目前分類：熱模鋼 (45)
- Jun 10 Thu 2010 18:19
H13 晶界碳化物 ( 2 )
- Jun 08 Tue 2010 20:03
H13 退火 淬回火 ( 1 ) Annealed, Q/T
- May 29 Sat 2010 20:37
H13 素材晶界碳化物 2
- May 26 Wed 2010 21:19
H13 素材晶界碳化物
- Jan 26 Tue 2010 07:43
難得一見的H13 巨晶
明/暗 視場各一張. Bright / Dark field as a pair for each magnification. Forged and annealed. You see this giant grains only once in a blue moon. Fine pearlite nodules in an island of Bainite inside a giant grain. Abnormal grain growth resulted from 12 passes of reheating to 1150C while trying to forge a chunk of steel into shape . Hardness after quenching was said to be "as usual". But the tooling failed prematurely at about 10 thousand strokes----only 1/3 that of a normal (ASTM No 7 grain size )tool life in that factory.
- Jan 17 Sun 2010 09:31
H13 大鍛件 1.2344
- Oct 07 Wed 2009 22:29
cubic carbide in an H13 part
- Jul 05 Sun 2009 10:03
H13 素材晶界碳化物
- May 25 Mon 2009 08:41
枝晶偏析 2344, SKD 61
- Apr 15 Wed 2009 07:48
SKD 61 枝晶偏析
- Apr 01 Wed 2009 08:19
SKD 61 淬/回 火 Q/T
- Mar 06 Fri 2009 00:20
晶界碳化物 SKD 61 or 2344 素材金相
A
B
枝晶凝固 3-D 示意圖- Feb 17 Tue 2009 22:40
破裂 2344 熱鍛模 金相 (續)
- Feb 12 Thu 2009 08:49
61熱鍛模- 破裂- 金相
- Feb 10 Tue 2009 11:22
破斷面分析 2344熱鍛模
- Oct 11 Sat 2008 22:33
SKD 61 微縮孔缺陷
- May 25 Sun 2008 21:12
氣体氮化 常是熱鍛模破裂的主因
- Feb 16 Sat 2008 09:09
淬火溫度vs.晶粒大小vs. 韌性高低
- Feb 11 Mon 2008 14:08
樹枝晶偏析 SKD 61 (續)
At 10 x 7.5 cm: A=50X, B=100X, C=200X; 顏色較暗處: dendrite arm boundaries or interdendritic space.此處最後凝固, 合金/C% 濃度最高, 故 上頭可看到偏析的碳化物微粒. 稱為"carbide-rich area".
