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Good Heat Resistance Of Cemented Carbide Blades
Sep 22, 2017



Cemented carbide blades from simple knife, face milling cutter to a variety of precision, complex, forming tool field.

The performance characteristics of cemented carbide blades are as follows:

① High hardness: cemented carbide blades are made by powder metallurgy by means of hardness and high melting point carbide (called hard phase) and metal binder (called bonding phase). Its hardness of 89~93hra, far higher than high-speed steel, at 5400C, the hardness can still reach 82~87hra, Cemented Carbide Inserts and high-speed steel at room temperature hardness ( 83~86hra) the same. The hardness value of cemented carbide varies with the properties, quantity, grain size and metal bonding phase of carbides, and generally decreases with the increase of bonding metal phase content. In the phase of bonding phase, the hardness of YT alloy is higher than that of YG alloy, and the added TAC (NbC) alloy has high temperature hardness.

② flexural strength and toughness: the flexural strength of common cemented carbide is within the 900~1500mpa range. The higher the metal bonding phase is, the higher the flexural strength is. Cemented Carbide Inserts When the binder content is same, the strength of YG (WC) alloy is higher than that of YT (WC-TIC-CO) alloy, and the strength decreases with the increase of TiC content. Cemented Carbide Inserts Cemented carbide is a brittle material, and its impact toughness is only the 1/30~1/8 of high-speed steel at room temperature.

Application of cemented carbide blades used in ⑶

YG alloys are mainly used in the processing of cast iron, non-ferrous metals and non-metallic materials. Fine grained cemented carbide (e.g. yg3x, yg6x) is higher than the hardness and wear resistance of the grains in the same amount of cobalt, which is suitable for processing some special hard cast iron, Cemented Carbide Inserts austenitic stainless steel, heat, titanium alloy, hard bronze and wearable insulating material.

The outstanding advantages of YT type cemented carbide are high hardness, good heat resistance, high hardness and compressive strength than YG class and good oxidation resistance. Cemented Carbide Inserts Therefore, when the knife is required to have high heat resistance and wear resistance, the TIC content should be selected. YT-type alloy suitable for processing of plastic materials such as steel, but not the processing of titanium alloy, silicon aluminum alloy.

The YW alloy has the properties of YG and YT alloys, and it can be used for processing steel and nonferrous metals. Such alloys, such as the appropriate increase in cobalt content, Cemented Carbide Inserts the strength can be very high, can be used for a variety of difficult processing materials roughing and intermittent cutting.


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