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THEORY

No category Metallurgy Ordinary steels THEORY 

Equilibrium microstructural transformations in steel

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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”

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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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Metallurgy THEORY 

Iron allotropy

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What is allotropy Depending on pressure and temperature, many metals can exist in more than one crystalline form. it

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Macro- and microstructure of steel Metallurgy THEORY 

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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Metallurgy THEORY 

Martensite and retained austenite

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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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Metallurgy THEORY 

Martensitic transformation in steel: beginning and the end

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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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THEORY Heat treatment 

Hardenability of steels: alloying effect

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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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Metallurgy THEORY 

Isothermal transformation of austenite

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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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Metallurgy THEORY 

Cementite and ferrite in pearlitic steels

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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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Metallurgy THEORY 

High carbon steels in the phase diagram

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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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