×
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

12L14 too hard

12L14 too hard

12L14 too hard

(OP)
I have small parts made from 12L14 cold drawn with hardness about 90HRB. What can I do to soften the material which will be deformed to a lower height.

Would heat treatment be influenced by the lead from the material?

Thanks a lot for your help.

RE: 12L14 too hard

First of all, 12L14 does not take well to high levels of deformation due to the directional properties imparted by the high inclusion content due to the added sulfur. Perhaps you could supply more information about the configuration of these parts and the amount of deformation you need to perform.

RE: 12L14 too hard

(OP)
The part is a ring and deformation is simply upsetting the ring to about half of its height. It's the ring test for lubricants.

RE: 12L14 too hard

You can perform a subcritical stress relieving heat treatment to lower the hardness without fear.

RE: 12L14 too hard

stel8,
1)  Are you testing the lubricant and therefore do not care if the ring develops cracks?  1/2 height is severe deformation and cracks would seem a distinct possiblility given swall's comment even though this is a very ductile alloy.

2)  The Lead will not have much effect on heat treatment.

3)  You could try stanweld's suggestion at about 1200-1250F but you might need to perform a full anneal at about 1650F and furnace cool for dead soft.

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