Tungsten carbide clamped insert is kind of CNC indexable insert and it can be used continuously by indexing without regrinding.Tungsten carbide clamped insert is also known as CNC insert or indexable insert. Due to it has high cutting efficiency, durability, and high-temperature resistance, it can be widely used in metal turning, milling, cutting groove and thread turning. There are some advantages of tungsten carbide clamped insert:

1. Stable and reliable cutting property, in the process of CNC, except the average of indicators, the reliable indicator Tp should be given (usually specified Tp≥0.9);
2. Chips can be easily controlled, when cutting plastic metal, control the chip is not wound on CNC blade, workpiece and process equipment, control chip does not splash, do not affect the cutting fluid injection, do not affect the targeting and delivery of parts, do not scratch the machined surface, the chips easy to clean;
3. With high precision, small changes in dimensions, and blade holder and blade repeatedly handling accuracy and stability can be maintained;
4. Quick replacement and size presetting, has control and adjust the size or function with automatic tool wear compensation device, in order to reduce downtime for tool change adjustment.

According to the difference in structure and application, tungsten carbide clamped insert can be divided into:
1. Solid type: Grinding material made from a single piece, can be ground into the required type according to different application;
2. Inlayed typed: It can be divided into clip-type and welded-type, and the clip-type can be also specifically divided into indexable and non-indexable type;
3. Internal cooling: Coolant fluid is transmitted to the knife inside the nozzle holes injected into the site of the cutting edge through the spindle or cutter;
4. Special types: Reversible tapping, and other composite tools.

ungsten carbide shovel blade has high hardness, high strength and been widely used in cutting, side shifting soil, subgrade formation, slope trimming.Tungsten carbide shovel blade is composed of hard WC phase and binder Co phase, which can be used in conjunction with road roller for lifting, moving and 360°rotating.

The structure of tungsten carbide shovel blade shows: the front end of the blade structure traction frame is hinged ball, connected with the front hinged front frame, the rear end of the fixed turning circle. It connected via the lift cylinder and swing frame and the front frame motor graders, blade connected with the turning circle in rotation drive the rotating blade. On the back of the shovel blade along the lateral push cylinder lateral sliding. Cutting angle adjustment cylinders can change the shovel blade angle. In conjunction with road roller can finish the work of cutting, side shifting soil, subgrade formation, and slope trimming.

According to different applications, tungsten carbide shovel blade can be divided into bulldozer combined blade, scraper blade, pneumatic blade, electric blade, explosion-proof blade, etc.
Bulldozer combined blade: he right blade is fixed to the body by a pin to push the right side of the middle frame, the right blade body connected with the strut fixed by arch; left blade body connected by a pin and push the middle frame fixed, left blade body connected with the strut fixed by arch.
Scraper blade: Reducing the blade buried area, greatly reducing the cut, earth resistance, saving traction, reducing the shovel time, improve production efficiency by similar earthworks, co-workers, with the shovel of earth from the test, each cubic meters of soil conservation diesel 120g of energy-saving effect of more than 25%.
Pneumatic blade: light in weight, high impact energy, and has many applications, such as water pipes cut, rivet work, stone carving, playing sand, cut, burrs, rust, holes, shovel and other pipeline. It is suitable for removing water and electricity, cement industry, cement trucks, tiles and other residue removals.

Tungsten carbide grinding wheel is a kind of consolidated mold with high hardness, high strength, excellent wear resistance and can be used in metal or nonmetal milling and cutting process.Tungsten carbide grinding wheel is composed of WC and Co binder, and the structure includes grinding compound, binder and pore. In the course of work, the high-speed rotation of tungsten carbide grinding wheel can used for flat, outer, inner surface of in metal or nonmetal coarse milling, semi-finishing, finishing.

The main specifications of the grinding wheel include the abrasives, the granularity, the hardness, the binding agent, the shape and the size, etc. It can be divided into ordinary abrasive (corundum and silicon carbide) grinding wheels and natural abrasives, super-hard abrasive (tungsten carbide, diamond and cubic boron nitride (CBN)) grinding wheel according to the types of abrasives; flat-shaped grinding wheel, bevel wheel, cylindrical grinding wheel, cup wheel, disc-shaped wheel from different shape; and ceramic wheel, resin wheel, rubber wheel and metal wheel depends on the different binder.

The abrasive granularity can be divided into particles (＞40μm) and powders.

Rare earth tungsten electrode is electrode doped with rare earth, including doping one element, two elements and three elements or more. Manufacturing process and the raw material will influence electrode quality.

1. Uniformity of Rare Earth Doping
Solid-liquid sintering is a good choice for uniform doping to produce tungsten electrode. Raw materials are APT (ammonium paratungstate) and rare earth nitrate. The doping process is to make nitrate mixing with APT together, which is benefit for the later decomposition of rare earth and doped into tungsten crystal to reach a result of uniform doping.

2. Reduction of Powder Size
the grain size and distribution during reduction of rare earth powder and tungsten powder will also influence the quality of rare earth tungsten electrode. Because of adding rare earth nitrate into APT, its reduction temperature is higher than the APT itself. The grain size is mainly controlled by the boat loading capacity and temperature difference in the reduction furnace. Good control of the temperature can reduce out better size of rare earth doped tungsten powder.

3. Sintering
Sintering process is the next step after powder is made. Tungsten electrode blank bar is made after sintering. Appropriate temperature is main factor to assure keeping rare earth can sinter together with tungsten bar. Also, in this process, the temperature has been significant.

4. Drawing and Processing
Considering the higher recrystalization temperature of rare earth doped tungsten electrode, its processing requires higher temperature. During this process, rare earth actually is negative for electrode recovery and recrystalization. Larger deformation, but lower processing temperature. The decreasing extent should be much larger than pure tungsten electrodes drawing.

Gathering the above factors influencing the quality of rare earth doped tungsten electrode, temperature has been the common factor and has been the most important one during electrodes production. It can deny that without good control of temperature, the quality of electrode is not assured. Differing rare earth doped electrode from tungsten electrode should be paid attention during manufacturing process.

Chromium zirconium copper electrode has many advantages, such as low contact resistance, superior instantaneous high-temperature performance and excellent wear and explosion resistance, which can be widely used in resistance welding, EDM process and other occasions with high requirement to thermal and electrical conductivity.Chromium zirconium copper electrode, hardness is 78-88HRB, 160-185HV, tensile strength is 540-640MPa, electrical conductivity ＞ 75%IACS, softening temperature is 550℃. Common products grades include GB QCr series and AS C series. The process generally combines cold working with heat treatment: vacuum casting - hot forging - solution technique - cold forging - heat treatment. So chromium zirconium copper electrode achieves high density and perfect mechanical and physical properties.

There are some appications of chromium zirconium copper electrode:
Resistance welding electrode: It mainly used as the electrode in low-carbon steel and coated steel plate spot welding or seam welding, which is also used for electrode grip, shaft and cushioning material, or as a large mold, fixture of projection welding machine, stainless steel and heat-resistant steel mold or inlaid electrode.EDM electrode: Chromium zirconium copper material has high hardness, excellent electrical and thermal conductivity, wear resistance and explosion resistance, so it has perfect performance in verticality, toughness and not bend sheet used as EDM electrode.

Based on theoretical analysis and combined with the problems in concrete production, there are some main factors accounts for the failure of chromium zirconium copper electrode as follow:
1. A third of reason is that the bonding between welding wire and contact tip. It generally due to the large in aperture and out of round caused by the abrasion;
2. Welding temperature or speed controlled improperly, leading to deformation of the contact tip is softened, and the welding wire can not be effectively conducted.

Tungsten electrode doped with two rare earth oxides (binary composite tungsten electrode) usually produces by powder metallurgy method and binary composite tungsten electrodes include W-La₂O₃-Y₂O₃, W-La₂O₃-CeO₂, and W-Y₂O₃-CeO₂. Comparing composite tungsten electrode’s physical property of welding arc with tungsten electrode doped with one rare earth oxides and thorium tungsten electrode can well understand composite electrode performance. After comparison, binary composite rare earth tungsten electrode properties are better than thorium tungsten electrode and tungsten electrode doped with single rare earth oxide.

To add rare earth nitrate solution into WO₃ powders, after two times reduction can obtain alloy powder, and then after mixed, pressed, sintered and plastic working and other processes can obtain composite tungsten electrode, tungsten electrode doped with single rare earth oxide and thorium tungsten electrode.

In the experiment, we use direct current electrode negative (DCEN) argon tungsten arc welding method, with high-frequency arc, and electrode diameter is 2.4mm, electrode diameter is 2.4mm. Besides, electrode tip cone angle is 45 ° and power equipment used ZS500 type silicon rectifier welder, GNP-300 welder control box and 100KVA line regulator.

By comparison, the composite rare earth tungsten electrode has better thermal electron emission properties than tungsten electrode doped with rare earth oxide and thorium tungsten electrode. Besides, it has good arc stability, anti-burning performance, and strong anti-burning performance. During welding, it has long operation time and better working stability.

In the binary composite electrodes, W-La-Ce electrode has lower arc voltage and at low current conditions, it has good arc stability. W-Y-Ce electrode composite electrode has best arcing and anti-burning properties. Besides, it has good arc stability and has large thermal power. W-La-Y has similar arc performance with W-La-Ce electrode and W-Y-Ce electrode, but it has large thermal power is larger, so large current anti-burning properties is lower than W-La-Ce electrode and W-Y-Ce electrode.

Tungsten carbide hammer is also known as crusher hammer, which uniformly distribute in the hammer crusher rotor shaft. And in the high-speed rotation, directly impact on the material until reaching final appropriate particle size. Tungsten carbide hammer has many advantages, such as:
1. Since the center of crusher hammer outward radial direction in the radius of gyration, the line speed of hammer increases and the impact to material increases correspondly, so the crushing effect improved;
2. By improving the hammer can effectively increase the amount of wear, thereby reducing the cost;
3. Reduce the particle size to improve the output;
4. Improve the grinding effect and the grinding efficiency.

Currently, several common hammer materials include forging hammer, high manganese steel hammer, high chrome hammer and tungsten carbide hammer. Forging hammer crusher is suitable for crushing pebbles, coal and limestone. Forging hammer crusher with high-quality steel train wheels (material 65Mn, impact resistance, toughness, wear resistance, and not easily broken) by forging machinery and metal forging blanks repeatedly deform to obtain certain mechanical properties, certain shape and size. After special quenching method to ensure the hammer working area to obtain high hardness, high wear resistance performance; high manganese steel hammer crusher has good toughness, good process and low price, and the main characteristic is that under the effect of large impact or contact stress, the surface layer will quickly harden. The work hardening exponent is 5-7 times than other materials and the wear resistance is greatly improved; by comparison, tungsten carbide hammer has higher hardness, flexural strength, hot hardness, toughness, thermal fatigue and low cost (its wear resistance is 20 times higher than high manganese steel hammer). It can effectively solve the problems that crack, sealing-off, chipping-off and shedding.