摘要
通过热力学计算、光学显微镜、扫描电子显微镜和透射电子显微镜观测及微观成分分析证明：ＲＥ（Ｃｅ）可加剧奥氏体中锰钢凝固时的成分过冷现象，促进树枝晶的发展、熔断、游离和增殖，提高结晶形核率，有效地细化奥氏体晶粒；Ｔｉ和Ｃ可以直接在液相中反应形成ＴｉＣ，并可作为渗碳体的结晶核心，使一次渗碳体和共晶渗碳体发生粒化和细化，从而避免连续网状碳化物的形成。
By means of thermodynamic calculation, optical microscope, scanning electron microscope, transmission electron microscope and microcomposition detection, the modifying effect of RE and Ti on austenitic medium manganese steel was investigated. The results show that RE(Ce) improves constitutional supercooling of austenitic medium manganese steel during solidification and also promotes growth, melting down, isolating and multiplication of the dendritic grains. The alloying elements Ti and C can form TiC directly in the melt which acts as nucleus of cementite and causes both primary and eutectic cementite granulated and refined. So the cementite network in this steel can be eliminated.
出处
《中国稀土学报》
CAS
CSCD
北大核心
1997年第3期234-238,共5页
Journal of the Chinese Society of Rare Earths
基金
山东省自然科学基金
关键词
钛
变质作用
奥氏体
锰钢
稀土族元素
Rare earths, TiC, Modification, Austenitic medium manganese steel
