Welding Electrodefor TIG welding, which is mixed with about 0.3% -5% of the rare earth elements: cerium, thorium, lanthanum, zirconium, yttrium and other tungsten alloy article produced by the method of powder metallurgy in the tungsten matrix, and then after pressure processing, from 0.25 to 6.4mm in diameter, standard length from 75-600, the most commonly used specifications for the diameter of 1.0,1.6,2.4 and 3.2, the shape of electric extreme in terms of TIG is an important factor when use DCSP, the power of extreme need to grind the sharp shape, and its cutting-edge angle to change with the range of applications, the Carbon Steel Electrodesand welding current, narrow joints need a smaller tip angle when welding very thin materials, the need low current, like the smallest needle electrode to stabilize the arc, and proper grounding electrode to ensure easy arc starting, good arc stability and proper width of the weld bead. When the AC power to weld, do not wear power extreme, using the appropriate welding current, extreme power will form half of the ball, if the increase in welding current, the power of extreme into a bulb-shaped and may melt and contaminate molten gold.