已经有次观看 yali在2015-03-30发布

Channel：Tungsten 标签： Tungsten  arc  welding 

简介：TIG welding is the use of a tungsten rod as the electrode, the use of argon as a protective gas welding gas welding method, as shown below. Between tungsten electrode and the workpiece through the arc, closed tight gas reservoir from the gun nozzle are ejected in a stream of argon is formed in the arc region of the electrode and the molten metal bath from air, to prevent air intrusion. While using arc heat to melt the base metals and filler wire to form the pool. After solidification of liquid metal bath to form a weld. Because argon is an inert gas, not chemically react with the metal, they are able to fully protect the metal bath is not oxidized. Meanwhile argon gas at high temperature is insoluble in liquid metal, so easy to generate weld porosity. Thus, the protective effect of argon is effective and reliable, you can get a higher quality weld. TIG welding does not melt, so also known as non TIG MIG. Depending on the type of power used, TIG is divided into DC, AC and pulse three.