I've used scrape, wrap, solder as in second method below, with good-enough success. Not always pretty. Clamping mechanically is often used.
(1) The advice below actually sounds like it may work.
Their method involves:
silver-containing solder
plus Duzall flux (highly corrosive acid based)
to tin the wire out of circuit
allowing it to then be soldered in circuit with 'normal' solder.
Note that Duzall is extremely corrosive and will happily eat anything electronic that comes in contact with it. This method sounds potentially workable but careful cleaning after tinning is essential.
Discussion group recommendation of Dynagrip #430 kit from All-State
They say:
- Dynagrip #430 kit from All-State includes 4' of silver bearing solder and a small dropper bottle of Duzall liquid flux Another company that makes a small kit is J W Harris out of Mason, Ohio They even make kits to solder aluminum. These kits can be purchased at nearly any welding supply store. They also work good for soldering the ends on SS motorcycle cables.
Do not try to silver solder the nichrome wire directly into the circuit--just tin it with the silver solder and then regular solder works FB to attach it to tie points or whatever.
(2) Scrape, wrap solder:
MakerBot method - wrap in solderable wire & solder.