Improving impact toughness of high-C–Cr bearing steel by Si–Mo alloying and low-temperature austempering

Zhao, Jiali; Zhao, Teng; Hou, Chun-Ping; Zhang, F.C.; Wang, T.S.

doi:10.1016/j.matdes.2015.07.055

Cited by 38 publications

(12 citation statements)

References 28 publications

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“…For the HC steel, the specimens for the RCF tests were machined from the spheroidized annealed steel bars. The spheroidizing annealing process is the same as that used in [ 24 ]. Then, the specimens were austenitized at 860 °C for 1 h and austempered at 210 °C for 4 h in the molten salt.…”

Section: Methodsmentioning

confidence: 99%

Rolling Contact Fatigue Performances of Carburized and High-C Nanostructured Bainitic Steels

et al. 2016

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In the present work, the nanostructured bainitic microstructures were obtained at the surfaces of a carburized steel and a high-C steel. The rolling contact fatigue (RCF) performances of the two alloy steels with the same volume fraction of undissolved carbide were studied under lubrication. Results show that the RCF life of the carburized nanostructured bainitic steel is superior to that of the high-C nanostructured bainitic steel in spite of the chemical composition, phase constituent, plate thickness of bainitic ferrite, hardness, and residual compressive stress value of the contact surfaces of the two steels under roughly similar conditions. The excellent RCF performance of the carburized nanostructured bainitic steel is mainly attributed to the following reasons: finer carbide dispersion distribution in the top surface, the higher residual compressive stress values in the carburized layer, the deeper residual compressive stress layer, the higher work hardening ability, the larger amount of retained austenite transforming into martensite at the surface and the more stable untransformed retained austenite left in the top surface of the steel.

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Section: Methodsmentioning

confidence: 99%

Rolling Contact Fatigue Performances of Carburized and High-C Nanostructured Bainitic Steels

et al. 2016

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“…The nanostructured bainite was first studied by Bhadeshia and his coworkers. [20,23] Novel high-C-Cr nanostructured bainitic bearing steels GCr15SiAl by Si-Al alloying and GCr15Si1Mo by Si-Mo alloying were developed at 2015 [19][20][21]. Research results showed that the fully nanostructured bainitic microstructure not only had excellent strength and toughness, but also had the optimal wear resistance compared with the mix microstructure of nanostructured bainite, martensite and retained austenite (Table 2 & Figure 3).…”

Section: Introductionmentioning

confidence: 99%

Research and Application Progress of Nanostructured Bainitic Steel in Bearings

Zhang¹,

Wang²,

Yang³

et al. 2017

MSEIJ

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The research and application progress of nanostructured bainitic steel in bearing manufacturing field at home and abroad are summarized in detail. Some problems on the application of nanostructured bainite on bearing that need to be solved are proposed, such as short period process, the appropriate working condition and prediction of service life. The solution of these problems will promote the application of nanostructured bainite on bearing.Keywords: Nanostructured bainite; Bearing steel; Wear resistance; Rolling contact fatigue; Progress They reported that the nanostructured bainitic microstructure consisting of 20-40 nm thick bainitic ferrite plates dispersed in retained austenite matrix exhibited a hardness value in excess of 650 HV30, a tensile strength of ~2.3 GPa and a toughness of 30-40 MPa·m 1/2 [1-3]. The nanostructured bainitic microstructure, which is shown in Figure 1, was formed in high-carbon Sirich steels by austempering at 125-350 °C for a long time. The nanostructured bainite is also known as hard bainite owing to its high hardness, low temperature bainite because of its low transformation temperature, super bainite due to its excellent mechanical properties.Recent years, the microstructure and mechanical properties of the nanostructured bainitic steels have been extensively studied [4][5][6][7][8][9]. Meanwhile, the material researchers and the bearing production enterprises have realized the great potential of the application of nanostructured bainite in bearings and carried out the related research work gradually. This paper mainly introduces the research and application progress of the nanostructured bainitic steel in the field of bearings.

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“…Although toughness may be affected by many factors, like microstructure, inclusions, processes, and even exposure to radiation, there has been growing interest in the effects of corrosion and how to avoid them. Recent studies have looked at for example, untreated SAE 1020 steel, its atmospheric corrosion resistance, and corrosion effects on its mechanical properties in different environments located in Chile.…”

Section: Introductionmentioning

confidence: 99%

Study on the effect of atmospheric corrosion on mechanical properties with impact test: Carbon steel and Galvanized steel

Vera

Araya

Garín

et al. 2019

Materials & Corrosion

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The present work presents the behavior of carbon steel and galvanized steel against atmospheric corrosion after 3 years of exposure at seven locations around the region of Valparaiso, Chile. Results show a relation between corrosion rates and environmental and meteorological conditions, categorized as CX for the Quintero zone, and C3 and C2 in the remaining six zones. Corrosion rate behaviors and material toughness losses were modeled using power functions and neural networks, found to be a function of environmental exposure time. Losses were greater for carbon steel in coastal and industrial environments, reaching 70 to 80%. This effect was reduced in galvanized steel, not exceeding 15% over the same period of exposure. The relationship between corrosion rate and loss of toughness of both materials was modeled using neural networks. K E Y W O R D S atmospheric corrosion, carbon steel, galvanized steel, industrial environments, marine environments, SEM, toughness, weight loss, XRD

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Improving impact toughness of high-C–Cr bearing steel by Si–Mo alloying and low-temperature austempering

Cited by 38 publications

References 28 publications

Rolling Contact Fatigue Performances of Carburized and High-C Nanostructured Bainitic Steels

Rolling Contact Fatigue Performances of Carburized and High-C Nanostructured Bainitic Steels

Research and Application Progress of Nanostructured Bainitic Steel in Bearings

Study on the effect of atmospheric corrosion on mechanical properties with impact test: Carbon steel and Galvanized steel

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