Difference Between Cladding & Overlay

[jafary64]

Hi
I want to know what is Difference Between Cladding & Overlay
Thanks

 

[SWComposites]

in what context??

 

[EdStainless]

Both can be done multiple ways.
Give us more info.

 

[LittleInch]

In general I would say cladding is taking a sheet or pipe of one material and bonding it to another, by pressing, sleeving etc. For pipes it can be mechanical expansion, thermal effects or similar.

Overlay for me is by deposition of one material onto another by welding, spraying or similar.

That's as far as I can go.

 

[EdStainless]

See, to me clad infers a metallurgical bond, such as explosive welding or hot rolled.
If it is loose or just held in place mechanically then it is what? Wallpaper? Lining?
There are just too many options.
And the performance/risks/limitations are very different.

 

[TugboatEng]

With that language I believe you are not a fan of plug welded wallpaper? I've plug welded corrosion resistant cladding to brake drums but wouldn't do it again today knowing what I know today.

 

[SJones]

If we were informed of the articles that the OP has under consideration then we might have a more meaningful discussion.

 

[EdStainless]

All of the methods have a place.
But you have to be smart about it.

 

[kingnero]

Attached the definitions under ISO.

 

[dgeesaman]

See, to me clad infers a metallurgical bond, such as explosive welding or hot rolled.
If it is loose or just held in place mechanically then it is what? Wallpaper? Lining?
There are just too many options.
And the performance/risks/limitations are very different.

Ha! You have more experience than me but my experience is the opposite - in my corner of industry, cladding has always meant welding down sheets of thin high-alloy over plain steel. That cladding is only attached at the edges and any plug welds. Overlay is depositing continuous weld on top of the base layer.

I am aware of explosion cladding, which bonds the materials, but I've not worked with it.

It's safe to say there are many other processes that have 'clad' or 'overlay' in the name.

Murphy's law therefore means I've aligned the planets now so I'll shortly encounter a customer specification that declares 'overlay is strictly forbidden. cladding is acceptable' and the bid will be due the next day.

So I agree, if this isn't a (poorly framed) homework question, it can't be answered intelligently without specifics.

 

[EdStainless]

I did a lot of batten overlay once upon a time.
We welded solid strips of Ni alloy to the CS and then welded thin sheets of Ni alloy to the strips.
What a PIA.