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Carbide blade and preparation method thereof

A cemented carbide blade and cemented carbide technology, applied in the field of cemented carbide blades, can solve the problems of low versatility of cutting blades, achieve excellent edge strength and impact resistance, improve precise control, and improve mechanical properties

Inactive Publication Date: 2019-09-06
台州市锐安硬质合金工具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned literature only optimizes the performance of the cutting insert from one angle alone, and the cutting insert is not versatile and has certain limitations.

Method used

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  • Carbide blade and preparation method thereof
  • Carbide blade and preparation method thereof
  • Carbide blade and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A cemented carbide blade of the present invention, the blade model is WNMG080408. The composition of the cemented carbide insert matrix in this embodiment is shown in Table 1. 5.6wt.% Co metal is used as the binder phase, and WC and titanium-containing cubic phase compounds are used as the hard phase. The cemented carbide insert substrate has a surface structure lacking titanium-containing cubic phase compounds whose average binder phase content is 1.5 times the nominal Co binder phase content, and the thickness of the surface structure is 15 μm. The average particle size of the titanium-containing cubic phase compound in the alloy is 2.0 μm, the atomic ratio of Ti / (Ti+Ta+Nb) is 0.6, and the atomic ratio of N / Ti is 0.17. The average grain size of the titanium-containing cubic phase is 0.90 μm. Tungsten carbide (WC) grain distribution has a bimodal structure, one of which is 0.5 μm and the other is 2.0 μm. The C / W atomic ratio of the binder phase in the surface gradie...

Embodiment 2

[0064] A cemented carbide blade of the present invention, the blade model is WNMG080408. The matrix composition of the cemented carbide insert in this example is shown in Table 1, 6.8wt.% Co metal is used as the binder phase, and substances including WC and titanium-containing cubic phase compounds are used as the hard phase. The cemented carbide insert substrate has a surface structure lacking titanium-containing cubic phase compounds whose average binder phase content is 1.7 times the nominal Co binder phase content, and the thickness of the surface structure is 20 μm. The C / W atomic ratio of the binder phase in the surface gradient structure is 0.95, and the C / W atomic ratio of the core binder phase is 0.83. The average particle size of the titanium-containing cubic phase compound in the alloy is 2.2 μm, the atomic ratio of Ti / (Ti+Ta+Nb) is 0.58, and the atomic ratio of N / Ti is 0.18. The average grain size of the titanium-containing cubic phase is 1.1 μm. The grain distri...

Embodiment 3

[0071] A cemented carbide blade of the present invention, the blade model is WNMG080408. The matrix composition of the cemented carbide insert in this example is shown in Table 1, 8.4wt.% Co metal is used as the binder phase, and substances including WC and titanium-containing cubic phase compounds are used as the hard phase. The cemented carbide insert substrate has a surface structure lacking titanium-containing cubic phase compounds with an average binder phase content of 1.8 times the nominal Co binder phase content, with a thickness of 20 μm. The C / W atomic ratio of the binder phase in the surface gradient structure is 0.94, and the C / W atomic ratio of the core binder phase is 0.81. The average particle size of the titanium-containing cubic phase compound in the alloy is 1.5 μm, the atomic ratio of Ti / (Ti+Ta+Nb) is 0.65, and the atomic ratio of N / Ti is 0.17. The average grain size of the titanium-containing cubic phase is 1.2 μm. The grain distribution of tungsten carbi...

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Abstract

The invention provides a carbide blade and a preparation method thereof, and belongs to the field of mechanical technology. The carbide blade solves the problem that existing cutting blades are not high in universality and have certain limitations. The carbide blade uses Co as a bonding phase, and tungsten carbide and titanium-containing cubic phase compound as hard phases; mass fraction of the bonding phase is 4.5-9.5 wt.%, and mass fraction of the hard phases is 90.5-95.5 wt.%; mass fraction of the titanium-containing cubic phase compound in the carbide blade ranges from 2 wt.% to 8 wt.%; grain distribution of the tungsten carbide is of a double-peak structure; the tungsten carbide comprises coarse grain tungsten carbide and fine grain tungsten carbide; the average grain size of the coarse grain tungsten carbide is 1.5-3.0 microns; and the average grain size of the fine grain tungsten carbide ranges from 0.4 micron to 1.0 micron. The carbide blade is high in hardness, toughness and strength, and is excellent and stable in cutting performance.

Description

technical field [0001] The invention relates to a cemented carbide blade, in particular to a cemented carbide coated blade with a non-uniform WC particle size distribution and a surface layer lacking a cubic phase gradient structure. Background technique [0002] The material for making metal cutting tools must have high high temperature hardness and wear resistance, have the necessary bending strength, impact toughness and chemical inertness, and good processability (cutting, forging and heat treatment, etc.), and not easily deformed. However, the higher the hardness of the material, the lower its toughness, that is to say, it is difficult to have both hardness and toughness of the material at the same time. The prior art uses non-uniform structure or gradient structure to improve the performance of cemented carbide. For example, the patent document US4277283 US patent document and CN1079179A Chinese patent document have disclosed a cemented carbide substrate lacking a cubi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/02C22C29/08B22F3/10B22F3/16C22C1/05
CPCB22F3/1007B22F3/1017B22F3/16B22F2998/10B22F2999/00C22C1/051C22C29/005C22C29/02C22C29/067C22C29/08B22F2009/043B22F3/02B22F3/1021B22F2201/20B22F2201/04B22F2201/11
Inventor 谢文周定良周文豪吴春陈指福
Owner 台州市锐安硬质合金工具有限公司
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