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Preparation method of low binder phase fine particle tungsten carbide based cemented carbide

A tungsten carbide-based, hard alloy technology, applied in the field of alloys, can solve the problems of long production cycle and achieve the effect of short production cycle, excellent performance and wide range of raw materials

Active Publication Date: 2018-08-31
昆山长鹰硬质材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for preparing a low-bond phase fine-grained tungsten carbide-based cemented carbide to solve the problem of long production cycle in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of preparation method of tungsten carbide-based cemented carbide with low binder phase fine particles, comprising the following steps:

[0025] Step (1), according to the mass parts, mix 1000 parts of WC mixed powder (WC mixed powder includes WC powder and Cr 3 C 2 Powder, which contains Cr according to mass percentage 3 C 2 1.0%), 6 parts of Co powder and 1.0 parts of carbon black are mixed into a mixture;

[0026] Step (2), mix 1000 parts of the mixture obtained in step (1), 200 parts of alcohol (alcohol purity ≥ 99.99%) and 1500 parts of alloy balls (alloy balls include WC powder and Co powder, according to mass percentage WC powder: Co powder = 96: 4, alloy ball diameter = 10mm) mixed, and put it into the roller ball mill test machine for ball milling, the speed is 30r / min, the ball milling time is 30h, and vacuum-dried through a 320-mesh sieve to obtain low Binder phase sample powder:

[0027] Step (3), the sample powder is sintered by spark plasma sint...

Embodiment 2

[0030] A kind of preparation method of tungsten carbide-based cemented carbide with low binder phase fine particles, comprising the following steps:

[0031] Step (1), according to the mass parts, mix 1000 parts of WC mixed powder (WC mixed powder includes WC powder and Cr 3 C 2 Powder, which contains Cr according to mass percentage 3 C 2 0.5%), 11 parts of Co powder and 1.6 parts of carbon black are mixed into a mixture;

[0032] Step (2), mix 1000 parts of the mixture obtained in step (1), 300 parts of alcohol (alcohol purity ≥ 99.99%) and 3000 parts of alloy balls (alloy balls include WC powder and Co powder, according to mass percentage WC powder: Co powder = 96:4, alloy ball diameter 6mm) mixed, put it into the roller ball mill test machine for ball milling, the speed is 90r / min, the ball milling time is 72h, and vacuum dried through a 320-mesh sieve to obtain low-viscosity Junction sample powder:

[0033] Step (3), the sample powder is sintered by spark plasma sinte...

Embodiment 3

[0036]A kind of preparation method of tungsten carbide-based cemented carbide with low binder phase fine particles, comprising the following steps:

[0037] Step (1), according to the mass parts, mix 1000 parts of WC mixed powder (WC mixed powder includes WC powder and Cr 3 C 2 Powder, which contains Cr according to mass percentage 3 C 2 0.8%), 8 parts of Co powder and 1.5 parts of carbon black are mixed into a mixture;

[0038] Step (2), mix 1000 parts of the mixture obtained in step (1), 200-300 parts of alcohol (alcohol purity ≥ 99.99%) and 2000 parts of alloy balls (alloy balls include WC powder and Co powder, according to Mass percentage WC powder: Co powder = 96:4, alloy ball diameter 4mm) mixed, put it into the roller ball mill test machine for ball milling, the speed is 60r / min, the ball milling time is 50h, and vacuum-dried through a 320-mesh sieve. Low binder phase sample powder:

[0039] Step (3), the sample powder is sintered by spark plasma sintering method, ...

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Abstract

The invention discloses a preparation method of a low-binding-phase fine particle tungsten carbide based hard alloy. The preparation method comprises the following steps that (1) 1,000 parts of WC mixed powder, 6-11 parts of Co powder and 1.0-1.6 parts of carbon black are mixed into a mixture by mass; (2) 1,000 parts of the mixture obtained in the step (1), 200-300 parts of ethyl alcohol and 1,500-3,000 parts of alloying pellets are mixed by mass, and then vacuum drying sieving is carried out after grinding to prepare low-binding-phase sample powder; and (3) a discharge plasma sintering method is adopted for sintering the sample powder, the hardness HRA of a prepared part is larger than or equal to 94.4, the density of the prepared part is larger than or equal to 15.38 g / cm<3>, HV10 of the prepared part is larger than or equal to 2,000, and the relative density of the prepared part is larger than or equal to 98%. The part prepared through the method has excellent performance and is free of holes, inclusions and eta phases, HRA is larger than or equal to 94.4, the density is larger than or equal to 15.38 g / cm<3>, the relative density is larger than or equal to 98%, the service life is remarkably prolonged, and wear resistance is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of alloys, and in particular relates to a preparation method of tungsten carbide-based hard alloy with low binder phase and fine particles. Background technique [0002] The tungsten carbide-based cemented carbide currently produced on the market is mainly produced by conventional methods such as hydrogen sintering, negative pressure sintering, hot isostatic pressing (low pressure), etc., and the cobalt content of cemented carbide produced by these conventional methods is relatively high (≥ 3%), due to the increase of cobalt content, it will affect the hardness and wear resistance (HRA≤94.2) and density (density≤15.10 cm 3 ), so the production life of cemented carbide is not long. And these conventional production methods have the disadvantages of long production cycle and high energy consumption. Contents of the invention [0003] The invention provides a preparation method of tungsten carbide-based cem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/08C22C1/05C22C1/10
CPCC22C1/051C22C29/005C22C29/067C22C29/08
Inventor 黄启君张义涛戴新光刘冰峰
Owner 昆山长鹰硬质材料科技股份有限公司
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