Tungsten carbide perforated pins itself with pre-holes for ordinary single-hole, as well as porous, there is a square hole, and irregular holes. Its own hole, the cost of drilling can be omitted, the weight will be lighter than a solid material, reducing material costs, but also reduce the cutting time, a solid material with respect to the perforated material, the pores do not need to discharge processed threading the hole, eliminating the need to increase the internal stress increases in the discharge process, thus affecting the performance of tungsten carbide.
Tungsten carbide powder metallurgy products and a hard phase mainly composed of the binder phase. Hard hard phase, mainly a variety of carbides. The main carbides are: tungsten carbide (WC), titanium carbide (TiC), tantalum carbide (TaC) and niobium carbide (NbC). In most cases, the use of cobalt as a binder phase. In tungsten carbide plant, Carbide mixing, pressing and sintering. Tungsten carbide is classified according to the ISO standard, this classification is based on the workpiece material category, the category is as follows:
① tungsten carbide cobalt
The major components of tungsten carbide (WC) and a binder of cobalt (Co).
Its trademark is the "YG" ("hard, cobalt" pinyin word prefix) and the percentage of the average amount of cobalt-containing composition.
For example, YG8, represents the average WCo = 8%, the balance of tungsten carbide, tungsten carbide cobalt.
General tungsten-cobalt alloy is mainly useful in: carbide cutting tools, molds, as well as Mineral products.
② titanium tungsten carbide cobalt
The main ingredient is tungsten carbide, titanium carbide (TiC), and cobalt.
Its brands by "YT" ("hard, titanium" pinyin word prefix) and the average content of titanium carbide composition.
For example, YT15, represents the average TiC = 15%, the remainder being tungsten carbide and cobalt titanium tungsten carbide cobalt content.
③ tungsten titanium, tantalum (Nb) Class Carbide
The main ingredient is tungsten carbide, titanium carbide, tantalum (or niobium carbide), and cobalt. Such carbide or carbide, also known as generic universal carbide.
Its brands by "YW" ("hard", "000" prefix word Pinyin) plus sequence number, for as YW1.