Effects of Processing Temperatures on the Characteristics of the Surface Hardened Layer Produced on Duplex Stainless Steel by Low Temperature Plasma Nitrocarburizing

PRICM ◽  
2013 ◽  
pp. 2025-2033
Author(s):  
Insup Lee
Keyword(s):  
Stainless Steel ◽  
Low Temperature ◽  
Duplex Stainless Steel ◽  
Hardened Layer ◽  
Low Temperature Plasma ◽  
Temperature Plasma ◽  
Plasma Nitrocarburizing ◽  
Surface Hardened Layer

Crevice and pitting corrosion of low temperature plasma nitrided UNS S32750 super duplex stainless steel

2021 ◽  
Vol 413 ◽  
pp. 127095
Author(s):  
Oriana Palma Calabokis ◽  
Yamid Núñez de la Rosa ◽  
Carlos M. Lepienski ◽  
Rodrigo Perito Cardoso ◽  
Paulo César Borges
Keyword(s):  
Stainless Steel ◽  
Low Temperature ◽  
Duplex Stainless Steel ◽  
Pitting Corrosion ◽  
Super Duplex Stainless Steel ◽  
Low Temperature Plasma ◽  
Temperature Plasma

scholarly journals Effect of Low-Temperature Plasma Nitriding on Corrosion and Surface Properties of Duplex Stainless Steel UNS S32205

2020 ◽  
Vol 29 (4) ◽  
pp. 2612-2622
Author(s):  
Yamid E. Núñez de la Rosa ◽  
Oriana Palma Calabokis ◽  
Paulo César Borges ◽  
Vladimir Ballesteros Ballesteros
Keyword(s):  
Stainless Steel ◽  
Low Temperature ◽  
Duplex Stainless Steel ◽  
Surface Properties ◽  
Plasma Nitriding ◽  
Low Temperature Plasma ◽  
Temperature Plasma

scholarly journals Low temperature plasma carburizing of AISI 316L austenitic stainless steel and AISI F51 duplex stainless steel

2013 ◽  
Vol 66 (2) ◽  
pp. 209-214 ◽  
Author(s):  
Carlos Eduardo Pinedo ◽  
André Paulo Tschiptschin
Keyword(s):  
Stainless Steel ◽  
Low Temperature ◽  
Duplex Stainless Steel ◽  
Aisi 316L ◽  
Low Temperature Plasma ◽  
Temperature Plasma ◽  
Carbon Carrier ◽  
316L Austenitic Stainless Steel ◽  
Expanded Austenite ◽  
Plasma Carburizing

In this work an austenitic AISI 316L and a duplex AISI F51 (EN 1.4462) stainless steel were DC-Plasma carburized at 480ºC, using CH4 as carbon carrier gas. For the austenitic AISI 316L stainless steel, low temperature plasma carburizing induced a strong carbon supersaturation in the austenitic lattice and the formation of carbon expanded austenite (γC) without any precipitation of carbides. The hardness of the carburized AISI 316L steel reached a maximum of 1000 HV due to ∼13 at% carbon supersaturation and expansion of the FCC lattice. For the duplex stainless steel AISI F51, the austenitic grains transformed to carbon expanded austenite (γC), the ferritic grains transformed to carbon expanded ferrite (αC) and M23C6 type carbides precipitated in the nitrided case. Hardness of the carburized case of the F51 duplex steel reached 1600 HV due to the combined effects of austenite and ferrite lattice expansion with a fine and dispersed precipitation of M23C6 carbides.

scholarly journals Development of a methodology for measuring the evolution of duplex stainless-steel low-temperature plasma nitrided phases expansion using confocal laser scanning microscopy

2021 ◽  
Vol 40 (1) ◽  
Author(s):  
Carlos Eduardo Alves Feitosa ◽  
Rodrigo Perito Cardoso ◽  
Silvio Francisco Brunatto
Keyword(s):  
Stainless Steel ◽  
Low Temperature ◽  
Duplex Stainless Steel ◽  
Laser Scanning ◽  
Laser Scanning Microscopy ◽  
Confocal Laser ◽  
Low Temperature Plasma ◽  
Temperature Plasma ◽  
Innovative Methodology ◽  
Different Response

Samples of duplex stainless steel SAF 2507 were low-temperature plasma nitrided to characterize separately, on the surface, the behavior of its ferrite and austenite phases in relation to two competing processes, that is, one caused by enrichment by nitrogen, resulting in possible expansion, and the other caused by the removal of superficial atoms via sputtering, which may lead to the retraction of the studied phases. Since these phases have different different compositions and crystalline structures, of which the diffusivity and solubility of nitrogen in them are dependent, a different response for each type of phase can be expected. In this article, an innovative methodology has been developed to quantify and clarify which effects are predominant in the course of nitriding for each of these phases. The results indicate that phase expansion prevails over sputtering.

Low-temperature plasma nitriding of AISI F51 duplex stainless steel

2013 ◽  
Vol 232 ◽  
pp. 839-843 ◽  
Author(s):  
Carlos Eduardo Pinedo ◽  
Luis Bernardo Varela ◽  
André Paulo Tschiptschin
Keyword(s):  
Stainless Steel ◽  
Low Temperature ◽  
Duplex Stainless Steel ◽  
Plasma Nitriding ◽  
Low Temperature Plasma ◽  
Temperature Plasma
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