What is a non-fusion welding process?

A non-fusion welding process refers to techniques where the materials are joined without melting their base metals. Brazing is an excellent example of this method. In brazing, a filler metal is heated above its melting point and flows into the joint between the base materials. However, the base materials themselves do not reach their melting points, which distinguishes brazing from fusion welding processes.

This distinction is important, as it means that the integrity and characteristics of the base materials are preserved, which is beneficial in applications where the properties of the original materials need to be maintained. Brazing allows for joining dissimilar metals and creates a strong joint that can be quite durable when done correctly.

In contrast, other processes like welding involve melting the base metals to form a weld pool, thus altering their structure. Flame cutting, while it can be used as a cutting method and is related to welding processes, also involves melting. Soldering, although it is also a joining method that uses a filler material, typically involves lower temperatures than brazing and is usually associated with electronic components rather than heavy metal joining.

This context highlights why brazing is identified as a non-fusion welding process specifically, as it achieves the objective of joining materials without altering their physical structure significantly