A D2 tool steel ingot slightly forged sold to tool makers by a Mr. Smart who thought he could make much more profit than selling a steel that was sufficiently forged. It looks like an act of cheating.
- Mar 28 Fri 2008 20:49
Very bad SKD 11
- Mar 27 Thu 2008 09:01
FC 鑄鐵的共晶胞 Eutectic Cells of grey iron
較亮的網目線為最後凝固處, 雜質元素 磷(P)積聚在此, 故史帝田鐵出現在"胞界". 接種的目的在增加共晶胞數目, 共晶胞數目多, 胞界總長度就長, 合金/雜質元素被胞界平均分攤後, 就變得很低, 產生白口的機率就大幅降低. 另外, 胞內的石墨片(=微裂縫)也較細小, 抗拉強度因而較高.
50x- Mar 27 Thu 2008 08:36
黃同學金相試作 FC 200
拋光
下: 右側為衝床切邊 故有塑性流動痕跡. 鍍了銅- Mar 18 Tue 2008 09:26
FCD 失敗例 Failed in Nodulization Treatment
球化劑沒有蓋好 導致铁水未滿盆 球化劑就"爆發"了. Nodulizer was not carefully covered and resulted in this failure: insufficient inoculation.
- Mar 16 Sun 2008 14:38
SKH 9 鋸條金相
- Feb 26 Tue 2008 22:36
碳化物微粒 常常是裂源
- Feb 19 Tue 2008 22:24
Ti% - D型石墨 - 熱裂
- Feb 17 Sun 2008 21:06
冷卻曲線 cooling curve
