Shaft Hardening
Shaft Hardening
(OP)
Hi There,
I recently joint the group and I came up with following issue which very much related to material selection and applying the right heat treatment. we are using A.I.S.I 1144 steel for our starter armature shaft (.8225/.8240')and carburising the full length of spline to R/C 48/55 (depth of .02/.05) but we are getting 30% more twisting issue in comparison to OEM product after applying the same torque during the application. please advise if can it be the result of hardening depth or the strength of material? Or there is any alternative material/Process for this application?
Thank you
I recently joint the group and I came up with following issue which very much related to material selection and applying the right heat treatment. we are using A.I.S.I 1144 steel for our starter armature shaft (.8225/.8240')and carburising the full length of spline to R/C 48/55 (depth of .02/.05) but we are getting 30% more twisting issue in comparison to OEM product after applying the same torque during the application. please advise if can it be the result of hardening depth or the strength of material? Or there is any alternative material/Process for this application?
Thank you





RE: Shaft Hardening
RE: Shaft Hardening
RE: Shaft Hardening
You can get improved core strength through higher alloying (e.g 5120, 4120, 4320) of the steel and keep the carburizing treatment, or you could use a different alloy (e.g. 1040, 4140, 4340) and quench and temper it for core strength then induction harden the local areas that need high surface hardness.
RE: Shaft Hardening
RE: Shaft Hardening
Thank you
RE: Shaft Hardening
RE: Shaft Hardening
Your advice was realy helpful.