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Date: 09/20/03 at 11:06 AM
Posted by: Lauro Romeiro
E-mail: lauro@Romeiro.zzn.com

Part : steel 8620 H . Cylinder ( external diameter 85mm and internal diameter 65 mm , width : 50 mm
Process : carburizing and quenching for 60 - 64 HRC , depth
0,6-0,8 mm

How much should you expect the interanl diameter increase during martensite transformation ?
Is there any formula to calculate that ?
What influence on that ? quenching temeprature ? oil temeprature ? etc .

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