Corrosion and wear resistance of AISI 316L and 470 stainless steel by plasma nitri...
Austenitic stainless steels affected by sulfides and carbides: surface recovery by...
Full text | |
Author(s): |
Total Authors: 2
|
Affiliation: | [1] USP. Escola Politécnica. Departamento de Engenharia Metalúrgica e de Materiais
[2] Heat Tech Tecnologia em Tratamento Térmico e Engenharia de Superfície Ltda
Total Affiliations: 2
|
Document type: | Journal article |
Source: | Rem: Revista Escola de Minas; v. 63, n. 1, p. 137-141, 2010-03-00. |
Abstract | |
Austenitic stainless steels cannot be conventionally nitrided at temperatures near 550°C due to the intense precipitation of chromium nitrides in the diffusion zone. The precipitation of chromium nitrides increases the hardness but severely impairs corrosion resistance. Plasma nitriding allows introducing nitrogen in the steel at temperatures below 450°C, forming pre-dominantly expanded austenite (gN), with a crystalline structure best represented by a special triclinic lattice, with a very high nitrogen atomic concentration promoting high compressive residual stresses at the surface, increasing substrate hardness from 4 GPa up to 14 GPa on the nitrided case. (AU) | |
FAPESP's process: | 03/10157-2 - Study the correlation between film deposition processes and the tribological properties of the resultant coatings |
Grantee: | Andre Paulo Tschiptschin |
Support Opportunities: | PRONEX Research - Thematic Grants |