Thermal Stabilization of Austenite During Quenching and Partitioning of Austenite for Automotive Steels

Майсурадзе, М. В.; Рыжков, М. А.

doi:10.1007/s11015-018-0666-2

Cited by 17 publications

(4 citation statements)

References 16 publications

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“…Heat treatment of the studied steel was carried out according to the following modes: 1) QT: heating to 960 °C, 50 min., oil quenching, tempering at 200...600 °C, 3 h, air cooling; 2) QP1: heating to 960 °C, 50 min., isothermal holding at a temperature below Ms for 10 min., oil cooling, tempering at 200 °C, 3 h; 3) QP2: heating to 960 °C, 50 min., isothermal holding at a temperature below Ms for 10 min., isothermal holding at 500 °C, 60 min., oil cooling, tempering at 200 °C, 3 h; 4) QPT: heating to 960 °C, 50 min., isothermal holding at a temperature below Ms for 10 min., oil cooling, tempering at 500 °C, 2 h; 5) AT: heating to 960 °C, 50 min., austempering 270...390 °C, 60 min., oil cooling, tempering at 200 °C, 3 h. The optimal partitioning temperature for QP1, QP2 and QPT modes was calculated to be 270 °C according to the method [8].…”

Section: Methodsmentioning

confidence: 99%

Mechanical Properties of a Mild-Alloy Steel for Aerospace Engineering

Майсурадзе

Рыжков

Лебедев

2021

DDF

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The features of microstructure and mechanical properties of the aerospace high strength steel were studied after the implementation of various heat treatment modes: conventional oil quenching and tempering, quenching-partitioning, austempering. The dependence of the mechanical properties on the tempering temperature was determined. The basic patterns of the formation of mechanical properties during the implementation of isothermal heat treatment were considered. The optimal heat treatment conditions for the studied steel were established.

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Section: Methodsmentioning

confidence: 99%

Mechanical Properties of a Mild-Alloy Steel for Aerospace Engineering

Майсурадзе

Рыжков

Лебедев

2021

DDF

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“…In the wake of the increasing number of vehicles, it is necessary to maintain or even improve the quality of motor vehicle structures and components to improve human safety. Therefore, the automotive industry is actively introducing the 3rd Generation AHSS (Advanced High Strength Steels) [1][2][3][4][5][6][7][8][9][10][21][22], which are used to manufacture high-strength body parts or longitudinal members, door parts, fasteners such as shear bolts, shafts [10][11].…”

Section: Introductionmentioning

confidence: 99%

Advanced high-strength steels for automotive engineering

Юрченко

Simonov²

2023

E3S Web of Conf.

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Diagrams of supercooled austenite decomposition are constructed for new steels of the Kh2G2C2MF alloying system. They provide the application of a science-based approach to the development and improvement of technological heat treatment processes with the use of furnaces with oxidising atmosphere. It is shown that the bainite transformation cannot exist separately from the martensite transformation even at slow cooling speeds. Regimes of heat treatment are selected, providing a possibility to receive the necessary structure for formation of a required complex of mechanical properties in a wide range. It is established that the most perspective heat treatment regime scheme from the point of view of time savings is continuous cooling from the heating temperature. It is revealed that the main structural components of steels after various heat treatment regimes are bainite and martensite, whose ratio determines the mechanical characteristics. Bainite is carbide-free, which favourably influences the complex of mechanical characteristics. The excessive ferrite and ferrite-carbide mixture formed in the structure at slow rates of continuous cooling in the upper temperature range do not affect the mechanical properties since their amount is insignificant. It is established that new economically alloyed steels with chromium, manganese, silicon, molybdenum, vanadium, and different carbon content belong to third-generation automotive steels, which gives prospects of using this material for manufacturing various automotive parts to improve the entire structure.

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“…Los productores de acero para la industria automotriz han desarrollado aceros avanzados de alta resistencia (AHSS) que tienen un mejor conjunto de propiedades mecánicas como alta tenacidad, absorción de energía de impacto y resistencia mecánica , en comparación con los aceros tradiciones como el bajo carbono, aceros al manganeso y aceros micro aleados (Maisuradze & Ryzhkov, 2018) Las propiedades mecánicas en estos aceros se determinan principalmente por la composición química, tratamiento térmico que se les efectúa (Bhadeshia & Edmonds, 1983), Un método alternativo cuyo fin es evitar la distorsión y el agrietamiento asociados al temple y revenido convencional es el tratamiento térmico de austemperizado. El proceso implica la transformación de austenita en bainita, dando como resultado una mejor ductilidad, niveles altos de dureza y una mayor resistencia al impacto (Rowe, 2016) y (Rajan et al, 2012).…”

Section: Introductionunclassified

Transformaciones de fases durante el tratamiento térmico de austemperizado en un acero 0.41%C - 0.7%Mn - 2.15%Si - 0.013%Al

García-Ramírez

López-Hirata

Saucedo‐Muñoz

et al. 2022

ICBI

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En este trabajo se analizó las transformaciones de fase que ocurren en un acero avanzado de alta resistencia (AHSS) 0.41%C - 0.7%Mn - 2.15%Si - 0.013%Al, que se emplea en la industria automotriz para la fabricación de chasis y carrocería debido a sus optimas propiedades mecánicas como absorción de energía de impacto y tenacidad. El software Thermo-Calc permitió predecir las fases presentes como ferrita y carburos en estado inicial y la presencia de austenita, ferrita, bainita y carburos después del tratamiento térmico. Los resultados calculados por Thermo Calc; diagrama TTT concuerdan con lo observado en las micrografías y DRX. Los resultados del tratamiento térmico de austemperizado indican una microestructura compuesta de bainita fina, austenita retenida y carburos M7C3, mejorando sus propiedades mecánicas, principalmente dureza y resistencia máxima, 61 HR30N y 1513 MPa, respectivamente, en comparación con el estado inicial, 45 HR30N y 856 MPa.

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Thermal Stabilization of Austenite During Quenching and Partitioning of Austenite for Automotive Steels

Cited by 17 publications

References 16 publications

Mechanical Properties of a Mild-Alloy Steel for Aerospace Engineering

Mechanical Properties of a Mild-Alloy Steel for Aerospace Engineering

Advanced high-strength steels for automotive engineering

Transformaciones de fases durante el tratamiento térmico de austemperizado en un acero 0.41%C - 0.7%Mn - 2.15%Si - 0.013%Al

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