Five-membered hard alloy solid solution and preparation method thereof

A cemented carbide and solid solution technology, applied in the field of cemented carbide, can solve the problems of unsatisfactory material properties, difficult to control the C/N ratio precisely, and achieve low oxygen content, long service life, and improved bending strength and toughness. Effect

Inactive Publication Date: 2017-10-13
长沙伟徽高科技新材料有限公司
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Problems solved by technology

After a large number of experiments, scientists found that when WC and TaC are added in the form of (W, Ti, Ta) C solid solution, the cutting performance of TiCN-based cermets can be greatly improved, but the C / N ratio in tool materials is difficult to accurately control , leading to unsatisfactory performance of the material

Method used

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  • Five-membered hard alloy solid solution and preparation method thereof

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Embodiment 1

[0025] In this embodiment, the preparation of the solid solution for five-element cemented carbide includes the following steps:

[0026] (1) Weigh 34.61 parts of WC and 29.33 parts of Ta in parts by weight 2 o 5 , 22.19 parts of TiO 2 And 13.87 parts of carbon black powder, mixed to obtain raw material mixture;

[0027] (2) Using alcohol as the ball milling medium, mix the raw materials evenly by rolling ball milling to obtain a mixture slurry, in which the ball-to-material ratio is 3:1, and the ball milling time is 12 hours;

[0028] (3) Transfer the mixture slurry into a vacuum drying oven, dry it at a pressure of -0.04Mpa and a temperature of 75°C, and wipe the sieve to obtain a mixture powder with a particle size of 0.5~1mm;

[0029] (4) Press the mixture powder into a blank of a certain shape at a pressure of 0.6MPa;

[0030] (5) Transfer the pressed blank into a vacuum reactor, and 2 Atmosphere, carbonization reduction reaction at 1700°C for 2h, and then in N 2 At...

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Abstract

The invention relates to a five-membered hard alloy solid solution, a metal ceramic cutter and a preparation method thereof. The five-membered hard alloy solid solution adopts the chemical formula of (W0.26-0.33Ta0.19-0.25Ti0.44-0.54)(C0.70-0.79N0.20-0.29). The preparation method comprises the following steps: respectively weighing 32-37 parts of WC, 27-32 parts of Ta2O5, 19-24 parts of TiO2 and 10-15 parts of carbon black powder by weight, performing ball milling, then drying to obtain mixed material powder, pressing into a blank, transferring to a vacuum reactor, performing a carbonation reduction reaction for 1.5-2.5h in a N2 atmosphere and at the temperature of 1600-1800 DEG C, and then performing a solid solution reaction for 3-5h in an N2 atmosphere and at the temperature of 1800-1900 DEG C to obtain (W, Ta, Ti)(C, N) five-membered hard alloy solid solution powder. The five-membered hard alloy solid solution prepared by the preparation method provided by the invention is high in solid solubility, low in oxygen content and excellent in performance and can greatly improve the performance of the cutter; a metal ceramic cutter material prepared from the five-membered hard alloy solid solution can obtain excellent mechanical properties.

Description

technical field [0001] The invention belongs to the field of hard alloys, and in particular relates to a solid solution for five-element hard alloys and a preparation method thereof. Background technique [0002] In order to improve the cutting performance of TiCN cermet tool materials, people often add WC and TaC to improve the high-temperature red hardness of cermet tool materials, so as to expand the application range of cermet tools. Generally, WC and TaC are added in the form of single substances. After a large number of experiments, scientists found that when WC and TaC are added in the form of (W, Ti, Ta) C solid solution, the cutting performance of TiCN-based cermets can be greatly improved, but the C / N ratio in tool materials is difficult to accurately control , leading to unsatisfactory performance of the material. Contents of the invention [0003] One of the objectives of the present invention is to provide a new type of five-component (W, Ta, Ti) (C, N) solid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/082C22C29/04C22C1/05
CPCC01B21/0828C22C1/051C22C29/04
Inventor 郭伟张平
Owner 长沙伟徽高科技新材料有限公司
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