Results 191 to 200 of about 359 (232)

Vacuum carburizing—process optimization

Journal of Materials Processing Technology, 2005
Abstract An increased interest in vacuum carburizing concept is being observed in the last years all around the world as a result of the progress in designing of modern furnaces for thermo-chemical treatment under low pressure and of better knowledge of physico-chemistry of these processes.
Piotr Kula, Robert Pietrasik, Konrad Dybowski   +2 more
exaly   +2 more sources

In Situ Monitoring of Vacuum Carburizing

Materials and Manufacturing Processes, 2009
The present article describes development and testing of a new measurement method that enables nondestructive and in situ monitoring of a vacuum carburizing process. The principle of the method is based on monitoring the carbon diffusion during vacuum carburizing by the in-situ measurement of electrical resistance changes in the carburizing sample ...
A C Kneissl, I Anzel
exaly   +2 more sources

Vacuum Carburization of a Transmission Shaft

AM&P Technical Articles, 2020
Abstract Tests conducted on vacuum carburized and quenched shafts identify variables that increase distortion and the magnitude of residual stresses.
M.A. Delgado-López, R. Colás, V. Esteve   +2 more
openaire   +1 more source

Modeling of vacuum pulse carburizing of steel

Surface and Coatings Technology, 2014
Abstract A review on carburization process modeling is presented and a new model for carbon diffusion in steel subjected to heat treatment by vacuum pulse carburizing is proposed. Such a process is carried out by repeating consecutively a carburizing stage (the boost), when the carburizing gas is supplied into a carburizing chamber, and the diffusion
Marek Zajusz, Marek Danielewski
exaly   +2 more sources

Vacuum carburizing of steel 18KhGT

Metal Science and Heat Treatment, 1977
1. Raising the vacuum carburizing temperature from 960° (standard carburizing temperature for races of steel 18KhGT at State Bearing Factory No. 1) to 1040° accelerates the process by 60%. 2. Vacuum carburizing provides a clean surface and can be used as the final operation.
Yu. P. Usatyi, �. N. Marmer, S. G. Murovannaya, F. A. Palei, L. I. Volkova   +4 more
openaire   +1 more source

On the problems of modernizing equipment for vacuum carburization

Journal of Machinery Manufacture and Reliability, 2017
The article demonstrates the efficiency of vacuum carburization, which combines the rational process environment with advantages of automated process equipment. The equipment offers an opportunity to carry out carburization jointly with dry quenching in a high-pressure nitrogen flow.
R. S. Fakhurtdinov, S. A. Pakhomova, M. Yu. Ryzhova   +2 more
openaire   +1 more source

Characteristic features of carburizing of steel during vacuum carburizing

Metal Science and Heat Treatment, 1979
1. The quantitative relationship obtained between the carbon concentration in the case and the basic parameters of the vacuum carburizing process makes it possible to determine the effective case depth for any ratio of saturation and diffusion times. 2.
openaire   +1 more source

Vacuum carburizing of chromium-nickel steel

Metal Science and Heat Treatment, 2008
The main features of formation of diffusion layers due to vacuum carburizing of chromium-nickel steel 20Kh2N4A in an acetylene medium are considered. Analysis of the structure of the saturated surface and of the results of carburizing is used to show that the diffusion layer is formed under a thin layer of condensed carbon in a kinetic regime the ...
N. M. Ryzhov, A. E. Smirnov, R. S. Fakhurtdinov, A. I. Mordovin   +3 more
openaire   +1 more source

Advances in Carburizing — Vacuum Carburizing

1985
Steel components having appropriate combinations of wear resistance, mechanical strength, impact strength, etc., especially at higher temperatures (above 500°F) can be produced by employing the well-known conventional carburizing process or a suitably modified process.
openaire   +1 more source

The Effect of Over-Carburizing on the Fatigue Strength at Edges of Vacuum-Carburized Samples

Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 2010
The objective of this reseach is to study the effect of over-carburizing on the strength at edges of vacuum-carburized (VC) samples. The relationship between the edge angles and fatigue strength was investigated using developed bending tests in which stress maximized at the top of edges.
Morita, Toshiyuki, Umemoto, Minoru
exaly   +3 more sources