A method capable of improving the magnetic saturation of cemented carbide calcined billets

Abstract

The invention discloses a method capable of improving magnetic saturation of hard alloy pre-sintered blanks. The method comprises the following steps that a proper amount of solid paraffin is taken, and is put into a preset utensil; the utensil where the solid paraffin is put into is placed on a heating device for heating, and is heated until the solid paraffin is melted to be in a liquid state; the hard alloy pre-sintered blanks are put into the utensil in a batch mode, and are completely soaked in the paraffin in the liquid state; the temperature in the soaking process is controlled, and thehard alloy pre-sintered blanks are soaked for a certain time according to the carbon content requirements of the pre-sintered blanks; and when the soaking time is up, the hard alloy pre-sintered blanks are taken out, and then are sintered according to a conventional sintering method in the prior art, so that hard alloy products with improved magnetic saturation and uniform magnetic saturation areobtained. According to the method, through the improvement of the process, the magnetic saturation of the hard alloy pre-sintered blanks can be effectively improved, and the magnetic saturation is uniform and controllable.

Description

technical field [0001] The invention relates to the technical field of hard alloy processing, in particular to a method capable of improving the magnetic saturation of hard alloy calcined billets. Background technique [0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy. Cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance, which basically remain unchanged even at a temperature of 500°C , It still has high hardness at 1000 °C. Cemented carbide is widely used as tool material, such as turning tools, milling cutters, planers, drills, boring tools, etc., for cutting cast iron, non-ferrous metals, plastics, chemical fibers, graphite, glass, stone and ordinary steel, and can also be used for cutting Difficult-to-machine materials such as ...

AI Technical Summary

Problems solved by technology

In this processing method, since the sintering is carried out in a sintering furnace with a certain volume, the concentration of C at each position in the sintering furnace and the length of time the product is in contact with the decomposed C are different, resulting in different carbon content of the final product, thus The magnetic saturation is different, that is, the magnetic saturation of some positions is high, and the magnetic saturation of some positions is low, resulting in uneven magnetic saturation of the cemented carbide pre-sintered billet, and the product is prone to partial carburization and decarburization.

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