Braze Welding and Filler Metal

Braze welding is a joining process that uses a filler metal that is melted and distributed by capillary attraction to fill the joint between two base metals. The filler metal used in braze welding has a lower melting point than the base metals being joined. This allows the filler metal to melt and flow into the joint without melting the base metals.

Distribution by Capillary Attraction

Capillary attraction is the force that causes a liquid to flow into a narrow space, like the joint between two base metals. When the filler metal is heated, it melts and wets the surfaces of the base metals. The capillary attraction between the filler metal and the base metals causes the molten filler metal to flow into the joint.

Melting and Deposition

The filler metal used in braze welding is melted and deposited at the point where the weld is to be made. The filler metal is often in the form of a wire or rod that is heated with a torch or other heat source. As the filler metal melts, it flows into the joint and solidifies, forming a strong bond between the two base metals.

Not Required

It is important to note that braze welding does not require the base metals to be melted. This makes it a useful process for joining dissimilar metals that have different melting points. It is also useful for repairing parts that cannot be welded using other methods.

In summary, braze welding uses a filler metal that is melted and distributed by capillary attraction to fill the joint between two base metals. The process does not require the base metals to be melted and is useful for joining dissimilar metals and repairing parts that cannot be welded using other methods.