Manufacturing method of cobalt-chromium-molybdenum alloy spherical powder

A cobalt-chromium-molybdenum alloy and spherical powder technology, which is applied in the field of preparation of cobalt-chromium-molybdenum alloy raw material powder, can solve the problems of low yield and high energy consumption, achieve uniform alloy composition, avoid high-temperature operation, and reduce production energy consumption Effect

Pending Publication Date: 2020-01-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They all involve three main integrated steps: melting, atomization, and solidification, with high energy consumption during production and low yields due to the need to control particle size during production

Method used

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  • Manufacturing method of cobalt-chromium-molybdenum alloy spherical powder
  • Manufacturing method of cobalt-chromium-molybdenum alloy spherical powder
  • Manufacturing method of cobalt-chromium-molybdenum alloy spherical powder

Examples

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Effect test

Embodiment 1

[0034] A preparation method of cobalt-chromium-molybdenum alloy spherical powder, comprising the following steps:

[0035] (1) 20g polyurethane, 63g cobalt metal powder, 30g chromium metal powder and 7g molybdenum metal powder are fully mixed in absolute ethanol to obtain a mixed slurry;

[0036] (2) the mixed slurry that step (1) obtains is transferred in the container, is sent in the atmosphere spray drier by peristaltic pump, and spray drying atmosphere is nitrogen (N 2 ), the flow rate of the slurry is 5L / min, and the inlet temperature is 180°C, and pelletizing is carried out to obtain primary spherical particles;

[0037] (3) The primary spherical particles obtained in step (2) are transferred to a 150ml crucible, put into an atmosphere reaction furnace for thermal degreasing, the thermal degreasing atmosphere is argon (Ar), the reaction temperature is 400°C, and the reaction time is 5h, Obtain spherical metal particles;

[0038] (4) Add 100g of calcium oxide (CaO) to t...

Embodiment 2

[0044] A preparation method of cobalt-chromium-molybdenum alloy spherical powder, comprising the following steps:

[0045] (1) 10g polystyrene, 30g cobalt metal powder, 30g chromium metal powder and 30g molybdenum metal powder are fully mixed in absolute ethanol to obtain a mixed slurry;

[0046] (2) the mixed slurry that step (1) obtains is transferred in the container, is sent in the atmosphere spray drier by peristaltic pump, and spray drying atmosphere is nitrogen (N 2 ), the flow rate of the slurry is 50L / min, and the inlet temperature is 200°C, and pelletizing is carried out to obtain primary spherical particles;

[0047] (3) The primary spherical particles obtained in step (2) are transferred to a 150ml crucible, put into an atmosphere reaction furnace for thermal degreasing, the thermal degreasing atmosphere is argon (Ar), the reaction temperature is 600°C, and the reaction time is 3h, Obtain spherical metal particles;

[0048] (4) adding 50 g of calcium oxide (CaO) ...

Embodiment 3

[0055] A preparation method of cobalt-chromium-molybdenum alloy spherical powder, comprising the following steps:

[0056] (1) 30g polyacrylate, 50g cobalt metal powder, 25g chromium metal powder and 25g molybdenum metal powder are fully mixed in absolute ethanol to obtain a mixed slurry;

[0057] (2) the mixed slurry that step (1) obtains is transferred in the container, is sent in the atmosphere spray drier by peristaltic pump, and spray drying atmosphere is nitrogen (N 2 ), the flow rate of the slurry is 20L / min, and the inlet temperature is 160°C, and pelletizing is carried out to obtain primary spherical particles;

[0058] (3) The primary spherical particles obtained in step (2) are transferred to a 150ml crucible, put into an atmosphere reaction furnace for thermal degreasing, the thermal degreasing atmosphere is argon (Ar), the reaction temperature is 500°C, and the reaction time is 5h, Obtain spherical metal particles;

[0059] (4) Add 100g of calcium oxide (CaO) to...

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Abstract

The invention discloses a manufacturing method of cobalt-chromium-molybdenum alloy spherical powder. The manufacturing method comprises the steps of 1, fully mixing a thermoplastic binder, cobalt metal powder, chromium metal powder and molybdenum metal powder in a solvent to obtain mixed slurry; 2, transferring the mixed slurry into an air spray dryer for pelletizing to obtain primary spherical particles; 3, carrying out thermal degreasing on the primary spherical particles to obtain spherical metal particles; 4, adding calcium oxide into the spherical metal particles, and mixing to obtain a mixture; and 5, sintering the mixture, and washing, filtering, drying and grinding the sintered product to obtain the cobalt-chromium-molybdenum alloy spherical powder. In the manufacturing method, theproduct is segregation-free after being subjected to sintering purification, the oxygen content can be controlled to be less than 0.2% by weight, the particle size is less than 75 micrometers, and the powder keeps good spherical morphology at last.

Description

technical field [0001] The invention belongs to the field of alloy materials, in particular to a method for preparing raw material powder for cobalt-chromium-molybdenum alloys. Background technique [0002] Cobalt-chromium-molybdenum alloys have high specific strength, good corrosion resistance, excellent wear resistance and oxidation resistance, and are often used in gas turbines, dental implants and orthopedic implants. Usually this alloy is made by melting pure metals under vacuum by arc or induction melting. Due to the chemical reactivity of metals at high temperatures, the process requires vacuum conditions or an inert atmosphere to prevent the metal from absorbing oxygen, so it is difficult for reaction equipment and The reaction conditions put forward extremely high requirements, which is not conducive to large-scale industrialization. And in order to ensure the uniform composition of the alloy, multiple high-temperature meltings are required, which greatly increases...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B22F3/10B22F1/00C22C19/07C22C30/00
CPCB22F9/08B22F3/1021B22F3/1007C22C19/07C22C30/00B22F2999/00B22F1/103B22F1/065B22F1/10B22F2201/11B22F2201/013
Inventor 夏阳赵金龙董朝望郭学益田庆华谭谌灿
Owner CENT SOUTH UNIV
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