A preparation method of an ultrafine carbide preformed sipe integral tool body

Abstract

A method for preparing an ultra-fine cemented carbide preformed sipe integral tool body, which consists of the following steps: in the first step, ultra-fine WC, ultra-fine Co, ultra-fine VC and Cr3C2 are mixed evenly after wet-mixed ball milling to obtain The superfine mixture with uniform components; the second step, add the binder in the vacuum kneader, knead until the mixture is uniform, granulate the superfine mixture mixed with the binder, and then put the material in the injection molding machine Heat until the material is in a molten state, and then inject the material into the mold cavity by injection molding, and the ultra-fine hard alloy soft billet is dissolved in water to remove the binder; the third step is in the low-pressure sintering furnace, at 1340 Sintering at a temperature of ~1420°C, pressurized by argon gas at a pressure of 1-10MPa, and preparing an ultra-fine carbide preformed sipe integral tool blank. The preparation method of the invention can greatly reduce the amount of grinding during tool production, greatly improve the production efficiency of the tool, and reduce the waste of tungsten resources.

Description

technology field [0001] The invention relates to a method for preparing an ultrafine hard alloy preformed sipe integral cutter body, which can be used to manufacture standard and non-standard hard alloy integral cutters for processing parts of automobiles, electronics, aviation machinery and other mechanical equipment. Background technique [0002] The overall performance of solid carbide tools made of ultra-fine carbide rods such as milling cutters, reamers, and drills is higher than that of traditional high-speed steel tools. With appropriate coating technology, its comprehensive life is more than 100 times higher than that of high-speed steel tools. For advanced machining centers, cemented carbide tools are a must-have tool, and the elastic modulus of high-speed steel cannot meet its high-speed cutting requirements. In addition, high-speed steel cutting tools waste a lot of precious domestic tungsten and molybdenum resources. At present, the usage of ultra-fine cemented ...

AI Technical Summary

Problems solved by technology

[0003] Due to the high hardness and low toughness of ultra-fine cemented carbide rods, at present, the effective production method of solid carbide tools is to use cubic boron nitride or diamond grinding wheels to sharpen the cutting edge and groove, and most of the working hours of tool processing Consumed in the forming of the sipe, the precious tungsten resources are also lost in vain along with the grinding

In order to improve the processing efficiency and reduce the waste of tungsten resources, some manufacturers try to use the method of grinding and forming the sipes of the cemented carbide blanks before sintering. This method is due to the low strength of the cemented carbide soft blanks, and the ultrafine alloys are easy to oxidize during processing, etc. Disadvantages lead to low product yield, difficult to control product size and product quality, and difficult to apply in batches

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