- Thread starter GrahamGKD
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English Steve
Senior Bumpkin
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Wouldn't think you could actually WELD it because of the different melting temperatures. More likely a solder/bond type joint required.
Also, aluminium and steel in close contact will result in galvanic corrosion so should be avoided where possible.
Also, aluminium and steel in close contact will result in galvanic corrosion so should be avoided where possible.
matt1978
www.lorch.eu
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They can be sucessfully joined, but as you would expect there are a lot of restrictions and rules which must be followed.
Fronius have a specific process for this, called C.M.T, Cold Metal Transfer.
http://www.aws.org/w/a/wj/2005/06/038/index.html
We (Lorch) have done it on exhibtions using a pulse mig for a laugh and also I have seen EWM do the same thing.
As far as I remember.........
The steel must be Zinc coated and must always be on the bottom. It is only poosible with Lap joints but they were looking into fillet joints.
Only thin materials (around 1.0mm-3mm) can be joined.
High % Silicon filler wire must be used.
It is a Braze rather than a weld, as a weld would lead to too much cross dilution between the materials.
Fronius have a specific process for this, called C.M.T, Cold Metal Transfer.
http://www.aws.org/w/a/wj/2005/06/038/index.html
We (Lorch) have done it on exhibtions using a pulse mig for a laugh and also I have seen EWM do the same thing.
As far as I remember.........
The steel must be Zinc coated and must always be on the bottom. It is only poosible with Lap joints but they were looking into fillet joints.
Only thin materials (around 1.0mm-3mm) can be joined.
High % Silicon filler wire must be used.
It is a Braze rather than a weld, as a weld would lead to too much cross dilution between the materials.
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They can be bonded together by a special process. On the ships that had Ally superstructure and steel hull they used to have a bonded plate at the interface. The Al was on top for the superstructure and the steel was on the bottom for the hull.
I think they call it diffusion bonding. Its held under pressure and heat and eventually the two plates stick toghether.
There isnt really any way to weld Ally to steel but there is a trick way
Ally
weld a layer of Ally Bronze
weld a layer of Copper (or CuSi)
weld a layer of Copper Nickel
weld to the Steel
I think they call it diffusion bonding. Its held under pressure and heat and eventually the two plates stick toghether.
There isnt really any way to weld Ally to steel but there is a trick way
Ally
weld a layer of Ally Bronze
weld a layer of Copper (or CuSi)
weld a layer of Copper Nickel
weld to the Steel
