Metall. Res. Technol.
Volume 117, Number 1, 2020
|Number of page(s)||6|
|Published online||26 February 2020|
Effect of Co on microstructure and mechanical properties of precipitation hardening stainless steel
School of Metallurgy and Engineering, Xi’an University of Architecture and Technology,
Shaanxi, PR China
* email: email@example.com
Accepted: 20 January 2020
The effects of Co element on the microstructure of precipitation hardening stainless steel was investigated by metallographic microscope (OM), transmission electron microscopy (TEM) and X-ray diffractometry (XRD), and the mechanical properties were measured by tensile, hardness and impact tests. The results show that with increasing Co content, the volume fraction of reversion austenite is increased. The precipitation of ε-Cu phase is remarkably decreased, leading to the improvement of ductility, while the strength and hardness are decreased. Co element improves the strength and toughness of stainless steel through fine-grain strengthening, solution strengthening and austenitic toughening.
Key words: precipitation hardening stainless steel / cobalt / reversed austenite / mechanical properties
© EDP Sciences, 2020
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