scholarly journals Design of Experiment Approach in the Industrial Gas Carburizing Process

2018 ◽  
Author(s):  
Muhammad Atiq Ur Rehman ◽  
Muhammad Azeem Munawar ◽  
Qaisar Nawaz ◽  
Muhammad Yousaf Anwar
Keyword(s):  
Design Of Experiment ◽  
Gas Carburizing ◽  
Carburizing Process

Analytical models for the gas carburizing process

1989 ◽  
Vol 20 (4) ◽  
pp. 535-546 ◽  
Author(s):  
C. A. Stickels
Keyword(s):  
Analytical Models ◽  
Gas Carburizing ◽  
Carburizing Process

scholarly journals Controlled Gas Carburizing Process for SCr420 Steel

1988 ◽  
Vol 52 (5) ◽  
pp. 495-501
Author(s):  
Akira Muroga ◽  
Itaru Niimi ◽  
Yoshiki Tsunekawa ◽  
Masahiro Okumiya
Keyword(s):  
Gas Carburizing ◽  
Carburizing Process

scholarly journals Study on Upgradation in Carburizing Technologies for steel strength

2019 ◽  
pp. 78-84
Keyword(s):  
Surface Hardness ◽  
Carbon Diffusion ◽  
Lower Surface ◽  
Diffusion Controlled ◽  
Steel Strength ◽  
Carbon Transfer ◽  
Gas Carburizing ◽  
Kinetics Of ◽  
Plasma Carburizing ◽  
Carburizing Process

Carburizing technologies are used to provide strength on low quality metals. This technology is being developing with novel improvements significantly. The carburizing process consists of, first releasing Carbon mono-oxide from charcoal material and then transfers carbon to raw metal. There are favorable upgradation in these technologies from researchers which have a paramount industrial importance. In Vacuum gas carburizing, the steel metal is carburized with (Acetylene and Propane) gases. These gases are at low pressure and high temperature. The results show that the metal is 1.5 times harder than its raw form. There are also used mathematical models to validate the results. It used gas and solid phases for validation. In pulse carburizing, carbon diffusion on steel is investigated with heat treatment. This process includes several carburizing stages. This process is based on Darken bi velocity and drift velocity. It accounts to demonstrate the kinetics of carbon transfer on steel surface. This design is very useful by regarding carburizing time for this process design. In Plasma carburizing, the mixtures of gases are used to harden the steel. The carburizing temperature was varied in cementite and martensitic. The favorable results show that these specimens have (Lower surface roughness, higher surface hardness and Low wear rate). It is a most novel diffusion controlled novel process till the present time. The carburized metal is used in industry by including (Turbine gears and Air craft engine). Henceforth, It is of great importance to study the carburizing technologies for providing better strength on metal.

Prediction of phase distribution and chemical composition during gas carburizing of stainless steels

2004 ◽  
Vol 120 ◽  
pp. 249-257
Author(s):  
T. Turpin ◽  
J. Dulcy ◽  
M. Gantois
Keyword(s):  
Experimental Study ◽  
Stainless Steel ◽  
Chemical Composition ◽  
Phase Transformations ◽  
Stainless Steels ◽  
Phase Distribution ◽  
Carbon Profile ◽  
Reducing Gas ◽  
Gas Carburizing ◽  
Carburizing Process

This article reports a theoretical and experimental study aiming at reducing gas carburizing experiments on stainless steels. This work was carried out to show the advantages of numerical calculations to simulate phase transformations during the gas carburizing process of high alloyed steels. The use of Thermo-Calc and Dictra software allows the metallurgist to predict the optimum thermochemical and heat treatments which are necessary to obtain an accurate carbon profile in a stainless steel. Moreover, the phase distribution and chemical composition can be followed as a function of time and/or distance to gas-solid interface.

Pulse Carburization of Steel – Model of the Process

2014 ◽  
Vol 354 ◽  
pp. 145-152 ◽  
Author(s):  
M. Zajusz ◽  
K. Tkacz-Śmiech ◽  
K. Dychtoń ◽  
Marek Danielewski
Keyword(s):  
Potential Gradient ◽  
Computer Experiments ◽  
Carbon Diffusion ◽  
Diffusion In Solids ◽  
Treatment Conditions ◽  
Carbon Transfer ◽  
Gas Carburizing ◽  
Kinetics Of ◽  
And Diffusion ◽  
Carburizing Process

Gas carburizing is a widely used heat treatment process in which carbon is transferred into steel. The hardening reliability involves an active control of mass transfer during the process and this is why understanding diffusion in solids is so essential to model the process. The currently used models are often based on the simplest, one-dimensional form of the diffusion equation in which diffusivity depends on composition. The objective of this work is to develop a model of carbon diffusion in multicomponent alloy subjected to pulse carburizing. The model is based on the Darken method (bi-velocity method) in which the diffusion velocity depends on the diffusion potential gradient and is independent of the choice of the reference frame while the drift velocity is common for the carbon and steel components. Our model allows predicting the kinetics of carbon transfer at various treatment conditions and is applied to the pulse carburizing process at constant temperature. The process is carried out by repeating consecutively a carburization stage, when the carburizing gas is supplied into a carburizing chamber, and a diffusion stage at vacuum conditions, when the carburizing gas is exhausted and only the diffusion of carbon takes place. The numerical calculations are made for varying carburization and diffusion periods and are confirmed by the experimental results. On the basis of the series of computer experiments some findings that are important in designing the carburizing technology are formulated.

scholarly journals Mechanical Property Improvement of Steels by the Natural-gas Enrichment Gas Carburizing Process

2002 ◽  
Vol 2002.51 (0) ◽  
pp. 271-272
Author(s):  
Masahiro OKUMIYA ◽  
Yoshiki TSUNEKAWA ◽  
Sinya ICHINOSE ◽  
Kazuhiro KURAHASHI ◽  
Jiro TAKEBE ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Natural Gas ◽  
Gas Carburizing ◽  
Carburizing Process

Carbonitriding Gears

2000 ◽  
pp. 171-173
Keyword(s):  
Alloy Steel ◽  
Room Temperature ◽  
Case Depth ◽  
Gaseous Atmosphere ◽  
Specific Rate ◽  
Carbon And Nitrogen ◽  
Gas Carburizing ◽  
Carburizing Process

Abstract Carbonitriding is a process in which carbon and alloy steel gears are held at a temperature above the transformation range in a gaseous atmosphere of such composition that the steel absorbs carbon and nitrogen simultaneously. The gears are then cooled at a specific rate to room temperature that produces the desired properties. Carbonitriding is generally regarded as a modified gas carburizing process, rather than a form of nitriding. This chapter briefly describes the case depth that can be achieved with carbonitriding, how case depth is measured, and the materials and applications that are suitable for carbonitriding.

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