The microstructure and phase composition of 35CrSiMn5-5-4 steel after quenching and partitioning heat treatment

Emilia Skołek , Krzysztof Wasiak , Wiesław Świątnicki

Abstract

The aim of the study was to characterise the microstructure of 35CrSiMn5-5-4 steel which was subjected to a new heat treatment technology of quenching and partitioning (Q&P). The parameters of the treatment were chosen on the basis of computer simulations and dilatometric studies of phase transformations occurring in steel. The transmission electron microscopy (TEM) observations of steel microstructure after the Q&P treatment revealed the presence of martensite as well as significant amount of retained austenite in form of layers between the martensite laths. The rod-like carbides in the ferritic areas were also observed, which indicates the presence of lower bainite in steel. It was found that the retained austenite content measured by means of TEM was about 28% for partitioning at 400°C and 25% for partitioning at 260°C. These results are in good agreement with the phase composition calculated theoretically as well as those determined experimentally by use of dilatometric tests.
Author Emilia Skołek ZIP
Emilia Skołek,,
- Division of Surface Engineering
, Krzysztof Wasiak ZIP
Krzysztof Wasiak,,
- Division of Surface Engineering
, Wiesław Świątnicki ZIP
Wiesław Świątnicki,,
- Division of Surface Engineering
Journal seriesArchives of Metallurgy and Materials, ISSN 1733-3490
Issue year2016
Vol61
No3
Pages1683-1688
Publication size in sheets0.5
Keywords in PolishProces niepełnego hartowania i partycjonowania, mikrostruktura austenityczno-martenzytyczna, badania dylatometryczne, skład fazowy
Keywords in Englishquenching and partitioning treatment, astenitic-martensitic microstructure, dilatometric studies, phase composition
DOIDOI:10.1515/amm-2016-0274
URL http://www.imim.pl/files/archiwum/Vol3_2016/65.pdf
Languageen angielski
Score (nominal)30
ScoreMinisterial score = 0.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 30.0, 28-11-2017, ArticleFromJournal
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