×
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

Superheat for pouring Cerrotru (Mp=281*F (eutectic))

Superheat for pouring Cerrotru (Mp=281*F (eutectic))

Superheat for pouring Cerrotru (Mp=281*F (eutectic))

(OP)
I am going to pour a Silicon RTV mold with Cerrotru. This is a Bi-Sn eutectic, with the Mp@281*F. The shape is approximately a hollow cylinder enclosing around 160in^3. Should be 50lbs + gates/risers of metal.

I didn't design the mold, its not optimal. Though it should work. There is one spot where I'm worried about a cold shut. I want to get enough superheat to fully fill the mold, but also dont want to wait all night for shakeout....

Thanks for any tips and tricks... I studied GCI Casting in grad school, so I have some experience with casting, however there is a huge difference btw pouring a melt at 2600F vs 300F, also RTV is a bit different than green sand.
 

Nick
I love materials science!

RE: Superheat for pouring Cerrotru (Mp=281*F (eutectic))

When using the Cerro Alloys we always started with a superheat of 35F above the melting point.

Remember that that these alloys are very poor heat conductors so if you start with enough metal to make a continuous pour I don't see a problem. We cast some very intricate parts of about half your size with no problems.

Depending on the mold composition you might be able to do a little preheat.

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