Effect of quenching in a fluidized bed on the structure and mechanical properties of carburized steel 18Kh2N4VA

1972 ◽  
Vol 14 (7) ◽  
pp. 644-645
Author(s):  
L. A. Vasil'ev ◽  
L. A. Sasil'eva
Keyword(s):  
Mechanical Properties ◽  
Fluidized Bed ◽  
Carburized Steel ◽  
Steel 18Kh2n4va

Influence of Fluidized Bed Quenching on the Mechanical Properties and Quality Index of T6 Tempered B319.2-Type Aluminum Alloys

2013 ◽  
Vol 22 (11) ◽  
pp. 3476-3489 ◽  
Author(s):  
Kh. A. Ragab ◽  
A. M. Samuel ◽  
A. M. A. Al-Ahmari ◽  
F. H. Samuel ◽  
H. W. Doty
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloys ◽  
Fluidized Bed ◽  
Quality Index

Control of stoichiometry, microstructure, and mechanical properties in SiC coatings produced by fluidized bed chemical vapor deposition

2008 ◽  
Vol 23 (6) ◽  
pp. 1785-1796 ◽  
Author(s):  
E. López-Honorato ◽  
P.J. Meadows ◽  
J. Tan ◽  
P. Xiao
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Chemical Vapor Deposition ◽  
Young’S Modulus ◽  
Fluidized Bed ◽  
Vapor Deposition ◽  
Young's Modulus ◽  
Chemical Vapor ◽  
Carbide Coatings ◽  
Fuel Particles

Stoichiometric silicon carbide coatings the same as those used in the formation of TRISO (TRistructural ISOtropic) fuel particles were produced by the decomposition of methyltrichlorosilane in hydrogen. Fluidized bed chemical vapor deposition at around 1500 °C, produced SiC with a Young’s modulus of 362 to 399 GPa. In this paper we demonstrate the deposition of stoichiometric silicon carbide coatings with refined microstructure (grain size between 0.4 and 0.8 μm) and enhanced mechanical properties (Young’s modulus of 448 GPa and hardness of 42 GPa) at 1300 °C by the addition of propene. The addition of ethyne, however, had little effect on the deposition of silicon carbide. The effect of deposition temperature and precursor concentration were correlated to changes in the type of molecules participating in the deposition mechanism.

scholarly journals Development of Nanobainitic Microstructures in Carbo-Austempered Cast Steels: Heat Treatment, Microstructure and Properties

Metals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 635
Author(s):  
Oscar Ríos-Diez ◽  
Ricardo Aristizábal-Sierra ◽  
Claudia Serna-Giraldo ◽  
Jose A. Jimenez ◽  
Carlos Garcia-Mateo
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Heat Treatments ◽  
Second Step ◽  
Austenite Formation ◽  
Transformation Kinetics ◽  
Carburized Steel ◽  
Cast Steels ◽  
Final Microstructure ◽  
Kinetics Of

Carburizing implies the existence of a carbon gradient from the surface to the core of the steel, which in turn will affect both the critical temperature for austenite formation and the kinetics of the bainitic transformation during the austempering treatment. Therefore, for future development of carbo-austempered steels with nanobainitic microstructures in the case, it is key to understand the effect of such carbon gradient has on the final microstructure and the mechanical properties reached by the heat treatments used. This work was divided into two parts, firstly two alloys with similar carbon content to those at the surface and center of the carburized steel were used to establish the optimal heat treatment parameters and to study bainite transformation kinetics by high resolution dilatometry. In a second step, a carburized alloy is produced and subjected to the designed heat treatments, in order to evaluate the microstructure and mechanical properties developed. Results thus obtained are compared with those obtained in the same carburized alloy after following the most common quench and temper treatment.

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