Ultrafine cemented carbide is a tool material developed in recent years. It is mainly based on ultrafine tungsten carbide powder and adds appropriate binder (such as Co) and grain growth inhibitor to produce high hardnes
Microstructure of the matrix directly influences the performance and the application of metal matrix composites. By using vacuum casting-infiltration method to manufacture casting tungsten carbide particle reinforced com
Tungsten was identified as a new element in 1781, and it was the first isolated as a metal in 1783.There are two important tungsten ores include wolframite and scheelite.Tungsten has the highest melting point of all the
