Question

Surfaces on worn parts are often built up again with braze metal. What is the purpose of building up surfaces on worn parts with braze metal?

1) To increase the strength of the worn parts
2) To improve the appearance of the worn parts
3) To reduce the friction between the worn parts
4) To prevent further wear on the worn parts

Answer 1

Building up surfaces on worn parts with braze metal is primarily done to prevent further wear on the parts, restoring their functionality and extending their lifespan.

Step-by-step explanation:

Braze Metal for Rebuilding Worn Parts

The primary purpose of building up surfaces on worn parts with braze metal is to prevent further wear on the parts. While brazing can also contribute to increased strength and improved appearance, its fundamental role is to restore the worn surface so that it can continue to function effectively without quick degradation. In some cases, brazing can also help to reduce friction but it is mainly about restoring the durability of the component.

Braze metal typically consists of a filler material that melts at a lower temperature than the base metals it is joining. When applied to a worn part, the braze metal melts and flows into the worn areas, filling them in. Upon cooling and solidifying, the braze metal binds to the surface, effectively rebuilding it and acting as a protective layer against future wear and tear. This process extends the lifespan of the part and is often more cost-effective than replacing it entirely.