There are few other materials like carbide, for the global economy and industrial civilization produced such a significant impact.The high hard wear-resistant material is widely used in the manufacture of a variety of different products, such as ball-point pen nib, rod guide ring, wear parts, dental drill bits, armor-piercing core and so on, and it is the most important purpose is manufacturing cutting tools. In fact,the coated cemented carbide cutting tools are the most widely used cutting tools on the market. Such tools greatly increase the productivity level of the metal cutting process, thereby significantly reducing the costs of many everyday products manufacturing.

However, currently on the market all kinds of advanced coating technology and coating material emerge in endlessly, for specific processing tasks to choose the best coated carbideinsert brand isn't always easy. Choose the insert brand is best, from the perspective of the workpiece material, because of the type of processed materials to determine whether you need carbide insert coating plays a key role.

Coated carbide insert for iron group materials (such as iron, cast iron, steel or stainless steel) machining is necessary. Cutting high temperature alloy (especially its machinability alloy material of medium/high level), in most cases, the coating insert is the best choice. Machining titanium alloy can also benefit from the coating, especially in the case of without the use of high pressure coolant.

Uncoated cemented carbide insertis suitable for processing non-ferrous metal materials (such as aluminium). In fact, because aluminum is soft, is easy to produce the devolop tumor, had better use extremely sharp uncoated cutting edge to processing. Other do not need to use the insert coating workpiece materials include brass, bronze, a variety of composite materials and wood. However, using suitable diamond coating can greatly improve the machining efficiency and tool life.

Choose the appropriate coating types are choosing coated carbide insert is the most difficult part. After all, all kinds of processing tasks differ in thousands ways, so you must carefully consider coating technology and coating should be adopted. In addition, for "should be how to choose the appropriate insert coating", is not a simple answer. Learn some basic knowledge of the coating technology and coating material, will help to eliminate the insert selected some uncertainty.

Chemical vapor deposition (CVD) and physical vapor deposition (PVD) are two main types of carbide insert coating process, and each has its own characteristics and advantages. CVD coating thicker (usually 10-20 microns), and have good wear resistance, especially suitable for cutting steel and cast iron, and is widely used in turning processing.

Unfortunately, however, the coating thickness may be harmful to the toughness of the cutting edge. PVD coating thin (usually for 2-3 microns), compared with CVD coating has better toughness, and the surface is usually more smooth. Therefore, this kind of coating is very suitable for high temperature alloy, titanium alloy, and difficult to machining of stainless steel, workpiece materials which tend to cause a cutting edge curve insert wear or crack.

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