Inserting Stainless steel blades into a Nodular Iron turbine diaphragm

[Osvaldo]

TL;DR

Blades are part of a steam turbine diaphrams, and should be inserted into the casting part.

Would need some advise on how to prevent the blades from melting when pouring the nodular iron into the piece mold. If somebody has experience on the matter or can recommend literature that could help in developing a successful .

 

[chemisttree]

I found this. They recommend against it.

“To accommodate installation of the rotor, the diaphragm is split into equal halves creating a horizontal joint. The outer ring supports the diaphragm in the case while the inner ring hangs free. The solid structure can be achieved by one of the following manufacturing methods:
 Welding
 Casting
 Pinning
 Machining from a solid plate
Welding is the most common, reliable, and cost effective method of diaphragm fabrication. Casting a diaphragm, consisting of cast iron rings and stainless steel vanes, is inaccurate and does not have sufficient strength. “

https://turbolab.tamu.edu/wp-content/uploads/2018/08/METS2Tutorial2.pdf

page 5.