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Kühlt man Austenit jedoch sehr schnell ab ("Abschrecken" des Stahls, um diesen zu härten), so kann sich kein Ferrit bzw. Zementit bilden, da es gar nicht erst zu einer entsprechenden Diffusion des Kohlenstoffs kommt.
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Also dropping below the MS (martensite start) temperature can be problematic. When allowed to cool slowly, the austenite transforms into a mixture of ferrite and cementite. But in a rapid cooling process (i.e. quenching, employed to harden the steel), there is no time for the carbon atoms to diffuse out of the crystalline structure in large enough quantities to form ferrite and cementite, resulting in martensite.
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Also dropping below the MS (martensite start) temperature can be problematic. When allowed to cool slowly, the austenite transforms into a mixture of ferrite and cementite. But in a rapid cooling process (i.e. quenching, employed to harden the steel), there is no time for the carbon atoms to diffuse out of the crystalline structure in large enough quantities to form ferrite and cementite, resulting in martensite.
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Also dropping below the MS (martensite start) temperature can be problematic. When allowed to cool slowly, the austenite transforms into a mixture of ferrite and cementite. But in a rapid cooling process (i.e. quenching, employed to harden the steel), there is no time for the carbon atoms to diffuse out of the crystalline structure in large enough quantities to form ferrite and cementite, resulting in martensite.
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Also dropping below the MS (martensite start) temperature can be problematic. When allowed to cool slowly, the austenite transforms into a mixture of ferrite and cementite. But in a rapid cooling process (i.e. quenching, employed to harden the steel), there is no time for the carbon atoms to diffuse out of the crystalline structure in large enough quantities to form ferrite and cementite, resulting in martensite.
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Also dropping below the MS (martensite start) temperature can be problematic. When allowed to cool slowly, the austenite transforms into a mixture of ferrite and cementite. But in a rapid cooling process (i.e. quenching, employed to harden the steel), there is no time for the carbon atoms to diffuse out of the crystalline structure in large enough quantities to form ferrite and cementite, resulting in martensite.
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Also dropping below the MS (martensite start) temperature can be problematic. When allowed to cool slowly, the austenite transforms into a mixture of ferrite and cementite. But in a rapid cooling process (i.e. quenching, employed to harden the steel), there is no time for the carbon atoms to diffuse out of the crystalline structure in large enough quantities to form ferrite and cementite, resulting in martensite.
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Also dropping below the MS (martensite start) temperature can be problematic. When allowed to cool slowly, the austenite transforms into a mixture of ferrite and cementite. But in a rapid cooling process (i.e. quenching, employed to harden the steel), there is no time for the carbon atoms to diffuse out of the crystalline structure in large enough quantities to form ferrite and cementite, resulting in martensite.
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Also dropping below the MS (martensite start) temperature can be problematic. When allowed to cool slowly, the austenite transforms into a mixture of ferrite and cementite. But in a rapid cooling process (i.e. quenching, employed to harden the steel), there is no time for the carbon atoms to diffuse out of the crystalline structure in large enough quantities to form ferrite and cementite, resulting in martensite.
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Also dropping below the MS (martensite start) temperature can be problematic. When allowed to cool slowly, the austenite transforms into a mixture of ferrite and cementite. But in a rapid cooling process (i.e. quenching, employed to harden the steel), there is no time for the carbon atoms to diffuse out of the crystalline structure in large enough quantities to form ferrite and cementite, resulting in martensite.
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Also dropping below the MS (martensite start) temperature can be problematic. When allowed to cool slowly, the austenite transforms into a mixture of ferrite and cementite. But in a rapid cooling process (i.e. quenching, employed to harden the steel), there is no time for the carbon atoms to diffuse out of the crystalline structure in large enough quantities to form ferrite and cementite, resulting in martensite.
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Also dropping below the MS (martensite start) temperature can be problematic. When allowed to cool slowly, the austenite transforms into a mixture of ferrite and cementite. But in a rapid cooling process (i.e. quenching, employed to harden the steel), there is no time for the carbon atoms to diffuse out of the crystalline structure in large enough quantities to form ferrite and cementite, resulting in martensite.
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