Friction Stir Welding of Carbon to Stainless Steel
Friction Stir Welding of Carbon to Stainless Steel
(OP)
I am looking to make a weld joint (ASME IX) between carbon steel and SS304L thick walled pipe, approx. 0.25" ID and 0.62" OD. Arc welding between these two is proving difficult because of the mandated filler metal (I know, it should be easy).
The configuration seems amenable to FSW. Does anyone (with actual knowledge or experience) have any suggestions or advice? Are there metallurgical or bonding difficulties inherent with the FSW process for this combination of materials?
Thanks in advance.
The configuration seems amenable to FSW. Does anyone (with actual knowledge or experience) have any suggestions or advice? Are there metallurgical or bonding difficulties inherent with the FSW process for this combination of materials?
Thanks in advance.
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
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RE: Friction Stir Welding of Carbon to Stainless Steel
What filler and welding method are you trying?
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P.E. Metallurgy, Plymouth Tube
RE: Friction Stir Welding of Carbon to Stainless Steel
All results from my googling talk about using a spinning tool between two plates; I am interested in rotating two bars/pipes on a lathe arrangement, pushing them together without a tool. I would be surprised if that hasn't been accomplished already, between like metals at least.
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
RE: Friction Stir Welding of Carbon to Stainless Steel
It can be done but you will need to machine the flash out of the ID afterwards.
There are many commercial providers.
I used to weld stubs of 625 onto 4130 shafts this way.
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P.E. Metallurgy, Plymouth Tube
RE: Friction Stir Welding of Carbon to Stainless Steel
RE: Friction Stir Welding of Carbon to Stainless Steel
That clarified things for me, and I found lots of links.
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
RE: Friction Stir Welding of Carbon to Stainless Steel
Fortunately it will mostly be the steel.
If someone says that they can minimize this then they aren't displacing enough metal to generate a good joint.
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P.E. Metallurgy, Plymouth Tube
RE: Friction Stir Welding of Carbon to Stainless Steel
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
RE: Friction Stir Welding of Carbon to Stainless Steel
Then you are drilling out the weld and shorter piece.
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P.E. Metallurgy, Plymouth Tube
RE: Friction Stir Welding of Carbon to Stainless Steel
Do you mean one solid and one hollow?
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
RE: Friction Stir Welding of Carbon to Stainless Steel
The trimming seen at 0:42 is a nice touch!
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
RE: Friction Stir Welding of Carbon to Stainless Steel
This might help simplify things.
We ended up not using a square-flush joint. We had a slight taper on one piece and a step in the solid one to assist centering.
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P.E. Metallurgy, Plymouth Tube
RE: Friction Stir Welding of Carbon to Stainless Steel
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
RE: Friction Stir Welding of Carbon to Stainless Steel
Ted