TiCN-base metal ceramic tool material and its microwave sintering process

A ceramic tool and microwave sintering technology, which is applied in the field of microwave sintering material science, can solve problems such as insufficient hardness, achieve the effects of improving strength and fracture toughness, inhibiting decomposition, and reducing production costs

Inactive Publication Date: 2015-09-02
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The literature (Yan Dike et al. Preparation of ultrafine TiCN-based cermets and research on microwave sintering process[J]. Thermal Processing Technology, 2010,39(20):73-75) introduced a method of preparing TiCN by microwave sintering technology. Based on the scheme of cermet, under the sintering condition of 1500°C for 30min, a TiCN-based cermet material with fine grain and uniform microstructure was prepared. is also insufficient

Method used

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  • TiCN-base metal ceramic tool material and its microwave sintering process

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Experimental program
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Effect test

Embodiment 1

[0022] According to the mass percentage of TiCN 69%, Co and Ni 12%, WC 15%, Mo 4%, the prepared mixed powder was mixed by ball milling with absolute ethanol for 48 hours, and the concentration of 5wt% poly Ethylene alcohol aqueous solution granulation, the mass ratio of ball to material is 8:1; after ball milling, drying and grinding, the ground powder is dry-pressed, the pressure is 250MPa, and the holding time is 3min; the formed sample is placed in a microwave sintering furnace During the process, turn on the vacuum pump, evacuate the air pressure in the furnace to a vacuum state, and then fill it with 30kPa nitrogen. Turn on the microwave power supply for heating, heat the sample to 650°C at a heating rate of 80°C / min and hold it for 10 minutes, then heat it to 1550°C at a heating rate of 30°C / min, keep it at this temperature for 10 minutes, and then heat it with the furnace Cool to room temperature. After testing, the Vickers hardness of the material is 15.65GPa (HV20), ...

Embodiment 2

[0024] By mass percentage TiCN 62%, Co and Ni 15%, WC 15%, Mo 2 C 8% for batching, the prepared mixed powder was ball milled with absolute ethanol as the medium for 40 hours, and 5 wt% polyvinyl alcohol aqueous solution was added to granulate 2 hours before the end of ball milling, and the mass ratio of ball to material was 8:1; after ball milling Drying and grinding, the ground powder is dry-pressed, the pressure is 300MPa, and the holding time is 2min; the formed sample is placed in the microwave sintering furnace, the vacuum pump is turned on, the air pressure in the furnace is pumped to a vacuum state, and then filled with 30kPa of nitrogen. Turn on the microwave power supply for heating, heat the sample to 650°C at a heating rate of 80°C / min and hold it for 10 minutes, then heat it to 1550°C at a heating rate of 30°C / min, keep it at this temperature for 10 minutes, and then heat it with the furnace Cool to room temperature. After testing, the Vickers hardness of the mat...

Embodiment 3

[0026] According to the mass percentage of TiCN 62%, Co and Ni 15%, WC 15%, Mo 8%, the prepared mixed powder was mixed by ball milling with absolute ethanol for 36 hours, and 5 wt% poly Ethylene alcohol aqueous solution granulation, the mass ratio of ball to material is 9:1; after ball milling, dry and grind, dry press the ground powder, the pressure is 300MPa, and the pressure holding time is 2min; the formed sample is placed in a microwave sintering furnace During the process, turn on the vacuum pump, evacuate the air pressure in the furnace to a vacuum state, and then fill it with 30kPa nitrogen. Turn on the microwave power supply for heating, heat the sample to 800°C with a heating rate of 100°C / min and keep it for 10 minutes, then heat it to 1550°C at a heating rate of 30°C / min, keep it at this temperature for 0 min, and then heat it with the furnace Cool to room temperature. After testing, the Vickers hardness of the material is 15.06GPa (HV20), and the fracture toughne...

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Abstract

The invention discloses TiCN-base metal ceramic tool material and its microwave sintering process. The TiCN-base metal ceramic tool material comprises, by weight, 55% to 75% of TiCN, 6% to 24% of Ni, 8% to 15% of WC, and 4% to 15% of Mo2C or Mo4. The 2.45GHz frequency microwave medium is used as a heating source; under the nitrogen atmosphere, the material is sintered. The TiCN-base metal ceramic tool material is higher in compactness, rigidity and breaking tenacity, meets the application requirements and is simple to sinter, high in productivity and low in cost.

Description

technical field [0001] The invention belongs to the technical field of microwave sintering materials, and relates to a TiCN-based cermet tool material and a microwave sintering process thereof. Background technique [0002] TiCN-based cermet is a ceramic tool material developed on the basis of TiC-based cermet. Compared with traditional WC-Co cemented carbide, it has higher red hardness, wear resistance, heat resistance, and Crescent wear ability and high temperature strength, at the same time, its toughness is better than the traditional A1 2 o 3 Base ceramic cutter material is good. The emergence of cermets, after overcoming the shortcomings of insufficient hardness of cemented carbide tools, has also obtained high toughness that is difficult to achieve with traditional ceramic tools, thereby filling the gap between the two. In terms of cutting processing, the friction coefficient between TiCN-based cermets and metals is lower, and the surface quality of workpieces proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/04C22C1/04
Inventor 程寓胡瀚澎徐玉高
Owner NANJING UNIV OF SCI & TECH
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