A punched hole at (near) the plate edge of which the plasma arc cut is started.
Welding Tech
A low current arc between the electrode and the constricting nozzle of the plasma arc torch to ionize the gas and facilitate the start of the welding / cutting arc.
The product of the blast furnace cast into blocks convenient for handling or storage; iron alloy as recovered from the ore. A brittle material of high carbon content (5%).
A method of starting a plasma arc cut in which the arc plunges into and through the workpiece before cutting begins.
The changes in the crystalline structure of metals caused by temperature and time.