A kind of fine-grained WC-based cemented carbide material and preparation method thereof

A cemented carbide and fine-grained technology, which is applied in the field of cemented carbide, can solve the problems of micropore formation, poor product density, crystal deformation and agglomeration, etc., and achieve the effects of increased strength, short sintering time and high hardness

Inactive Publication Date: 2011-12-28
四川欧曼机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the preparation process of these metals, due to their structure, the deformation and agglomeration of crystals will easily occur during the ball milling process, thereby forming micropores during sintering, resulting in poor product density; therefore, appropriate ball milling must be used in the replacement Process, sintering method and sintering system to obtain high performance WC-Mo(Ni) cemented carbide materials

Method used

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preparation example Construction

[0032] Wherein, the preparation method of the fine-grained WC-based cemented carbide material of the present invention includes the following process steps and contents:

[0033] 1) Initial processing: Weigh the raw materials according to the composition, add the raw materials WC powder, binder powder, grain inhibitor powder and reinforcing agent weighed in proportion to the stirring ball mill tank for stirring, and the stirring time is preferably 5-10 hours ;

[0034] 2) Drying: In a vacuum drying oven, dry the slurry after initial processing, and the drying conditions are preferably at 80-100°C and a vacuum degree of 0-0.33Pa for 6-10 hours;

[0035] 3) Grinding: Grinding the dried powder to form a powder with a pore size below 1 mm;

[0036] 4) Loading: Put the ground powder into the sintering mold and compact it;

[0037] 5) Sintering: Sintering and molding are carried out in a sintering furnace, preferably in a medium frequency induction heating sintering furnace.

Embodiment 1

[0039] The manufacturing method and process flow of the fine-grained WC-based cemented carbide in the embodiment of the present invention are as follows:

[0040] 1) Initial processing: Weigh the raw materials according to the composition, and the raw materials are:

[0041] 0.9μm WC: 85%, Mo: 5%; TiC: 8%; Cr 3 C 2 : 1%; Si: C1%;

[0042] The raw materials weighed in proportion were added into the stirring ball mill tank for stirring, and the stirring time was 8 hours;

[0043] 2) Drying: In a vacuum drying oven, dry the pre-processed slurry for 8 hours under the drying conditions of 90°C and vacuum degree of -0.2Pa;

[0044] 3) Grinding: Grinding the dried powder to form a powder with a pore size below 1 mm;

[0045] 4) Loading: Put the ground powder into the sintering mold and compact it;

[0046] 5) Sintering: Sintering and molding are carried out in a sintering furnace, preferably in a medium frequency induction heating sintering furnace.

[0047] The data of the fin...

Embodiment 2

[0050] The manufacturing method and process flow of the fine-grained WC-based cemented carbide in the embodiment of the present invention are as follows:

[0051] 1) Initial processing: Weigh the raw materials according to the composition, and the raw materials are:

[0052] 1μm WC: 86%, Ni: 5%; VC: 7%; Cr 3 C 2 : 1%; Si: C1%;

[0053] The raw materials weighed in proportion were added into the stirring ball mill tank for stirring, and the stirring time was 8 hours;

[0054] 2) Drying: In a vacuum drying oven, dry the pre-processed slurry for 8 hours under the drying conditions of 90°C and vacuum degree of -0.2Pa;

[0055] 3) Grinding: Grinding the dried powder to form a powder with a pore size below 1 mm;

[0056] 4) Loading: Put the ground powder into the sintering mold and compact it;

[0057] 5) Sintering: Sintering and molding are carried out in a sintering furnace, preferably in a medium frequency induction heating sintering furnace.

[0058]The data of the fine-gr...

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Abstract

A fine-grained WC-based cemented carbide material and a preparation method thereof. The fine-grained WC-based cemented carbide material uses fine-grained WC as a matrix, Mo or Ni as a binder, and TaC, VC, One or more of TiC is a grain inhibitor, Cr3C2 is used as a hardening agent, and C, SiC or rare earth metals are used as a toughening agent. The size of fine-grained WC is 0.8-1μm, and the size of WC can Bringing the improvement of hardness and bending strength, the cemented carbide material provides a substitute for Co, and has high hardness, good toughness, and excellent comprehensive wear resistance.

Description

technical field [0001] The invention relates to the field of hard alloys, in particular to a fine-grained WC-based hard alloy material and a preparation method thereof. Background technique [0002] With the continuous improvement of human living standards, the demand for resources is also increasing, and the operating costs of resources and the new problems brought about by the development of increasingly difficult rock formations have brought about the impact of drilling tools on resistance to fracture and fatigue fracture. The requirements for strength, toughness and wear resistance are getting higher and higher. Therefore, 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. Cost-effective development of new materials with high hardness, high strength, high toughness and high wear resistance. [0003] The existing WC-based cemented carbide has a ser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05
Inventor 李梁
Owner 四川欧曼机械有限公司
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