Behaviour of Rare Earths in Solid Solution in Steel
Behaviour of Rare Earths in Solid Solution in Steel
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DOI：
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发表时间：
2009-10
影响因子：
10.9
通讯作者：
Lin Qin;Ye Wen;Du Yuansheng
中科院分区：
文献类型：
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作者：
Lin Qin;Ye Wen;Du Yuansheng
用电感耦合等离子体（ICP）光谱法测定了16 Mn钢中固溶稀土元素的含量，发现含MnS夹杂物的钢中固溶稀土元素的含量仅为几ppm，随稀土元素含量的增加，固溶稀土元素的含量略有增加，当RE/S = 1.9时，钢中MnS夹杂物完全消失，固溶体中稀土元素的含量随稀土元素含量的增加而迅速增加，室温下铈在16Mn钢（st52）中的固溶度小于0.011wt- %。结果表明，固溶REM使珠光体数量减少，铁素体数量增加，显微硬度提高，不固溶REM可提高临界点温度，减轻带状组织，抑制奥氏体晶粒长大。
The contents of rare earth metals(REM) in solid solution in 16 Mn steel were determined by means of inductive coupling plasma (ICP) spectroscopy.The amount of REM in solid solution is only a few ppm in the steel with MnS inclusions, which rises slightly with the increasing of REM content in steel.At RE/S1.9,the MnS inclu- sions in steel disappear completely,the REM con- tent in solid solution increases rapidly with the in- creasing of REM content.The solubility of cerium in 16 Mn steel(st 52)is less than 0.011 wt—％ at room temperature. The results obtained indicate that REM in sol- id solution reduce the amount of pearlite and in- crease that of ferrite and its microhardness.Dis- solved REM oculd increase temperature of critical points,alleviate band structnre and suppress growth of austenite grains.