Preparation method for superfine hard alloy cutter blank with preformed cutter groove

Abstract

The invention provides a preparation method for a superfine hard alloy cutter blank with a preformed cutter groove. The preparation method is characterized by comprising the following steps: step 1, performing wet mixing and ball milling on superfine WC, superfine Co, superfine VC and Cr3C2, and then performing uniform mixing to obtain a superfine mixture of which all the components are uniform; step 2, adding an adhesive into a vacuum kneading machine, performing kneading till the superfine mixture and the adhesive are uniformly mixed, pelletizing the superfine mixture doped with the adhesive, heating the pelletized material in an injection molding machine till the pelletized material enters a molten state, injecting the molten material into a mold cavity by an injection molding mode, and dissolving and removing the adhesive in a superfine hard alloy soft blank in water; and step 3, performing sintering at 1340-1420 DEG C in a low-pressure sintering furnace, and performing argon gas pressurization at 1-10 MPa to prepare the superfine hard alloy cutter blank with the preformed cutter groove. When the superfine hard alloy cutter blank with the preformed cutter groove is produced by adopting the preparation method provided by the invention, the grinding amount during cutter production can be greatly reduced, the cutter production efficiency can be greatly improved, and the waste of tungsten resources can be reduced.

Description

[0001] Involved areas [0002] 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 [0003] 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 ceme...

AI Technical Summary

Problems solved by technology

[0004] 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 edges and grooves, 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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