Flux drying insulation to control the use of flux before the first the flux manual provisions baking, this drying specification is based on the test and process control testing
Flux drying insulation control
Welding Wires Manufacturers before use, first by the provisions of the flux manual baking, drying specification is based on test and process control testing, quality assurance of accurate data, which is an enterprise standard, different business requirements specification, followed by According to the steel pressure vessel welding procedures JB4709-2000 << >> recommended flux drying temperature and hold time. The general flux drying, stack height does not exceed 5cm. Welding consumables libraries often in a the drying number of multi-generational less, the stacked thickness to thick-generation thin, this should be strictly managed to ensure the quality of flux drying. Avoid stacking too thick, by extending the drying time to ensure that the flux baking Through.
2. Flux control of on-site management and recycling disposal
Welding parts should be clean, avoid debris mixed with flux, including flux pad with flux according to the provisions of issuance, it is best to stand at about 50 ℃ in a timely manner flux recovery and avoid pollution; repeatedly use flux 8-mesh and 40-mesh sieve were sieved and remove impurities and fine powder, mixed with three times the new flux are. Must be dried at 250-350 ℃ before use and held for two hours, after drying in the 100-150 ℃ incubator save to prepare for the next reuse prohibited in open storage. Complex scene or relative environmental humidity, good management of the operation site in a timely manner, to keep clean flux necessary moisture resistance and mechanical mixture of the test, control moisture absorption rate and mechanical inclusions avoid cluttered flux mixed.
3 the size of the solder particles and distribution requirements
 Welding Flux  of pores of the molten pool of air pollution. The flux is generally divided into two types, a common particle size of 2.5-0.45mm (8-40 mesh), another is a fine-grained 1.43-0.28 mm (10-60 mesh). The fine powder of less than a predetermined particle size is generally not more than 5%, greater than the predetermined particle size the MEALS generally greater than 2%, to do the testing and control of distribution of the degree of solder particles, to determine the use of the welding current. Attachment: flux particle size range of welding current relationship between particle size / mm 2.5-0.45 0.28-1.43 welding current / A <800 600-1200
Flux granularity and heap scattered high degree of control
The solder layer is too thin or too thick will be caused in the weld surface pits, spots and pores, to form a smooth bead shape, the thickness of the solder layer to be strictly controlled within the range of 25-40mm. When agglomerated flux density flux piled high, higher than the melting flux of 20% -50%. The higher the larger the wire diameter of the welding current, high flux thickness corresponding increase; operation of the welding process is not standardized, the fine powder unreasonable disposal of flux, the weld surface appears uneven pits intermittent, non-destructive testing of qualified but The appearance quality affected by the local weakening of the housing thickness.