Production method of high-toughness microcrystal hard alloys
A technology of cemented carbide and manufacturing method, applied in the field of cemented carbide, can solve the problems of low mixing efficiency, elimination difficulty, uneven mixing, etc., and achieve the effects of reducing the surface roughness of the workpiece, improving the durability, and improving the cutting force of the tool
Active Publication Date: 2014-09-10
HEYUAN ZHENGXIN HARDMETAL CARBIDE
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The invention discloses a production method of high-toughness microcrystal hard alloys. The production method comprises the procedures of burdening, ball milling, palletizing (including sieving drying and wax mixing), pressing and low-pressure sintering (including wax removal preburning), wherein the process of the low-pressure sintering procedure is charging-vacuumizing-wax removal preburning when heating to the temperature of 300-500 DEG C-heat preservation when heating to the temperature of 1100-1300 DEG C-heating to a liquid-phase sintering temperature-Ar charging and pressurization-heat preservation and pressurization-depressurization and cooling-discharging; when ingredients are calculated, the carbon balance value is (+0.15-+0.20)% through analysis and inspection; and the average grain size of WC in the hard alloys reaches (0.25-0.35) microns. The method, provided by the invention, can improve the toughness and wear resistance of the prepared hard alloys, is suitable for producing nonferrous metal cutting blades, prominently enhances the durability of such materials as cast iron, carbon steel and alloy steel, reduces the workpiece surface roughness, and improves the cutter cutting force.
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