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The exothermic-endothermic gas generator
Springer Science and Business Media LLC - Tập 4 - Trang 338-351 - 1986
C. A. Stickels
Exothermic-endothermic gas generators produce atmosphere gas for furnace heat treatment by the reaction of exothermic gas and natural gas in a retort which is heated by the combustion reaction which forms the exothermic gas. Because the exothermic gas can vary in composition, depending on the air/natural gas combustion ratio and the cooling water temperature, the carbon potential of the product ga...... hiện toàn bộ
High cycle fatigue resistance of AISI E9310 carburized steel with two different levels of surface retained austenite and surface residual stress
Springer Science and Business Media LLC - Tập 2 - Trang 54-61 - 1981
M. A. Panhans, R. A. Fournelle
The high cycle fatigue resistance of carburized AISI E9310 steel has been investigated for two different levels of surface retained austenite and surface residual stress. Fatigue specimens were carburized to a case depth of 1.9 mm with a surface carbon content of 1.0 wt pct carbon. This treatment gave surface retained austenite and surface residual stress levels of 56 vol pct and -595 MPa (-86 ksi...... hiện toàn bộ
Residual stress and microstructure in quenched and tempered and hot oil quenched carburized gears
Springer Science and Business Media LLC - Tập 1 - Trang 29-36 - 1980
Michael M. Shea
The residual stress and microstructure in carburized cases developed by a conventional quench and temper and a hot oil quench were determined for two automotive differential gears. A Ithough the results for the two gears could not be directly compared because of the different geometries, the changes in residual stress produced by hot oil quenching was found to depend on the hardenability of the st...... hiện toàn bộ
X-ray method of measuring retained austenite in heat treated white cast irons
Springer Science and Business Media LLC - Tập 1 - Trang 43-51 - 1979
Chongmin Kim
An X-ray technique for measuring the amount of retained austenite in textured alloys has been successfully applied to white cast irons. The technique involves rotating and tilting the sample about the incident X-ray beam such that every grain on the sample surface, no matter what its orientation, contributes to the diffraction intensity. The theoretical relationship between the amount of retained ...... hiện toàn bộ
Prevention of decarburization in Annealing of high carbon steel
Springer Science and Business Media LLC - Tập 2 - Trang 225-231 - 1982
F. E. Purkert
High carbon steel products must frequently be annealed without decarburization. At annealing temperatures, CO2 and H2O readily react with carbon in the steel to form CO and H2. Hydrogen itself can cause decarb, forming methane. Depending on temperature, the carbon in the steel can be present as cementite or as solute in the α- and γ-iron phase. Each of the forms requires different atmosphere consi...... hiện toàn bộ
Effects of heat treatment on the mechanical properties and microstructures of four different heats of a precipitation hardening HSLA steel
Springer Science and Business Media LLC - Tập 5 - Trang 7-19 - 1987
G. E. Hicho, C. H. Brady, L. C. Smith, R. J. Fields
ASTM A710 is a high strength low alloy (HSLA) steel whose strength is a result of both a fine-grained microstructure and a dispersion of copper precipitates. For these reasons, the tensile and impact properties of an A710 plate depend both on the thermomechanical history of each plate and on its chemistry. Since plates shipped from steel suppliers are frequently heat treated under different condit...... hiện toàn bộ
Influence of Vanadium on the Hardenability of a Carburizing Steel
Springer Science and Business Media LLC - Tập 8 - Trang 93-99 - 1990
Stephen Preston
The case and core hardenability of a lean alloyed carburizing steel containing microalloying additions of vanadium, molybdenum, and titanium have been determined. For comparison purposes a standard SS2506 carburizing steel grade was selected and the results have shown similar core hardenability for the two steel types. However, at section sizes above -25 mm the standard grade was found to exhibit ...... hiện toàn bộ
Theoretical and experimental study of stationary and progressive induction hardening
Springer Science and Business Media LLC - Tập 4 - Trang 145-166 - 1985
Mikael Melander
Theoretical models for stationary and progressive induction hardening are proposed and briefly described. The models, which are valid for cylindrical geometries, have been used for calculation of the power input into the workpiece, temperature fields, phase transformations during heating and cooling, hardness patterns, stress distributions, and the relationships among these different quantities. T...... hiện toàn bộ
Calendar …
Springer Science and Business Media LLC - Tập 9 Số 2 - Trang 71-72 - 1992
Atmosphere carburizing at 927° C (1700° F) for distortion control
Springer Science and Business Media LLC - Tập 8 - Trang 21-26 - 1990
Gregory A. Fuller
A reduction in the magnitude of out-of-round (OOR) and improved flatness of heat treated but unfinished tapered roller bearing components was achieved by carburizing parts at temperatures less than 927°C (1700°F) in a controlled, integral-quench process. Distortion results from this study are compared to conventionally processed components. Reasons for reduced distortion levels achieved are discus...... hiện toàn bộ
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