×
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

Cast Copper 1-3% Chrome alloy

Cast Copper 1-3% Chrome alloy

Cast Copper 1-3% Chrome alloy

(OP)
Appararantly this alloy is difficult to cast without introducing defects. I suppose these would be gas or shrinkage or possibly dross defects. Has anybody got any experience in casting this alloy and have any tips as to how a good casting can be produced?

Thank you

Clive Jones

RE: Cast Copper 1-3% Chrome alloy

what type of casting method are you using? Sand casting?
maybe relocate the vent holes and degassing/deoxidizing may help to reduce the porousity or blow holes...

Relocating/redesign the risers or adding hot pads may also work for shrinkage...

What are you trying to cast anyway?

all the best to you..

RE: Cast Copper 1-3% Chrome alloy

(OP)
Thanks Salvitio

The castings are to be sand cast (with a large CO2 core). The product is a pressure ring cast in green sand (currently AB1 Al Bronze). It weights about 180kgs and is water cooled, it is used to push copper contact shoes on to a carbon electrode in a chrome smelter. Therefore it has to be pressure tight, conduct the furnace heat away and be mechanically strong enough to support a reasonable force.

Regards

Clive

RE: Cast Copper 1-3% Chrome alloy

Contact representative of Foseco for for any assistance. They have a range of products to  produce a sound casting. Degassing practice, grain refinement are the important areas.Also purge the liquid metal with Argon or Nitrogen before pouring the metal. Use chills in heavy sections and insulating sleeves for feeders.If you can make the mold too in CO2 sand. Less of moisture related problems for you.

If you have any more concerns please feel free to ask.

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