45钢中MnS夹杂物的形态分析  

Morphology Analyses of MnS Inclusions in 45 Steel

作　　者：崔志敏[1,2] 朱立光 张庆军 严春亮 曹胜利 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]华北理工大学高品质钢连铸实验室,河北唐山063009 [3]华北理工大学分析测试中心,河北唐山063000

出　　处：《铸造技术》2016年第5期857-859,共3页Foundry Technology

基　　金：河北省自然科学基金资助项目(E2013209207);国家自然科学基金资助项目(51574106)

摘　　要：以45钢为研究对象,利用透射电子显微镜和X射线能谱仪分析了复合夹杂物的结构、位错组态和成分组成。结果表明,夹杂物的主要成分为Al-Ti-O/Mn S;Mn S夹杂以长条状包裹在Al-Ti-O夹杂的外缘;Mn S晶粒内部包含大量的位错和亚晶界。不同夹杂物之间的错配度随温度都有一定的变化,这造成不同夹杂物之间产生错配应力,从而在晶界处激发大量位错,并促使位错向夹杂物外部扩展。The structure, dislocation configuration and composition of complex inclusions in 45 steel were investigated via transmission electron microscopy and energy dispersive spectroscopy. The results show that the complex inclusions consist of Ti-Al-O and Mn S. Mn S grains, which have a long band structure, enwrap the Ti-Al-O. There is a high density of dislocations and sub-boundaries in the Mn S grains. Lattice misfits between different inclusions were calculated and found that they vary with temperature, which lead to mismatch stresses between different inclusions. As a result, dislocations can be initiated and propagate to the outer of complex inclusions.

关 键 词：夹杂物 析出行为 复合析出 位错 

分 类 号：TG142.1[一般工业技术—材料科学与工程]