Metall. Res. Technol.
Volume 112, Number 4, 2015
|Number of page(s)||8|
|Published online||21 August 2015|
Heat treatment cycle optimization for A707L5 copper-nickel steel
Sezione Materiali per Applicazioni Meccaniche, Dipartimento di
Meccanica, Politecnico di Milano,
via La Masa 34, 20156
2 Istituto IENI-CNR, Unità territoriale di Milano, via R. Cozzi 53, 20125 Milano, Italy
Received: 5 February 2015
Accepted: 8 July 2015
The mechanical properties of the A707L5 steel grade were studied as a function of the applied aging temperature. The results obtained are discussed on the basis of the microstructure analysis and precipitates were identified on the fracture surfaces observed by scanning electron microscopy assisted by a field emission gun (FEG-SEM). This steel grade appears to be particularly sensitive to the aging time-temperature, which significantly affected the precipitation phenomena. The annealing temperature and solution quenching involved in the thermal cycle significantly affect the perlite formation, the grain size and the ε-Cu precipitates that represent the main factors of influence ruling the mechanical properties.
Key words: A707L5 / copper steel / ε-Cu / perlite / solution quenching / aging
© EDP Sciences 2015
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