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Boron-containing titanium carbide nitride based metal ceramic cutter material and preparation technique thereof

A titanium carbonitride and ceramic tool technology, applied in the field of material science, can solve the problems of unsatisfactory tool durability and service life, high cutting temperature, large cutting force, etc., and achieve improved performance indicators, improved surface quality, and improved cutting The effect of speed increase

Active Publication Date: 2008-09-03
ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under high-speed cutting conditions, especially when processing some difficult-to-machine workpieces, due to high cutting temperature, severe work hardening, and high cutting force, ordinary Ti(CN)-based cermet tool materials are difficult to cope with. Therefore, how to improve the high-temperature strength, hardness, red hardness and wear resistance of Ti(CN)-based cermet tool materials under harsh working conditions is very important and urgent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The mass fractions were 0.005% elemental boron, 5.5% WC, 3% TaC, 9% NbC, 10% Mo 2 C, 50% of Ti (CN), 10% of TiC, 6% of Co, 6% of Ni and 0.495% of C are mixed, and all kinds of raw materials are micron powders. Water ethanol is used as the grinding medium, hard metal is used as the grinding body, polyethylene glycol (PEG) and 1.5% polyvinylpyrrolidone (PVP) are added to the total weight of the mixed raw material powder, the ball-to-material ratio is 1: 8, and ball milling The dispersion time is 55 hours, and the slurry dispersed by the ball mill is spray-dried, and the outlet temperature of the nozzle is 90°C; then it is precisely pressed and formed, and the relative density of the green compact is 53%; ℃, the time is 3 hours; vacuum sintering is carried out at 1480 ℃, and the temperature is kept for 70 minutes. After cooling down, the obtained cermet product is ground into a tool of corresponding specification.

[0027] Cutting experiments show that the boron-containin...

Embodiment 2

[0029] The mass fractions were 0.3% titanium diboride, 16.2% WC, 6% TaC, 6% NbC, 5% Mo 2 C, 48% of Ti (CN), 3% of TiC, 8% of Co, 7% of Ni and 0.5% of C are mixed, and all kinds of raw materials are micron powders. Water ethanol is used as the grinding medium, hard metal is used as the grinding body, polyethylene glycol (PEG) and 1.5% polyvinylpyrrolidone (PVP) are added to the total weight of the mixed raw material powder, the ball-to-material ratio is 1: 8, and ball milling The dispersion time is 48 hours. The slurry dispersed by ball milling is spray-dried, and the outlet temperature of the nozzle is 90°C; then it is precisely pressed and formed, and the relative density of the green compact is 54%; The time is 3 hours; at 1480°C in H 2 Sintering under Ar and Ar atmosphere, heat preservation for 70 minutes, after cooling down, grind the obtained cermet product into cutters of corresponding specifications.

[0030] Cutting experiments show that the boron-containing Ti(CN)-b...

Embodiment 3

[0032] Mix the mass fractions of 2.3% molybdenum boride, 15% WC, 2% NbC, 61.7% Ti(CN), 3.8% TiC, 7% Co, 8% Ni and 0.2% C, all raw materials are micron powder , put the mixed raw material powder into a ball mill, use absolute ethanol as the grinding medium, use cemented carbide as the grinding body, add 3% polyethylene glycol (PEG) and 1.5% polyvinylpyrrolidone by the total weight of the mixed raw material powder (PVP), the ball-to-material ratio is 1:9, the ball mill dispersion time is 50 hours, the slurry after the ball mill dispersion is spray-dried, and the nozzle outlet temperature is 90°C; then it is precisely pressed and formed, and the relative density of the green compact is 53%; Pre-burning, the pre-burning temperature is 200-500°C, and the pre-burning time is 3 hours; at 1480°C H 2 Sintering under Ar and Ar atmosphere, heat preservation for 70 minutes, after cooling down, grind the obtained cermet product into cutters of corresponding specifications.

[0033] Cuttin...

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Abstract

The invention discloses a boracic titanium carbonitride based cermet tool bit material and the preparing method thereof. The tool bit material is based on carbonitride as the parent metal, characterized in the tool bit is composed of 0.005% to 0.25% by mass of boron, 6% to 11% by mass of C, 2% to 7% by mass of N, 35% to 70% by mass of Ti, 5% to 20% by mass of W, 0 to 12% by mass of Mo, 0 to 9% by mass of Ta, 1% to 7% by mass of Nb and 6% to 25% by mass of Co and Ni, wherein boron is prepared by adding one or more selected from single substance boron, titanium diboride, molybdenum boride, boron carbide and boric oxide which are in raw material power form. The tool bit material is prepared mainly by mixing the raw material, ball-milling dispersing, press forming, pre-sintering and high-temperature sintering, its high-temperature hardness, high-temperature strength, red hardness and inoxidability are obviously improved, the cutting speed is greatly increased, and the service life is notably entended.

Description

technical field [0001] The invention belongs to the field of material science, and in particular relates to a boron-containing titanium carbonitride (Ti(CN))-based cermet tool material and a powder metallurgy technology for preparing the tool material. Background technique [0002] Due to the high chemical stability between the Ti(CN)-based cermet tool and the processed material, there will be no large friction during the cutting process of the tool, and the temperature of the cutting edge of the tool will not be too high, thus effectively It prevents the interdiffusion of atoms between the Ti(CN)-based cermet tool and the processed material, and significantly improves the anti-bonding wear performance of the Ti(CN)-based cermet tool. An ideal tool material in machining and semi-finishing, filling the WC-based cemented carbide and Al 2 o 3 、Si 3 N 4 A gap for ceramics in the field of high-speed finishing and semi-finishing. However, under high-speed cutting conditions, ...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C30/00C22C1/04B22F3/12
Inventor 周书助唐宏珲张洁尧王社权潘伟胡茂中李屏
Owner ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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