Microstructure evolution and mechanical properties of X12CrMoWVNbN10-1-1 steel during quenching and tempering process

Tao, Xingang; Li, Chuanwei; Han, Lizhan; Gu, Jianfeng

doi:10.1016/j.jmrt.2015.06.001

Cited by 26 publications

(8 citation statements)

References 20 publications

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“…At the same time, with the increase in temperature, the migration ability of grain boundaries in the alloy is gradually enhanced. Thus, the strength, hardness and plasticity of the material are improved [35]. In conclusion, strain, strain rate and temperature are important parameters affecting hot deformation behaviour of X12CrMoWVNbN10-1-1 alloy steel.…”

Section: Establishment Of a 3-d Hot Processing Mapmentioning

confidence: 92%

Hot Workability of Ultra-Supercritical Rotor Steel Using a 3-D Processing Map Based on the Dynamic Material Model

Chen

Lian

et al. 2020

Materials

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As a new-type of ultra-supercritical HI-IP rotor steel, X12CrMoWVNbN10-1-1 alloy steel has excellent integrative performance, which can effectively improve the power generation efficiency of the generator set. In this paper, uniaxial thermal compression tests were carried out over a temperature range of 950–1200 °C and strain rates of 0.05–5 s−1 with a Gleeble-1500D thermal simulation testing machine. Moreover, based on hot compression experimental data and the theory of processing diagrams, in combination with the dynamic material model, a three-dimensional (3-D) thermal processing map considering the effect of strain was constructed. It was concluded that optimum thermal deformation conditions were as follows: the temperature range of 1150–1200 °C, the strain rate range of 0.05–0.634 s−1. Through secondary development of the finite element (FE) software FORGE®, three-dimensional thermal processing map data were integrated into finite element software FORGE®. The distributions of instability coefficient and power dissipation coefficient were obtained over various strain rates and temperatures of the Ø 8 × 12 mm cylinder specimen by using finite element simulation. It is shown that simulation results are consistent with the microstructure photos. The method proposed in this paper, which integrates the three-dimensional processing map into the finite element software FORGE® (Forge NxT 2.1, Transvalor, Nice, France), can effectively predict the formability of X12CrMoWVNbN10-1-1 alloy steel.

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Section: Establishment Of a 3-d Hot Processing Mapmentioning

confidence: 92%

Hot Workability of Ultra-Supercritical Rotor Steel Using a 3-D Processing Map Based on the Dynamic Material Model

Chen

Lian

et al. 2020

Materials

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“…The cosα and sinα graphs of residual stresses are discussed in the section 'Results and discussion'. MRR was calculated for each finished specimen by using equation (2). The weights of each specimen were taken on electronic weighing devices before and after turning operations.…”

Section: Cnc Turningmentioning

confidence: 99%

“…The tempering process reduces the brittleness as well as stresses of the alloy steel without significantly lowering its hardness and strength. Tao et al 2 investigated the heat treatment (570°C for 18 h and 690°C for 24 h) effect on the microstructure and mechanical properties of X12CrMoWVNbN10-1-1steel. Further, results revealed a typical lath martensite structure along with some retained austenite in the absence of delta ferrite form in austenitized phase sample.…”

Section: Introductionmentioning

confidence: 99%

“…Jena et al 4 have investigated the heat treatment (austenitized at 910°C and followed by tempering at 200°C, 300°C, 400°C, 500°C and 600°C) on mechanical, ballistic 1 Mechanical Engineering Department, Delhi Technological University, India 2 Mechanical Engineering Department, G.L. Bajaj Institute of Technology and Management, India and microstructural properties of ultra-high-strength armour steel.…”

Section: Introductionmentioning

confidence: 99%

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Experimental analysis of mechanical behaviour and residual stresses of EN-36C alloy steel with and without tempering

Maurya

Niranjan

2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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The intense demands of nickel chromium case hardened steel (EN-36C) alloy steel in different engineering applications are increasing day by day due to its cheap and easy availability. The effect of different stages of tempering on EN-36C alloy steel has been carried out to check the mechanical behavioural, microstructural properties and residual stresses in the present work. The effect of tempering on response variables viz., material removal rate, surface roughness, tool tip temperature and residual stresses are evaluated. The cosα method is used to measure the residual stresses in the specimen using two-dimensional detectors such as imaging plates. Further, the influence of tempering on mechanical properties such as tensile strength, hardness, toughness and percentage elongation has been observed. Experimental results depicted that the ductility and toughness are improved without significant change in hardness in the specimen tempered at 500°C. The mechanical properties of specimens tempered at 500°C are found to be a tensile strength of 680.42 MPa, hardness 92 Rockwell hardness of scale B and toughness 187 J. The maximum value of material removal rate (12596.80 mm3/min), minimum tool tip temperature (61.33°C), average surface roughness ( Ra = 1.93, Rq = 2.36, Rz = 10.30) and lowest residual stress 217 MPa are observed in the specimens tempered at 500°C.

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“…Quenching and tempering (QT) process is one of the widely used heat-treatment processes in the manufacturing industry. Quenching process develops carbon supersaturated α′ phase, while subsequent tempering diffuses excess carbon of α′ phase into retained γ phase [5][6][7]. Lath martensitic transformation during the QT process divides the prior γ grain into many packets and further subdivided each packet into blocks of parallel aligned laths.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and corrosion properties of medium carbon low alloy steel after cyclic quenching and tempering heat–treatments

Hafeez

Inam

Farooq

2020

Mater. Res. Express

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Cyclic quenching and tempering (QT) heat-treatment processes have the potential to improve the mechanical properties of steel due to the formation of fine grain size microstructure. This work aims to investigate the mechanical and corrosion properties of experimental medium carbon low alloy steel under cyclic heat-treatment processes. Cyclic single quenching and tempering (SQT), double quenching and tempering (DQT), and triple quenching and tempering (TQT) heat-treatment processes were carried out on the medium carbon low alloy steel. X-ray diffraction analysis validated the formation of fine ε-carbide (Fe 2.4 C) after intermediate low-temperature tempering in DQT and TQT heat-treatments. These fine carbides provided preferential nucleation sites for the formation of new austenitic grain, resulting in a refined microstructure composed of supersaturated (carbon) lath martensite (α′) and retained austenite (γ). The DQT and TQT heat-treatments improved 19% tensile strength, 100% elongation, and 95% impact absorption energy in comparison to SQT heat-treatment. DQT and TQT heat-treatments also transformed the brittle behavior of SQT steel into a ductile behavior. It was also revealed by the small number and size of dimples along with a large number of short tear ridges in fractographs. Morphology of corrosion products of heattreated experimental steel was also studied in a 5% NaCl solution. The SQT heat-treated sample showed porous morphology of corrosion products, while the TQT sample showed morphology with less porosity on the surface. The DQT sample showed solid corrosion morphology with little porosity. As the grain size went on decreasing in the cyclic heat-treatments the corrosion rate was also dropped.

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Microstructure evolution and mechanical properties of X12CrMoWVNbN10-1-1 steel during quenching and tempering process

Abstract: Please cite this article in press as: Tao X, et al. Microstructure evolution and mechanical properties of X12CrMoWVNbN10-1-1 steel during quenching and tempering process. J Mater Res Technol. 2015. http://dx.

Cited by 26 publications

References 20 publications

Hot Workability of Ultra-Supercritical Rotor Steel Using a 3-D Processing Map Based on the Dynamic Material Model

Hot Workability of Ultra-Supercritical Rotor Steel Using a 3-D Processing Map Based on the Dynamic Material Model

Experimental analysis of mechanical behaviour and residual stresses of EN-36C alloy steel with and without tempering

Mechanical and corrosion properties of medium carbon low alloy steel after cyclic quenching and tempering heat–treatments

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