Equilibrium microstructural transformations in steel
Privates Steel Despite, that a large number of complex alloy steels have been developed and used in the world, common steels (become ordinary
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THEORY
System “iron-carbon”
Cast iron and steel are more than 80 % weights of all metals used. Most carbon steels contain up to 1,5 % carbon, then
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Iron allotropy
What is allotropy Depending on pressure and temperature, many metals can exist in more than one crystalline form. it
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Bainite in steel
If the steel is cooled from the austenitizing temperature slightly faster, than just outside, then there is a possibility of the formation of such a microstructure of steel as
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Martensite and retained austenite
The temperature of the onset of martensitic transformation in steels is highly dependent on the carbon content of austenite. Martensitic transformation and carbon content In the figure
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Martensitic transformation in steel: beginning and the end
There are two very important temperatures when quenching steel - the temperature of the beginning of the martensitic transformation Mn and the temperature of the end of the martensitic transformation Mk.
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Hardenability of steels: alloying effect
Known, that the active alloying elements of steel, such as chromium and molybdenum, form carbides in it. It means, that these items
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Isothermal transformation of austenite
In the 1920s, the American Edgar Bain first applied the so-called isothermal transformation method to study the structure of steel.. "Isothermal"", understandably, means
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Cementite and ferrite in pearlitic steels
Carbon steels 0,77 % form a unique microstructure, which is called "perlite". Such steels are called eutectoid steels.. Cm. also hypoeutectoid
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High carbon steels in the phase diagram
High carbon steels In high carbon steels, the amount of carbon, dissolved in austenite, increases, and the iron atoms move apart in relation to each other.
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