Two methods are deployed for the joining of metal. One is brazing. The other one is soldering. The processes are similar and use the same basic procedure. One of the differences between the two techniques is mainly that of temperature. Temperatures greater than 840 ° F are used for brazing. Soldering is done at lower temperatures. You will select certain tools according to whether you are brazing or soldering.
The material being worked will dictate which method is necessary. Brazing is something you'd do with wrought iron wares. You might braze the wire frames of your sunglasses. Soldering is commonly used to work electronic components or to make jewelry. Soldering will not yield the same strength as brazing. Brazing is much stronger of a bond. The whole process can be done in six basic steps:
1. Pre-fit the separate pieces that are to be joined. Inspect the seam for clearance and tight contours. For best results the joint clearance should be 0.15 inches. It's all about filler materials. If the joint is too big it will not fill properly. The same applies to the size of the joint that is too small. It is necessary to ensure all components are free from rust, oil and dirt.
2. Clean all of the materials thoroughly. The two sections must be clean to be joined properly. You can wipe it down using a clean cloth. Grease removing solvents will work best for removing grease and oil.
3. When brazing you will want to use flux. The compounds in the flux prohibit the metal from oxidizing after it is heated way up. Oxidation prevents filler materials from bonding properly.
4. Assemble the parts using clamps or stops in the exact configuration that it is to be permanently joined.
5. Braze the assembly together filling the joint all the way. Heat the separate pieces up first. Then apply the filler material. Capillary action will draw it into the gap to be filled.
6. Perform a final cleaning. Drop the piece in hot water to cool it. Finally brush off any flakes that have formed. Steel wool and mild solvent will clean it further.