65-45-12 Ductile iron casting to replace forged 1045 part.

[ra45tp]

The part strength is not what I am worried about it is the heat treatment. The part has a ACME thread that currently is nitrocarburized to 60Rc. What I need help with is a HT process to achieve similar surface hardness in the cast part.
Thanks in advance

 

[CoryPad]

It sounds like your current materials selection and processes are ideal. Why are you trying to make things difficult for yourself with this proposed change?

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[MikeHalloran]

Cory is being way too polite.

You need to have a long talk with your lawyer before replacing a forging with a casting.



Mike Halloran
Pembroke Pines, FL, USA

 

[dbooker630]

I'm sure it is a cost reason for changing from a forging to a casting, but I agree with Cory and Mike. Yes, there are surface enhancement processes for cast iron such as laser, but I would not release such a product without fatigue and ultimate load testing of the affected area. You have to be careful with transition zone hardness gradients.