Study on Decarburization Mechanism and Law of GCr15 Bearing Steel during Heat Treatment

Wang, Hui; Su, Fuyong; Wen, Zhipeng

doi:10.1155/2022/3723680

Cited by 3 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The essence of bearing steel heat treatment is to control its microstructure by controlling the temperature change process of bearing steel. For example, the transformation rate of inclusions is affected by temperature [26], and the variation in holding time is related to the decarburization of bearing steel [27]. Therefore, the precise measurement and control of temperature are key to ensuring the quality of heat treatment of bearing steel.…”

Section: Heat Treatment Process Of Bearing Steel Based On Digital Twinmentioning

confidence: 99%

Application of Life Cycle of Aeroengine Mainshaft Bearing Based on Digital Twin

Yan³

et al. 2023

Processes

View full text Add to dashboard Cite

Aeroengine mainshaft bearings are key components in modern aeroengines, and their main functions are to support the rotation of the main shaft of the aeroengine in harsh environments, such as high temperature, heavy load, high speed and oil break; reduce the friction coefficient during the high-speed rotation of the main shaft; and reliably ensure the rotation accuracy and power transmission of the aeroengine’s main shaft during operation. The manufacture of aeroengine mainshaft bearings requires complex processes and precise machining to ensure high performance and reliability, and how to intelligently complete the production and manufacture of mainshaft bearings and ensure the strength and accuracy of the bearings, quickly distinguish the fault types of the bearings and efficiently calculate, analyze and predict the life of the bearings are the current research hotspots. Therefore, building a high-fidelity and computationally efficient digital twin life cycle of aeroengine mainshaft bearings is a valuable solution. This paper summarizes the key manufacturing technology, manufacturing mode and manufacturing process based on digital twins in the life cycle of aeroengine mainshaft bearings, including the metallurgical process, heat treatment process and grinding process of aeroengine mainshaft bearings. It presents a fault diagnosis and life analysis of mainshaft bearings of aeroengines, discussing the key technologies and research directions of the life cycle of mainshaft bearings based on digital twins.

show abstract

Section: Heat Treatment Process Of Bearing Steel Based On Digital Twinmentioning

confidence: 99%

Application of Life Cycle of Aeroengine Mainshaft Bearing Based on Digital Twin

Yan³

et al. 2023

Processes

View full text Add to dashboard Cite

show abstract

“…As the depth of the decarburized layer increases, the fatigue limit of the material decreases [23]. Additionally, the decarburized layer changes the damage mechanism of the rail steel and influences the surface microstructure, hardness, wear, and fatigue resistance [24,25]. It has been observed that the reduction of the decarburized layer positively affects the material's fatigue resistance and service performance [26,27].…”

Section: Introductionmentioning

confidence: 99%

Comparative Fatigue Performance of Decarburized Surfaces in Railway Rails

Muttamara,

Sommanat,

Kanchanomai

et al. 2024

Materials

View full text Add to dashboard Cite

This study explores the comparative fatigue performance of decarburized surfaces in railway components, emphasizing rolling contact fatigue, crack propagation, and acoustic emission. The investigation entails the examination of two grades of railway steels, namely R260 and U71Mn, to analyze crack and surface characteristics subsequent to fatigue testing employing a Twin Roller Machine. The purpose is to discern the impact of decarburization on the fatigue life of these materials. The results reveal distinct patterns in crack propagation and acoustic emission between decarburized and non-decarburized surfaces, providing valuable insights into the fatigue behavior of railway components. This comparative analysis contributes to a nuanced understanding of the material’s response to cyclic loading.

show abstract

Formation Mechanism and Influence of Heating Temperature and Holding Time on Surface Decarburization of 40Cr Steel during Hot Forging Process

Yuan,

Wu,

et al. 2024

steel research int.

View full text Add to dashboard Cite

During hot forging and heat treatment of 40Cr steel, a decarburized layer emerges on the surface, affecting fatigue life. However, the decarbonization of 40Cr steel has not been reported so far. The experiment mainly studies the effect of holding temperature and time on decarbonization. The 40Cr steel undergoes complete decarburization at 700 and 750 °C while experiencing a combination of complete and partial decarburization at 800 °C, transitioning solely to partial decarburization above 850 °C. The decarburized layer thickness measured at 750 and 800 °C is 140 and 200 μm respectively; the total decarburization layer thickness exhibits an exponential increase with the temperature. The thickness of the completely decarburized layer, influenced by varying factors across temperature ranges, initially rises and subsequently declines with the escalation of temperature, reaching its maximum at ≈750 °C. The maximum value of complete decarburization is 146 μm. Simultaneously, the total depth of decarburization is found to be proportional to the square root of time, adhering to Fick's second law. The fitting result is expressed as x = 165.47t1/2 at 750 °C. Notably, the existence of the decarburized layer results in a decrement in both the tensile strength and yield strength of the component, albeit accompanied by a marginal improvement in ductility.

show abstract

Study on Decarburization Mechanism and Law of GCr15 Bearing Steel during Heat Treatment

Cited by 3 publications

References 22 publications

Application of Life Cycle of Aeroengine Mainshaft Bearing Based on Digital Twin

Application of Life Cycle of Aeroengine Mainshaft Bearing Based on Digital Twin

Comparative Fatigue Performance of Decarburized Surfaces in Railway Rails

Formation Mechanism and Influence of Heating Temperature and Holding Time on Surface Decarburization of 40Cr Steel during Hot Forging Process

Contact Info

Product

Resources

About