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Hard alloy used for turnout steel rail milling cutter, preparation method for milling cutter blank, and milling cutter blank

A technology of cemented carbide and milling cutters, which is applied in the field of milling cutter blanks, preparation of milling cutter blanks, and cemented carbide. It can solve the problems of lack of cemented carbide materials, etc., so as to ensure cutting performance, superior wear resistance, and smooth cutting effect. Effect

Inactive Publication Date: 2020-09-22
江西中孚硬质合金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Railway turnout rails are usually relatively long, and they have the characteristics of strength, toughness and wear resistance. Therefore, the requirements for the strength and toughness of milling cutters for cutting processing are very important. At present, there is a lack of hard alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The cemented carbide used for turnout rail milling cutter includes the following components by weight percentage: tungsten carbide powder 66.85%, metal cobalt powder 11%, solid solution 21.5% and crystal growth inhibitor 0.65%; wherein, tungsten carbide powder includes Quasi-nanometer tungsten carbide powder, coarse tungsten carbide powder and fine tungsten carbide powder mixed in any proportion; quasi-nanometer tungsten carbide powder has a Fischer particle size of 0.4-0.6μm, coarse tungsten carbide powder has a Fischer particle size of 10-14μm, fine carbide powder The Fischer particle size of tungsten powder is 1-1.1μ, and its total carbon content is 5.90-6.20%; the solid solution is a mixture of CK29 and niobium carbide in any proportion; the inhibitor is a mixture of steel carbide and chromium carbide in any proportion; The Fischer particle size of metal cobalt powder is 1-2.5μ.

[0027] Add alcohol to the raw materials according to the above ratio for wet grinding;...

Embodiment 2

[0031] The cemented carbide used for turnout rail milling cutter includes the following components by weight percentage: tungsten carbide powder 60%, metal cobalt powder 11%, solid solution 28.35% and crystal growth inhibitor 0.65%; wherein, tungsten carbide powder includes Quasi-nanometer tungsten carbide powder, coarse tungsten carbide powder and fine tungsten carbide powder mixed in any proportion; quasi-nanometer tungsten carbide powder has a Fischer particle size of 0.4-0.6μm, coarse tungsten carbide powder has a Fischer particle size of 10-14μm, fine carbide powder The Fischer particle size of tungsten powder is 1-1.1μ, and its total carbon content is 5.90-6.20%; the solid solution is a mixture of CK29 and niobium carbide in any proportion; the inhibitor is a mixture of steel carbide and chromium carbide in any proportion; The Fischer particle size of metal cobalt powder is 1-2.5μ.

[0032] Add alcohol to the raw materials according to the above ratio for wet grinding; s...

Embodiment 3

[0036] The cemented carbide used for turnout rail milling cutter includes the following components by weight percentage: tungsten carbide powder 65.85%, metal cobalt powder 12%, solid solution 21.5% and crystal growth inhibitor 0.65%; wherein, tungsten carbide powder includes Quasi-nanometer tungsten carbide powder, coarse tungsten carbide powder and fine tungsten carbide powder mixed in any proportion; quasi-nanometer tungsten carbide powder has a Fischer particle size of 0.4-0.6μm, coarse tungsten carbide powder has a Fischer particle size of 10-14μm, fine carbide powder The Fischer particle size of tungsten powder is 1-1.1μ, and its total carbon content is 5.90-6.20%; the solid solution is a mixture of CK29 and niobium carbide in any proportion; the inhibitor is a mixture of steel carbide and chromium carbide in any proportion; The Fischer particle size of metal cobalt powder is 1-2.5μ.

[0037] Add alcohol to the raw materials according to the above ratio for wet grinding;...

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Abstract

The invention discloses a hard alloy used for a turnout steel rail milling cutter. The hard alloy comprises the following raw materials in parts by weight: 60-69% of tungsten carbide powders, 9-13% ofcobalt powders, 19-29% of solid solutions and 0.3-0.7% of inhibitor. According to the hard alloy, two trace elements, i.e., chromium carbide and vanadium carbide, are selected and are used for inhibiting the growth of crystal grains, and material cutting performance is guaranteed. The metal cobalt powders at a proper ratio are adopted to guarantee the strength and the toughness level of the material.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to a cemented carbide used for a switch rail milling cutter, a milling cutter blank preparation method and a milling cutter blank. Background technique [0002] Turnout is an important part and key link of railway track, and one of the important safety components in railway transportation. Railway turnout rails are usually relatively long, and they have the characteristics of strength, toughness and wear resistance. Therefore, the requirements for the strength and toughness of milling cutters for cutting processing are very important. At present, there is a lack of hard alloy. Contents of the invention [0003] Aiming at the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a cemented carbide for a turnout rail milling cutter. [0004] Furthermore, the present invention also provides a method for preparing milling cutter bla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05B22F5/00B22F1/00B23C5/00
CPCC22C29/08C22C1/051B22F5/00B23C5/00B22F2005/001B22F1/052
Inventor 李云卿
Owner 江西中孚硬质合金股份有限公司
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