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  2. Bainite - Wikipedia

    en.wikipedia.org/wiki/Bainite

    Bainite is a plate-like microstructure that forms in steels at temperatures of 125–550 °C (depending on alloy content). [1] First described by E. S. Davenport and Edgar Bain, [2] [3] it is one of the products that may form when austenite (the face-centered cubic crystal structure of iron) is cooled past a temperature where it is no longer thermodynamically stable with respect to ferrite ...

  3. Carbon steel - Wikipedia

    en.wikipedia.org/wiki/Carbon_steel

    High carbon steel has many uses such as milling machines, cutting tools (such as chisels) and high strength wires. These applications require a much finer microstructure, which improves toughness. These applications require a much finer microstructure, which improves toughness.

  4. Austenite - Wikipedia

    en.wikipedia.org/wiki/Austenite

    Iron-carbon phase diagram, showing the conditions under which austenite (γ) is stable in carbon steel. Allotropes of iron; alpha iron and gamma iron. Austenite, also known as gamma-phase iron (γ-Fe), is a metallic, non-magnetic allotrope of iron or a solid solution of iron with an alloying element. [1]

  5. Pearlite - Wikipedia

    en.wikipedia.org/wiki/Pearlite

    The carbon diffusion during the formation of pearlite, just ahead of the growth front, is critical in determining the thickness of the lamellae and, consequently, the strength of the steel [5]. Bainite is a similar structure with lamellae much smaller than the wavelength of visible light and thus lacks this pearlescent appearance.

  6. Martensite - Wikipedia

    en.wikipedia.org/wiki/Martensite

    For a eutectoid steel (0.76% C), between 6 and 10% of austenite, called retained austenite, will remain. The percentage of retained austenite increases from insignificant for less than 0.6% C steel, to 13% retained austenite at 0.95% C and 30–47% retained austenite for a 1.4% carbon steel. A very rapid quench is essential to create martensite.

  7. Austempering - Wikipedia

    en.wikipedia.org/wiki/Austempering

    Austempering is heat treatment that is applied to ferrous metals, most notably steel and ductile iron. In steel it produces a bainite microstructure whereas in cast irons it produces a structure of acicular ferrite and high carbon, stabilized austenite known as ausferrite. It is primarily used to improve mechanical properties or reduce ...

  8. Dual-phase steel - Wikipedia

    en.wikipedia.org/wiki/Dual-phase_steel

    Virtually generated microstructure of dual-phase steel. [1]Dual-phase steel (DP steel) is a high-strength steel that has a ferritic–martensitic microstructure. DP steels are produced from low or medium carbon steels that are quenched from a temperature above A 1 but below A 3 determined from continuous cooling transformation diagram.

  9. Differential heat treatment - Wikipedia

    en.wikipedia.org/wiki/Differential_heat_treatment

    Tempering reduces the hardness in the steel by gradually changing the martensite into a microstructure of various carbides, such as cementite, and softer ferrite (iron), forming a microstructure called "tempered martensite". When tempering high-carbon steel in the blacksmith method, the color provides a general indication of the final hardness ...

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