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Hard alloy

A cemented carbide and cemented carbide substrate technology, applied in the field of metal alloy materials, can solve the problems of poor toughness, high price, and high brittleness, and achieve the effects of increasing hardness, reducing usage, and improving bending strength and impact toughness.

Inactive Publication Date: 2014-01-29
CHANGSHU LIONY METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, cemented carbide is replacing other tool materials in more occasions due to its excellent performance. The more commonly used cemented carbide tool material is tungsten carbide-based cemented carbide, but tungsten carbide-based cemented carbide has high wear resistance, but toughness Poorer, higher brittleness, more expensive

Method used

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Effect test

Embodiment 1

[0021] A hard alloy, comprising a cemented carbide substrate composed of metal carbide powder and a metal binder, also includes a coating, the coating is coated on the cemented carbide substrate, and the metal carbide powder is mainly Composed of tungsten carbide and a small amount of vanadium carbide, chromium carbide, titanium carbide, tantalum carbide and niobium carbide, its mass percentage is tungsten carbide 48%, vanadium carbide 6%, chromium carbide 8%, titanium carbide 9%, tantalum carbide 10% and Niobium carbide 5%; the metal binder is cobalt with a content of 14%.

[0022] The grain size of the metal carbide powder is 0.1-0.8 μm.

[0023] The grain size of tungsten carbide is 0.2 μm.

[0024] The coating is a diamond CVD coating, and the diamond CVD coating is ultrafine crystal, with an average particle size of less than 0.8 μm. The hardness HRA of the cemented carbide is 96, and the bending strength is 750MPa.

Embodiment 2

[0026] A hard alloy, comprising a cemented carbide substrate composed of metal carbide powder and a metal binder, also includes a coating, the coating is coated on the cemented carbide substrate, and the metal carbide powder is mainly Composed of tungsten carbide and a small amount of vanadium carbide, chromium carbide, titanium carbide, tantalum carbide and niobium carbide, its mass percentage is 45% tungsten carbide, 9% vanadium carbide, 7% chromium carbide, 8% titanium carbide, 10% tantalum carbide and Niobium carbide 5%; the metal binder is cobalt with a content of 16%.

[0027] The grain size of the metal carbide powder is 0.1-0.8 μm.

[0028] The grain size of tungsten carbide is 0.1 μm.

[0029] The coating is a diamond CVD coating, and the diamond CVD coating is ultrafine crystal, with an average particle size of less than 0.8 μm. The hardness HRA of the cemented carbide is 97, and the bending strength is 760MPa.

[0030] The invention discloses a cemented carbide. ...

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Abstract

The invention discloses a hard alloy, which comprises a hard alloy matrix and further comprises a coating, wherein the hard alloy matrix is composed of metal carbide powder and a metal binder; the coating is coated on the hard alloy matrix; the metal carbide powder mainly comprises the following components in mass percentage: 40-50% of tungsten carbide, 5-10% of vanadium carbide, 3-8% of chromium carbide, 5-9% of titanium carbide, 6-11% of tantalum carbide, and 2-5% of niobium carbide, wherein the metal binder is cobalt the content of which is 12-18%. By means of the manner, the hard alloy disclosed by the invention has the characteristics of being low in cost, high in hardness, intensity, toughness and abrasive resistance, low in wear rate while cutting at high speed, and good in oxidation resistance, heat resistance and chemical stability and is applied to manufacturing cutter materials for high precision processing; in addition, the service life of cutters can be prolonged.

Description

technical field [0001] The invention relates to the field of metal alloy materials, in particular to a hard alloy. Background technique [0002] With the development of science and technology and industry, higher requirements are put forward for materials, such as higher strength, high temperature resistance, high pressure, low temperature, corrosion resistance, wear and other special physical and chemical properties. [0003] Cemented carbide is produced by powder metallurgy and is a composite material composed of a refractory metal compound (hard phase) and a binder metal (bond phase). Cemented carbide is characterized by high hardness, good thermal hardness, and excellent wear resistance. The cutting speed can be increased by 4-7 times compared with high-speed steel. When used as a tool material, its wear resistance is 15-20 times that of high-speed steel, and the service life can be increased by 5 times. -80 times. [0004] Therefore, cemented carbide is replacing othe...

Claims

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Application Information

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IPC IPC(8): C22C29/08C22C30/00B32B15/04
Inventor 陈保云
Owner CHANGSHU LIONY METALS
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