Galling 17-4
Galling 17-4
(OP)
I am trying to fix a design where galling has occurred between two parts made of 17-4SST (H1025). I am looking for strength similar to 17-4, but I would like to prevent the galling? I have looked at using Nitronic-60 with the 17-4 and I am totally open to completely changing the materials? Another possibility I thought of was using 410 and 17-4. The corrosion resistance and strength are the main objectives for the design.





RE: Galling 17-4
RE: Galling 17-4
RE: Galling 17-4
Look at the plain material not the Super
www.cartech.com
RE: Galling 17-4
RE: Galling 17-4
RE: Galling 17-4
When you say galling has occurred between two parts made of 17-4SST (H1025) what exactly the case are they just rubbibg against each other or you are trying to press fit the two parts? Can you give more info?
RE: Galling 17-4
RE: Galling 17-4
application.
Tef gel compound will not work as good if the parts are rubbing each other, but it does work on bolt threads
RE: Galling 17-4
RE: Galling 17-4
I am not familiar with plasma nitriding which might be more appropriate for your application but there are also other nitriding processes such as gas nitriding which however is expensive because it requrires a long furnace cycle but if you have a quantity of parts it might prove to be cost effective. Additionally I think you can combine the gas nitriding process with the age hardening cycle of the 17-4.
Jesus is THE life,
Leonard
RE: Galling 17-4
RE: Galling 17-4
Do not attempt the normal gas (furnace) nitriding process on 17/4.
www.kolene.com
RE: Galling 17-4
http://www.dicronite.com/
RE: Galling 17-4
Why do you advise against the normal gas nitriding for 17-4? Is liquid nitriding far superior or does the gas nitriding have a negative impact on 17-4? We currently use a shallow case gas nitride to prevent galling on 17-4 in the DH1150 condition.
RE: Galling 17-4
I didn’t pursue the development of any processing specifications for gas nitriding 17/4 as the liquid process would satisfy all our requirements and at the time liquid nitriding was considerably cheaper with a much quicker turnaround for us.
As stated in previous posts I installed the first Nitronic 60 vs 17/4 (liquid nitrided) components in the late 60's and early 70's and all are still performing.