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A high temperature resistant high strength wc-co-ti 3 sic 2 Preparation method of cemented carbide material

A technology of wc-co-ti3sic2 and cemented carbide, which is applied in the field of preparation of high-temperature-resistant and high-strength WC-Co-Ti3SiC2 cemented carbide materials, can solve problems such as limiting applications and shortening the service life of WC-Co cemented carbide

Inactive Publication Date: 2016-10-26
SHAANXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the shortcomings of general metal materials such as high-temperature creep, high-temperature oxidation, and high-temperature softening, the service life of WC-Co cemented carbide is shortened, and its application at higher temperatures (>1000°C) and alternating temperature field conditions is limited. application under

Method used

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  • A high temperature resistant high strength wc-co-ti <sub>3</sub> sic <sub>2</sub> Preparation method of cemented carbide material
  • A high temperature resistant high strength wc-co-ti <sub>3</sub> sic <sub>2</sub> Preparation method of cemented carbide material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First, pre-mix titanium powder, silicon powder, graphite powder and aluminum powder according to the molar mass ratio (2.8:1.3:2.1:0.27) for 1 hour, then ball mill the pre-mixed powder for 12 hours under the protection of argon atmosphere, and the spindle speed of the ball mill is 300 RPM, filling factor 0.35, grinding ball material is cemented carbide. Under the protection of argon atmosphere, the ball-milled powder is sintered to make Ti 3 SiC 2 -TiC composite powder, sintering temperature 1480°C, holding time 2.2 hours, heating rate 5°C / min, cooling rate 15°C / min;

[0027] Take out Ti 3 SiC 2 -TiC composite powder, ground into a fine powder with a particle size of 0.45 μm, and mixed with tungsten carbide powder, cobalt powder, niobium carbide powder and vanadium carbide powder in a mass ratio (2:90:7.7:0.1:0.2) for 1 hour, mixed After ball milling for 14 hours, the spindle speed of the ball mill is 300 rpm, the filling factor is 0.5, and the ball material is ceme...

Embodiment 2

[0030]First, pre-mix titanium powder, silicon powder, graphite powder and aluminum powder according to the molar mass ratio (2.8:1.3:2.1:0.27) for 1 hour, then ball mill the pre-mixed powder for 12 hours under the protection of argon atmosphere, and the spindle speed of the ball mill is 300 RPM, filling factor 0.35, grinding ball material is cemented carbide. Under the protection of argon atmosphere, the ball-milled powder is sintered to make Ti 3 SiC 2 -TiC composite powder, sintering temperature 1480°C, holding time 2.2 hours, heating rate 5°C / min, cooling rate 15°C / min;

[0031] Take out Ti 3 SiC 2 - TiC composite powder, ground into a fine powder with a particle size of 0.45 μm, and mixed with tungsten carbide powder, cobalt powder, niobium carbide powder and vanadium carbide powder in a mass ratio (4:89:6.65:0.15:0.2) for 1 hour, mixed After ball milling for 14 hours, the spindle speed of the ball mill is 320 rpm, the filling coefficient is 0.4, and the ball material ...

Embodiment 3

[0034] First, pre-mix titanium powder, silicon powder, graphite powder and aluminum powder according to the molar mass ratio (2.8:1.3:2.1:0.27) for 1 hour, then ball mill the pre-mixed powder for 12 hours under the protection of argon atmosphere, and the spindle speed of the ball mill is 300 RPM, filling factor 0.4, grinding ball material is cemented carbide. Under the protection of argon atmosphere, the ball-milled powder is sintered to make Ti 3 SiC 2 -TiC composite powder, sintering temperature 1480°C, holding time 2.2 hours, heating rate 5°C / min, cooling rate 15°C / min;

[0035] Take out Ti 3 SiC 2 -TiC composite powder, ground into a fine powder with a particle size of 0.45 μm, and mixed with tungsten carbide powder, cobalt powder, niobium carbide powder and vanadium carbide powder in a mass ratio (6:87:6.45:0.3:0.25) for 1 hour, mixed After ball milling for 14 hours, the spindle speed of the ball mill is 350 rpm, the filling coefficient is 0.35, and the ball material ...

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Abstract

The invention discloses a preparation method of a high temperature-resistant high-strength WC-Co-Ti3SiC2 hard alloy material. The method comprises the following steps: mixing titanium powder, silica powder, graphite powder and aluminum powder according to a molar mass ratio, and performing ball milling; sintering the ball milling powder in a protective atmosphere to obtain Ti3SiC2-TiC composite powder; mixing tungsten carbide powder, cobalt powder, Ti3SiC2-TiC composite powder, niobium carbide powder and vanadium carbide powder according to a mass ratio, and performing ball milling to obtain mixed powder; putting the mixed powder into a mould, and pressing with a single-shaft moulding press to obtain a billet; and sintering the billet material in a protective atmosphere, and forming to finally obtain a WC-Co-Ti3SiC2 hard alloy material. In the method disclosed by the invention, the Ti3SiC2-TiC composite powder replaces Co powder and serves as a binder, and the prepared WC-Co-Ti3SiC2 hard alloy has the characteristics of good mechanical properties at room temperature and high temperature, long life and the like.

Description

technical field [0001] The invention relates to the technical field of new cemented carbide materials, in particular to a high-temperature-resistant and high-strength WC-Co-Ti 3 SiC 2 The preparation method of cemented carbide material. Background technique [0002] Cemented carbide, also known as cermet material, is based on refractory metal hard compound (WC, TiC, TiN or Ti(C,N)) and uses metal as binder. Or high-strength wear-resistant materials prepared by powder metallurgy technology without chips and near net shape. The green manufacturing technology, excellent comprehensive performance and high cutting efficiency of cemented carbide make it the most widely used. Compared with TiC, TiN or Ti(C,N)-based cemented carbide, due to the better wettability of WC and metal binder, it is easy to form a uniform and dense transition phase, and form a high-performance interface to ensure that WC-based Excellent comprehensive performance of cemented carbide, especially high tem...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C1/10C22C29/08
Inventor 董洪峰郭从盛辛思彧熊卓
Owner SHAANXI UNIV OF TECH
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