Manual gas flame brazing and manual gas welding have the same place but also have different places, the same place mainly has: they have the same heat source;Basically the same equipment and tools;It's all done by hand.But they are different welding methods, one is brazing, and the other is fusion welding.The main differences are as follows:
The temperature control
Gas welding is a welding method that USES gas flame as heat source to make the base material melt (add wire or not fill wire) to achieve the purpose of connection. Gas welding belongs to fusion welding, so in the operation process of gas welding, it is required to make the base material and welding material melt and weld joint.
Manual gas flame brazing, in the operation process, the heating temperature should be strictly controlled to avoid the melting of base metal in the brazing process. As long as the heating temperature exceeds the melting temperature of the filler metal, and the base metal cannot be melted, the brazing connection can be realized.When the gas welder becomes a manual gas flame brazer, pay special attention to the different characteristics of this operation.
The operation of flame brazing is different from that of gas welding.Gas welding is often started by one end of the weld, with the flame core focused heating point to form a molten pool, and then continuous forward heating.Flame brazing first heats the entire joint area by the flame's outer flame to reach the brazing temperature, then continues to heat forward from one end, rapidly flowing into the continuously heated joint clearance.
Range of application
The application range of gas flame brazing is mainly used for brazing parts which can not be brazed by other methods due to limitations of welding shape, size and equipment.It is widely used in the refrigeration industry.Can weld steel, stainless steel, hard alloy, cast iron, copper, silver, aluminum and other machine alloys;The commonly used filler metals are: cu - Zn, Cu - P, Ag - Base, Al - base, zn - Al filler metals.
The application scope of gas welding mainly includes: carbon structural steel, low alloy steel, chromium-Nickel austenitic stainless steel, cast iron and other ferrous metals, aluminum and its alloy, copper and its alloy, lead and its alloy, magnesium alloy, gold, silver and other non-ferrous metals, steel and aluminum and other heterogeneous metals welding.