2016
DOI: 10.1080/02670836.2016.1142703
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Microstructure evolution of GCr15 in cold ring rolling and following heat treatment

Abstract: The influences of deformation degrees on the microstructure evolution of GCr15 steel in cold ring rolling and following heat treatment (quenching and temper) are investigated in this paper. As the deformation is uneven, microstructure at the outer surface, middle place and inner surface on the cross-section of the ring is selected for the study. The microstructure is characterised by scanning electron microscopy, optical microscopy and X-ray diffraction. The [Formula: see text] transformation is studied with d… Show more

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Cited by 6 publications
(4 citation statements)
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“…Previous experiments have confirmed the significant effect of cold ring rolling on the microstructural evolution of GCr15 bearing steel during quenching and tempering [23]. The main reason for this effect is that the deformed initial microstructures lead to the refinement of austenite grains and the accelerated dissolution of carbides in the subsequent austenitization step [24], thus affecting the microstructure transformation during quenching and tempering [25,26]. However, the influence mechanism of hot deformation on the microstructural evolution of carburized steel during subsequent heat treatment may be more complex.…”
Section: Introductionmentioning
confidence: 83%
“…Previous experiments have confirmed the significant effect of cold ring rolling on the microstructural evolution of GCr15 bearing steel during quenching and tempering [23]. The main reason for this effect is that the deformed initial microstructures lead to the refinement of austenite grains and the accelerated dissolution of carbides in the subsequent austenitization step [24], thus affecting the microstructure transformation during quenching and tempering [25,26]. However, the influence mechanism of hot deformation on the microstructural evolution of carburized steel during subsequent heat treatment may be more complex.…”
Section: Introductionmentioning
confidence: 83%
“…The primary factors affecting the fracture of carbon steel are both the content and morphology of martensite, RA, and carbides. [31][32][33][34] Thus, the causes of the varied mechanical properties from the different treatment processes were analyzed through the microstructures. In the following, the process of traditional heat treatment (QTT), the process with the worst mechanical properties (QCTT), and the process with the best mechanical properties (QTC) will be discussed in detail.…”
Section: Discussion For Mechanism Of Toughness Andmentioning
confidence: 99%
“…However, based on the observed microstructure and grain uniformity, it can be assumed that the appropriate deformation temperature is located at the temperature range of 700°C∼720°C. Furthermore, according to the equations (1), (2) and XRD analysis shown in figure 6, the dislocation density and the volume fraction of carbides in ferrites for the specimens deformed at different temperature can be determined. Normally, the dislocation density increases with the decrease of deformation temperature.…”
Section: Influence Of Deformation Temperature On the Microstructure Amentioning
confidence: 99%
“…GCr15 steel is a kind of traditional high carbon chromium bearing steel, which is widely used in railway components, die making, shipbuilding, aerospace and automotive applications [1]. Due to the poor forming performance of GCr15 steel with the lamellar pearlite, it is difficult to produce complex components by cold forming [2], which limits the use of high carbon steel. For this reason, spheroidization annealing treatment (SAT) is used to obtain the spheroidizing microstructure in which not only helps to restore the ductility, but also helps to maintain the ferrite grain size and reduce deformation resistance [3,4].…”
Section: Introductionmentioning
confidence: 99%