We are building a 310S vessel, 22mm thick, that needs solution annealing. Within our organisation there are some questions about the cooling rate this vessel needs.
-- ASME II SA-480 only say's the material needs to be quenched in water or rapidly cooled by other means.
Somebody mentioned the temperature should drop from 1040°C to 427°C within 15 minutes to guarantee material requirements. Because of the design of the vessel and possible difficulty to maintain an equal cooling rate along the surface the choice was made to cool with forced air. To some of us a 600°C temp. drop with forced air in 15min is nearly impossible with forced air. So the main questions are "What is the definition of rapidly?", "Are there other means to reach this cooling rate?" and "Is there somebody who can provide this service within Holland or maybe Germany?". Heating rate is between 150 and 200°C/h starting from 482°C, and holding time 1h at 1040°C.
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
No comments:
Post a Comment