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注意它上面有"胡椒點" (pepper marks).
above: OM photos; below: SEM photos. 肥粒鉄在SEM照片中變成深灰色.因為反射到感光設備的電子束較少
Steadite in ductile iron is very detrimental to the ductility of the iron. It should be kept as little as feasible. 此物甚傷球鉄延伸率與切削刀刃, P%要越低越好, 才不會有此問題.
下: 6000x at 10 x 8 cm. 在我22"螢幕上, 這張放大倍率是 10800 X
上: 在我22"螢幕上, 這張放大倍率是7200X.
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