Which steps are necessary to properly prepare a brazed joint?

The correct answer involves a sequence of steps essential for ensuring a strong and effective brazed joint. To begin, the materials that will be joined must be thoroughly cleaned. This cleaning process is crucial because any contaminants, such as oil, dirt, or oxidation, can interfere with the bond and lead to joint failure.

Next, the application of flux is vital. Flux helps to prevent oxidation during the heating process and promotes the flow of the filler metal, ensuring it adequately fills the joint and adheres to the surfaces being joined. Once the surfaces are cleaned and fluxed, the next step is to heat the joint uniformly. This heating must be done to a specific temperature that is below the melting point of the filler metal but sufficient to allow it to flow into the joint.

After heating, the filler metal is applied to the joint. The heat will cause the filler metal to melt and be drawn into the gap between the pieces being joined by capillary action. This process creates a strong bond that solidifies as it cools, resulting in a reliable and durable joint.

While other options may include some correct steps, they do not follow the proper sequence or terminology for brazing. For example, terms like "apply solder" may not accurately reflect the use of