 2

[0037] The experimental parameters selected for the spheroidization experiment are: the air pressure in the final reaction vessel is 15.0psia; the grid current is 0.43A; the plate voltage is 7.0KV; the plate current is 3.6A; the feeding speed is 4.5rpm; 50 psig; argon central gas flow pressure is 15 psig; argon powder supply gas flow pressure is 8 psig; hydrogen gas inlet pressure is 8 psig.

[0038]The spheroidization rate of the micron-sized spherical cobalt-chromium-molybdenum alloy powder after spheroidization is not lower than 90%.

Embodiment 3

[0040] The experimental parameters selected for the spheroidization experiment are: the air pressure in the final reaction vessel is 14.7psia; the grid current is 0.45A; the plate voltage is 7.5KV; the plate current is 3.9A; the feeding speed is 4.6rpm; The pressure of the argon central gas flow is 13 psig; the pressure of the argon powder supply gas flow is 7 psig; the pressure of the hydrogen gas inlet is 6 psig.

[0041] The spheroidization rate of the micron-sized spherical cobalt-chromium-molybdenum alloy powder after spheroidization is not lower than 90%.

Embodiment 4

[0043] The experimental parameters selected for the spheroidization experiment are: the air pressure in the final reaction vessel is 14.3psia; the grid current is 0.44A; the plate voltage is 8.0KV; the plate current is 4.2A; the feeding speed is 4.8rpm; It is 63 psig; the pressure of argon central gas flow is 17 psig; the pressure of argon powder supply gas flow is 9 psig;

[0044] The spheroidization rate of the micron-sized spherical cobalt-chromium-molybdenum alloy powder after spheroidization is not lower than 90%.

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Abstract

The invention provides a method for preparing spherized cobalt-chromium-molybdenum alloy powder for micron-level additive material manufacturing. The adopted raw material is irregular cobalt-chromium-molybdenum alloy powder prepared through water atomization, and the micron-level spherical cobalt-chromium-molybdenum alloy powder with the irregular shape, the high nodularity larger than or equal to90%, the high sphericity degree and the high stacking density can be obtained through adjusted experiment parameter spheroidizing, and the spherical cobalt-chromium-molybdenum alloy powder can be directly used for additive material manufacturing due to good mobility.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing spherical cobalt-chromium-molybdenum alloy powder for micron-scale additive manufacturing. Background technique [0002] Micron-sized spherical metal powders are widely used in the field of additive manufacturing, and compared with other types of materials (foils, bulk materials), powder materials have many advantages, such as easier preparation, high material utilization, Wide range of categories, simple construction process, etc. In the additive manufacturing process, selective laser melting molding (SLM), laser near net shaping (LENS), electron beam melting molding (EBM), etc. are all used in the role of micron-sized spherical metal powder materials in the energy source. Formed by melting and accumulating. [0003] Whether it is domestic or foreign, there are many research and development units that have carried out research and developme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00
CPCB33Y40/00B33Y70/00B22F2999/00B22F2998/10B22F1/065B22F1/14B22F2009/0828B22F2202/13
Inventor 陈锐刘志光陈海霞
Owner LONGYAN ZIJIN INNOVATION RES INST
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