monel 400 weld overlay cracks
monel 400 weld overlay cracks
(OP)
Hi,
on SA105 material (thk 100mm) we are trying to perform weld overlay with Monel 400 [wire NiCu-7 1,6mm , flux SA FB 2 55 AC (DIN EN 760) manuf. OERLIKON]. The process is SAW.
the welding electrical parameters are: 300A, 32-34V.
The problem is that we have cracks (like spider net) on the welded surface, which continue inside the base metal... Does anyone have the experience to help me with this problem? I tried also with different preheat temperatures...
Thank you in advance...
on SA105 material (thk 100mm) we are trying to perform weld overlay with Monel 400 [wire NiCu-7 1,6mm , flux SA FB 2 55 AC (DIN EN 760) manuf. OERLIKON]. The process is SAW.
the welding electrical parameters are: 300A, 32-34V.
The problem is that we have cracks (like spider net) on the welded surface, which continue inside the base metal... Does anyone have the experience to help me with this problem? I tried also with different preheat temperatures...
Thank you in advance...





RE: monel 400 weld overlay cracks
RE: monel 400 weld overlay cracks
You also have to careful to keep things very clean. A tiny amount of S will also cause extensive cracking.
= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: monel 400 weld overlay cracks
RE: monel 400 weld overlay cracks
Hot cracking is not related to impurities like S?
S.
http://www.corrosionist.com
RE: monel 400 weld overlay cracks
= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: monel 400 weld overlay cracks
There are a number of compositions in nickel base and iron-nickel-chrome alloys that are subject to hot cracking. Follow Ed's advice.