Modern architecture is basically a pressure vessel welding structure. Welding is the main pressure vessel manufacturing process in hand One segment. The electrodes are the most commonly used welding material. Depending on the purpose and performance, electrodes can be divided into nine categories . â‘ structural steel Welding Rods(ordinary low-alloy steel are also included in this category): this type of deposited metal electrode, at room temperature from Natural environment has a certain mechanical properties. â‘¡ molybdenum and chromium-molybdenum heat-resistant steel electrodes: These electrodes deposited metal, with varying degrees of heat to work . â‘¢ Stainless Steel Electrodes: These electrodes deposited metal, at room temperature, high or low temperatures with different degrees of Atmospheric corrosion resistance of corrosion media and certain mechanical properties. â‘£ welding electrodes: These electrodes designed for welding of metal surfaces, the deposited metal at room temperature and high temperature A certain degree of resistance to different types of wear or corrosion properties. â‘¤ low electrode: This type of electrodes deposited metal, the temperature in different media conditions, has a certain low Temperature and the ability to work. â‘¥ cast iron welding rod: a special electrodes such as welding or soldering iron. â‘¦ nickel and nickel alloy electrodes: These electrodes for nickel and aluminum welding, welding, or welding. Some electrodes Can be used for cast iron welding and welding of dissimilar metals. â‘§ copper and copper alloy rod: This type of electrode used for welding copper and copper alloy, welding, or welding. Some electrodes Can be used for cast iron welding and dissimilar metal welding. â‘¨ aluminum and aluminum alloy electrodes: These electrodes used for welding aluminum and aluminum alloy, welding, or Welding Electrodes.
â‘ electrodes before use, generally dry, acidic electrode as condensation drying in 75 ~ 1500C 1 ~ 2h; basic low hydrogen type structural steel Welding Rods should be dried at 350 ~ 4000C 1 ~ 2h. Drying of the electrodes should be placed 100 ~ 1500C incubator (tube), the used with the check, used to keep the dry.
â‘¡ low hydrogen type electrode is generally more than 4 hours at room temperature, should be re-dried, not more than three times the number of repetitions.
â‘¢ electrode drying should be recorded, the record should be grade, batch number, temperature and time and so on.
â‘£ In the electrode drying period, the shall be specifically responsible for the technical staff responsible for inspection and verification operation, not less than once each batch of electrodes, and the signature in the operating record.
â‘¤ dry electrode, the electrode into the stack or bundles should not be stacked, should be laying into a layered, stacked on each electrode can not be too thick (usually 1 to 3 layers), to avoid uneven heating electrode drying and moisture is not easy excluded.
â‘¥ Welding Electrode in recipients, the recipients must be asked to fill out a single product, the complete project, including order number, product drawing number, part number by welders and welding recipients grades, specifications, quantity and time recipients, and recovery of the remaining time as the work electrode verification basis.
â‘¦ electrode drying, remove and prevent the electrode into the electrode should be due to cold and heat arising from drugs skin cracking, peeling phenomenon.
â‘§ open operation overnight, the electrode must be kept properly, does not allow open storage should be stored at low temperature oven, or even the next day to re-dried before use.
â‘¨ prevent the wrong grade welding, welding materials requisitioned should be established in addition to the system, the need to establish the first collection electrode system to prevent loss of production remaining electrode site.