Nitrogen in alloys

[Noel_M...@brushwellman.com]

1. How are Nitrogen levels controlled in melting of ferrous and non-ferrous
alloys?

2. How are Nitrogen levels reduced if they are too high from intial melt
chemistry to final pour?

3. How are Nitrogen levels increased if they are too low? (Bubbling N2 gas thru
melt, or the use of N2 containing Ferroalloys)?

Thank you in advance.

[J. Kane]

Then there's Plan B - nitrogenate an alloy powder. From there, you can press and sinter, metal
injection mold, roll form or extrude from the powder to a part/sheet/shape. Controlling N
content of powders is relatively easy, as powders are processed well below the melting point of
the alloy.

The Albany lab (formerly Bureau of Mines, now DOE) conducted some evaluations in this area with
promising results (almost 2X increase in yield strength of SS). Search for the author, John
Simmons. (The paper may include a discussion of methods for nitrogenating a melt.)

John Kane
ACTON Materials, Inc.

In article <7pefj6$erv$1...@campus1.mtu.edu>,