A514 Gr. A - Fan repair
A514 Gr. A - Fan repair
(OP)
We are doing base metal restoration of the primary Air fan blades and then doing a hard surfacing once we have the blade back to it's original thickness. It is made out of A514 Gr. A material (P 11B )
The only qualified welding procedure my company has for welding P11B to P11B utilizes 11018. The fan company says that they normally use 8018 to fix the blades. Once they use the 8018 and have the blade to flush - they do a layer of E309 and then use a hardsurfacing rod ( such as Hardalloy 155) on top of the 309.
My question is , if we did use the 11018 and THEN did the 309 / hardalloy 155 , would this be a more acceptable repair ? I am not a metallurgist but I was under the assumption that you would want your wire to match the base metals tensile strength ?
I do not know how well E309 welds to 11018.
Thank you in advance
The only qualified welding procedure my company has for welding P11B to P11B utilizes 11018. The fan company says that they normally use 8018 to fix the blades. Once they use the 8018 and have the blade to flush - they do a layer of E309 and then use a hardsurfacing rod ( such as Hardalloy 155) on top of the 309.
My question is , if we did use the 11018 and THEN did the 309 / hardalloy 155 , would this be a more acceptable repair ? I am not a metallurgist but I was under the assumption that you would want your wire to match the base metals tensile strength ?
I do not know how well E309 welds to 11018.
Thank you in advance





RE: A514 Gr. A - Fan repair
Several words of advice for the blade repairs; first make sure that for the higher strength weld metal (110xx) and even for the 80XX weld metal you are using designated low hydrogen consumables (HR4). Second, I would make sure before any butter layer and hardfacing is applied, you wait 48 hours to perform a wet fluorescent MT for the blade material to ensure no delayed cracking. The rest of the advice provided in your post for buttering and hard facing is sound.
RE: A514 Gr. A - Fan repair
Checking our WPS's today and I can't find one for welding P11B with 309 for our buttering layer. Or could I write that up as welding P1 ( the 11018 ) with 309 and then welding P8 (the 309) with hardfacing.
RE: A514 Gr. A - Fan repair
You can also butter the fan blade with Inco A or 82/182, your choice. Most likely, you would need to qualify a WPS.
RE: A514 Gr. A - Fan repair
8018, as-welded, could come reasonably close to matching the base metal. My preference would be a nickel or nickel-moly grade from A5.5, for good ducility and toughness as well as strength.
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"
RE: A514 Gr. A - Fan repair
I tried going by the book on WPS's and found out I don't have one for the 309 to 11018 anyways...