| 稀土和钛对奥氏体中锰钢的变质作用 |
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| 引用本文： | 朱瑞富 张福成. 稀土和钛对奥氏体中锰钢的变质作用[J]. 中国稀土学报, 1997, 15(3): 234-238 |
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| 作者姓名： | 朱瑞富 张福成 |
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| 作者单位： | 山东工业大学材料科学与工程学院，燕山大学材料工程学院 |
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| 摘 要： | 通过热力学计算、光学显微镜、扫描电子显微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，并可作为渗碳休珠结晶核心，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。
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| 关 键 词： | 钛 变质作用 奥氏体 锰钢 稀土族元素 |
Modifing Effect of Rare Earths and Ti on Austenitic Medium Manganese Steel |
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| Abstract: | 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. |
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| Keywords: | Rare earths TiC Modification Austenitic medium manganese steel |
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