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Preparation method of superfine cobalt-nickel powder for hard alloys

A cemented carbide, cobalt-nickel technology, applied in the field of preparation of ultra-fine cobalt-nickel powder, can solve problems such as cobalt powder agglomeration, powder mixing inhomogeneity, cemented carbide hole defects, etc., to provide service life, uniform particle size distribution, Avoid the effect of powder agglomeration

Pending Publication Date: 2020-06-12
JINGMEN GEM NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the process of simply preparing cobalt powder, cobalt powder is prone to agglomeration, resulting in hole defects in the process of preparing cemented carbide, which affects the service life of cemented carbide.
[0004] However, when using cemented carbide cobalt powder, nickel powder, WC and other mixed film, due to the uneven mixing of various powders, it is easy to cause defects in the process of preparing cemented carbide, which affects the performance and service life of cemented carbide.

Method used

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  • Preparation method of superfine cobalt-nickel powder for hard alloys

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Effect test

Embodiment 1

[0030] Embodiment 1 of the present invention provides a kind of preparation method that is used for the superfine cobalt-nickel powder of cemented carbide, and its method is implemented through the following steps:

[0031] Step 1, mix the cobalt chloride solution with a concentration of 60-80g / L and the nickel chloride solution with a concentration of 120-140g / L to form a bottom solution in a metal molar ratio of 1:1.5, and add the bottom solution to the reaction In the kettle, the amount of bottom liquid added is 2~3m 3 , after that, add a sodium carbonate solution with a concentration of 120 to 150 g / L into the reaction kettle by spraying, the mass ratio of the added sodium carbonate solution to the bottom liquid is 1:1.5, and the reaction kettle is kept warm to 40°C Stir for 4h to obtain a cobalt-nickel mixed solution;

[0032] Step 2, transfer the cobalt-nickel composite solution obtained in step 1 into a filter press to remove the mother liquor, wash with pure water at ...

Embodiment 2

[0037] Embodiment 2 of the present invention provides a kind of preparation method that is used for the superfine cobalt-nickel powder of cemented carbide, and its method is implemented through the following steps:

[0038] Step 1, mix the cobalt chloride solution with a concentration of 60-80g / L and the nickel chloride solution with a concentration of 120-140g / L to form a bottom solution in a metal molar ratio of 1:1.4, and add the bottom solution to the reaction In the kettle, the amount of bottom liquid added is 2~3m 3 , after that, add a sodium carbonate solution with a concentration of 120 to 150 g / L into the reactor by spraying, the mass ratio of the added sodium carbonate solution to the bottom liquid is 1:1.4, and the reactor is kept warm to 60°C Stir for 3.8h to obtain a cobalt-nickel mixed solution;

[0039] Step 2, transfer the cobalt-nickel composite solution obtained in step 1 into a filter press to remove the mother liquor, wash with pure water at 72°C for 3 to ...

Embodiment 3

[0044] Embodiment 3 of the present invention provides a kind of preparation method that is used for the superfine cobalt-nickel powder of cemented carbide, and its method is implemented through the following steps:

[0045] Step 1, mix the cobalt chloride solution with a concentration of 60-80g / L and the nickel chloride solution with a concentration of 120-140g / L to form a bottom solution according to the metal molar ratio of 1:1:3, and add the bottom solution Into the reaction kettle, the amount of bottom liquid added is 2~3m 3 , after that, add a sodium carbonate solution with a concentration of 120 to 150 g / L into the reactor by spraying, the mass ratio of the added sodium carbonate solution to the bottom liquid is 1:1.3, and the reactor is kept warm to 80°C Stir for 3h to obtain a cobalt-nickel mixed solution;

[0046]Step 2, transfer the cobalt-nickel composite solution obtained in step 1 into a filter press to remove the mother liquor, wash with pure water at 72°C for 3...

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Abstract

The invention discloses a preparation method of superfine cobalt-nickel powder for hard alloys. The preparation method comprises the steps that a cobalt chloride solution and a nickel chloride solution are mixed into a base solution in proportion, the base solution is added into a reaction still; then a sodium carbonate solution is added into a reaction still by adopting a spraying mode, stirringis carried out at 40-80 DEG C for 3-4 hours, and a cobalt-nickel mixed solution is obtained; then filter pressing processing and washing and slurrying are carried out to obtain cobalt-nickel mixed slurries; and finally, high-temperature reduction is carried out to directly obtain the superfine cobalt-nickel powder. Therefore, the problem of powder aggregation when cobalt powder is simply preparedcan be solved; meanwhile, the prepared superfine cobalt-nickel powder is uniformly distributed, is small in grain size, and can be directly used for preparing the hard alloys; and the problem that defects appear to a hard alloy tool due to nonuniform mixing is solved, and the service life of the hard alloys is prolonged.

Description

technical field [0001] The invention belongs to the technical field of preparation of cobalt-nickel composite powder, and in particular relates to a preparation method of ultrafine cobalt-nickel powder for hard alloy. Background technique [0002] In the field of diamond tools and cemented carbide materials, cobalt-nickel alloy powders are widely used due to their excellent bonding properties and strength properties. [0003] In the process of simply preparing cobalt powder, cobalt powder is prone to agglomeration, resulting in hole defects in the process of preparing cemented carbide, which affects the service life of cemented carbide. [0004] However, when using cemented carbide cobalt powder, nickel powder, WC and other mixed film, due to the uneven mixing of various powders, it is easy to cause defects in the process of preparing cemented carbide, which affects the performance and service life of cemented carbide. Contents of the invention [0005] In order to overco...

Claims

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Application Information

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IPC IPC(8): B22F9/26
CPCB22F9/26
Inventor 许开华陈龙吴兵王超苏陶贵
Owner JINGMEN GEM NEW MATERIAL
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