Bronze Impellers Repair

[LucasVrV]

I would like to know if is possible to repair a Impellers made from bronze, if can weld and about the rebalance, how should be done it ?
Thank you

 

[metengr]

What type of bronze? Extent of weld repair?

 

[metengr]

Before you go too far, I would strongly suggest you review the attached

https://rules.dnvgl.com/docs/pdf/DNV/cn/1992-10/99-V790_1992.pdf

 

[LucasVrV]

Metengr -
Weld Repair
Material of the impeller: Nickel Aluminum Bronze (ASTM M148 C95800)

Pic

http://files.engineering.com/getfil...0f10-4d7c-83a8-7a84d081ef34&file=DSC00483.JPG

Thank you!

 

[metengr]

Ok, I think the attached link should provide the necessary information to guide you along;

https://www.copper.org/applications.../pub-222-nickel-al-bronze-guide-engineers.pdf

 

[LucasVrV]

Thank you metengr!

 

[EdStainless]

Why are you repairing these?
Unless there were gross defects in the originals the repaired ones will have poorer performance (corrosion and fatigue).
Maybe you need to look at the service and the original design.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

 

[LucasVrV]

EdStainless

It is just a temporary repair, until the new ones arrive (maybe 3 months until arrive)
The defects are some cracks in it like the photo in att.

http://files.engineering.com/getfil...e702-4123-b0cb-6eb41da38118&file=DSC00483.JPG

 

[metengr]

The temp NiAl bronze weld repairs will be just fine. We have performed weld repairs on NiAl bronze impellers because of similar erosion damage at our Power Station and they have lasted for years.