How can I improve my soldering connections?

Question

I am trying to solder an electrode (essentially tungsten wire) to a connector.

The solder flows nicely into the connector cup, but seems to be almost repelled by the tungsten.

This makes for very bad connections.

Any advice? I'm using flux.

Here is my procedure right now:

a) Align wire and connector (rest wire in connector)
b) Apply flux
c) Apply heat
d) Put solder on top of it
e) Solder melts and flows all around the connector, but not the tungsten wire.

Sigh.

As you guessed, I'm using lead-tin solder.

It doesn't work.

What solder does? Please tell me. Best answer will be yours.

Answer 1

Tungsten can be soldered with copper, manganese, silver, and tin...
not lead

here is a link for silver soldering: http://www.laymar-crafts.co.uk/tech6.htm
this will need higher temp than lead... and the suggestion for crimping may be easier if you don't have the equipment

solder is metal "filler" for a connection - if electrical then it allows the electrons to flow from wire to another

hope this helps

Answer 2

Lead-tin solder won't stick to tungsten. If you look at the connection in a light bulb, you will see that it is crimpped.