leomet 发表于 2009-1-13 21:09:47

金相欣赏---QT

金相欣赏---QT
Induction hardened,
Back polished after etching.

cdzt 发表于 2009-1-13 22:21:58

太漂亮了。台湾的金相照片现在都是彩色的吗？
制作过程复杂吗？如果很实用的话，真想学学！

xcy721626 发表于 2009-2-2 08:47:22

吴老师，腐蚀后抛光有什么特殊手法吗？怎么叫“black polished“，应该有巧妙的方法才能让石墨周围留下晕圈。

leomet 发表于 2009-2-2 09:04:37

回复 3# xcy721626 的帖子

Back polish : light polishing after etching.halos 晕圈 are area with low C% Martensite and were etched deeper, so they are rougher and were not polished during back polish.

xcy721626 发表于 2009-2-2 20:12:48

Thanks for your kindly instruction. I have ever prepared more than thousands metallographic specimen of ductile iron for production examination, but never tried to light polish the etched sample even one time. What a pity!
You make me understood why interesting is so important to achievement.
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