How long is the Golden Bridge welding rod 427 electrode drying?
Not to mention electrode brand, brand J427 welding rod drying, holding time requirements are as follows:1: brand J427, model E4315 belongs to low hydrogen sodium type low carbon structural steel welding rod. The utility model belongs to an alkaline welding rod and adopts a reverse polarity reverse polarity welding application. It is used for welding of pressure vessels such as Q235R and Q245R, and has good impact toughness and crack resistance. The basic electrode is sensitive to moisture, and it must be heated to remove the moisture contained in the coating, so as to reduce the defect of the hydrogen hole in the weld metal.2: the welding rod for welding electrode drying oven, drying temperature at 350 degrees Celsius, ~400 degrees Celsius, drying time between 1 hours, ~2 hours. Then placed in the electrode insulation cylinder at 120 degrees Celsius ~180 degrees Celsius insulation (depending on the electrode, insulation cylinder input voltage, input current, insulation heating wire power size, etc.), with the use of welding rod with. Heating time is not more than 3 times.
Welding rod often causes the deterioration of the process performance due to moisture absorption, resulting in unstable arc, splash, and easy to produce porosity, cracks and other defects. Therefore, the electrode must be strictly dried before use. The drying temperature of ordinary acid welding rod is 150--200 degrees centigrade, the time is 0.5-1 hours; the drying temperature of basic electrode is 350--400 degrees centigrade, the time is 1--2 hours. After drying, it is placed in the insulating box at 100--150 DEG C and used as soon as possible. JB4709 recommended insulation time and temperature (non mandatory standards), but the actual use of the best reference welding rod warranty in the temperature and time requirements!You say J427 belongs to the basic electrode, the temperature is 350 degrees, 1H insulation can be.
420 degrees dry 24 hours, 200 degrees heat preservation 24 hours.
