Surface characterization of plasma nitrided maraging 300 steel
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2016
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BRAZILIAN MRS MEETING, 15th
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Resumo
Maraging steels belong to a class of high strength steels with the combination of
strength and toughness that are among the highest attainable in general
engineering alloys. The term maraging is derived from martensite age hardening
and denotes the age hardening of a low carbon, iron–nickel lath martensite
matrix. These steels typically have very high nickel, cobalt and molybdenum and
very low carbon content [1]. For aeronautical components requiring high strength
and good wear resistance, such as, slat track, maraging steel possesses high
strength, and good wear resistance can be achieved by plasma nitriding process,
without sacrificing the strength of the bulk material [2]. In the present work, the
surface of maraging 300 steel solution annealed and plasma nitrided was studied
by atomic force microscopy (AFM) and microhardness. Samples were solution
annealed at 820ºC for 1 h and then plasma nitrided by passing the gas mixture of
H2 an N2 gases in the ratio of 3:1 under vacuum and it was carried out at 480ºC
for 3 hours. 3D representation of nitrided and un-nitrided samples showed the
nitrided samples with peak-valley structure, and the root mean square increase
from 52 nm to 73 nm after superficial treatment. Plasma nitriding was effective to
increase the microhardness from 331 HV to 1010 HV, and it is associated with the
simultaneous aging and the iron nitrides formed.
Como referenciar
REIS, ADRIANO G. dos; REIS, DANIELI A.P.; ABDALLA, ANTONIO J.; COUTO, ANTONIO A.; SUGAHARA, TARCILA; OTUBO, JORGE. Surface characterization of plasma nitrided maraging 300 steel. In: BRAZILIAN MRS MEETING, 15th, September 25-29, 2016, Campinas, SP. Abstract... São Carlos, SP: Aptor Software, 2016. p. 865-865. Disponível em: http://repositorio.ipen.br/handle/123456789/28076. Acesso em: 30 Dec 2025.
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