What is the phase of Fe?

What is the phase of Fe?

At atmospheric pressure, three allotropic forms of iron exist: alpha iron (α-Fe), gamma iron (γ-Fe), and delta iron (δ-Fe).

What is Fe fe3c diagram?

The Fe-C phase diagram is a fairly complex one, but we will only consider the steel part of the diagram, up to around 7% carbon. ➢ α-ferrite – solid solution of C in BCC Fe • Stable form of iron at room temperature. The maximum solubility of C is 0.022 wt%. Transforms to FCC γ-austenite at 912 °C.

What is Fe-C phase diagram?

The Fe – C diagram (also called the iron – carbon phase or equilibrium diagram) is a graphic representation of the respective microstructure states of the alloy iron – carbon (Fe-C) depending on temperature and carbon content. To explain this diagram, an introduction about metal structures and pure iron must be done.

What are solid phases in the Fe-Fe3C phase diagram?

Solid phases in the Fe-Fe3C phase diagram: Four solid phases, namely α-Ferrite, Austenite, Cementite (Fe3C), and δ-Ferrite.

What is C Fe?

Cementite (or iron carbide) is a compound of iron and carbon, more precisely an intermediate transition metal carbide with the formula Fe3C. By weight, it is 6.67% carbon and 93.3% iron. It has an orthorhombic crystal structure. The name cementite originated from the research of Floris Osmond and J.

What is iron and carbon?

Carbon steels Carbon steel, composed simply of iron and carbon, accounts for 90% of steel production. Low alloy steel is alloyed with other elements, usually molybdenum, manganese, chromium, or nickel, in amounts of up to 10% by weight to improve the hardenability of thick sections.

What is the range of the Fe-C phase diagram?

The steel portion of the Fe-C phase diagram covers the range between 0 and 2.08 wt. % C. The cast iron portion of the Fe-C phase diagram covers the range between 2.08 and 6.67 wt. % C.

What is Fe-C phase in heat treatment?

In heat treating of steels, the liquid phase is always avoided. The steel portion of the Fe-C phase diagram covers the range between 0 and 2.08 wt. % C. The cast iron portion of the Fe-C phase diagram covers the range between 2.08 and 6.67 wt. % C.

Is the Fe-C equilibrium phase diagram of austenite useful?

The diagram is nevertheless useful since the transformation behaviour of austenite does not change dramatically unless the steel has a large concentration of solutes. Figure 1: Crystal structures of austenite, ferrite and cementite, and the Fe-C equilibrium phase diagram.

What are the uses of alloy phase diagram?

There are four major uses of alloy phase diagrams: Development of new alloys based on application requirements. Production of these alloys. Development and control of appropriate heat treatment procedures to improve the chemical, physical, and mechanical properties of these new alloys.