[b]Component Over Size Before Heat Treating & Hardening[/b]
[b]Component Over Size Before Heat Treating & Hardening[/b]
(OP)
I need to have parts heat-treated, case hardened and then ground.
Is there a rule of thumb that can be used to determine what the over size of parts should be left at prior to having them heat-treated & case hardened & then ground?
Any response will be greatly appreciated!
Is there a rule of thumb that can be used to determine what the over size of parts should be left at prior to having them heat-treated & case hardened & then ground?
Any response will be greatly appreciated!





RE: [b]Component Over Size Before Heat Treating & Hardening[/b]
RE: [b]Component Over Size Before Heat Treating & Hardening[/b]
Quench temperature can also be a factor if distortion is a concern, thus causing a straightening operation.
I agree with metengr, please tell us what is the configuration of your part among the additional information.
RE: [b]Component Over Size Before Heat Treating & Hardening[/b]
There's no rule of thumb, all of the following have to be seriously considered.
concerning effective case depth.
1) case hardening method
2) workpiece material
concerning possible dimensional change after heat treatment.
1) geometry of part
2) arrange of part in heat treatment furnace
Best regards,
ct
RE: [b]Component Over Size Before Heat Treating & Hardening[/b]
The Heat-Treating & Hardening process will be done outside our facility. The company has asked for drawings to get a better idea since as you all mentioned, the process can differ from part to part.
RE: [b]Component Over Size Before Heat Treating & Hardening[/b]
4140 is typically surface hardened by induction . Sometimes it also has to be initially furnace pretreated to get the chromium carbides in solution but with only a .030" case requirement you may not have to do that.
RE: [b]Component Over Size Before Heat Treating & Hardening[/b]
RE: [b]Component Over Size Before Heat Treating & Hardening[/b]
TTFN
RE: [b]Component Over Size Before Heat Treating & Hardening[/b]