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The cooling process in gas quenching Semantic Scholar

Gas quenching is a relatively new process with several important advantages, such as minimal environmental impact, clean products, and ability to control the cooling locally and temporally for best product properties. To meet the high cooling rates required for quenching, the cooling gas must flow at very high velocities, and such flows are highly turbulent and separated. Atomic diffusion of gradient ultrafine structured surface Jul 15, 2013 · OM images of 20CrMnTi steel after quenching and tempering (a); normalized T10 steel (b). Dry sliding friction test was carried out in a laboratory environment on the MM-W1 (China Jinan Assay Group instrument) three-pin-on-disk apparatus.

Carbon Redistribution and Microstructural Evolution Study

Nov 16, 2018 · Microstructure and carbon diffusion in different stages of the two-stage Q-P process:(a) quenching the steel to the first quenching temperature 325 °C; (b) holding the steel at 425 °C for 10 s to achieve incomplete partitioning; (c) quenching the steel to the second quenching temperature 250 °C; (d) conducting another incomplete partitioning at 350 °C for 10 s; (e) quenching the steel to room Comparison of Austenite Decomposition Models During Apr 19, 2014 · The chemical composition of AISI 4140 steel (Table 1) was used in the Kirkaldy model and Li model during the phase transformation calculations. Temperature- and phase-dependent thermo-physical properties of AISI 4140 as used in Reference 3 were used in the FE simulation of water quenching and air cooling of AISI 4140 steel. EP0562250B1 - Process and device for quenching of metal quenching nozzle nozzle array gas cooling Prior art date 1992-03-17 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number EP93101876A Other languages German (de) French (fr)

Effect of carbon on elastic properties and microstructure

May 01, 2019 · Table 2 shows the data used to study Marval X12 steel (Fe-12.8 at.%Cr-8.5 at.%Ni) as well as the steels with increased carbon content. The data is calculated using the CALPHAD method and ab initio method as well as acquired from experiments.Table 3 shows the lattice constants used in the phase-field simulations. The lattice constants of the Marval X12 steel are acquired from experimental Heat Treatment Procedure Qualification for Steel Castings Apr 29, 2004 · @article{osti_840826, title = {Heat Treatment Procedure Qualification for Steel Castings}, author = {Charles, Mariol and Deskevich, Nicholas and Varkey, Vipin and Voigt, Robert and Wollenburg, Angela}, abstractNote = {Heat treatment practices used by steel foundries have been carefully studied as part of comprehensive heat treatment procedure qualification development trials. Materials Free Full-Text Carbon Redistribution and Microstructure and carbon diffusion in different stages of the two-stage Q-P process:(a) quenching the steel to the first quenching temperature 325 °C; (b) holding the steel at 425 °C for 10 s to achieve incomplete partitioning; (c) quenching the steel to the second quenching temperature 250 °C; (d) conducting another incomplete partitioning at 350 °C for 10 s; (e) quenching the steel to room

Materials Free Full-Text Mechanism of the

In this study, vacuum low-pressure carburizing heat treatments were carried out on 18Cr2Ni4WA case-carburized alloy steel. The evolution and phase transformation mechanism of the microstructure of the carburized layer during low-temperature tempering and its effect on the surface hardness were studied. The results showed that the carburized layer of the 18Cr2Ni4WA steel was composed of a large Modeling methods for gas quenching, low-pressure Dec 15, 2018 · During the quenching process of the steel component, both diffusional and martensitic phase transformations can occur simultaneously at different locations of the component. The accuracy of the phase transformation models is very important for the quenching simulation results. NEW ASPECTS of FLUID - WSEASCoefficients of 60Si2Mn Steel during Gas Quenching 133 Jianyun Li, Heming Cheng, Lijun Hou, Zhiliang Li, Jie Hou Surface Heat-transfer Coefficient for T10 Steel during High Pressure Gas Quenching. 147. Lijun Hou, Heming Cheng, Jianyun Li, Ziliang Li Optimal Chemical Composition and Residual Stresses during Quenching of Steel. 245.

Optimum design of the heat-transfer coefficient during gas

In this paper, the mathematical model of phase composition computation was created based on phase transformation kinetics, The phase composition of T10 steel during gas quenching was calculated. Three dimensional numerical analysis of heat transfer Nov 20, 2020 · The numerical simulations of spray quenching were performed to investigate the cooling rate of a 22MnB5 hot steel blank commonly used material in the automotive industry. Experiments are carried out to examine infrared thermograph of hot steel blank surfaces during spray cooling process by using infrared thermal camera. US5452882A - Apparatus for quenching metallic ring-shaped For quenching heated metallic work pieces with a quenching intensity that lies in the region of H values from 0.2 to 4, which is typical for oil or water quenching, a cooling gas is used as the quenching medium in the form of discrete jet streams issuing from a nozzle field and impinging on the work piece surface to be cooled. With limiting of the blower power for the cooling gas serving a

The cooling process in gas quenching Request PDF

In this paper, the mathematical model of phase composition computation was created based on phase transformation kinetics, The phase composition of T10 steel during gas quenching was calculated.