ally to steel bonding question

[stuee147]

i have a very simple question but i fear the answer may not be as simple.

i would like to use some aluminium in part of my trike im building, but im not sure how i can bond ally to steel it is something that i would like to try im not planing on doing it alot so i dont want to spend lots of money on equipment and gasses to weld it. i was thinking more along the lines of fibreglass ?????
would this work ?

or is there an alternative method ??
i will add iv tried my hand at brazing and iv just never been able to get it to work so id rather not try that lol

stuee

 

[Lanzecki]

Bolts or very expensive glue.

Welding's not gonna work. Brazing's the same.

What's the parts? Load bearing?

 

[KneesUp]

They will corrode each other won't they? (galvanic reaction?)

 

[stuee147]

Bolts or very expensive glue.

Welding's not gonna work. Brazing's the same.

What's the parts? Load bearing?

i want to try and stay away from bolts and its not really load bearing iv not got any set designs but i was thinking of the seat frame and possibly the bottom bracket do they do a special glue ??

They will corrode each other won't they? (galvanic reaction?)

i was hoping someone may know i know if you bond ally with carbon fibre you need to be careful as they can react apparently

 

[mickle]

Swage it, bolt it, clamp it or bond it. Or a combination of the above. We routinely join steel to alu on bike frames - think seat post and seat tube.

 

[Nigeyy]

Assuming you are thinking of some part of the structural frame, and as someone who had a Raleigh Technium mtb with steel/alu bonding, my recommendation would be..... don't. I'm assuming Raleigh had greater resources to do this, and they failed (my frame -admittedly after thousands of miles -came apart, and I wasn't alone in that). They did use an epoxy bonding for the frame joint fwiw. There's a reason why they stopped making them.

 

[Smurfy]

Welding steel to aluminium is extremely expensive and hazardous. It's done using a solid-state process called explosive welding!
The first link is the best one to read.
http://www.triplate.com/?pagina=triplate_solution
http://en.wikipedia.org/wiki/Explosion_welding
http://www.twi-global.com/technical...-welding-and-in-what-applications-is-it-used/
Conventional fusion welding will not work, so don't even think about it!