Welding:Hot Wire Tig (GTAW) Weld Overlay of Nickel Alloy (Such as C-686, C-2000, Alloy 59) on C.S.
Welding:Hot Wire Tig (GTAW) Weld Overlay of Nickel Alloy (Such as C-686, C-2000, Alloy 59) on C.S.
(OP)
Hello,
We're trying to develop a weld overlay of nickel alloys onto carbon steel. Client wants to achieve minimum of 1/8" THK of electrode chemistry at the final surface (Spark Test at the surface must have results that fall into the electrode chemistry requirements per ASME Sect. II, Part C (SFA-5.14).
We've tried sub arc and are getting too much iron dilution (even after 4 layers of sub-arc overlay, it's no guarantee the iron will be within range (max 5%wt))
Has any one have experience with hot wire tig for weld overlay of high nickel alloys? If so, please elaborate on what welding equipment and welding procedure details.
If we buy a hot wire tig set up, I would like to build on others experience and purchase a proven set-up.
Thank you for your time
We're trying to develop a weld overlay of nickel alloys onto carbon steel. Client wants to achieve minimum of 1/8" THK of electrode chemistry at the final surface (Spark Test at the surface must have results that fall into the electrode chemistry requirements per ASME Sect. II, Part C (SFA-5.14).
We've tried sub arc and are getting too much iron dilution (even after 4 layers of sub-arc overlay, it's no guarantee the iron will be within range (max 5%wt))
Has any one have experience with hot wire tig for weld overlay of high nickel alloys? If so, please elaborate on what welding equipment and welding procedure details.
If we buy a hot wire tig set up, I would like to build on others experience and purchase a proven set-up.
Thank you for your time
A Fan of EngTips, share the knowledge





RE: Welding:Hot Wire Tig (GTAW) Weld Overlay of Nickel Alloy (Such as C-686, C-2000, Alloy 59) on C.S.
http://www.twi-global.com/technical-knowledge/publ...
Second, once you have digested the above information, you can search for arc machines that have proven hot wire TIG performance for weld overlays.
Third, you will need to review ASME Section IX and qualify a WPS using CRO essential welding variables.
RE: Welding:Hot Wire Tig (GTAW) Weld Overlay of Nickel Alloy (Such as C-686, C-2000, Alloy 59) on C.S.
RE: Welding:Hot Wire Tig (GTAW) Weld Overlay of Nickel Alloy (Such as C-686, C-2000, Alloy 59) on C.S.
RE: Welding:Hot Wire Tig (GTAW) Weld Overlay of Nickel Alloy (Such as C-686, C-2000, Alloy 59) on C.S.
RE: Welding:Hot Wire Tig (GTAW) Weld Overlay of Nickel Alloy (Such as C-686, C-2000, Alloy 59) on C.S.
Samsam1973, would you be willing to share which manufacturer made the hot wire TIG equipment that you're using? How many passes does it take to achieve less than 5% dilution?
Thanks
A Fan of EngTips, share the knowledge
RE: Welding:Hot Wire Tig (GTAW) Weld Overlay of Nickel Alloy (Such as C-686, C-2000, Alloy 59) on C.S.
RE: Welding:Hot Wire Tig (GTAW) Weld Overlay of Nickel Alloy (Such as C-686, C-2000, Alloy 59) on C.S.
Press Equip. Please visit TIP TIG USA http://www.tiptigusa.com/ There are distributors around N.A and Canada.I do have local distributor and i am in Canada.
RE: Welding:Hot Wire Tig (GTAW) Weld Overlay of Nickel Alloy (Such as C-686, C-2000, Alloy 59) on C.S.
Has your company tried overlaying nickel alloys with some of the newer MIG technology (Such as Fronius C.M.T. (Cold Metal Transfer)or Lincoln Electric S.T.T. (Surface Tension Transfer)) ?
I heard our shop tried it a couple years ago using the STT machine and the overlay ended up having micro-cracks at the grain boundaries (very bad news). Lincoln even took a spool of the MIG wire we were using and tried it at their R&D facility and got the same results and communicated that they didn't know what was causing it or how to remedy it. Based on that experience we've sort of given up on the new MIG technology for overlay of Nickel alloys.
I'm wondering if some company has developed it more and has a robust MIG system for nickel alloys. Any one have input on this topic ?
A Fan of EngTips, share the knowledge
RE: Welding:Hot Wire Tig (GTAW) Weld Overlay of Nickel Alloy (Such as C-686, C-2000, Alloy 59) on C.S.
On the other hand TIP TIG can be attached to any fixture quite easily and made automatic and no issues of bonding. It is quite simple to use as maual torch for touchups / repair and is proven for immediate successful procedures.