Tungsten carbide is a sintered metallurgical product of powder form. It is manufactured in vacuum or Hydrogen reduction furnace with refractory Tungsten material (WC) micron powder as the main ingredient and Cobalt (Co), Nickel (Ni) or Molybdenum (Mo) as the binder.  

Tungsten carbide has many excellent characteristics such as high hardness and strength, good wear and corrosion resistance and salient stability under high temperature (even at 500 ºC it is essentially unchanged and at 1000 ºC it is still of high hardness). It can be used to cut cast iron, nonferrous metals, plastics, chemical fiber, stainless steel and high Manganese steel, etc., and make drilling tools, mining tools, wear parts, precision bearings, nozzles and metal molds, etc..


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YW1  Red hardness is good, can be able to withstand the impact load, suitable for processing of heat-resistant steel, stainless steel, also suitable for ordinary steel and cast iron.

YG6   High wear resistance, good impact and vibration. Suitable for medium cutting speed semi-finishing and finishing of cast iron, non-ferrous metals and alloys, non-metallic materials.

YG8   Use intensity is high, with impact resistance, shock resistance is better than YG6, but wear resistance and the cutting speed allowed is lower, suitable for cast iron, non-ferrous metals and alloys, non-metallic materials at low cutting speed.


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Tungsten carbide cutting tools include twist drills, reamers, boring tools, milling inserts, ball mill, blade cutter, taper cutter, smooth plug rod and step drill.

Tungsten carbide can be used as a wide variety of cutting tools. cutting tool Carbide The amount of tungsten carbide tool occupies about one-third of the entire tungsten carbide production.


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The material of manufacturing the tool must have high temperature hardness and wear resistance, the necessary bending strength, impact toughness and chemical inertness, for good process, usually when the hardness is high, wear resistance is also high; high bending strength is with impact toughness. However, the higher the hardness is, the lower the flexural strength and impact toughness are. Tungsten carbide is a widely used tool material. Tungsten carbide indexable inserts are now coated with titanium carbide by chemical vapor deposition of titanium nitride, alumina hard layer or composite hard layer. Developing physical vapor deposition method can be used for carbide tool.


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Tungsten carbide rod is tungsten carbide cutting tools, which applies different coarse grinding parameters, cutting materials and non-metallic materials. Meanwhile, the tungsten carbide rod can also be applied to a conventional automatic, semi-automatic lathe, and so on. The main process is milling → formula according to the intended use →wet milling →mixing →smashing →drying → sifting → crush → drying → mixed sieved and then drying → mix → granulation suppress → forming → low pressure burning → forming → ??cylindrical grinding fine grinding → packaging →detection size →putting in storage.


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standard rods overview
solid rods
1 central coolant duct - broken link
2 straight coolant ducts
2 coolant ducts 30° helix
2 coolant ducts 40° helix
3 coolant ducts 30° helix
3 coolant ducts 40° helix
micro twisted coolant ducts 

Special Rods

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Welding procedure variables control the welding process and the quality of the welds produced. Joint configuration is determined by the design of the weldment, the metallurgical analysis, and by the process and procedure required by the weldment.

Welding variables are selected after the base metal, filler metal, and joint configuration have been selected. The fixed welding variables include the type of filler metal, electrode type and size, the type of current, and the type of shielding gas.

The adjustable variables control the shape of the weld by affecting things such as bead height, bead width, penetration, and weld integrity. The primary adjustable variables for GTAW are welding current, arc length, and travel speed.

Secondary variables also aid in controlling the welding process, but it is more difficult to calculate the extent of effect. The secondary variables include work and travel angle and the distance the electrode extends beyond the end of the cup.

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Dabbing

The dabber variation is used to precisely place weld metal on thin edges. The automatic process replicates the motions of manual welding by feeding a cold filler wire into the weld area and dabbing (or oscillating) it into the welding arc. It can be used in conjunction with pulsed current, and is used to weld a variety of alloys, including titanium, nickel, and tool steels. Common applications include rebuilding seals in jet engines and building up saw blades, milling cutters, drill bits, and mower blades.

Working the puddle

Another method of adding filler rod is instead of dabbing, to rest the filler rod next to the puddle, and melt it down with the TIG torch. This method is typically high deposition and in some cases, can have an advantage over dabbing. One case where it is superior over dabbing is on thin metal. You can move faster by working the puddle therefore it helps with burn through.

Vacuum welding

For industrial applications, superior results can be achieved by eliminating the effects of absorbed gasses at the weld. This can lead to reduced oxidation, reduced workpiece heat carried by convection and stronger materials due to dissolved or reacted gases such as oxygen, nitrogen and hydrogen.

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Joining tungsten to itself or to other metals should be undertaken with caution and an understanding of the limitations involved. Tungsten can be welded to itself. However, the resulting weldment is always recrystallized and hence brittle. Even the use of a W/Re filler rod does not eliminate the brittleness of the metal adjacent to the heat-affected zone. On the other hand, if a leak-tight high temperature joint is required, welding is the only solution.

For joints that do not have to be leak-tight but require good high temperature mechanical strength, the use of either tungsten or tantalum rivets has proven quite satisfactory. Tantalum rivets, while not as strong as tungsten rivets, are much easier to head. Tungsten rivets take more skill to head, but are the most satisfactory.

If tungsten parts which are not to be exposed to very high temperatures are to be joined, brazing is preferred to welding. As long as the braze material has a melting point below the recrystallization temperature of tungsten (under 2200 °F), embrittlement can be avoided. Copper or silver alloys containing small proportions of nickel or iron are suitable for these applications.

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Tungsten can be machined by turning, milling, or drilling. For thick-walled parts, slight preheating of the work to 400 °F is sometimes helpful; otherwise highly chlorinated oil such as trichloroethylene is used. Using a C-2 Type Carbide Tool, a suggested Geometry is:

• Side Angel: 10°
• End Cutting Edge Angle: 3° to 10°
• Back Rake: 0°
• Clearance: 3° to 5°
• Nose Radius: 1/32" to 1/16" Radius
• Cutting Speed: 100 to 200 RPM

The final shaping of tungsten parts is frequently done by grinding. Silicon carbide wheels with a hardness of J to L and a grain size of 100 to 120 have proven useful for most applications. Since tungsten is hard and brittle, surface checking can be a problem unless adequate cooling is used. An oil emulsion type coolant is recommended.