Method for preparing WC-Co series nano composite hard alloy powder

Abstract

The invention provides a preparation method for a nanocomposite hard alloy powder of WC-Co series. The preparation method comprises the following steps: a front covering board and electrode rods provided with a ball mill pot are respectively connected with both poles of a plasma power; the ball mill pot is provided with a mill ball and W, C, Co material in a certain proportion, and a back cover board is covered when the electrode rods are contacted with W, C and Co materials; the airtight ball mill pot is exhausted to a negative pressure of 0.01 to 0.1Pa by a vacuum valve, or filled with a discharge gas dielectric by the vacuum valve after the ball mill pot is exhausted to negative pressure until the pressure is 0.01 to 0.1MPa; then the ball mill pot is electrified with the plasma power, and discharge parameters are regulated according to the discharge gas and the pressure of the discharge gas, thus being high-energy ball milled for different types of corona discharge plasmas; finally, the mixing powder of W, C and Co is taken out and placed into a thermal source environment for synthesis reaction, and the hard alloy is prepared. The invention can not only save energy, but also improve the synthesis efficiency.

Description

technical field [0001] The invention relates to the field of preparation of ultrafine WC-Co series cemented carbide powder, in particular to a preparation method of WC-Co series nano-composite cemented carbide powder. Background technique [0002] WC-Co series cemented carbide is the earliest and most mature cemented carbide. So far, WC-Co-based cemented carbide is still the most important part of the cemented carbide field. Therefore, the research on WC-Co-based cemented carbide has an important impact on the entire cemented carbide industry. With the development of modern industry, cemented carbide is also developing in the direction of high strength and high hardness (double high), and scientific researchers have accordingly proposed a way to achieve this goal by using ultra-fine or even nano-sized . At the same time, with the increasing awareness of energy saving in the international community and the promulgation of relevant legal measures, the preparation of WC-Co-ba...

AI Technical Summary

Problems solved by technology

However, there is currently no method for preparing WC-Co nanocomposite cemented carbide powders using corona discharge plasma combined with an auxiliary high-energy ball mill.

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