Powder metallurgy (PM) AISI 430L (UNS S43000) sintered in a nitrogen-hydrogen atmosphere was investigated to obtain an acceptable balance of mechanical properties and corrosion resistance. High-temperature solution annealing (1,150°C, 60 min) and some post-sintered aging heat treatments (100, 200, 300, 375, 675, and 850°C) for different times (90 min, 4, 6, 8, and 48 h) were performed. The effects of nitrogen and temperature/time aging on localized corrosion were analyzed by using an exposure method (ferric chloride test, ASTM G48) and anodic polarization measurements (ASTM G5). Experimental results showed that high-temperature solution annealing provides even better corrosion resistance than the material sintered in vacuum. Also, aging at low temperatures shows a positive effect on mechanical reinforcement without losing significant levels of corrosion resistance.
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1 June 2009
Research Article|
June 01 2009
Improvement in Mechanical Properties and Corrosion Resistance of Powder Metallurgy Type 430L Stainless Steel Sintered in Nitrogen-Hydrogen Atmosphere
C. García;
C. García
*Ingeniería de Materiales, E.T.S.I.I., Universidad de Valladolid, Paseo del Cauce s/n, 47011, Valladolid,
Spain
.
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F. Martín;
F. Martín
‡
*Ingeniería de Materiales, E.T.S.I.I., Universidad de Valladolid, Paseo del Cauce s/n, 47011, Valladolid,
Spain
.‡Corresponding author. E-mail: [email protected].
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P. de Tiedra;
P. de Tiedra
*Ingeniería de Materiales, E.T.S.I.I., Universidad de Valladolid, Paseo del Cauce s/n, 47011, Valladolid,
Spain
.
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Y. Blanco;
Y. Blanco
*Ingeniería de Materiales, E.T.S.I.I., Universidad de Valladolid, Paseo del Cauce s/n, 47011, Valladolid,
Spain
.
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M.L. Aparicio
M.L. Aparicio
*Ingeniería de Materiales, E.T.S.I.I., Universidad de Valladolid, Paseo del Cauce s/n, 47011, Valladolid,
Spain
.
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‡Corresponding author. E-mail: [email protected].
Online ISSN: 1938-159X
Print ISSN: 0010-9312
NACE International
2009
CORROSION (2009) 65 (6): 404–414.
Citation
C. García, F. Martín, P. de Tiedra, Y. Blanco, M.L. Aparicio; Improvement in Mechanical Properties and Corrosion Resistance of Powder Metallurgy Type 430L Stainless Steel Sintered in Nitrogen-Hydrogen Atmosphere. CORROSION 1 June 2009; 65 (6): 404–414. https://doi.org/10.5006/1.3319145
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