×
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!
  • Students Click Here

*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

Jobs

Annealing Query

Annealing Query

Annealing Query

(OP)
Dear friends ,

Kindly advise the difference between Annealing and Solution Annealing Process . How does it affect the hardness of the material ?

Regards

Nadeemglasses

RE: Annealing Query

Do you have any text book on Physical Metallurgy or Heat Treatment Technology. Have you done a Google search .

RE: Annealing Query

The practice will depend on the material.
In general annealing means to soften.
Solution anneal means to use a high enough temperature to fully dissolve any precipitates.
Process anneal means to do it as part of the the production (such as cooling from hot rolling, forging, or extrusion) as opposed to re-heating later.

You need a book or two.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

RE: Annealing Query

(OP)
Dear Arunmrao / EDStainless,

Thanks for the replies.

Yes , I have done a search and the main difference mentioned is the temperature and holding period which is higher in sol. annealed . However I would request you to advise me a book or two which would provide me in-depth details regarding the effects on the material for both processes.

The material is question is Alloy 625 Bars which will be forged into flanges . The hardness of the Raw Bar is between 240 - 260 HB. Once the bar is forged into flanges , the hardness is decreased to 195 - 220 BHN.

We require the HARDNESS to be in the range of 235 BHN after the forging and annealing process.

ponder

RE: Annealing Query

If you need to understand the affect of solution treatment versus annealing on mechanical properties, go to the source and see the web page below. Review the technical bulletin on Inconel 625;

http://www.specialmetals.com/products/inconelalloy...

RE: Annealing Query

In this case you need many details.
Are yo allowed to 'process anneal' these parts? That is if you finish hot work temp is in the anneal range can you claim this as an anneal? Or do you need to re-anneal to meet the spec?
You need to look at hot work temperatures and annealing temps.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

RE: Annealing Query

It is usually good practice to thermally stress relieve/anneal hot forged parts. There are also recommended upper/lower temperature limits for hot forging most materials. During the hot forging process for your 625 Inconel bar stock, it will be heated to a temperature high enough (close to 2150degF) to anneal it.

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!


Resources