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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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Problems solved by technology

Traditional cemented carbide manufacturing methods have difficulties in eliminating defects in powder and sintering methods, uneven mixing, low mixing efficiency, and conflicting hardness and toughness of the final product

Method used

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  • Production method of high-toughness microcrystal hard alloys

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Embodiment Construction

[0012] The specific embodiment of the present invention is described further below:

[0013] The process of manufacturing microcrystalline cemented carbide in the present invention is divided into: batching → ball milling → granulation (including sieving and drying, waxing process) → pressing → low pressure sintering (including dewaxing and pre-sintering process), the existing in the present invention The vacuum sintering method is different. The pressed product adopts a low-pressure sintering process, which is sintered in an integrated furnace for dewaxing pre-sintering and low-pressure sintering. The specific process is: charging→vacuumizing→heating to 300~500℃ for dewaxing and pre-sintering →Heating up to 1200°C for heat preservation→Heating up to liquid phase sintering temperature→Filling with Ar to pressurize→Insulation and pressurization→Depressurization and cooling→Unloading. At the same time, in the batching process of the present invention, the HCP value of raw materia...

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Abstract

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.

Description

technical field [0001] The invention relates to a cemented carbide, in particular to a method for manufacturing a high-strength and tough microcrystalline cemented carbide. Background technique [0002] Hard materials are composite materials composed of hard particles and binders, including hard alloys, steel-bonded hard alloys, cermets, etc., with high hardness, high strength, wear resistance, good toughness, heat resistance, and corrosion resistance. A series of excellent properties, such as cemented carbide is made of WC, TiC or both stroke compound carbide as the hard phase, with Co, Mo, Ni as the binder phase through high temperature liquid phase sintering, cemented carbide tools, tools Molds and wear-resistant parts are widely used in machinery, metallurgy, mining, petroleum, electronics and other industries. The high-speed production of modern industry is increasingly developing towards high efficiency, high precision, high reliability and long life, and the requirem...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C29/08
Inventor 叶惠明叶少良诸优明
Owner HEYUAN ZHENGXIN HARDMETAL CARBIDE
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