Introduction to Welding

There are many kind of welding processes available now days. Letter designation is commonly being assigned on each process for identification on drawings, tables, reference, etc. it is also include processes such as adhesive bonding, thermal spraying, and thermal cutting.

To distinguishes between welding processes grouped under “Brazing” and “Soldering” from “Arc Welding”, “Gas Welding”, “Resistance Welding”, “Solid State Welding”, and “Other Processes” is the Capillary attraction.

The international organization such as “American Welding Society or AWS” has made each welding process definition as complete as possible so that it will suffice without reference to another definition. AWS define a process as “a distinctive progressive action or series of actions involved in the course of producing a basic type of result”.

Refer to AWS, welding process is defined as “a materials joining process which produces coalescence of materials by heating them to suitable temperatures with or without the application of pressure or by the application of pressure alone and with or without the use of filler material”.

Mode of energy transfer, base on AWS, has grouped as the primary consideration. Then a secondary factor is the “influence of capillary attraction in effecting distribution of filler metal” in the joint. Capillary attraction distinguishes the welding processes grouped under “Brazing” and “Soldering” from “Arc Welding”, “Gas Welding”, “Resistance Welding”, “Solid State Welding”, and “Other Processes.”

Table below will show the welding processes grouping included the letter designation for each process. The letter designation assigned to the process can be used for identification on drawings, tables, etc.

Above is a brief description about welding processes. Detail of each welding process will be on next post.