While many people use 'welding' and 'fabricatio' interchangeably, others confuse 'welding' and 'brazing ". However, both are quite the case.
Both are separate metal joining sheet metal techniques for the entire sheet metal fabrication process, but each operation is slightly different. In short, welding is a technique that joins metals by melting the base material and causing fusion, whereas brazing joins metals by melting the filler metal and flowing it into the joint.
The American Welding Society defines gas welding as a set of welding processes in which coalescence is produced by heating with one or more gas flames, with or without pressure, and with or without filler metals. Gas welding uses the flame generated by the tip of the torch to melt the base metal and filler metal (if used). The molten metal from the edge of the plate and the filler metal (if used) are mixed in a common molten pool and coalesce to form a continuous mass when cooled. Our company provides China gas cutting machine.
In short, gas welding is a method of heating the surface to be joined to the melting point, fusing the two parts together, and adding a filler rod when needed. Generally, we believe that filler metal is used on all materials with a thickness of 3/16" or greater. All steel to be welded should be cleaned before welding to ensure that it is free of oil, grease, rust, scale, or other possible effects Impurities of the welding quality or the tensile strength of the finished weld. Generally speaking, oxyacetylene (oxygen in specific cases) is recommended for oxyfuel welding.
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Gas Cutting Machine
The difference between brazing and gas welding is that the melting temperature of the filler metal used is lower than the melting temperature of the base material, but higher than or equal to the melting temperature of the filler material. Braze welding differs from brazing is that the joint design of brazing is similar or the same as the joint design used in gas welding. Capillary action is not a factor in bond formation.
Although gas welding usually requires acetylene gas as fuel, it can also be brazed with other fuel gases such as propane, natural gas, propylene and acetylene. This is because during the braze welding, flux is added to perform functions normally associated with pre-cleaning and the deoxygenation characteristics of the acetylene-oxygen flame.
Brazing is usually related to the connection of steel. In general, the filler material used is low smoke bronze-either a bare rod immersed in the flux material, or a bare rod coated with a flux coating on the electrode. In actual operation, the steel to be connected is heated to approximately dark red, and at this time, the low-smoke bronze filler material is used together with the flux and flows with the steel to be connected to form a tight bond.
In general, the strength level of brazed joints is lower than that of gas welded joints.
Low heat input reduces deformation.
In order to form a welded joint, it is not necessary to melt the steel to be welded.
When gas welding is not possible, different materials can be easily connected.
