Microstructure of martensite in Fe–C–Cr steel

Yaso, Muneo; Morito, Shigekazu; Ohba, Takayoshi; Kubota, K.

doi:10.1016/j.msea.2007.03.114

Cited by 14 publications

(14 citation statements)

References 5 publications

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“…In previous papers, 10,11) we reported the difference in the morphology of martensite and retained austenite depending on austenitizing temperature and solute carbon in matrix. The film type retained austenites were found at the lath boundaries for 12Cr and 8Cr steel, and block type retained austenites were found for 8Cr steel.…”

Section: Introductionmentioning

confidence: 89%

Characteristics of Retained Austenite in Quenched High C-High Cr Alloy Steels

et al. 2009

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In this paper, the morphologies of martensite and retained austenite for 1.5 mass%C-12 mass%Cr and 1 mass%C-8 mass%Cr steels were observed by means of optical microscopy, XRD, SEM/EBSD and TEM. The amount of retained austenites was quantitatively investigated and compared with XRD, EBSD and TEM observation methods. The retained austenites were distributed in the form of a block type and a film type in the martensite structures. For the 1.5 mass%C-12 mass%Cr steel, the amount of block type retained austenite and film type one are almost equal in three distinct regions of carbide; primary carbide, secondary carbide and without carbide. In the case of 1 mass%C-8 mass%Cr steel, as to film type retained austenite there are not so much differences among those regions. However, block type retained austenites are distributed with much amount, especially in the region around primary carbide.

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Section: Introductionmentioning

confidence: 89%

Characteristics of Retained Austenite in Quenched High C-High Cr Alloy Steels

et al. 2009

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“…This confirms the absence of martensite and increased retained austenite which softens the sample. The softening occurred when the M 7 C 3 carbides start to coarsen and martensite less tetragonal [21,22,23].…”

Section: Effect Of Heat Treatment On the Hardnessmentioning

confidence: 99%

Effect of Heat Treatment on the Microstructure and Mechanical Properties of a Welded AISI 410 Martensitic Stainless Steel

Ezechidelu¹,

Enibe²,

Obikwelu³

et al. 2016

International Advanced Research Journal in Science, Engineering

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Although martensitic stainless steel materials are not used in large quantities compared to austenitic and ferritic grades, they play a huge and often unseen part in our modern world due to their combination of strength, toughness and moderate corrosion resistance. However, after welding the martensitic stainless steel tend to lose their mechanical/microstructural integrity. In this study, the microstructures and mechanical properties of a welded AISI 410 martensitic stainless steel after different heat treatments were studied, with aims to restore the hardness and improve grain refinement of the materials. The results show that the structures of the steel after austenitizing treatment at 1020°C are of lath martensite mixed with a small amount of retained austenite. Apart from TP2 specimen, where martensite phase was transformed into ferrite structure, the structures of the tempered steel are mixtures of tempered martensite, carbides and reversed austenite dispersed in the martensite matrix. The result indicated that the tempering regimens (500, 600 and 700°C) carried out improved the hardness and grain refinement leading to the existence of finely distributed carbides in the materials. TheTP3 specimen experienced secondary hardening phenomenon, displays the best comprehensive mechanical properties and has the highest hardness value of 370.7 HV close to the parent metal after tempering at 700 °C.

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“…The measured volume fraction of retained austenite determined by XRD analysis for both the tempered Cr6C9 and STD11 specimens before deformation was less than 2 vol. % since the tempering temperature of 520 • C was high enough to decompose the retained austenite into ferrite and cementite [6,8,9]. Thus, the effect of the retained austenite on the mechanical properties is negligible depending on the steel alloy composition.…”

Section: Methodsmentioning

confidence: 99%

“…Thus, the effect of the retained austenite on the mechanical properties is negligible depending on the steel alloy composition. ferrite and cementite [6,9,18]. Thus, the effect of the retained austenite on the mechanical properties is negligible depending on the steel alloy composition.…”

Section: Methodsmentioning

confidence: 99%

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Microstructural and Mechanical Characteristics of Novel 6% Cr Cold-Work Tool Steel

Kang

Kim

Lee

2017

Metals

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Abstract:We investigated a new cold-work tool steel with a low Cr content of 6 wt. % which was designed based on thermodynamic calculation to minimize the formation of primary carbide. A smaller particle size and a smaller volume fraction of carbides were observed in this 6% Cr steel. Superior mechanical properties in terms of hardness, impact toughness, tensile strength, and total elongation were achieved in this steel, due to fine secondary carbides precipitated during tempering. These carbide particles were M 6 C and (Mo,V)C carbides with a diameter below 100 nm.

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Microstructure of martensite in Fe–C–Cr steel

Cited by 14 publications

References 5 publications

Characteristics of Retained Austenite in Quenched High C-High Cr Alloy Steels

Characteristics of Retained Austenite in Quenched High C-High Cr Alloy Steels

Effect of Heat Treatment on the Microstructure and Mechanical Properties of a Welded AISI 410 Martensitic Stainless Steel

Microstructural and Mechanical Characteristics of Novel 6% Cr Cold-Work Tool Steel

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