type of steel for lathe-worked bushing

[stefer]

good evening to all, I have a couple of issues on a type of material and its technical treatment.
for work I don't manage the materials, but this time I have to do it and I'm a bit distracted.

the problem is this: I need a steel for structural uses that has a rp0,2=600 n/mm2 in theory, so, for example, I take a special steel for remediation specifically 25crmo4 (1.718) with a re=700 n/mm2.

the material must be in the form of laminated round bar and must be machined to automatic lathe to be made as a simple bushing.

question: Should the processing be carried out to already tempered material? If so, the tempering treatment adds thickness to the bushing diameters (I have tolerances that I must respect).

Last thing with that kind of rp0.2... for a finished product that as I said is a mouthpiece that then only galvanized and on which no other processing is made... Do you have a carbon steel to recommend?

thank you and excuse the novice questions.

Say hi.
I'm sorry.

 

[meccanicamg]

the tempered bushing ... I would take a bar in 42crmo4 the lathe sgrosserei and send it to tempeare. I'm gonna have to get her to rectify later.
All I'm cinema costs me a bang. if the dimensions allow it you can make a round reclaimed at heart and not tempered. take and drill in electroerosion.

another alternative and make and finish the mouthpiece and send it to nitrurates. if you leave from a reclaim also arrives beyond because the breaking load usually is around 900-1000mpa.

However if you need only that re=700mpa you should take a pre-paid laminate, return and finish the bushing. then I send it to galvanize.

no tempering inventions.

Carbon steels you can think of a c100 reclaimed...but I don't know how easy you find it because it is more dedicated to sheet metal.

 

[stefer]

Hello, thank you for the answer!
So... in this period it is also difficult to find the right raw materials... So I'd be inclined for some 39nicrmo3, laminate reclaimed then drawn +qt +c ... I asked specifics on the tolerances of the thread and if they fall into those of the final piece, I just have to cut it to size for the length.
If they don't come back, I'm gonna have to reevaluate it. But I think the best thing is that of, as you said, finish the mouth and then send it to nitride.
Are there any increases in thickness due to thermochemical treatment that I have to take into account when drawing the bushing?

Thank you!
I'm sorry.

 

[meccanicamg]

Hello, thank you for the answer!
So... in this period it is also difficult to find the right raw materials... So I'd be inclined for some 39nicrmo3, laminate reclaimed then drawn +qt +c ... I asked specifics on the tolerances of the thread and if they fall into those of the final piece, I just have to cut it to size for the length.
If they don't come back, I'm gonna have to reevaluate it. But I think the best thing is that of, as you said, finish the mouth and then send it to nitride.
Are there any increases in thickness due to thermochemical treatment that I have to take into account when drawing the bushing?

Thank you!
I'm sorry.

if the nitriding is carried out following the correct parameters does not deform the material or increase the size. feel first the treatmentist who will give you the right treatment for what you need.

 

[stefer]

Thank you for your help.
steak