According to the characteristics of materials, the application of different processing material W and the preparation method of the case

According to the characteristics of tungsten materials, processing materials , different applications have traditionally divided into three categories of cases and preparation methods : ① pure tungsten and tungsten alloy products in the usual sense , including pure tungsten, doped tungsten, tungsten male , ornaments tungsten and tungsten alloys Lai , whose main products are wire and rods . This is the largest tungsten processing timber species and number of a class of products . ② The second category is a high -density tungsten alloy , mainly of tungsten and tungsten nickel-copper- nickel- iron two series , its application is the use of its high density and high strength properties. ③ The third category is tungsten, copper,  tungsten carbide plate  material, particularly tungsten, copper materials, processing materials are tungsten relatively small amount of a class of article , however , there is considerable development in recent years . In recent decades , tungsten copper material , whether done a lot of work from the application, production and  tungsten balls  , and has made many significant progress : Before the 1960s , most of the products are as high tungsten copper , medium voltage electrical switch electrical contacts using a small amount used for resistance welding electrodes ; 60 to the beginning of the last century, the 1970s , the development of EDM , because tungsten copper material excellent resistance to spark erosion effect , and gradually began to be used as electrical spark electrode material processing machine , to the last century, 80 to 90 years , widening their application and mature , a significant amount of growth in the application ;