Carbide cutters

carbide hob cutters

carbide hob cutters, Carbide gear cutters, carbide hobs, fixed hobs,

Gear shaper cutter

carbide gear cutters, carbide slotting cutter, gear cutting

carbide milling cutter

carbide milling cutter

Solid Carbide Drills

carbide drill

Carbide Cutter Insert

Carbide Cutter Insert

spiral bevel gear cutter

bevel gear cutter

Cemented Carbide Rod

Carbide rod

Non-Standard Shank-Type Tool

carbide milling cutters

Characteristics of carbide cutting tools

carbide cutting tool, tungsten carbide parts, carbide tools manufacturers, tungsten carbide products

What are Carbide Cutting Tools?

Carbide cutting tools are usually also called tungsten steel cutting tools.
It is made of refractory high-hardness metal carbide powder on the order of microns, cobalt, molybdenum, nickel, etc. as binders, and fired under high temperature and high pressure. Because of its high hardness, strength, wear resistance and corrosion resistance, cemented carbide is used in the manufacture of cutting tools, knives, drills and wear-resistant parts. Parts processed by cemented carbide cutting tools can obtain the required dimensional accuracy and surface quality, which is the most basic processing method in the machinery manufacturing industry.

Advantages of carbide cutting tools

(1) High hardness and high compressive strength.

Compared with high-speed steel, the hardness is higher, and the hardness of commonly used cemented carbide is 89~93 HRA

(2) Good thermal hardness

It can still maintain high hardness (60HRC) at 900~1000°C.

(3) High cutting speed

The cutting speed of cemented carbide tools can be increased by 4~10 times.

(4) Good wear resistance and high modulus of elasticity.

The service life of cemented carbide cutting tools is 5 to 80 times higher than that of high-speed steel cutting tools. Since cemented carbide has better heat resistance and wear resistance than high-speed steel, tools made of cemented carbide are more suitable for cutting stainless steel.

Cemented carbide tools make molds and measuring tools, and their service life is 20 to 150 times longer than that of alloy tool steel. It can cut hard materials around 50HRC.

(5) Good chemical stability (acid, alkali, high temperature oxidation).

(6) The expansion coefficient is low, and the thermal conductivity and electrical conductivity are similar to iron and its alloys.

tungsten carbide cutting tools
tungsten carbide parts

The use of carbide cutting tools

Carbide tools are generally mainly used in CNC machining centers and cnc engraving machines. It can also be installed on an ordinary milling machine to process some relatively hard heat-treated materials. At present, the tools for processing and cutting materials such as composite materials, industrial plastics, plexiglass materials, and non-ferrous metal materials on the market are all carbide tools.

Carbide cutting tools are widely used for cutting cast iron, non-ferrous metals, plastics, chemical fibers, graphite, glass, stone and ordinary steel, and can also be used for cutting heat-resistant steel, stainless steel, high manganese steel, tool steel and other difficult-to-machine materials. Now the cutting speed of the new cemented carbide tool is hundreds of times that of carbon steel.

Classification of carbide cutting tools

There are many kinds of cemented carbide cutting tools, and there are different classification methods.

1. Classified by processing method

Carbide cutting tools can be divided into turning tools, drills, boring tools, reamers, broaches, milling cutters, threading tools, gear cutting tools, CNC tools, etc. according to the processing method. From single-edged to multi-edged, from simple to complex.

2. Cemented carbide tool materials can be divided into ordinary cemented carbide and ultra-fine grained cemented carbide

1) Ordinary cemented carbide can be divided into tungsten-cobalt (WC+Co), tungsten-titanium-cobalt (WC+TiC+Co), tungsten-titanium-tantalum (niobium)-cobalt and titanium carbide-based (WC+TiC+Ni +Mo)

(1) Tungsten cobalt (WC+Co) (K type)

The higher the cobalt content of the alloy, the better the toughness, which is suitable for rough machining; the low cobalt content is suitable for finishing. Tungsten-cobalt cemented carbide is sintered from WC and Co, and K-type alloys have good thermal conductivity, which is conducive to reducing the cutting temperature. K-type alloys have good grinding processability and can sharpen sharp cutting edges. They are generally suitable for processing materials such as cast iron, non-ferrous metals, and fiber laminates.

Tungsten-cobalt alloy has good toughness, and the tool can be sharpened with a larger rake angle and sharpened. During the cutting process, the chips are easily deformed, the cutting is brisk, and the chips are not easy to stick to the knife. Therefore, in general In some cases, it is more appropriate to process stainless steel with tungsten-cobalt alloy. Tungsten-cobalt alloy blades should be used in the case of rough machining and intermittent cutting with large vibration. Tungsten-cobalt alloy blades are not as hard and brittle as tungsten-cobalt-titanium alloys, and are not easy to sharpen and easy to chip.

(2) Tungsten titanium cobalt (WC+TiC+Co) (P type).

Such alloys have higher hardness and heat resistance, better adhesion and oxidation resistance. When processing steel, the plastic deformation is large, the friction is severe, and the cutting temperature is high. P-type alloys wear slowly and have high tool life.

If the TiC content in the alloy is high, the wear resistance and heat resistance will be improved, but the strength will be reduced. Generally, the grade with low TiC content is selected for rough machining, and the grade with high TiC content is selected for finishing machining. Tungsten-titanium-cobalt cemented carbide is sintered with WC as the matrix, added TiC, and Co as the binder. It is code-named P and is generally suitable for high-speed machining of steel. However, when the amount of TiC increases, the thermal conductivity of the alloy becomes poor, and cracks are prone to occur during welding and sharpening.

Tungsten-cobalt-titanium alloy has better red hardness and is more wear-resistant than tungsten-cobalt alloy under high temperature conditions, but it is more brittle and not resistant to impact and vibration. It is generally used as a tool for stainless steel precision turning.

(3) Tungsten, titanium, tantalum (niobium) cobalt (WC+TiC+TaC(Nb)+Co) (M type)

M alloy is added with appropriate amount of rare refractory metal carbides to improve the performance of the alloy. YW alloy is suitable for semi-finishing machining of chilled cast iron, non-ferrous metals and alloys, and can also be used for semi-finishing and finishing machining of high manganese steel, quenched steel, alloy steel and heat-resistant alloy steel. Adding tantalum (niobium) cemented carbide is another type of cemented carbide produced by adding a small amount of other carbides (such as Ta C or NbC) to the above two hardness alloys, code-named M, which is not only suitable for processing brittle materials, but also Suitable for processing plastic materials. Common grades M10, M20.

(4) Titanium carbide-based class (WC+TiC+Ni+Mo) (P01 class)

P01 alloys are titanium carbide-based, which use TiC as the main component and Ni and Mo as the bonding metal. Suitable for high-speed finishing alloy steel, hardened steel, etc. The main characteristics of TiC-based alloys are very high hardness, good wear resistance, high bonding temperature with steel, and strong crater wear resistance. It has good wear resistance and oxidation ability, and can still be cut at a high temperature of 1000-1300 °C. The alloy has good chemical stability, low affinity with materials, can reduce friction with workpieces, and is not easy to generate built-up edge. Suitable for rough machining and low-speed cutting with impact load, poor resistance to plastic deformation and chipping resistance.

2) Ultra-fine grain cemented carbide

Ultra-fine-grained cemented carbide is mostly used in K-type alloys. Its hardness and wear resistance have been greatly improved, its bending strength and impact toughness have also been improved, and its performance is close to that of high-speed steel; it is suitable for small-sized milling cutters and drills. etc., and can be used to process high-hardness difficult-to-machine materials.

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