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Pearlite

About: Pearlite is a research topic. Over the lifetime, 6028 publications have been published within this topic receiving 65695 citations.


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Journal ArticleDOI
TL;DR: In this paper, the isothermal bainite formation of austenite with and without pre-strain was investigated in an alloyed eutectoid steel of Fe 0.80C-0.27Si 0.61Mn 0.15V (wt%).
Abstract: The isothermal bainite formation of austenite with and without pre-strain has been investigated in an alloyed eutectoid steel of Fe–0.80C–0.27Si–0.61Mn–0.15V (wt.%). It is found that the isothermal decomposition of deformed austenite within the regimes of bainite and finer pearlite is significantly promoted as the incubation period is remarkably shortened for small strain (e.g. 2%) and almost vanishes for strain larger than 5%. According to the TTT curves obtained for deformed (2%) and non-deformed austenite, B s (B s for isothermal bainite formation) for deformed austenite is about 10 °C higher than that for the latter. On the basis of the diffusion mechanism of bainite formation, the experimental results are explained by taking account of defects brought about by plastic deformation.

34 citations

Journal Article
TL;DR: In this paper, the microstructure evolution during dynamic recrystallization and the deformation characteristics of a low carbon steel within the temperature range of 600-700℃ and a strain rate range of 10-3 to 10 s-1 have been investigated by means of thermal-compression simulation test, SEM, TEM and EBSD.
Abstract: The microstructure evolution during dynamic recrystallization and the deformation characteristics of a low carbon steel within the temperature range of 600-700℃ and a strain rate range of 10-3 to 10 s-1 have been investigated by means of thermal-compression simulation test, SEM, TEM and EBSD. In order to understand the effect of microstructure on dynamic recrystallization behaviour, two different microstructures were adopted, which consist of ferrite plus pearlite and ferrite plus fine cementite particles respectively. The results show that dynamic recrystallization takes place in these two cases. However, in the microstructure with pearlite higher strain is needed to start recrystallization and reach the steady state, comparing with the microstructure with fine cementite particles. The measurement confirms that ferrite with smaller grain size in steady state can be obtained in microstructure with ferrite and cementite, which indicates a more significant effect of separately distributed fine cementite particles on promoting recrystallization nucleation and hindering the grain growth than that of pearlite.

34 citations

Journal ArticleDOI
TL;DR: In this article, the effects of annealing temperature and time, and accumulated strain on the morphology of cementite and mechanical properties were studied, and the results indicated that the application of the severe plastic deformation can improve the kinetics of spheroidization significantly.
Abstract: Spheroidization behavior of cementite in a low carbon steel processed by the equal channel angular pressing technique was investigated The effects of annealing temperature and time, and accumulated strain on the morphology of cementite and mechanical properties were studied The results indicated that the application of the severe plastic deformation can improve the kinetics of spheroidization significantly In this study, the enhanced spheroidization kinetics was discussed in terms of carbon dissolution from cementites and defects induced in cementites by the severe plastic deformation In addition, the softening of the steel after the spheroidization treatment was evaluated

34 citations

Journal ArticleDOI
TL;DR: The premature failure of two forged and induction hardened low alloy steel work rolls used for cold rolling of high and medium carbon steel was investigated in this paper, where the microstructure of the spalling surface presented tempered martensite, dispersed chromium carbides and spheroidised pearlite.

34 citations

Patent
11 Jul 2005
TL;DR: In this article, a steel sheet which has a composition consisting of, by mass, 0.1 to 0.4%, 0.001 to 3.0%, 1.5 to 4.0% Si, 1.1% P, ≤0.05% S, 0,005 to 0,1% Al, ≤ 0.01% N and the balance Fe with inevitable impurities was heated at 1 to 100°C/sec heating rate, held in a temperature region of 700 to 850°C for 10 to 6,000 sec and then press formed in a
Abstract: PROBLEM TO BE SOLVED: To provide a steel sheet for press forming having a high strength of 780 to 1,180 N/mm 2 class and excellent ductility after forming and its forming method and also to provide automotive parts using the steel sheet for press forming. SOLUTION: A steel sheet which has a composition consisting of, by mass, 0.1 to 0.4% C, 0.001 to 3.0% Si, 1.5 to 4.0% Mn, ≤0.1% P, ≤0.05% S, 0.005 to 0.1% Al, ≤0.01% N and the balance Fe with inevitable impurities and also has a microstructure composed of ferrite and pearlite or of ferrite, cementite and pearlite is heated at 1 to 100°C/sec heating rate, held in a temperature region of 700 to 850°C for 10 to 6,000 sec and then press formed in a temperature region of 550 to 700°C. The resultant formed steel sheet has a structure consisting of, by area ratio after cooling, 40 to 90% ferrite as a main phase, 10 to 60% martensite as a second phase and the balance bainite. COPYRIGHT: (C)2007,JPO&INPIT

34 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023148
2022326
2021218
2020271
2019291
2018221