Failure of radiant tubes during operation in an endothermic atmosphere

1980 ◽  
Vol 22 (9) ◽  
pp. 661-664 ◽  
Author(s):  
B. S. Starokozhev ◽  
S. A. Yurasov ◽  
I. A. Chernov ◽  
A. N. Prudnikov ◽  
G. A. Slisarenko ◽  
...  
Keyword(s):  
Endothermic Atmosphere

Low-temperature gas carburizing of austenitic X5CrNi18-10 steel activated with a thin iron coating

2018 ◽  
Vol 23 (1) ◽  
pp. 50-60
Author(s):  
Tadeusz Żółciak ◽  
Andrzej Przywóski
Keyword(s):  
Low Temperature ◽  
Steel Surface ◽  
Surface Hardness ◽  
Alternative Activation ◽  
Diffusion Annealing ◽  
Short Term ◽  
Gas Carburizing ◽  
Endothermic Atmosphere ◽  
Iron Coating ◽  
Carburized Layer

The study investigated the effectiveness of X5CrNi18-10 stainless steel activation by means of a thin iron coating for low temperature carburizing and the usefulness of the generator endothermic atmosphere for this process. In order to activate the steel surface an iron coating with a thickness of 1–2 µm was applied on it electrolytically electroless. Carburizing was carried out at the temperatures of 450–500oC in the atmospheres based on the generator endothermic atmosphere with the addition of nitrogen or hydrogen. Coating modification by adding a few per cent of sulphur to iron resulted in a reduction of the dispersion of hardness on the surface, and the appearing soot showed a loose connection with the coating. Alternative activation by means of the short-term oxy-nitriding and the following diffusion annealing promoted an increase of hardness on the surface and a reduction of its dispersion after carburizing. After carburizing in endogas of X5CrNi18-10 steel at 470oC during 30 h, a carburized layer with a thickness of approx. 35 μm and the surface hardness of approx. 1150 HV0,05 were obtained. Lowering the carburizing temperature by 20oC resulted in a decrease of the layer thickness by 20% after 24 hours of carburizing. The changes in the thickness of the layer carburized in endogas and the hardness on the surface since the carburization were determined.

Nitriding of steel parts for machine construction in an endothermic atmosphere

1982 ◽  
Vol 24 (4) ◽  
pp. 270-273
Author(s):  
A. N. Utkina ◽  
Yu. Yu. Cherkis ◽  
M. N. Kozlova ◽  
V. L. Kozlov
Keyword(s):  
Machine Construction ◽  
Endothermic Atmosphere

scholarly journals Simulation modeling of the automated endothermic atmosphere quality management system for chemical and terminological processing of metals

2020 ◽  
pp. 81-84
Author(s):  
Vladimir Konstantinovich Gryzhov ◽  
Vladimir Sergeevich Grebenshchikov ◽  
Alena Alekssevna Kovalenko ◽  
Phedor Mikhailovich Skudar
Keyword(s):  
Quality Management ◽  
Thermal Treatment ◽  
Simulation Model ◽  
Control Systems ◽  
Simulation Modeling ◽  
Quality Management System ◽  
Automated System ◽  
Automated Control ◽  
Endothermic Atmosphere ◽  
Algorithm Implementation

In the article the simulation model of the automated system of quality management of endothermic atmosphere for chemical and thermal treatment of metals is developed. A step-by-step description of the algorithm implementation is given and an example of the proposed method application is given. The results of the development can be used in the design of automated control systems.

Carburizing of heat resistant steels in a controlled endothermic atmosphere

1971 ◽  
Vol 13 (8) ◽  
pp. 650-654 ◽  
Author(s):  
E. L. Gyulikhandanov ◽  
V. G. Khoroshailov
Keyword(s):  
Heat Resistant ◽  
Endothermic Atmosphere ◽  
Heat Resistant Steels

Bright quenching after heating in an endothermic atmosphere

1964 ◽  
Vol 6 (9) ◽  
pp. 555-558
Author(s):  
N. P. Petrov ◽  
I. T. Troshkin ◽  
A. P. Filippov
Keyword(s):  
Endothermic Atmosphere
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