What are the effects of a carburizing flame on steel?

A carburizing flame will produce iron carbide, causing a chemical change in steel and iron. For this reason a carburizing flame is not used on metals that absorb carbon. An oxidizing flame is hotter than a neutral flame and is often used on copper and zinc.

What effect can be caused by an oxidizing flame?

Oxydizing flame. The oxidizing flame is the flame produced with an excessive amount of oxygen. When the amount of oxygen increases, the flame shortens, its color darkens, and it hisses and roars.

Why carburizing flame is called reducing flame?

A reducing flame is a flame with insufficient oxygen. It has a opaque yellow or orange color due to carbon or hydrocarbons which bind with (or reduce) the oxygen contained in the materials the flame processes. The flame is also called carburizing flame, since it tends to introduce carbon soot into the molten metal.

What is the carburizing process?

Carburising is a thermochemical process in which carbon is diffused into the surface of low carbon steels to increase the carbon content to sufficient levels so that the surface will respond to heat treatment and produce a hard, wear-resistant layer.

What is the temperature for carburising flame?

Corrosionpedia Explains Carburizing Flame This type of flame is mostly suitable to weld high carbon steel and other metallic substances which do not absorb carbon. The flame burns at 550°F. Carburizing flames are used for welding and heating operations as well as in welding steel surfaces.

Which metal welding process the carburising flame is used?

A carburizing flame is commonly used for welding high carbon steel and hard facing nonferrous alloys as nickel and Monel.

What is difference between oxidizing flame and carburizing flame?

Carburizing flame is obtained when less oxygen than that is required for stoichiometrically complete combustion is supplied. Oxidizing flame is obtained when excess oxygen than that is required for stoichiometrically complete combustion is supplied.

What is the gas composition of carburizing flame?

The carburizing capacity of the flame increases with de- creasing inputs of oxygen alongwith increasing inputs of acetylene. Thus, with a mixture consisting of 60% acetylene and a low in- put of oxygen (0~3) the entire surface of the rotating sample was carburized, with the torch moving from side to side.

Which metal welding process the Carburising flame is used?

What is carburizing heat treatment process?

Carburizing is a case hardening process in which a metal part or component of low carbon content is heated in a carbon-rich gas atmosphere. The process of heating the metal component in a high carbon environment allows for diffusion of carbon atoms directly into the surface of the part that needs to be case hardened.

What is the difference between a carburizing flame and an oxidizing flame?

Why is Carburising flame used in high carbon steel?

Carburizing hardens the exterior of the metals which has the following advantages: It hardens the exterior of low carbon steel and iron alloys. Carburized metal parts will be able to resist abrasions effectively. Carburized sharp tools will be protected against chipping.

Is blue flame oxidizing or reducing?

This type of flame is produced when there is enough oxygen gas around the burner, but the oxygen content does not exceed the limits of the requirement for oxygen. Therefore, neither oxidation or reduction occurs here. These flames appear in blue colour because there is a good balance of oxygen.