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淬火目的就是要獲得Martensite, 出現非Martensite組織(F,P,B 統稱非M)後, 硬度/強度就急遽下降.
above: 100%Martensite; below: M (matrix) + Bainite (red arrows)
Below: yellow arrows: fine Pearlite; red arrow: Bainite. White lines: Ferrite.
Below: Both yellow and red arrows are Pearlite. Color difference is caused by different grain orientations.
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