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发表于 2015-11-1 16:37:26
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本帖最后由 leomet 于 2015-11-2 20:17 编辑
I am in English mode now.
ADI is Austempered Ductile Iron
white arrows: Lower B + R.A.; obtained by Austempering.
red arrows: high C% M + R.A. obtained by induction hardened area,
yellow arrows: interdendritic areas, rich in alloy elements.
Therefore, micro-voids and carbide present, and M and R.A. abound.
R.A. is highly reflective, and that is why these areas appear "white".
photo iq3 is taken from this area.
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