What is Cementite?

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Cementite and Iron Carbid are compounds of iron, carbon, or, more precisely, an intermediate metal carbide having the molecular structure Fe3C. It weighs 6.67% and 9.3% respectively. It is a gray-white crystal powder, with a relative density of 7.694. It can dissolve in water or dilute acid. Do not react with dry atmosphere. Iron oxide and carbon can be formed by oxidizing in moist oxygen. It is characterized by an orthorhombic crystal form. It is hard, fragile, and often classified as ceramic. In its purest form it is an essential component of black metalurgisty.

What does Fe3C mean?
Iron carbide Fe3C is also called cementite.

How does cementite form?
Primary cementite:
When the iron-carbon mixture is in equilibrium crystallization, cementite forms. The liquid of hypereutectic alloy (hypereutectic cast iron), is then cooled to below its liquid state.

Eutectic cemented cementite:
Ledeburite structures have a point-strip cementite that is uniformly distributed in the matrix of austenite. This is known as eutectic or eutectic cemite.

The pre-eutectoid and cementite phases of
Alloys of hypoeutectoid-hypereutectoid composition are always precipitated when the temperature drops. This is the case for proeutectoid phases such as proeutectoid iron in hypoeutectoid Steel and proeutectoid cementite, which is hypereutectoid Steel. Because of different conditions for forming, proeutectoid morphology can be broken down into block, Widmanstatten, and reticulate.

Eutectoid cementite:
Eutectoid is the name of cementite that’s found in pearlite.

Secondary cementite
When iron-carbon alloys are slow cooled, such as hypoeutectic iron cast iron, hypoeutectic iron cast iron, or hypereutectic iron cast iron), the carbon content in austenite will reach saturation. The cementite then forms along the austenite grain border with an eutectic and eutectic distribution of microstructure. The secondary cementite, which is precipitated in austenite from the iron-carbon alloy, can be called.

Tertiary cementedite:
If the equilibrium cooling rate of iron in industry is lower than the line PQ of carbon-in-iron (FeC equilibrium diagram), then the solubility and temperature in the ferrite reach saturation. Then the temperature falls again. Due to its low quantity, the tertiary cemite is precipitated from the ferrite grain boundary. It generally occurs intermittently along that boundary.

Free Cementite:
These are those which exist outside of the mechanical mixture, like pearlite (eutectic structural) or ledeburite.

Iron Carbide Fe3C Powder Price
Price is affected by many things, such as the demand and supply in the market and industry trends. Economic activity and market sentiment are also important.
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Iron Carbide Fe3C Powder Supplier
Buffalotours Nano Technology Co. Ltd. (Buffalotours), is a global trusted supplier and manufacturer of high-quality chemical materials. This includes silicon powder. Graphite powder. Zinc sulfide. Calcium nitride. 3D printing powder.
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