Thank you all for your inputs, unfortunately, they didn't share more info, or parts of the piece. They don't even know if they manufactured the part! Anyway, your help was so useful, and I appreciated all.
My best regards!
Daniel
Hello Redpicker,
I have no idea of the size of the pinion, because the customer only sent a coupon of the failed part. We supply to them heat treatment services, and they asked for help in the analysis of that part.
regards!
Hello all,
No, I could not say if the part is carburized or nitrided, and the analysis was taken at the center of the sample, (it is a coupon 3/4" dia, 1/2" h), so I don't think we are checking at the carburized, or nitrided Surface. The verified hardness was 255 HB.
Attached you will find a...
Hello All!
I have a Steel sample of a fractured pinion, and I wish to know what kind of Steel is, I have reviewed some standards but it doesn't match for any I have checked. Also, we have made a metallographic examination and the microstucture observed, doesn't correspond to the carbón content...
OGMetEngr,
Good evening, our customer, ask for a double stress relieving, it's not about a quench and temper heat treatment, in such case, I agree with you in doble tempering, in order to meet the NACE MR0175 requirement.
thanks for your input
My best regards
Hello All,
I want to know, what is the meaning of a double stress relieving on a low carbon Steel, I think, if the stress level of the parts is high, then a single treatment is enough to complete the stress relieving operation, by holding the parts at an adecuate temperature and time.
Thanks...
