Optionen einer nachhaltigen Energietechnik

Weinhold, M.

doi:10.1007/978-3-8274-2798-4_12

Cited by 2 publications

(5 citation statements)

References 2 publications

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“…Mainly due to rolling contact fatigue (RCF), however, they often do not reach the expected life span . Preliminary component replacement leads to increased warranty and maintenance costs …”

Section: Introductionmentioning

confidence: 99%

“…[2] Preliminary component replacement leads to increased warranty and maintenance costs. [3,4] At the same time, downsizing and weight reduction of such high-performance components are pursued in order to save energy and preserve resources by increasing machine loads. [4,5] This increases the demands on the bearing steels used for high-performance components.…”

Section: Introductionmentioning

confidence: 99%

“…[3,4] At the same time, downsizing and weight reduction of such high-performance components are pursued in order to save energy and preserve resources by increasing machine loads. [4,5] This increases the demands on the bearing steels used for high-performance components. In order to prevent component failure and enable downsizing, fail-safe, damage-tolerant steels with high-bearing capacity are needed.…”

Section: Introductionmentioning

confidence: 99%

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On the Microstructure and Properties of a High Al-Alloyed 100Cr6 Steel

Bambach�

Stieben

Bleck

2015

steel research int.

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Macroscopic failure of high-performance components such as the bearings in a gearbox of wind converters is usually caused by effects occurring on a microscopic scale, e.g., crack initiation at non-metallic inclusions. Failure of these components leads to high maintenance costs. This work focuses on modifying the chemical composition of the standard bearing steel 100Cr6 in order to increase its strain-hardening potential, and thus its damage tolerance while maintaining the degree of cleanliness. Al alloying is used to adjust a suitable combination of strengthening mechanisms. Dilatometric and metallographic analyses are performed to identify the phase transformation behavior and the microstructure constituents of the designed alloy. Special attention is paid to the formation and morphology of the k-phase, a Fe 3 AlC-phase which contributes to the strainhardening potential of the material. The mechanical properties are determined at several heat-treatment states and compared to the ones of conventional 100Cr6 steel. It is shown that the k-phase may be used for tailoring the strain-hardening potential during local plastic deformation, and thus reduce stress concentrations at inclusions.

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“…Mainly due to rolling contact fatigue (RCF), however, they often do not reach the expected life span . Preliminary component replacement leads to increased warranty and maintenance costs …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the Microstructure and Properties of a High Al-Alloyed 100Cr6 Steel

Bambach�

Stieben

Bleck

2015

steel research int.

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“…Thus, high performance components such as gear wheels often do not reach the desired service life. The warranty and maintenance costs are increased because of preliminary component replacement [5,6]. At the same time, downsizing and weight reduction of such high performance components are needed in order to save energy and preserve resources by increasing machine loads [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…The warranty and maintenance costs are increased because of preliminary component replacement [5,6]. At the same time, downsizing and weight reduction of such high performance components are needed in order to save energy and preserve resources by increasing machine loads [6,7]. Thus, alternative approaches to the reduction of steel cleanliness are necessary to improve the RCF-behavior of carburized gear wheels and enable downsizing.…”

Section: Introductionmentioning

confidence: 99%

18CrNiMo7-6 with TRIP-Effect for Increasing the Damage Tolerance of Gear Components — Part I: Alloy Design

Bambach�

Stieben

Bleck

2014

MSF

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High performance components such as gear wheels shall be resistant to rolling-contactfatigue. This type of failure is usually caused by effects occurring on a microscopic scale, such ascrack initiation at non-metallic inclusions. Much effort has been invested so far in improving thesteel cleanliness. However, these high performance components often do not reach the desiredservice life. Preliminary failure within the guarantee terms still occurs which leads to high warrantycosts. Alternative to improving steel cleanliness, the damage tolerance of high performancecomponents could be increased by inducing the TRIP-effect around the crack tip. Due to high localstrain hardening, martensite transformation occurs. The high compressive stresses related to it coulddelay or stop crack propagation by reducing stress concentrations via plastic deformation. As aresult, rolling-contact fatigue resistance of carburized steels may be increased and preliminaryfailure may be avoided. Part I of this study focuses on modifying the chemical composition ofconventional 18CrNiMo7-6 steel with Al to develop a high-strength, yet ductile matrix with a highwork hardening potential. Dilatometric tests on laboratory melts analyze the possibility of adjustinga microstructure able to produce a TRIP-effect. Both isothermal annealing and Quenching andPartitioning (Q&P) are used to stabilize residual austenite and optimum process routes areidentified.

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Optionen einer nachhaltigen Energietechnik

Cited by 2 publications

References 2 publications

On the Microstructure and Properties of a High Al-Alloyed 100Cr6 Steel

On the Microstructure and Properties of a High Al-Alloyed 100Cr6 Steel

18CrNiMo7-6 with TRIP-Effect for Increasing the Damage Tolerance of Gear Components — Part I: Alloy Design

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