×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Annealing over austenitized 440B

Annealing over austenitized 440B

Annealing over austenitized 440B

(OP)
Would annealing and re-hardening 440B (0.9C) that was austenitized above 1950F not refine the coarse grained structure?
Train of thought is coarseness of the prior austenite grains and out of matrix carbides from the high austenitization and subsequent coarse martensitic structure would translate to fewer points of nucleation and thus less impingement during any recrystallizing cycle.

RE: Annealing over austenitized 440B

1900F would be a more typical aust temperature to quench from.
What anneal temp are you thinking of using?
Which grain size are you talking about?
The standard that gets reported is the 'prior austenite grain size', not to be confused with the finished grain size.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

RE: Annealing over austenitized 440B

(OP)
Yes after annealing, would re-austenitize at ~1900F.
For annealing:
Ideally, would equalize ~1300F (process anneal temp.) + Full anneal ~1560F
Economically, would process anneal >1400F

My main concern is the final grain structure not recovering enough from the anneal + re-austenitize, resulting in subpar final yield and impact properties.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close