Thank a lot for all the responses,
For the re-heat I do follow the step as referenced from ASM handbook vol.4 heat treating for ultra high-strength steels, with the section thickness 25mm, hardening to 870 degC, with oil quenching.
For Cr, some references said it's 0.9-1.2 and 0.8-1.1 I just...
Dear experts,
I've just done re-heat the AISI 4140 with the hardness result still didn't reach the maximum. The investigation found that the chrome is 0,7% which is should be on the range 0,9 to 1,2 % as the standard for AISI 4140. Is there any explanation or relation between the alloying...
Really appreciate for all of the comments, I will through on them for my next experiment.
basically, my problem is about the product of AISI 4140 which not reach the expected hardness and I believe that my previous heattreatment is not good, then I should have the proper one for it. My plan is...
Dear Experts,
I'm interesting with the comment onthread330-311437, it was mention about the limit number for re quenching at 3, is there any specification or standard that said about it, I would be happy to have one.
My other concern is on the process of the re-heating AISI 4140 and I will...
