Preparation method of titanium boride compounded titanium carbide-based metal ceramic cutter material

Abstract

The invention relates to a novel material and particularly relates to a preparation method of a titanium boride compounded titanium carbide-based metal ceramic cutter material. The titanium boride compounded titanium carbide-based metal ceramic cutter material comprises the following primary powder in percentage by mass: 58.22wt%-60.11wt% of TiC, 33.78wt%-34.89wt% of TiB2, 0-3.55wt% of Mo and 4.45wt%-8wt% of Ni. A preparation process comprises the following steps: respectively filling a ball milling cylinder with TiC and TiB2 in a formula, and carrying out wet milling for 48 hours in alcohol by virtue of a tungsten carbide ball; carrying out vacuum drying at 100-120 DEG C, filtering by virtue of a 100-mesh sieve, and packaging for later use; weighing primary powder Ni and Mo and ball-milled TiC and TiB2 by mass, and mixing, carrying out wet milling for 48 hours, carrying out vacuum drying, and packaging for later use; weighing mixed powder by weight in a cutter preparation process, adding the mixed powder into a graphite mold, and carrying out vacuum sintering; heating from the room temperature to 700 DEG C at a heating rate of 50DEG C/min, and maintaining the temperature for 2min; and heating from 1450 DEG C to 1650 DEG C at the heating rate of 50DEG C/min, and carrying out thermal pressure sintering forming when a pressure of 32MPa is applied and the temperature is maintained for 30min. The preparation process is simple, stable, low in cost and high in efficiency; when the high hardness of the prepared cutter material is preserved, the bending strength and the fracture toughness are improved; and the prepared cutter material can be applied to other high-temperature wear-proof structural components.

Description

1. Technical field [0001] The invention relates to the technical field of new materials, in particular to a preparation method of titanium boride composite titanium carbide-based cermet tool material. 2. Background technology [0002] Cermet not only maintains the high strength, high hardness, wear resistance, high temperature resistance, oxidation resistance and chemical stability of ceramics, but also has good toughness and plasticity. It is a very important high-performance structural material. Among them, titanium carbide (TiC)-based cermet is a kind of cermet tool material that has developed rapidly in recent years. The melting point of TiC (3250 ° C) is higher than that of WC (2630 ° C), good wear resistance, and the density is only 1 / 3 of WC. , the oxidation resistance is far superior to WC. Initially TiC-based cermets were used to fill WC-Co-based cemented carbide and A1 2 o 3 The gap between ceramic tool materials is suitable for high-speed finishing tools. Later...

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Problems solved by technology

Each of the above preparation processes has its merits, but the preparation equipment and process are complicated, the cost is high, and the prepared TiC-TiB 2 The comprehensive mechanical properties ...

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