Cavitation erosion resistance of active screen-low temperature plasma nitrided AISI 410 martensitic stainless steel
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
Colleges, School and Institutes
- Universidade de Sao Paulo - USP
- Heat Tech Technology for Heat Treatment and Surface Engineering Ltd.
AISI 410 martensitic stainless steel specimens were low temperature plasma nitrided at 400°C in a mixture of 75%N2:25%H2, during 20 h. Active screen technic was used to avoid any edge effect. The nitrided case is composed of expanded martensite (α'n) and ε-Fe3N iron nitride, whilst chromium nitride precipitation was avoided. Surface hardness reached 1275 HV0.01. The transverse microhardness profile shows a gentle hardness gradient with a NHT nitrided case depth of 28 μm. The cavitation erosion mass losses were measured as a function of exposure time. The results showed a decrease of 27 times of the mass loss compared to the non-nitride specimens. Wear rate decreased from 2.56 mg/h for the non-nitrided condition to 0.085 mg/h after nitriding. Such results showed that low temperature plasma nitriding and the formation of expanded martensite are effective to increase cavitation erosion resistance of AISI 410 stainless steel.
|Title of host publication||Materials Science and Technology Conference and Exhibition 2014, MS and T 2014|
|Publication status||Published - 1 Jan 2014|
|Event||Materials Science and Technology Conference and Exhibition 2014, MS and T 2014 - Pittsburgh, United States|
Duration: 12 Oct 2014 → 16 Oct 2014
|Conference||Materials Science and Technology Conference and Exhibition 2014, MS and T 2014|
|Period||12/10/14 → 16/10/14|