Tmoose, you are correct. Investigation report has identified the poor fit of the key as the instigator of shaft damage.
To any others interested:
The weld procedure and welder qualifications with the ER70S-6 A 5.18 wire complied.
Shaft build up was done with balanced longitudinal stringers...
Tmoose; cheers for your reply, the answer to both your first questions is yes.
Missing parent material starts at full depth of the key and in direction of rotation tapers out roughly at between 180 and 250 degrees. Though there is surface damage to the full circumference. And as Metengr noted...
Thank you metengr for your reply.
I appologise for my jargon, and Australian classification of the filler. It is:
Material type: ER70S-6
AWS Classification: A5.18
ASME Specification: SFA-5.18
F Number: F6
A Number: A1
Question:
How much weld metal (0.9 SOLID ES6W503AH using mixed gas 75% Argon 25% C02 ) can be deposited in a build up situation until other alloying elements are required?
Concerned of solidification cracking occurance with too much weld metal and not enough parent metal dilution.
Background...
Thanks DekDee,
I agree completely when it is two materials of the same thickness.
Since posting the thread I have been in a "to and fro" with the design engineer asking for him to do exactly that.
I think they are generally the same thing, except for example, where welding 700gr material the engineer has the option of using non matching strength consumables; therefore the joint will be full penetration but not full strength.( AS1554.4 clause 4.6.1.2)
This is a common case with a lot of...
I have had some sucess with machines of 400A or over by adding a second Earth/ Ground/ Return. Then placing the second Earth/ Ground/ Return clamp so that it is in line with the weld direction; i.e: weld toward the clamp.
thread725-176992
I have been looking through various posts and threads (similar to the one referenced above),on a lot of sites, looking for a technical definition of the difference between a full strength butt weld, and a full penetration butt weld.
To me it appears that where you were educated...
