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Ultra-fine grain hard alloy and preparation method thereof

A technology of cemented carbide and ultra-fine grain, which is applied in the field of ultra-fine grain cemented carbide and its preparation, can solve the problems of poor anti-adhesive wear performance and low high-temperature hardness, improve high-temperature oxidation resistance, and improve adhesion. Junction hardness, simple and convenient operation

Inactive Publication Date: 2021-06-01
ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, especially the technical problems of low high-temperature hardness and poor anti-adhesive wear performance of the existing ultra-fine-grained cemented carbide materials, and provide a method that ensures the hardness of the alloy, Ultrafine-grained cemented carbide capable of improving the micromechanical properties of the cemented carbide binder phase, improving the crack propagation resistance, and improving the adhesive wear resistance and its preparation method

Method used

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  • Ultra-fine grain hard alloy and preparation method thereof
  • Ultra-fine grain hard alloy and preparation method thereof
  • Ultra-fine grain hard alloy and preparation method thereof

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Embodiment 1

[0041] A kind of ultra-fine-grain cemented carbide of the present invention is mainly prepared from the raw materials of the following mass fractions:

[0042]

[0043]

[0044] In this embodiment, the Fsss particle size of the ultrafine Co powder is less than 0.8 μm, the grain size of the ultrafine WC powder is less than 0.5 μm, and the Cr 3 C 2 The Fsss particle size of the powder is less than 1 μm, and the purity of the Ru powder is not less than 99.9%.

[0045] A preparation method of the ultrafine grain cemented carbide of the present embodiment, comprising the following steps:

[0046] (1) The total weight of ingredients is 200kg, including ultrafine WC powder 184.11kg, ultrafine Co powder 14.0kg, Cr 3 C 2 Powder 0.63kg, Ru powder 1.26kg.

[0047] (2) Add Cr first in the wet mill 3 C 2 Ru powder and Ru powder, after pre-ball milling for 2 hours, add ultra-fine Co powder and ultra-fine WC powder, and then add 4kg of PEG4000 forming agent to obtain a mixture. ...

Embodiment 2

[0061] A kind of ultra-fine-grain cemented carbide of the present invention is mainly prepared from the raw materials of the following mass fractions:

[0062]

[0063] In this embodiment, the Fsss particle size of the ultrafine Co powder is less than 0.8 μm, the grain size of the ultrafine WC powder is less than 0.5 μm, and the Cr 3 C 2 The Fsss particle size of the powder is less than 1 μm, and the purity of the Ru powder is not less than 99.9%.

[0064] A preparation method of the ultrafine grain cemented carbide of the present embodiment, comprising the following steps:

[0065] (1) The total weight of ingredients is 200kg, including 187.40kg ultrafine WC powder, 11.0kg ultrafine Co powder, Cr 3 C 2 Powder 0.99kg, Ru powder 0.61kg.

[0066] (2) Add Ru powder and Cr to the wet mill first 3 C 2 After pre-milling for 2 hours, add ultra-fine WC powder and ultra-fine Co powder, and then add 4kg of PEG4000 molding agent to obtain a mixture. Add 0.35L alcohol per kilogra...

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Abstract

The invention discloses an ultra-fine grain hard alloy and a preparation method thereof. The ultra-fine grain hard alloy is mainly prepared from the following raw materials in percentage by mass: 5%-8% of binding phase powder, 0.20%-0.80% of Cr3C2 powder, 0.25%-0.80% of Ru powder and 90.40%-94.55% of ultra-fine WC powder. According to the preparation method, all the raw materials are subjected to batching, ball milling, granulation, pressing and sintering, and the hard alloy is prepared. The Cr3C2 and the Ru are compositely added, so that the hardness of the alloy is ensured, the micromechanical property of a binding phase of the ultra-fine hard alloy is improved, the crack propagation resistance and the high-temperature oxidation resistance of an alloy material are obviously improved, and the binding wear resistance of the hard alloy is obviously improved; and the technical problem that turning machining of common high-temperature alloy materials in the fields of spaceflight, aviation, automobiles, ships and the like is difficult is solved.

Description

technical field [0001] The invention belongs to the technical field of preparation of ultrafine cemented carbide tool materials, and relates to an ultrafine grain cemented carbide and a preparation method thereof, in particular to an ultrafine grain cemented carbide suitable for turning high temperature alloy materials and its preparation method. Preparation. Background technique [0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy technology. It has the characteristics of high hardness, relatively good strength and toughness, and also has certain heat resistance and resistance Corrosion and other excellent performance. Due to the characteristics of cemented carbide, in the machine tool industry, cemented carbide tools are usually known as "industrial teeth". Its products are mainly used to manufacture cutting tools and wear-resistant parts, and can be widely used in aerospace, automobile, en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05C22C1/10
CPCC22C29/08C22C29/067C22C29/005C22C1/051
Inventor 于涛罗学全王社权温光华
Owner ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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