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Spot welding tantalum to steel.

Spot welding tantalum to steel.

Spot welding tantalum to steel.

(OP)
I'm currently going to be using a new molecular beam epitaxy system, and the sample mounting procedure involves spot welding tantalum wires to a steel sample mount.  The wires hold up small substrates with a mass of only a few grams.

I've never spot welded, and wondered what considerations need to be taken for welding these two materials together.

Also, I need to buy a spot welder for the lab, any have suggestions on where to look?

RE: Spot welding tantalum to steel.

Here is a little information on welding Ta to CS. I would give both Miller and Sunstone a call.  Depending on your required sizes heat input and pressure will need closely control.  I think equipment from Sunstone should do the job.
Welding Ta can get to be a pain in you know where.

http://www.espimetals.com/tech/tantalum.pdf

http://www.sunstonespotwelders.com/mwh-micro-weld-heads.php

http://www.millerwelds.com/pdf/Resistance.pdf
 

RE: Spot welding tantalum to steel.

unclesyd a star for your humour.  

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