Phase structure control in austenite steels during surface  strengthening by high-temperature nitride hardenin

A problem of austenitic steel surface strengthening is considered. There are shown advantages and disadvantages of common low-temperature and high-temperature gas nitride hardening connected with the prevention of chromium nitride formation on the surface of products. The estimate of nitride steel phase structures on the basis of thermo-dynamic models and an experimental definition of parameters for obtaining an austenite surface alloyed with nitrogen are carried out.

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Analysis of ablation process method errors for the definition of the temperature profile of high-temperature gas flows

VESTNIK of the Samara State Aerospace University ◽

10.18287/1998-6629-2013-0-2(40)-61-67 ◽

2014 ◽

pp. 61

Author(s):

S. A. Shustov

Keyword(s):

High Temperature ◽

Temperature Profile ◽

Gas Flows ◽

Ablation Process ◽

Definition Of ◽

High Temperature Gas ◽

Process Method

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Modification of Low-Alloy Steel Surface by High-Temperature Gas Nitriding Plus Tempering

Journal of Materials Engineering and Performance ◽

10.1007/s11665-018-3141-0 ◽

2018 ◽

Vol 27 (2) ◽

pp. 361-367 ◽

Cited By ~ 2

Author(s):

Dongling Jiao ◽

Minsong Li ◽

Hongzhen Ding ◽

Wanqi Qiu ◽

Chengping Luo

Keyword(s):

High Temperature ◽

Alloy Steel ◽

Steel Surface ◽

Low Alloy Steel ◽

Gas Nitriding ◽

High Temperature Gas

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An Environmental Wet Cell For High Voltage Electron Microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100070539 ◽

1973 ◽

Vol 31 ◽

pp. 18-19

Author(s):

N.J. Tighe ◽

H.M. Flower ◽

P.R. Swann

Keyword(s):

Electron Microscopy ◽

High Temperature ◽

Image Quality ◽

Inelastic Scattering ◽

High Voltage ◽

High Voltage Electron Microscopy ◽

Voltage Electron ◽

Environmental Cell ◽

Water Saturated ◽

High Temperature Gas

A differentially pumped environmental cell has been developed for use in the AEI EM7 million volt microscope. In the initial version the column of gas traversed by the beam was 5.5mm. This permited inclusion of a tilting hot stage in the cell for investigating high temperature gas-specimen reactions. In order to examine specimens in the wet state it was found that a pressure of approximately 400 torr of water saturated helium was needed around the specimen to prevent dehydration. Inelastic scattering by the water resulted in a sharp loss of image quality. Therefore a modified cell with an ‘airgap’ of only 1.5mm has been constructed. The shorter electron path through the gas permits examination of specimens at the necessary pressure of moist helium; the specimen can still be tilted about the side entry rod axis by ±7°C to obtain stereopairs.

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