Tungsten wire is often used in incandescent filament, because of its properties, such as high temperature performance, good room temperature performance and wire diameter consistency character. High temperature performance Tungsten has high temperature performance and tungsten filament operating temperature is between 2300 ~ 2800 ℃. Early, tungsten filament lamp life is short, and it is mainly for that the tungsten filament operating temperature exceeds its recrystallization temperature, resulting in filament sagging phenomenon, leading to lamp failure. In order to solve…