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C028 Materials 1WMPP

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Els diagrames mostrats a sota corresponen a diferents tipus de tremp, indica quins dels següents correspon a un tremp martempering: 

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Indica quina afirmació és falsa sobre el ferro:

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Quina estructura cristal·lina té la ferrita (Fe α) a temperatura ambient?
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Quin tipus de recuita transforma la cementita laminar en esferoidal per millorar la maquinabilitat?
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Quina és la relació aproximada de ferrita i cementita en la perlita?

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La recuita és un tractament tèrmic que millora...:

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Quina estructura cristal·lina té la martensita?
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Quina seria l’estructura del material obtingut segons el refredament que es mostra al diagrama TTT anterior:

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Un acer hipereutectoide a temperatura ambient està format per:

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Quina seria l’estructura del material obtingut segons el refredament que es mostra al diagrama TTT anterior:

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