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Ultrathin hard alloy with high hardness and preparation method thereof

A kind of cemented carbide, a technology of manufacturing method, applied in the field of high-hardness ultrafine cemented carbide and its manufacturing, to achieve the effects of improving service life, reducing porosity, and good wear resistance

Inactive Publication Date: 2012-03-21
CHONGQING ACADEMY OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the tools used in semi-finishing and finishing metal cutting in China are generally YT and YW series cemented carbide tools. The addition of TiC can improve the hardness and red hardness of the tool, but TiC will make the toughness of the alloy low, which is not conducive to processing. Brittle materials and areas where cutting has impact. At the same time, the grains of ordinary YT cemented carbide are relatively thick, and the resulting cutting edge is not sharp enough to manufacture high-precision parts.

Method used

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  • Ultrathin hard alloy with high hardness and preparation method thereof
  • Ultrathin hard alloy with high hardness and preparation method thereof
  • Ultrathin hard alloy with high hardness and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, a high-hardness ultra-fine cemented carbide, the alloy uses ultra-fine carbide WC as the hard phase, Co as the binder phase, VC, NbC and TaC as inhibitors, the composition and weight of the alloy The content is as follows: WC: 90%, Co: 8%, VC: 0.6%, NbC: 0.6%, TaC: 0.8%; wherein the grain size of WC is 0.4 μm, and the grain size of Co is 1.42 μm .

[0027] The above-mentioned high-hardness ultra-fine cemented carbide is prepared by the following steps:

[0028] (1) Wet milling: Add WC, VC, NbC and TaC to the ball mill barrel in proportion, and at the same time add 300ml / kg of absolute ethanol with a purity of 99.99% as the ball mill medium, and add WC, VC, NbC and TaC in the ball mill barrel in proportion At TaC, the ratio of ball to material is 3:1, first ball mill for 20 hours, then add the binder phase Co, and then ball mill for 60 hours, and turn the ball mill cylinder once every 12 hours during the ball milling process;

[0029] (2) D...

Embodiment 2

[0036] Such as figure 1 As shown, a high-hardness ultra-fine cemented carbide, the alloy uses ultra-fine carbide WC as the hard phase, Co as the binder phase, VC, NbC and TaC as inhibitors, the composition and weight of the alloy The content is as follows: WC: 90.2%, Co: 8%, VC: 0.4%, NbC: 0.6%, TaC: 0.8%; wherein the grain size of WC is 0.4 μm, and the grain size of Co is 1.42 μm .

[0037] The above-mentioned high-hardness ultra-fine cemented carbide is prepared by the following steps:

[0038] (1) Wet milling: Add WC, VC, NbC and TaC to the ball mill barrel in proportion, and at the same time add 350ml / kg of absolute ethanol with a purity of 99.99% as the ball mill medium, and add WC, VC, NbC and TaC to the ball mill barrel in proportion At TaC, the ball-to-material ratio is 4.7:1, first ball mill for 34 hours, then add the binder phase Co, and then ball mill for 72 hours, and turn the ball mill cylinder once every 12 hours during the ball milling process;

[0039] (2) ...

Embodiment 3

[0047] Such as figure 1 As shown, a high-hardness ultra-fine cemented carbide, the alloy uses ultra-fine carbide WC as the hard phase, Co as the binder phase, VC, NbC and TaC as inhibitors, the composition and weight of the alloy The contents are as follows: WC: 90.4%, Co: 8%, VC: 0.2%, NbC: 0.6%, TaC: 0.8%; wherein the grain size of WC is 0.4 μm, and the grain size of Co is 1.42 μm .

[0048] The above-mentioned high-hardness ultra-fine cemented carbide is prepared by the following steps:

[0049] (1) Wet milling: Add WC, VC, NbC and TaC to the ball mill barrel in proportion, and at the same time add 400ml / kg of absolute ethanol with a purity of 99.99% as the ball mill medium, and add WC, VC, NbC and TaC in the ball mill barrel in proportion At TaC, the ball-to-material ratio is 6:1, first ball mill for 48 hours, then add the binder phase Co, and then ball mill for 80 hours, and turn the ball mill cylinder once every 12 hours during the ball milling process;

[0050] (2) ...

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Abstract

The invention discloses an ultrathin hard alloy with high hardness and a preparation method thereof. In the alloy, ultrathin carbide WC is taken as a hard phase, Co is taken as a bonding phase, and VC, NbC and TaC are taken as inhibitors; the alloy comprises the following components in percentage by weight: 90-90.4 percent of WC, 8 percent of Co, 0.2-0.6 percent of VC, 0.6 percent of NbC and 0.8 percent of TaC; and the preparation method for the ultrathin hard alloy with high hardness comprises the following steps of: performing wet grinding; drying; doping rubber; pressing; sintering; and cooling. The ultrathin hard alloy with high hardness, which is prepared by the preparation method, has small and thin crystal grains, high temperature hardness and strength and excellent wear resistance, and can be used as an alloy material for refined tools.

Description

technical field [0001] The invention belongs to the technical field of alloy material manufacturing technology, and specifically relates to a high-hardness ultrafine cemented carbide and a manufacturing method thereof. Background technique [0002] Cemented carbide is an alloy material made from refractory metal and bonding metal through powder metallurgy process. It has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance. It is widely used as a tool material. At present, the tools used in semi-finishing and finishing metal cutting in China are generally YT and YW series cemented carbide tools. The addition of TiC can improve the hardness and red hardness of the tool, but TiC will make the toughness of the alloy low, which is not conducive to processing. Brittle materials and areas where cutting has impact. At the same time, the grains of ordinary YT cemented carbide are relativel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/04
Inventor 蒋显全姜爱民
Owner CHONGQING ACADEMY OF SCI & TECH
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