Advantageous where the driveway entrance slopes, busy UAE Mobile Number Database or heavy traffic entrances or where minimal disturbance to the driveway surface is requested. The main design difference from a tracked system is that the cantilever system has a specia It is an arc welding process wherein coalescence is produced by heating the UAE Mobile Number Database job with an electric arc struck between a tungsten electrode and the job. Here are some brief on different type in Welding and Cutting Equipment. The electrodes used in this process are made of either UAE Mobile Number Database Tungsten or Thoriated Tungsten.
Thoriated Tungsten electrodes run cooler than plain UAE Mobile Number Database tungsten electrodes and maintain square arcing ends but it is more UAE Mobile Number Database expensive. A Shielding gas: A Shielding gas (Argon, Helium, Nitrogen, Carbon dioxide or a mixture of gases etc.) is used to avoid atmospheric contamination of the molten weld pool. The inert gas blanket shields UAE Mobile Number Database the entire weld area from the atmospheric attack eliminating the UAE Mobile Number Database need for any flux. General inert gas used is Argon though Helium or a mixture of the two may also be used. A filler metal may be added if required. Commercial grades used for welding are 99.9% pure.
Argon is 0.38% heavier than air and about 10 times UAE Mobile Number Database heavier than Helium. Both gases ionize when present in an electric arc. This means that the gas atoms lose some of their electrons that have a negative charge. These unbalanced gas atoms, properly called positive ions, now have a positive charge and are attracted to the negative UAE Mobile Number Database pole in the arc TIG Welding Polarity: The current source may be either DC or AC depending upon application. DC straight polarity arc is used in metals other than aluminum and magnesium including copper alloys, cast iron, steel and stainless steel. It gives good heat concentration UAE Mobile Number Database and produces welds that are deep and narrow. Welding rates are high and there is less distortion of base metal.