Carbide cutting tools wear mainly include abrasive wear, adhesive wear, abrasion and chemical diffusion wear those four categories, reasons of carbide cutting tools wear are as follows:

1.Abrasive wear. When cutting, the chips, the workpiece material is contained in some of carbides, oxides and hard particles BUEdebris that can scratch the surface of carbide cutting tools, this is the abrasive wear (also called hard particle abrasion).

2. Adhesive wear. Present on the surface of the particles of carbide cutting tools and chip or relative movement of the workpiece is taken away, the bonding tool wear occurs.

3. Diffusion wear. In cutting temperature, carbide cutting tools and workpiece surface, formed by a fresh surface chip always contact the tool and the workpiece in the chemical elements, the chip chemical elements are mutual diffusion occurs, the performance of the carbide cutting tool materials decline, accelerated tool wear.

4. Chemical wear. When the temperature conditions are met carbide tools to work with some of the surrounding medium chemical reaction occurs in the processing environment, if there is some kind of corrosive media, the tool will cause corrosion, the formation of the tool wear.

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Advantages of coated carbide cutting tools mainly in four areas:

1. Good heat resistance. Since the coating material has good heat resistance, coating hard tool with increasing temperature, the hardness decline no ordinary carbide tools large.

2. High hardness, good wear resistance. Compared to ordinary carbide inserts, carbide coating higher cutting speeds can be used for high-speed cutting and one thousand cuts. Even under the same cutting tool can also be greatly improved durability.

3. Good anti-adhesion properties, low coefficient of friction, higher tool life. Since the affinity and capacity TiN, TiAlN, Tie, AI2O3 and other coating materials and the workpiece difference, the higher the cutting temperature can effectively inhibit the occurrence of adhesive wear.

4. Good chemical stability. When cutting steels in high-speed, antioxidant capacity,chemical stability and anti-chemical wear property of AI2O3 coated carbide cutting tools get stronger.

In summary, advantages of coated carbide cutting tools are obvious.
 

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Boundary notch of the cemented carbide cutting tool can be expressed by boundary notch height and boundary notch width. The forming processes of boundary notch can be divided into three steps: micro-tipping appears firstly; then,mesh fractures expand; finally, boundary notch results.

Main factors that influence boundary notch of cemented carbide cutter are pieces material,cutter material and cutter geometry parameters.

Deburring machining process and adjusting cutting tool geometry parameters to reduecce angle and width of negative chamfer, to increase cutter corner that ensures thae quality of workpiece and cutting performances of cutting tool.


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Y1715:its density is 11.3 with bending strength up to 1760 and the relevant hardness is 92.0. In terms of performance it has high red hardness and wear resistance. It is suitable for medium finishing to finishing of alloy steel with high strength.

Y1712:its density is 11.8 with bending strength up to 1750 and the relevant hardness is 92.0. In terms of performance it has high wear resistance and excellent impact toughness. It is suitable for machining of steel with high strength, managanese steel ,silicon steel sheets and stainless steel.

Y1798:its density is 12.3 with bending strength up to 1910 and the relevant hardness is 91.5. In terms of performance it has high toughness and high resistance to thermal shock and plastic deformation.Milling of alloy steel ,tool alloy steel,manganese steel and stainless steel.

Y1790:its density is 12.4 with bending strength up to 1800 and the relevant hardness is 91. In terms of performance it has better ,toughness ,wear resistance ,high impact resistance ,thermal cracking resistance,and plastic deformation resistance for rough turning,milling and planing of steel ,esp. forgings and castings scales.


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YG6:its density is 14.9 with bending strength up to 2050 and the relevant hardness is 90.5. In terms of performance it is fine grain WC alloy ,which wear resistance is higher than YG6,strength in use.close to YG6.Machining of chilled alloy cast irons and refractory alloy steel or finishing of ordinary cast irons.

YG8:its density is 14.7 with bending strength up to 2520 and the relevant hardness is 90.0. In terms of performance it shows high strength in use ,impact and shock resistance higher than YG6,but wear resistance and cutting speed comparatively lower. Roughing of cast irons,non ferrous metals and their alloys as well as nonmetallic materiels at low cutting speed.

YG6X:its density is 14.9 with bending strength up to 1890 and the relevant hardness is 91.5. In terms of performance it is fine grain WC alloy ,wear resistance higher than YG6,strength in use.close to YG6.Machining of chilled alloy cast irons and refractory alloy steel or finishing of ordinary cast irons.
 

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YW1:its density is 13 with bending strength up to 1710 and the relevant hardness is 92.5. In terms of performance it has high red hardness,resistant to impact load. A good grade for general purposes. Machining of ordinary steel, cast irons and hard to machining materials such as refractory steel manageress steel,and stainless steel.

YW2A:its density is 12.9 with bending strength up to 1910 and the relevant hardness is 91.5. In terms of performance it has high red hardness and high strength in use,resisting high impact load.A good grade for general purposes.Machining and medium machining or cast irons and problem materials such as refractory steel,manganese steel,steel,stainless steel and advened alloy steel.

YW2:its density is 12.9 with bending strength up to 1880 and the relevant hardness is 91. In terms of performance its wear resistance second to YW1 yet strength comparatively higher and resistant to high impact load.Roughing and mediummachining of ordinary steel cast irons aswell as refractory steel,manganese steel.stainless steel and advanced alloy steel.

 
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YT30:its density is 9.5 with bending strength up to 1140 and the relevant hardness is 92.5. In terms of performance its wear resistance and cutting speed higher than YT15 but strength and impact toughness comparatively lower finishing of carbon steel and alloy steel,for instance fine turning,boring or fine reaming or their small chip sections.

YT15:its density is11.3 with bending strength up to 1650 and the relevant hardness is 92. In terms of performance its wear resistance higher than YT5,but impact toughness lower than YT5,semi-finishing of the medium chip sections of steel .cast steel and alloy steel or finishing or their small chip sections

YT5:its density is12.9 with bending strength up to 2200and the relevant hardness is 90.5. In terms of performance it has best strength and high impact &shock resistance among W-Co-Tialloys but wear resistance comparatively lower.Rough turning rough planing and half precision planing of carbon steel and alloy steel(including forged steel parts,stamped parts and cast iron surfaces).


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The precaution for use of carbide tools is listed as follow,

1. Carbide grades. This sounds strange as it was also an advantage, but harder carbides have problems as well. Due to the high hardness of inserts they can be broken or chipped easily if they come into contact with hard materials. You must watch out for loose knots or foreign materials at all times.

2. Proper setup. Inserts must be mounted properly between changes. This includes making sure pitch and dust is removed from all mounting surfaces before putting in a new insert. Seating inserts properly in the head is important to getting the proper cut. Also, proper tightening of gib screws is important to prevent insert breakage or screw stripping.

3. Damage. If an insert head is crashed or an insert is broken, the head may need to be sent back to the manufacturer for repairs. In the worst case scenario, you may have to replace the head due to the damage.

 
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