What welding flux for electroslag welding material Q345B

Answer:

H08Mn or H10Mn2345 material with Mn, if it is in welding technology melting mouth electroslag welding machine, welding wire with flux is 2.5, 431, if it is in welding technology with wire electrode electroslag welding, welding wire is 1.6, with Mn and Mo, the flux is generally JF600, if not, you can use 431 instead

H10Mn2Mo (A) is used as the welding wire for electroslag weldingFlux selection HJ431Electroslag welding refers to the use of electric current through the slag generated by the heat of resistance, as the heat source, the filler metal and base metal melting, solidification, forming a solid connection between the metal atoms. At the start of the weld, the welding wire and welding short circuit arc groove, constantly adding a small amount of solid flux melts by arc heat, the formation of liquid slag, slag to reach a certain depth, increasing the feed rate of welding wire, and reduce the voltage, so that the welding wire into the slag pool, arc extinguished, and transferred to the electro slag welding process.It is the shortcomings of the large heat input weld joint, long residence time, near easily overheat under high temperature, the weld metal is cast microstructure of coarse crystalline, low impact toughness, welding after welding generally require the normalizing and tempering heat treatment.Electroslag welding is suitable for the joint of vertical or oblique (inclined in 4:1 range) steel bars in cast-in-place concrete structures, especially for columns and walls of high-rise buildings. The utility model is also suitable for thick plate splicing, vertical welding of a blast furnace in a steel plant, welding of large castings and forgings, and tubular electroslag welder mainly used for the welding of the partition of the steel structure of the building and the welding of flanges. In PWR nuclear power plant, the core of the reactor pressure vessels (RPV, low carbon alloy steel) stainless steel lining of electroslag welding.