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A method for preparing cobalt-chromium-molybdenum alloy powder for metal additive manufacturing

A cobalt-chromium-molybdenum alloy and metal additive technology, which is applied in the field of cobalt-chromium-molybdenum alloy powder and its preparation, can solve the lack of standardization and serialization of cobalt-chromium-molybdenum alloy powder particle size distribution, bulk density and fluidity, and cannot meet Quick and low-cost response to personalized products, affecting the promotion and application of additive manufacturing technology and other issues, to achieve the effect of improving comprehensive mechanical properties, fine grains, and low manufacturing costs

Active Publication Date: 2016-03-23
四川省有色冶金研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is an increasing demand for personalized products in medicine, and traditional manufacturing methods cannot meet the needs of rapid and low-cost response to personalized products
The use of metal additive manufacturing technology to manufacture personalized products can meet the needs of rapid and low-cost response. However, metal additive manufacturing has relatively high performance on the powder particle size, sphericity, oxygen content, fluidity, bulk density and other properties of the formed powder. High requirements, the current cobalt-chromium-molybdenum alloy powder has a high oxygen content, and the particle size distribution, bulk density, fluidity and other properties of the cobalt-chromium-molybdenum alloy powder lack standardization and serialization specifications, which makes cobalt Chromium-molybdenum metal parts have poor performance, which will affect the promotion and application of additive manufacturing technology in the biomedical field

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0024] A method for preparing cobalt-chromium-molybdenum alloy powder for metal additive manufacturing, comprising the following steps in sequence: step 1, mixing metal cobalt, chromium, molybdenum, silicon and manganese and adding them to a vacuum induction furnace at 1400-1500 The mixed melt of cobalt, chromium, molybdenum, silicon and manganese is obtained by smelting at a temperature of ℃, wherein the weight percentage of cobalt, chromium, molybdenum, silicon and manganese used for smelting is: Co: 65%, Cr: 25% %, Mo: 5%, Si: 1%, Mn: 0.8%, and the balance is impurities; step 2, the melt obtained in step 1 is leaked into a leaky bag with a pore diameter of 5 mm at a flow rate of 8 kg / min. In the supersonic atomizer with coupled nozzles, small metal droplets are obtained by atomization. The atomization uses high-purity nitrogen as the atomization gas, the atomization pressure is 1MPa, and the medium ejection speed is 600m / s. The degree of superheat is 10°C; Step 3, placing t...

Embodiment 2

[0027] A method for preparing cobalt-chromium-molybdenum alloy powder for metal additive manufacturing, comprising the following steps in sequence: step 1, mixing metal cobalt, chromium, molybdenum, silicon and manganese and adding them to a vacuum induction furnace at 1400-1500 The mixed melt of cobalt, chromium, molybdenum, silicon and manganese is obtained by smelting at a temperature of ℃. Among them, the weight percentages of cobalt, chromium and molybdenum used for smelting are: Co: 70%, Cr: 15%, Mo: 7%, Si: 0.8%, Mn: 1%, and the balance is impurities; step 2, the melt obtained in step 1 is leaked into a leaking bag with a close-coupled nozzle at a flow rate of 8kg / min through a leak bag with an aperture of 5mm. In a supersonic atomizer, atomize to obtain small metal droplets. Among them, helium is used as the atomizing gas for atomization, the atomization pressure is 0.1MPa, the medium ejection speed is 300m / s, and the superheat of the melt is 1 ℃; Step 3, placing the m...

Embodiment 3

[0030] A method for preparing cobalt-chromium-molybdenum alloy powder for metal additive manufacturing, comprising the following steps in sequence: step 1, mixing metal cobalt, chromium, molybdenum, silicon and manganese and adding them to a vacuum induction furnace at 1400-1500 The mixed melt of cobalt, chromium, molybdenum, silicon and manganese is obtained by smelting at a temperature of ℃. Among them, the weight percentages of cobalt, chromium and molybdenum used for smelting are: Co: 75%, Cr: 20%, Mo: 3%, Si: 0.6%, Mn: 0.8%, and the balance is impurities; step 2, the melt obtained in step 1 is leaked into a leak bag with a close-coupled nozzle at a flow rate of 8kg / min through a leak bag with an aperture of 5mm. In a supersonic atomizer, atomize to obtain small metal droplets. Among them, argon is used as the atomizing gas for atomization, the atomization pressure is 0.6MPa, the medium ejection speed is 500m / s, and the superheat of the melt is 5 ℃; Step 3, placing the met...

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PUM

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Abstract

The invention discloses cobalt-chromium-molybdenum alloy powder for metal additive manufacturing. The cobalt-chromium-molybdenum alloy powder comprises the following components in weight percentage: 65%-75% of Co, 15%-25% of Cr, 3%-7% of Mo, not more than 1% of Si, not more than 1% of Mn, not more than 0.010% of S, not more than 0.010% of P and the balance of impurities. The invention further discloses a preparation method of the cobalt-chromium-molybdenum alloy powder for metal additive manufacturing. The cobalt-chromium-molybdenum alloy powder and the cobalt-chromium-molybdenum alloy powder prepared by adopting the preparation method disclosed by the invention have the performances of low oxygen content, small grain size, high sphericity and the like, and a formed part manufactured by adopting the powder disclosed by the invention has high density and is conductive to popularization and application of a metal additive manufacturing technology in the biomedical field.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a cobalt-chromium-molybdenum alloy powder for metal additive manufacturing and a preparation method thereof. Background technique [0002] Among the existing additive manufacturing methods, metal additive manufacturing technologies for manufacturing metal parts include selective laser melting technology (SelectiveLaserMelting, SLM), direct metal laser sintering technology (DirectMetalLaserSintering, DMLS), selective laser sintering technology (SelectiveLaserSintering, SLS) and Electron Beam Melting (EBM), these technologies are the mainstream metal rapid prototyping technologies that have emerged in recent years, and are one of the latest development forms of Rapid Prototyping & Manufacturing (RP & M). These technologies apply the idea of ​​layered manufacturing, using high-energy laser beams or electron beams to melt the forming materials. After the materials are melted, driv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/07B22F1/00
Inventor 李海英蒋赐进
Owner 四川省有色冶金研究院有限公司
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