Iron-carbon phase diagram, showing the iron-carbon phase diagram (near the lower left).

In iron and steel metallurgy, Ledeburite is the eutectic that results when some forms of molten steel solidify. Image File history File links An English version of Diag phase fer carbone. ... Image File history File links An English version of Diag phase fer carbone. ... In physical chemistry and materials science, a phase diagram is a type of graph used to show the equilibrium conditions between the thermodynamically-distinct phases. ... Metallurgy is a domain of materials science and of materials engineering that studies the physical and chemical behavior of metallic elements, their intermetallic compounds, and their mixtures, which are called alloys. ... A eutectic or eutectic mixture is a mixture of two or more elements which has a lower melting point than any of its constituents. ... The old steel cable of a colliery winding tower Steel is an alloy whose major component is iron, with carbon content between 0. ...

It is named after the metallurgist Karl Heinrich Adolf Ledebur (1837-1916). He was the first professor of matellurgy at the Bergakademie Freiberg. He discovered ledeburite in 1882. Metallurgy is a domain of materials science and of materials engineering that studies the physical and chemical behavior of metallic elements and their mixtures, which are called alloys. ... A professor giving a lecture The meaning of the word professor (Latin: one who claims publicly to be an expert) varies. ... The Technische Universität Bergakademie Freiberg (usually translated from German as Freiberg University of Mining and Technology or Freiberg Mining Academy, University of Technology and abbreviated TUBAF) is a small German University of Technology with about 4000 students in the city of Freiberg, Saxony. ...

Ledeburite arises when the carbon content is between 2.06% and 6.67%. The eutectic mixture is 4.3% carbon. Its melting point is 1.147°C. At 4.3% carbon the metal becomes 100% ledeburite. Ledeburite is a phase mixture, of austenite and cementite. Iron-carbon phase diagram, showing the conditions under which austenite (γ) is stable in carbon steel. ... Cementite or iron carbide is a chemical compound with the formula Fe3C, and an orthorhombic crystal structure. ...

Ledeburite has two forms: Ledeburite I and Ledeburite II.

Ledeburite I (close below 1,147 °C) is made of austenite and cementite. Iron-carbon phase diagram, showing the conditions under which austenite (γ) is stable in carbon steel. ... Cementite or iron carbide is a chemical compound with the formula Fe3C, and an orthorhombic crystal structure. ...

Ledeburite II (at ambient temperature) is composed of cementite I with recrystallized secondary cementite (which separates from austenite as the metal cools) and (with slow cooling) of pearlite. The pearlite results from the eutectoidal decay of the austenite that comes from the Ledeburite I at 723°C. During faster cooling, bainite can develop istead of pearlite, and with very fast cooling martensite can develop. Cementite or iron carbide is a chemical compound with the formula Fe3C, and an orthorhombic crystal structure. ... Iron-carbon phase diagram, showing the conditions under which austenite (γ) is stable in carbon steel. ... Eutectoid transformation occurs when a solid solution decomposes into a fixed two solid constituents at a fixed temperature. ... Iron-carbon phase diagram, showing the eutectoid temperature and composition, at which bainite can form. ... Martensite, named after the German metallurgist Adolf Martens, is a class of hard minerals occurring as lathe- or plate-shaped crystals. ...

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