Gold is a terrible heat conductor compared to sterling silver. The heat will build up without spreading it throughout the piece. The trick is to heat up the gold jewelry piece, but to apply more heat t o the areas where you would like the solder to flow. Begin by heating the jewelry piece up at the furthest point away from the solder or join, it will flow once the sink jewelry piece is at the right temperature. The trick is to get the solder to flow onto the hotter metal beneath it.
If the solder is heated up before the largest piece of metal, it will bead up without flowing. Even if the heat is distributed evenly, but the solder balling up and still not flowing, stop and remove the flame from the piece; the solder is most likely burnt. Even if the sink is a similar size to the solder, still start by heating it up first, this counts for sterling silver and gold. Heat up the sink metal , not the solder. The bigger the piece, also known as the sink, the bigger the flame needs to be.
The tip of the torch needs to be the right size for piece, yet the mixture of the flame plays a big role too. With sterling silver a soft flame is usually the best as it has less oxygen in it, this is ideal because the whole piece needs to be heated and it cuts back on oxidation and firescale. Gold needs a more oxygen-rich, focused flame to heat up the small area. For example; a large sterling silver ring that is being joined needs a big fluffy flame to heat the whole ring up, where a gold version of that ring required a small sharp flame to only heat the join area.
Most of the time the reason for the solder not flowing is not getting the jewelry piece or join area hot enough. Timing is key. The longer the jewelry piece is hot, the trickier things get. Solder will not flow smoothly on an oxidized layer.
The quicker the piece gets to soldering temperature, the better. A handy tip is to heat the piece or soldering area up in a circular motion as I have mentioned in the heat distribution section.
There are a few ways of protecting the cleaned metal layer from oxidation or at least reduce it. Jewelers use this technique to prevent sterling silver jewelry from getting firescale. The flux used is rosin flux which helps the mechanical strength and electrical contact of electrical joints.
There are three types of soldering which use increasingly higher temperatures, which in turn produce progressively stronger joints:. A soldering iron is a hand tool used to heat solder , usually from an electrical supply at high temperatures above the melting point of the metal alloy. This allows for the solder to flow between the workpieces needing to be joined. This soldering tool is made up of an insulated handle and a heated pointed metal iron tip.
Good soldering is influenced by how clean the tip of your soldering iron is. To maintain cleanliness, a user will hold the soldering iron and use a wet sponge to clean the soldering iron tip prior to soldering components or making soldered connections.
In addition to the soldering iron, s older suckers are an important part of the soldering setup. If excessive solder is applied, these small tools are used to remove the solder, leaving only that desired.
Soldering guns are used for applications where more heat is required as irons use lower power. This tool is used for joining stained glass, light sheet metal and heavy electronic soldering work. When you need to solder intermittently, the soldering gun is much more practical as it cools much quicker.
Soldering is widely used in the electronics industry for electrical connections, such as joining copper to printed circuit boards. For everyone else, we have gone to SAC Annie: Like the poster above, you have it backwards.
Lead solder is the superior solder. We are going away from it due to environmental and health concerns. It has nothing to do with budget. I have to write these things down now because I will probably lose my memory soon as a result of the lead in my system. It might even explain how I knew it all when I was 18 and know so little now. Not me. With the proliferation of binary arithmetic, counting to two has become a forgotten art, I agree. I fix PCBs at work alongside the other mostly fixed-by-dust-removal type repairs.
Managers words, not mine. I personally disregard my soldering skill to be OK as I cannot fix BGA issues yet Still and I cause so much heat damage with the current crop of sharp nails they are trying to call soldering tips they are being cheap so I improvise and file a chamfer no deeper than the plating to aid in the angled heat transfer. Six days ago I reflowed the uBGA layer on some NVidia Quatro cards 4x from another Scrap-salvage and done this just for the challenge , I guessed what my luck per card would likely be based on how far gone each of the cards were gone.
Maybe it took a while to be hand-moderated. The burns hurt like hell for a while though :. I found the iron alright. That was over 40 years ago, so it must have been a very deep burn. This is much more satisfying. Awsome vid. At my company everything is hand-soldered, and only one assembler is able to deal with parts smaller than , and one of our flagship new products requires a pin QFP. This method of soldering is perfect every time, does not require you to tune certain heating profiles.
There is no chance of overheating, there is no risk of components not being soldered because they are in cold zones. Because in a vapor phase oven there are no cold zones. Everything is heated evenly by the vapor and only when the board is completely on temperature and the solder is completely molten the vapor can rise beyond the board, trigger a sensor and will automatically cool down. Then after a few minutes you can open the lid and the PCB is ready for testing.
We use a machine similar to this one. This method of soldering is not cheap, but it is the best method for small series in a professional environment. Couldyou elaborate on the liquid? Name, manufacturer, can it be delivered to home addresses, how long it lasts? Thank you. Please be kind and respectful to help make the comments section excellent. Comment Policy. This site uses Akismet to reduce spam. Learn how your comment data is processed.
By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. Learn more. Intermetallic bonding. I heated the ring and not the solder. I heated the ring until it was glowing bright red After letting it cool down again, it seems that my solder pillions have simply welded themselves to the ring I use the nimrod T but cant see it being a heat problem as I had it set to let plenty of air in and that ring was glowing bright red.
This is my third attempt. The first time had the same outcome as this. The second attempt, the pallions started to melt but just into blobs on the surface. I took some of the solder to one side to see if it melts on its own and it does Im flummoxed!
I would try the piercing through the join trick and then try again. Last Jump to page:. Quick Navigation Need Help? Tags for this Thread bangle , flow , solder. Bookmarks Bookmarks Digg del. Contact Us CooksonGold. All times are GMT. The time now is PM. All rights reserved.
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