Zirconium in steel
Zirconium in steel
(OP)
Does anyone have information as to the effect of zirconium in steel?
In particular, I'm interested on how it might effect the toughness of a low-alloy steel casting (CrMoV).
From what I can gather, zirconium is used to scavenge nitrogen, and forms 'largish' nitride particles. In tying up the nitrogen, it prevents the formation of aluminium nitride which can be particularly nasty for castings.
However, I'm guessing that an excess amount of zirconium wouldn't be good for the steel. Also, the formation of the large nitride particles - couldn't this also have an adverse effect on the ductility?
Regards
In particular, I'm interested on how it might effect the toughness of a low-alloy steel casting (CrMoV).
From what I can gather, zirconium is used to scavenge nitrogen, and forms 'largish' nitride particles. In tying up the nitrogen, it prevents the formation of aluminium nitride which can be particularly nasty for castings.
However, I'm guessing that an excess amount of zirconium wouldn't be good for the steel. Also, the formation of the large nitride particles - couldn't this also have an adverse effect on the ductility?
Regards





RE: Zirconium in steel
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RE: Zirconium in steel
RE: Zirconium in steel
We make a Zr grade at our shop - boron treated low alloy NiCrMo grade. Like you said it ties up N preventing AlN from GB formation (theoretically) just like Ti or V.
I have no info on low temp toughness, but that can be affected by TiCN formation, which may mean the Zr is used to scavenge N for this purpose in your case.
RE: Zirconium in steel