×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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

nitrogen in iron

nitrogen in iron

nitrogen in iron

(OP)
Can you purge molton iron with 99.9 % nitrogen in place of 100 % nitrogen?

RE: nitrogen in iron

Why do you want to use nitrogen? What is in the other 0.1% of the nitrogen gas?

RE: nitrogen in iron

(OP)
purge out the impurties - balance oxygem argon etc

RE: nitrogen in iron

O and N are both soluble in molten Fe, and will therefore be present after "purging".  Ar is not, or at least not to any appreciable extent.  I am not aware of any conventional practice that uses N as a purge with liquid Fe, but I'm certainly not an expert on Fe foundry techniques.

RE: nitrogen in iron

Iron castings do contain dissilved gases which can acting as potential nucleating sites during solidification. Ofcourse addition of suitable inoculants with nitrogen bearing compounds can also deliver the issue. I fail to understand your need to use 100% purity nitrogen while cast iron molten metal is so impure with high levels of S,P and other elements from auto scrap.

Is this a research project or a class assignment.

" All that is necessary for triumph of evil is that good men do nothing".
Edmund Burke

RE: nitrogen in iron

(OP)
we are making a casting - and purge the ladle with pure nitrogen - looking at using a membrane system with liquid backup to save money - what issues will I have if I use a lower purity nitrogen?


 

RE: nitrogen in iron

A commercial grade nitrogen is adequate for your application. There is no need for using high or ultra high purity nitrogen. Only be careful about the moisture in the gas. If you could pass it through a preheater it will be helpful.

" All that is necessary for triumph of evil is that good men do nothing".
Edmund Burke

RE: nitrogen in iron

Agree with previous posts. We did do these tests with industrial grade nitrogen on cast iron.
Be prepared to have tens of ppm's of nitrogen in your steel though, which can be advantegeous in some steels (eg for enamelling or for solid sol. strengthening), but the steel will be extremely sensitive for stretcher strains.

RE: nitrogen in iron

correction... in the previous post "cast iron" should read: continuous casting of steel slab.

RE: nitrogen in iron

Byucougar, I am wondering are you in Utah? If so you might want to contact Pacific States Cast Iron Pipe Co. in Provo, UT someone here could probably would be able to help you with your questions as we use nitrogen in our iron melting process. http://www.pscipco.com/ . I am a maintenance reliability engineer so I am not familiar with the exact process, but I am sure a number of our engineers could help with this issue.

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


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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