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A kind of tic0.7n0.3-hfb2 superhard material and its preparation method

A superhard material, ni4%-8% technology, applied in the field of high-hardness ceramic knives, can solve the problems of unfavorable industrialization, complex process, and reduced mechanical properties, and achieve the effects of industrial production, process simplification, and low cost

Active Publication Date: 2018-05-25
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of reduced mechanical properties, complicated process and unfavorable industrialization of existing TiCN-based ceramic materials when compounding, the present invention provides a hot-pressed sintered TiC 0.7 N 0.3 -HfB 2 Superhard material and preparation method

Method used

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  • A kind of tic0.7n0.3-hfb2 superhard material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] a TiC 0.7 N 0.3 -HfB 2 Superhard materials are composed of the following raw materials in mass percentage: TiC 0.7 N 0.3 77%, HfB 2 15%, Ni 4%, Mo 4%.

[0015] a TiC 0.7 N 0.3 -HfB 2 The preparation method of the superhard material adopts the following steps: a. Put the mixed powder of each raw material into a horizontal pot mill and ball mill, and sieve it after ball milling with cemented carbide balls; b. Put the sifted raw material into the upper and lower closed Graphite container, and then put it into a high-temperature sintering furnace; c. Keep it warm for 15 minutes under the conditions of a heating rate of 10°C / min, a pressure of 30MPa, and a sintering temperature of 1550°C to obtain TiC 0.7 N 0.3 -HfB 2 super hard material.

Embodiment 2

[0017] a TiC 0.7 N 0.3 -HfB 2 Superhard materials are composed of the following raw materials in mass percentage: TiC 0.7 N 0.3 82%, HfB 2 10%, Ni 6%, Mo 2%.

[0018] a TiC 0.7 N 0.3 -HfB 2 The preparation method of the superhard material adopts the following steps: a. Put the mixed powder of each raw material into a horizontal pot mill and ball mill, and sieve it after ball milling with cemented carbide balls; b. Put the sifted raw material into the upper and lower closed Graphite container, and then put it into a high-temperature sintering furnace; c. Keep it warm for 30 minutes under the conditions of a heating rate of 10°C / min, a pressure of 30MPa, and a sintering temperature of 1650°C to obtain TiC 0.7 N 0.3 -HfB 2 super hard material.

Embodiment 3

[0020] a TiC 0.7 N 0.3 -HfB 2 Superhard materials are composed of the following raw materials in mass percentage: TiC 0.7 N 0.3 66%, HfB 2 20%, Ni 8%, Mo 6%.

[0021] a TiC 0.7 N 0.3 -HfB 2 The preparation method of the superhard material adopts the following steps: a. Put the mixed powder of each raw material into a horizontal pot mill and ball mill, and sieve it after ball milling with cemented carbide balls; b. Put the sifted raw material into the upper and lower closed Graphite container, and then put it into a high-temperature sintering furnace; c. Keep it warm for 45 minutes under the conditions of a heating rate of 10°C / min, a pressure of 30MPa, and a sintering temperature of 1750°C to obtain TiC 0.7 N 0.3 -HfB 2 super hard material.

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Abstract

The invention relates to the field of high-hardness ceramic cutting tools, specifically a TiC0.7N0.3‑HfB2 superhard material and a preparation method thereof, which solve the problems of reduced mechanical properties, complicated process and unfavorable industrialization when existing TiCN-based ceramic materials are combined. question. A TiC0.7N0.3-HfB2 superhard material is composed of the following raw materials in mass percentage: TiC0.7N0.3 66%-82%, HfB2 10-20%, Ni 4-8%, Mo 2-6% . The invention ensures the high hardness of the material on the basis of maintaining the improvement of the fracture toughness and bending strength after the material is compounded, and utilizes the vacuum hot pressing sintering method, the process is simplified, the cost is low, it is beneficial to industrial production, and it is suitable for cutting processing High hardness material.

Description

technical field [0001] The invention relates to the field of high-hardness ceramic cutting tools, specifically a TiC 0.7 N 0.3 -HfB 2 Superhard material and its preparation method. Background technique [0002] The multi-component composite method can improve the sintering performance of TiCN (titanium carbonitride)-based cermet materials, reduce its sintering temperature, make it possible to achieve densification at a lower temperature, and proper material composition, grain growth Inhibitors and sintering processes can refine the grains, thereby improving the mechanical properties of the material. TiCN-based cermets have high hardness (generally up to 91-93.5HRA), good chemical stability, high oxidation resistance, and high heat resistance. They have hardness and heat resistance close to non-metallic ceramics, and their resistance The bending strength is higher than that of non-metallic ceramics, and it is used to make tool materials for high-speed finishing, semi-fini...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/04C22C1/05
CPCC22C1/051C22C29/04
Inventor 宋金鹏高姣姣梁国星安晶高杰姜龙凯曹磊谢俊彩王时英吕明
Owner TAIYUAN UNIV OF TECH