If there is fusion of the parent metal in a joining process, what is this process designated as?

If there is fusion of the parent metal in a joining process, what is this process designated as?

• A. Soldering
• B. Welding
• C. Brazing
• D. Joining

Answer: (B)

The process where there is fusion of the parent metal during a joining operation is designated as welding. Welding involves melting the base materials (the parent metals) so that they fuse together upon cooling, forming a permanent joint. This method typically utilizes high heat, often from an electric arc or a flame, to achieve the required temperature for fusing the materials. In contrast, soldering and brazing are processes that do not involve melting the parent metals; instead, they utilize a filler material that melts at a lower temperature. The filler metal bonds to the base materials without fusing them, thus distinguishing these methods from welding. Joining is a more general term that encompasses all methods of uniting materials, including welding, soldering, and brazing, but it does not specify that fusion of the parent metal occurs.

The process where there is fusion of the parent metal during a joining operation is designated as welding. Welding involves melting the base materials (the parent metals) so that they fuse together upon cooling, forming a permanent joint. This method typically utilizes high heat, often from an electric arc or a flame, to achieve the required temperature for fusing the materials.

In contrast, soldering and brazing are processes that do not involve melting the parent metals; instead, they utilize a filler material that melts at a lower temperature. The filler metal bonds to the base materials without fusing them, thus distinguishing these methods from welding. Joining is a more general term that encompasses all methods of uniting materials, including welding, soldering, and brazing, but it does not specify that fusion of the parent metal occurs.