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Metal ceramic cutting tool and preparation method thereof

A technology of cermets and cutting tools, which is applied in metal processing equipment, cutting tools for lathes, milling cutters, etc., can solve the problems of high brittleness, low overall performance and service life of cutting tools, and low toughness, and achieve improved oxidation resistance, Improves toughness and prevents formation of brittle phases

Active Publication Date: 2012-08-15
ZHUZHOU JINGGONG CEMENTED CARBIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention solves the technical problems of the cermet cutters in the prior art, such as high brittleness and low toughness, resulting in low overall performance and service life of the cutters

Method used

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  • Metal ceramic cutting tool and preparation method thereof
  • Metal ceramic cutting tool and preparation method thereof

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preparation example Construction

[0019] The present invention also provides a preparation method of the cermet cutter, such as figure 1 shown, including the following steps:

[0020] A. The raw materials are TiCN 30-60wt%, TiB 5-15wt%, VC 0-3wt%, MoC 10-20wt%, Ni 0-10wt%, Cu 0.5-5wt%, WC 0-15wt%, al 2 o 3 5-30wt%, TaC 0-10wt% mixed and ball milled, then dried under vacuum;

[0021] B. After adding a forming agent to the mixture of step A, granulate, pressurize and form to obtain a green body;

[0022] C. Pre-sintering the green body under vacuum to obtain a semi-finished product;

[0023] D. Pressurize the semi-finished product again, carry out vacuum sintering at a temperature higher than that of pre-sintering, and obtain a finished cermet tool after surface treatment.

[0024] In the present invention, in step A, the ball-to-material ratio during ball milling is 5:1-8:1, and the ball milling time is 24-48h. The ball milling can be carried out using a ball mill jar or a ball mill barrel, which is not ...

Embodiment 1

[0033] (1) Ingredients: Weigh raw materials according to the following parts by weight: 40 parts of TiCN, 8 parts of TiB, 2 parts of VC, 14 parts of MoC, 5 parts of Ni, 2 parts of Cu, 6 parts of WC, Al 2 o 3 19 parts, 4 parts of TaC, put the above raw materials into the alloy ball mill barrel in proportion, the ratio of ball to material is 8:1, and use absolute ethanol as the medium liquid ball mill for 24 hours; after the ball milling is completed, dry it under vacuum at a drying temperature of 70°C , The drying time is 8h.

[0034] (2) Add the molding agent PEG to the vacuum-dried system, and then granulate, and then carry out pressure molding with a pressure of 50 tons and a pressure molding time of 2 minutes to obtain a green body.

[0035](3) Pre-sinter the green body at 800°C for 60 minutes in vacuum to obtain a semi-finished tool; then pressurize the semi-finished tool again with a pressure of 70 tons for 4 minutes; then vacuum sinter at 1400°C for 1 hour, and finally...

Embodiment 2

[0038] (1) Ingredients: Weigh raw materials according to the following parts by weight: 42 parts of TiCN, 10 parts of TiB, 1 part of VC, 12 parts of MoC, 5 parts of Ni, 3 parts of Cu, 6 parts of WC, Al 2 o 3 16 parts, 5 parts of TaC, put the above raw materials into the alloy ball mill barrel in proportion, the ratio of ball to material is 6:1, and use absolute ethanol as the medium liquid ball mill for 40h; after the ball mill is completed, dry it under vacuum at a drying temperature of 100°C , The drying time is 8h.

[0039] (2) Add the molding agent PEG to the vacuum-dried system, and then granulate, and then carry out pressure molding with a pressure of 60 tons and a pressure molding time of 1 min to obtain a green body.

[0040] (3) Vacuum pre-sintering the green body at 900°C for 60 minutes to obtain a semi-finished tool; then pressurize the semi-finished tool again with a pressure of 70 tons for 4 minutes; then vacuum sinter at 1500°C for 1 hour, and finally Rough gr...

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Abstract

The invention provides a metal ceramic cutting tool. The metal ceramic cutting tool comprises the following compositions in percentage by weight: 30-60% of TiCN, 5-15% of TiB, 0-3% of VC, 10-20% of MoC, 0-10% of Ni, 0.5-5% of Cu, 0-15% of WC, 5-30% of Al2O3 and 0-10% of TaC. The invention also provides a method for preparing the metal ceramic cutting tool. In the metal ceramic cutting tool provided by the invention, through carrying out appropriate selection on the types and contents of the compositions, hard phases and bonding phases in the metal ceramic cutting tool provided by the invention both can form mutual element diffusion in an interface, and do not have a severe chemical reaction, so that the generation of fragility phases and the deterioration of interface properties are prevented, thereby ensuring that both the overall performance and service life of metal ceramic cutting tool provided by the invention are effectively improved, and the application area is greatly expand.

Description

technical field [0001] The invention belongs to the field of cutting tools, and in particular relates to a cermet tool and a preparation method thereof. Background technique [0002] With the advancement of modern science and technology and the rapid development of industry, traditional tool products have been difficult to meet the needs of material processing, such as the traditional YG, YT series cemented carbide tools are not hard enough when facing high-speed and high-strength materials, and sometimes have impact Fragmentation occurs. In addition, CVD coating equipment is also used to coat a layer of ceramic coating on cemented carbide, but because the coating is very thin, it is easy to wear, and the coating is easy to peel off due to low interface bonding strength, and the equipment investment is large and the process is relatively complicated. [0003] New ceramic tool materials have been widely used in the cutting field in recent years due to their unique properties...

Claims

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Application Information

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IPC IPC(8): B23B27/00B23C5/00C22C29/04C22C29/00C22C1/05
Inventor 陈明
Owner ZHUZHOU JINGGONG CEMENTED CARBIDE
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