bob1111
Aerospace
- Oct 14, 2008
- 68
We are working on a shift fork for a transmission. The OE part is an unknown steel alloy. Have not got everything tested yet but seems to be around RC35-38 and the shift paws that have all the sliding friction seem to have some type of hard silver coat on them that is around RC65. I grinded on the part and does not seem to have much if any case harden and probably to keep the fatigue life up.
I am trying to select a material for this. I have looked at 4340 and A-2. I would prefer not do to any super special processing with these other than a temper. I have looked at nitrocarburizing to add a thin, super hard case on the part. I am not really familiar with the process though.
Very open to ideas to get high stiffness, high fatigue life, good wear. I will be adding a lubricity ceramic on the completed part as well. my target hardness for these is RC62-68 on the case.
I am trying to select a material for this. I have looked at 4340 and A-2. I would prefer not do to any super special processing with these other than a temper. I have looked at nitrocarburizing to add a thin, super hard case on the part. I am not really familiar with the process though.
Very open to ideas to get high stiffness, high fatigue life, good wear. I will be adding a lubricity ceramic on the completed part as well. my target hardness for these is RC62-68 on the case.