Abstract
The wear resistance of a Cr19Mn19Mo2N0.7 stainless steel treated by solution treatment 1160°C for 6h then aging at 900°C for different times is investigated in this paper. Microstructures are analyzed using optical microscopy (OM) and scanning electron microscopy (SEM). A fingerprint nitride (Cr2N) structure is formed during aging, which first nucleates within ferrite laths and along the austenite grain boundaries, and then grows into austenite with increasing aging time. It is shown from the laboratory wear test that the optimum wear resistance is obtained through a solution treatment at 1160°C for 6h and aging at 900°C for 3h, which is mainly attributed to a moderate amount of fingerprint nitrides formed within ferrite laths.
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