308806 Lecture Notes - Lecture 6: Shielded Metal Arc Welding, Gas Metal Arc Welding, Submerged Arc Welding
21 Jan 2017
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Document Summary
Solid state welding: forge welding, friction welding, ultrasonic welding. Fusion welding: electric arc welding, resistance welding, oxyfuel gas welding. Welding is a process in which two or more materials, usually metal or alloys are permanently joined together by coalescence. The faying surfaces are the part surfaces i contact or close proximity that are being joined. Welding involves localized coalescence of the two metallic parts at their faying surfaces. Welding, is usually performed on parts made of the same material, however some welding operations can be used to join dissimilar metals. Usually the most economical way to join parts in terms of material usage and fabrication costs. Mechanical fastening usually requires additional hardware components (eg. screws and nuts) and geometric alterations of the parts being assembled (eg holes) Not restricted to a factory environment, it can be accomplished "in the field. Two forms of welding: solid state and fusion welding.
