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Novel WC-based hard alloy material and preparation method thereof

A cemented carbide and high-hardness technology, applied in the field of new high-performance WC-based cemented carbide materials and their preparation, can solve the problems of inability to obtain high-hardness cemented carbide materials, and achieve excellent oxidation resistance and corrosion resistance of materials , Improve the strength and fracture toughness, and improve the comprehensive wear resistance of materials

Active Publication Date: 2010-11-24
CHINA UNIV OF GEOSCIENCES (BEIJING) +2
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Furthermore, the traditional WC-Co cemented carbide can be improved by hot pressing sintering, hot isostatic pressing sintering and other methods to improve the strength, toughness and hardness of the material at the same time. In the process of c-BN doping cemented carbide, c-BN is prone to transition from a high-hardness cubic phase to a low-hardness hexagonal phase, and c-BN-doped high-hardness cemented carbide materials cannot be obtained

Method used

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  • Novel WC-based hard alloy material and preparation method thereof
  • Novel WC-based hard alloy material and preparation method thereof
  • Novel WC-based hard alloy material and preparation method thereof

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preparation example Construction

[0035] The preparation method comprises the following process steps and contents:

[0036] 1) Weighing: Weigh raw materials according to the composition designed for the new WC-based hard alloy, and add 0-10% (mass fraction) of organic dispersant and binder.

[0037] 2) Mixing: Add the raw materials WC powder, metal binder powder, and grain inhibitor powder weighed in proportion to the high-energy stirring ball mill tank, and add organic dispersant and adhesive, WC grinding balls and Water ethanol solvent, stirring and ball milling for 24 to 48 hours. Then add hardening agent in proportion to ball milling for 0.5-2 hours, then add toughening agent and ball mill for 20-60 minutes.

[0038] 3) Drying: In a vacuum drying oven, dry the finely mixed slurry for 6-60 hours at 10-100° C. and a vacuum degree of 0-0.33 Pa.

[0039] 4) Grinding and sieving: Grinding the dried powder and selecting a sieve with a suitable aperture for sieving.

[0040] 5) Loading: Put the weighed raw ma...

Embodiment 1

[0044] The manufacturing method and process flow of the novel WC-based cemented carbide in the embodiment of the present invention are as follows:

[0045] 1) Weighing; Submicron WC powder by mass fraction 79%, 7% Mo powder, 12% surface Mo-coated diamond powder, 1% NdC, 1% Mo-coated SiC nano whiskers, and additional 5% organic dispersant and binder Weigh each reagent.

[0046] 2) Mixing: Add the weighed raw material WC powder, metal binder powder, grain inhibitor powder, organic dispersant and binder into a high-energy stirring ball mill tank, and add 10 times the mass of WC grinding balls and 5 times the mass of anhydrous ethanol solvent, stirred and ball milled for 48 hours. Then add the weighed hardening agent and ball mill for 1 hour, then add the toughening agent and ball mill for another 20 minutes.

[0047] 3) Drying: In a vacuum drying oven, dry the finely mixed slurry for 30 hours at 40° C. and a vacuum degree of −0.33 Pa.

[0048] 4) Grinding and sieving: the drie...

Embodiment 2

[0054] The manufacturing method and process flow of the novel WC-based cemented carbide in the embodiment of the present invention are as follows:

[0055] 1) Weighing; by mass fraction 79% submicron WC powder, 7% Ni powder, 12% surface Ni-coated diamond powder, 1% TaC powder, 1% Ni-plated SiC nano-whiskers, and additional 5% organic dispersant and binder Weigh out each reagent.

[0056] 2) Mixing: Add the weighed raw material WC powder, metal binder powder, grain inhibitor powder, organic dispersant and binder into a high-energy stirring ball mill tank, and add 10 times the mass of WC grinding balls and 5 times the mass of anhydrous ethanol solvent, stirred and ball milled for 48 hours. Then add the weighed hardening agent and ball mill for 1 hour, then add the toughening agent and ball mill for another 20 minutes.

[0057] 3) Drying: In a vacuum drying oven, dry the finely mixed slurry at 35° C. and a vacuum degree of −0.33 Pa for 40 hours.

[0058] 4) Grinding and sievin...

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Abstract

The invention relates to a novel high-performance WC-based hard alloy material and a preparation method thereof, and belongs to high-technology structural ceramics and the application field thereof. The high-performance WC-based hard alloy material in the invention takes 20 to 80 mass percent of submicron / nanometer WC powder as a matrix, 2 to 20 mass percent of metal Mo and metal Ni which have high chemical stability at a high temperature and rare earth as a binder, is added with 0.1 to 5.0 mass percent of crystal particle inhibitor, 10 to 80 mass percent of high-hardness material diamond or cubic boron nitride micro-powder as a hardening agent, and 0.5 to 15 mass percent of SiC nanostructure and the like as a toughing agent, and is prepared by fast sintering technology, in particular by discharge plasma sintering or medium frequency induction heating sintering. A sintered body has the characteristics of fine crystal particles, high hardness, strength and flexibility and high comprehensive abrasive resistance, is particularly suitable for preparing geological drilling machines and tools used under heavy load conditions, and also can be used for preparing high-performance machined cutting tools, moulds and the like.

Description

technical field [0001] The invention relates to a novel high-performance WC-based cemented carbide material and a preparation method thereof, belonging to the field of high-tech structural ceramics and its application. Background technique [0002] With the continuous increase of human demand for resources, resource production is faced with rising operating costs and the need to solve problems such as opening up new reserves in increasingly difficult rock formations. Harsh drilling conditions affect the strength of drilling tools against cracking and fatigue fractures, The requirements for toughness and wear resistance are getting higher and higher. It is necessary to develop wear-resistant materials with both high hardness and high strength, as well as new parts and new tools to adapt to the use under extreme conditions. It is required to develop new types of high hardness and high strength at low cost. , high toughness and high wear resistance material. [0003] Tradition...

Claims

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Application Information

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IPC IPC(8): C22C29/08C22C1/04
Inventor 彭志坚荣会永王成彪付志强岳文于翔刘宝林杨甘生
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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