Carburizing is a case-hardening process in which carbon is dissolved in the surface layers of a low-carbon steel part at a temperature sufficient to render the. Gas carburizing is a surface-hardening process that is carried out at a high temperature, usually above °C. Carburizing is essentially the addition of carbon. Specialty Steel Treating is a leading provider of gas carburizing services and has been providing services for over 60 years.

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After selecting the material of interest to you, click on the Heat Treatment link to view data for the selected material. This service is used to increase the wear resistance and fatigue life carburisng components.

Gas Carburizing

We Gss Deal In. Gas Carburising Process is a surface chemistry process, which improves the case depth hardness of a component by diffusing carbon into the surface layer to improve wear and fatigue resistance. Dependent upon the type of hydrocarbon used and the mixture ratio, the typical composition of thecarrier gas is: Total Materia Tips and Tricks 5 th May Methods of correcting the activity coefficient of carbon for alloy content are available.

Total Materia remains the only tool which will be used for this purpose. We are a unique name in the industry to provide our esteemed clients the best quality Gas Carburising Processing Service.

Gas Carburising Process

It is the difference in carbon potential that provides the driving force for carbon transfer to the parts. Definition – What does Gas Carburizing mean? However careful consideration should be given to materials that cxrburising nonuniform or non-symmetric sections. Total Materia has allowed us to solve in a definite way all problems we had for the search of alternate materials in foreign countries.


Since the environment used for heating is oxygen free, the carburizing temperatures can be considerably increased without surface oxidation. Corrosion of Zirconium Alloys: For a particular alloy, the amount of retained austenite in the case increases as the case carbon content increases. A few typical hardening agents include carbon monoxide gas COsodium cyanide and barium carbonateor hardwood charcoal.

Carburizing – Wikipedia

In gas carburizing, the CO is given off by propane or natural gas. Cases formed by liquid carburizing have low nitrogen and high carbon content.

Many of the problems with pack carburizing are eliminated in this process. It is virtually impossible to have a workpiece undergo carburization without having some dimensional changes. The main component in such baths is cyanide.

Carburizing Process and Techniques – Four Methods of Carburizing

Start a conversation with us Contact Us. In addition to the time at the carburizing temperature, several hours may be required to bring large work pieces or heavy loads of smaller parts to operating temperature.

We create a carbon-rich atmosphere in the furnace with the help of gaseous hydrocarbons; methane, butane, and propane are among the most commonly used. During the thermal cycle the components are subject to an enriched carbon atmosphere such that nascent species of carbon can diffuse into ga surface layers of the component.

Introduction to Total Materia Integrator 2 nd April This makes it perfect for high strength and wear applications e. The production of Endothermic gas is usually carried out in an external gas generator. Wikipedia articles with NDL identifiers.

Carburized steels generally have base carbon contents of approximately 0.

Therefore, predictions should be verified by experiments, particularly when an alloy contains substantial amounts of more than one carburissing element.


Both the machinability of steel and its hardness depend on the amount gaw carbon present inside its structure. The provided service is carried out by our skilled team of professionals in the best possible manner. Since K6 is temperature dependent only, it can be seen that the carbon activity can be calculated from the CO and CO2 and since the CO is relatively constant, the CO2 alone can be used.

A carrier gas similar in composition to Endogas produced from methane can be formed from a nitrogen-methanol blend. The process is usually conducted in a sealed quench furnace in which a carburizing gas is introduced. Other variables that affect the amount of carbon transferred to parts include the degree of atmosphere circulation and the alloy content of the parts. Carbon is diffused inwards producing a hardened case by rapid quenching.

In the gas carburising process, a low carbon bearing carrier gas is used, which is enriched with a hydrocarbon gas, such as propane or methane natural gasto increase and control the carbon availability of the atmosphere.

Changing the amount of carbon present transforms the steel so it is more precisely suited to various outcomes.

Alternatively, a nitrogen — Methanol mixture, injected into the furnace can be used to produce a synthetic Endothermic gas. Untreated low-carbon steel wears at a rate too fast to suit the needs of many industrial and transportation applications; standard low-carbon steel simply cannot stand up to the demands of rail, aerospace, and industrial use.

Control of carburisng carburizing is difficult because uniform temperatures may not be maintained.

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