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Ti-containing WC powder based on mass directional adjustment and control, and preparation method and application thereof

A technology of powder and quality, which is applied in the field of powder metallurgy materials to achieve the effects of high sintering activity, enhanced process stability, and high quality stability

Active Publication Date: 2018-01-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The first object of the present invention is to provide Ti-containing WC powder based on quality-oriented regulation and control, to solve the problem of the quality controllability of WC raw materials required for WC-Co cemented carbides with different grain sizes and pure plate crystal structure, and then realize the controllability of the WC powder. Effective Control of Quality Stability of WC–Co Cemented Carbide Series Products with Pure Plate Grain Structure

Method used

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  • Ti-containing WC powder based on mass directional adjustment and control, and preparation method and application thereof
  • Ti-containing WC powder based on mass directional adjustment and control, and preparation method and application thereof
  • Ti-containing WC powder based on mass directional adjustment and control, and preparation method and application thereof

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Effect test

Embodiment 1

[0065] Select ammonium paratungstate with a Fibonacci particle size of 18 μm as the solid W source material, ammonium titanyl oxalate aqueous solution as the Ti source material, and calculate the material ratio based on the mass fraction of Ti in the Ti-containing WC powder being 0.4%, and the addition amount of fatty alcohol polyoxyethylene ether Dosing for 1% of the mass fraction of ammonium paratungstate; in equipment with an ultrasonic generator and stirring function, dilute ammonium titanyl oxalate and fatty alcohol polyoxyethylene ether solution with water to completely bury the ammonium paratungstate to achieve ammonium titanyl oxalate, Permeation and impregnation of ammonium paratungstate with fatty alcohol polyoxyethylene ether aqueous solution; the frequency of ultrasonic waves is 80kHz, the stirring speed is 80 rpm, and the mixing time is 4h. The aqueous mixture of ammonium titanyl oxalate, fatty alcohol polyoxyethylene ether and ammonium paratungstate was dried by a...

Embodiment 2

[0067] Select yellow tungsten with a Fibonacci particle size of 20 μm as the solid W source material, ammonium titanyl oxalate aqueous solution as the Ti source material, and calculate the material ratio according to the mass fraction of Ti in the Ti-containing WC powder as 0.3%, and the addition amount of fatty alcohol polyoxyethylene ether Dosing for 0.5% of the mass fraction of yellow tungsten; in equipment with ultrasonic generator and stirring function, dilute ammonium titanyl oxalate and fatty alcohol polyoxyethylene ether solution with water, so that the solution completely bury yellow tungsten, and realize titanyl oxalate Penetration and impregnation of yellow tungsten with ammonium and fatty alcohol polyoxyethylene ether aqueous solution; the frequency of ultrasonic waves is 80kHz, the stirring speed is 80 rpm, and the mixing time is 4h. A dynamic flash drying method is used to dry the aqueous mixture of ammonium titanyl oxalate, fatty alcohol polyoxyethylene ether and...

Embodiment 3

[0069] Select ammonium paratungstate with a Fibonacci particle size of 20 μm as the solid W source material, ammonium titanyl oxalate aqueous solution as the Ti source material, and calculate the material ratio according to the mass fraction of Ti in the Ti-containing WC powder as 0.23%, and the addition amount of fatty alcohol polyoxyethylene ether is The mass fraction of ammonium paratungstate is 0.8% for batching; in the equipment with ultrasonic generator and stirring function, dilute ammonium titanyl oxalate and fatty alcohol polyoxyethylene ether solution with water to completely bury the ammonium paratungstate to achieve ammonium titanyl oxalate, fat Penetration and impregnation of ammonium paratungstate with alcohol polyoxyethylene ether aqueous solution; the frequency of ultrasonic waves is 80kHz, the stirring speed is 80 rpm, and the mixing time is 4h. A dynamic flash drying method was used to dry the aqueous mixture of ammonium titanyl oxalate, fatty alcohol polyoxye...

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Abstract

The invention discloses Ti-containing WC powder based on mass directional adjustment and control, and a preparation method and application thereof. In the Ti-containing WC powder, Ti grows on the surfaces of WC particles dependently in the form of TiC nanometer dispersed phase and is in an evenly distributed state in the WC powder; and the mass fraction of optimized Ti is 0.2%-0.4%, and the average particle size of the powder is smaller than or equal to 4 [mu]m. The optimized preparation method comprises the steps that an oxalate titanyl ammonium or titanium butoxide solution serves as a liquid Ti source, dipping mixing->dynamic flashing drying->W and Ti co-carbonization and matching technology of a solid W source are conducted through the liquid Ti source with ultrasonic assistance, and the evenly distributed state of Ti in the form of the TiC nanometer dispersed phase in the WC powder and adjustment and control of the Ti content are achieved; and through the raw material type of thesolid W source and the matching technology thereof, the particle size and morphology of the Ti-containing WC powder are adjusted and controlled. According to the Ti-containing WC powder based on the mass directional adjustment and control, and the preparation method and application thereof, the mass controllability of WC raw materials needed by pure plate-like grain structure WC-Co hard alloy is achieved effectively.

Description

technical field [0001] The invention relates to Ti-containing WC powder and its preparation method and application, belonging to the technical field of powder metallurgy materials. Background technique [0002] The invention patent "A high-performance WC-Co recycled cemented carbide and its preparation method" (application number 201610560294.2) discloses a preparation method of a high-performance pure plate-like crystal structure WC-Co recycled cemented carbide. The preparation method is that the WC raw material is composed of electrolytically regenerated WC powder with a Ti content of ≤0.9% and a mass fraction of 90-95% and original ecological ultra-fine WC powder with a mass fraction of 5-10%; Distortion controlled wet ball milling and in-situ Ti-controlled pressure sintering or induced Ti-controlled pressure sintering process. The invention is based on the refinement process customization of mining the intrinsic properties of raw materials, which realizes the efficient ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05B22F1/00B22F9/24
Inventor 张立陈述李凯谢亚熊湘君
Owner CENT SOUTH UNIV
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