leomet 发表于 2010-6-6 06:53:49

本帖最后由 leomet 于 2010-6-7 06:02 编辑

回复 255# Ronbin

I've long forgotten.   
Please find it out on the Internet.

leomet 发表于 2010-6-6 06:54:56

本帖最后由 leomet 于 2010-6-6 06:56 编辑

回复 252# Ronbin


    敬請指正. 以期能更上一層樓.

雨薇 发表于 2010-6-6 19:26:45

如果好帖子都用英文发，那我等于进入茂密的原始森林了。

xiaoxianglou 发表于 2010-6-9 20:44:42

回复 181# leomet


    interesting

leomet 发表于 2010-7-2 06:49:20

本帖最后由 leomet 于 2010-7-2 06:55 编辑

Photos for you to keep---for good.
Very low carbon steel sheet for forming. 2 mm thick.
Photos without Pearlite (arrowed) are taken from near-surface.
Last photo, dark field.white arrow: grainboundary; yellow arrow:
carbide film.

leomet 发表于 2010-7-3 22:45:51

回复 265# leomet

This very specimen, when over-etched,
looks much like a rock-paved road.
Wouldn't you say so?

leomet 发表于 2010-7-3 22:48:15

回复 266# wangxianzhong


    No.
   Thanks.
   You can find it in this forum.

leomet 发表于 2010-7-4 10:04:25

本帖最后由 leomet 于 2010-7-4 10:07 编辑

ADI color micrographes for your visual delight.

leomet 发表于 2010-7-17 18:28:22

Art works from LeoMet

本帖最后由 leomet 于 2010-10-24 06:40 编辑

Austenitic Manganese Steel. Cast.
Shown in the photos are: interdendritic carbide particles and
"coring" (漸層) of the dendritic arms.

This as-cast specimen was not successfully solution annealed. It stayed
at 1020 C in a salt bath for too short a time (20 min) and then quenched in water.

leomet 发表于 2010-7-17 18:44:13

本帖最后由 leomet 于 2010-7-17 18:49 编辑

Poorly polished and eteched.

leomet 发表于 2010-7-17 18:46:22

本帖最后由 leomet 于 2010-7-17 18:54 编辑

hand file銼刀

Carbide particles dispersed in the matrix or Martensite.

leomet 发表于 2010-7-17 19:06:23

本帖最后由 leomet 于 2010-7-17 19:10 编辑

回复 265# leomet

Grain boundary carbide films in a very low carbon steel sheet.
051 -carbide tinted
088 -Ferrite tinted
others-dark field

sunhua123AC 发表于 2010-7-19 00:31:20

小弟是做钛合金（TI6AL--4V）不知道可有相关的金相图片和分析感激涕零

leomet 发表于 2010-7-19 21:37:54

回复 276# sunhua123AC


No.
Sorry.

kwgmdr 发表于 2010-7-29 19:54:19

回复 50# leomet

感觉淬火温度不够，铁素体都还在，而且出现球状珠光体，可能温度在两相区，有些象球化退火，个人观点，请多指教

leomet 发表于 2010-8-1 13:21:15

本帖最后由 leomet 于 2010-8-1 13:24 编辑

高爐 鉄渣

高爐是把鉄礦砂先做成生鉄的設備. 生鉄CE值很高(~ 5%), 為過共晶成份. 其鉄渣因急冷而成白鑄鉄.
外圍在空氣中脫碳形成一層Ferrite (1), 往內碳素漸高 有Pearlite層(2) 最後是正常的過共晶白鑄鉄(3).

leomet 发表于 2010-8-1 15:35:00

本帖最后由 leomet 于 2010-8-18 06:21 编辑

After color etching
Many hours ofhard work in total to turn out this and #283 above.

kwgmdr 发表于 2010-8-6 15:50:46

回复 167# leomet


请问吴老师，为什么其中一副图上有裂纹而其他的没有？并且裂纹成锯齿状与马氏体平行。

leomet 发表于 2010-8-7 06:36:48

回复 285# kwgmdr


    I see no crack in the photos.

   The zig-zag pattern in the middle of down-right quarter of photo E3
    is tiny Martensite plates formed between two larger plates.

liangmu_j 发表于 2010-8-7 08:26:32

不锈钢固溶前后的那两张对比图太好的，直观的表示出了固溶化
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