The Effects of Alloying Elements on the Continuous Cooling Transformation Behavior of 2¼Cr-1Mo Steels

Tartaglia, John M.; Kuelz, Alison N.; Thelander, Veronica Hatty

doi:10.1007/s11665-018-3683-1

Cited by 6 publications

(5 citation statements)

References 6 publications

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“…The roulette wheel selection method, single-point crossover, and mutation operators were applied. The fitness function was defined according to Equation (1). Neural networks were used to calculate the value of the fitness function.…”

Section: Ann-ga Hybrid Modelmentioning

confidence: 99%

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A Hybrid Method for Calculating the Chemical Composition of Steel with the Required Hardness after Cooling from the Austenitizing Temperature

Trzaska,

Sitek

2023

Materials

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The article presents a hybrid method for calculating the chemical composition of steel with the required hardness after cooling from the austenitizing temperature. Artificial neural networks (ANNs) and genetic algorithms (GAs) were used to develop the model. Based on 550 diagrams of continuous cooling transformation (CCT) of structural steels available in the literature, a dataset of experimental data was created. Artificial neural networks were used to develop a hardness model describing the relationship between the chemical composition of the steel, the austenitizing temperature, and the hardness of the steel after cooling. A genetic algorithm was used to identify the chemical composition of the steel with the required hardness. The value of the objective function was calculated using the neural network model. The developed method for identifying the chemical composition was implemented in a computer application. Examples of calculations of mass concentrations of steel elements with the required hardness after cooling from the austenitizing temperature are presented. The model proposed in this study can be a valuable tool to support chemical composition design by reducing the number of experiments and minimizing research costs.

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Section: Ann-ga Hybrid Modelmentioning

confidence: 99%

“…The influence of an element should be considered in conjunction with other elements present in the steel, as they can significantly change the interaction with the structure and properties of the steel. The results of research on this subject have been published in numerous publications [ 1 , 2 , 3 , 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Method for Calculating the Chemical Composition of Steel with the Required Hardness after Cooling from the Austenitizing Temperature

Trzaska,

Sitek

2023

Materials

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“…The avoidance of a quenching and tempering process step leads to a bainitic microstructure. To achieve this structure there exist a few rules of thumb: [2][3][4][5][6] 1) The lower the carbon content, the more ductile the material but also the hardness decreases. Bainitic steels usually show a carbon content between 0.05% and 0.35%.…”

Section: Alloying Conceptmentioning

confidence: 99%

Hot Working Tool Steel with Bainitic Microstructure—The Mechanical Properties at Elevated Temperature

Krull¹,

Soest²,

Niederhofer³

et al. 2022

steel research int.

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“…The parameter in the CCT Diagram construction is 950℃ austenitization, grain size 14.5 µm and chemical composition that has been shown in Table 1. [10] and 2¼ Cr-1Mo steel written by Tartaglia [11]. The higher cooling rate can drive force for the transformation, which suppresses the pro-eutectoid ferrite formation, increasing the nucleation sites of bainite.…”

Section: Continuous Cooling Transformation (Cct) Diagram Of Low Ni-cr...mentioning

confidence: 99%

CORROSION BEHAVIOR OF LOW ALLOY Ni-Cr-Mo STEEL AFTER HOT FORGING FOLLOWED BY INTERCRITICAL HEATING FOR WEATHERED RESISTANT FASTENER

Rohmah¹,

Pandhita

Chandra³

2022

JRM

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Low Ni-Cr-Mo alloys is developed by thermomechanical process to obtain high strength, toughness, and great hardenability properties. the aim of this study is to determine the correlation between the microstructure and corrosion properties after hot forging and followed by intercritical heating with cooling rate variation. Low Ni-Cr-Mo steel was homogenized, hot forgings at 950℃, and heat treated at 880℃ with three cooling variations by water, oil, and air. Intercritical heating makes a dual-phase structure. Metallorgaphy and hardness test is confirmed a mechanical properties. OCP and cyclic polarization test is confirmed a corrosion behavior. As the fast-cooling (water quenchant) show the lath martensite, bainite, and a few of acicular ferrite. The hardness of the 75-ton result is slightly lower than the 50-ton load, is reached 591±9.4 VHN for 75-ton and 597±15.6 VHN for 50-ton. Polarization test resulted corrosion resistance sample with 100 ton forging water quench has a high corrosion rate 0.8 mpy, higher than air quench 0.01 mpy.

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The Effects of Alloying Elements on the Continuous Cooling Transformation Behavior of 2¼Cr-1Mo Steels

Cited by 6 publications

References 6 publications

A Hybrid Method for Calculating the Chemical Composition of Steel with the Required Hardness after Cooling from the Austenitizing Temperature

A Hybrid Method for Calculating the Chemical Composition of Steel with the Required Hardness after Cooling from the Austenitizing Temperature

Hot Working Tool Steel with Bainitic Microstructure—The Mechanical Properties at Elevated Temperature

CORROSION BEHAVIOR OF LOW ALLOY Ni-Cr-Mo STEEL AFTER HOT FORGING FOLLOWED BY INTERCRITICAL HEATING FOR WEATHERED RESISTANT FASTENER

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