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And poor toughness.Steel knot cemented carbide material is used to make screw die, steel knot cemented carbide is a new mold material, hard alloy rotary file, is one or several carbide (titanium carbide, tungsten carbide) for the hard phase, so it is appropriate to use insert form in the mold.The ingredients, mixing, pressing, sintering of powder metallurgy materials carbide rotary file, its performance between steel and carbide, it is a combination of high strength, toughness and can undertake all kinds of mechanical processing and hot working, and has the high hardness of the cemented carbide (after quenching and tempering of HRC (68 ~ 73), high wear-resistant cemented carbide rotary file.So.It is very suitable for manufacturing various kinds of molds, but because of the high price of cemented carbide and steel knot cemented carbide rotary file, in order to improve the service life of molds, save materials and reduce costs,
, with alloy steel (such as high-speed steel, chromium molybdenum steel) powder as binder hard alloy rotary file.