| Effect of Rare Earth Elements on Thermal Fatigue Property of Low Chromium Semi-Steel |
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| 作者姓名： | 常立民 刘建华 张瑞军 邵利 于升学 谌岩 |
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| 作者单位： | [1]AnalysisandMeasureCenter,SipingNormalCollege,Siping136000,China [2]CollegeofMaterialScience＆ChemicalEngineering,YanshanUniversity,Qinhuangdao066004,China [3]HebeiProvinceKeyLaboratoryofMetastableMaterialsScienceandTechnology,Qinhuangdao066004,China [4]Dean‘sOffice,HebeiNormalCollege,Shijiazhuang050012,China |
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| 基金项目： | ProjectsupportedbytheScienceandTechnologyGuidingProject (9412 2 12 3 )ofHebeiProvince |
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| 摘 要： | The effect of rare earth elements on eutectic carbide‘s morphology of low chromium semi-steel in as-cast state and after heat treatment was investigated, and accordingly, the thermal fatigue property of this material was studied. The results show that RE can improve the eutectic carbide‘s morphology, inhibit the formation and propagation of thermal fatigue cracks, therefore, promote the thermal fatigue property, which is more noticeable in case of the RE modification in combination with heat treatment. The optimal thermal fatigue property can be obtained when treated with 0.2% RE modification as well as normalization at 950℃ for 3h.
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| 关 键 词： | 低铬半钢 稀土 热疲劳性能 化学成分 热处理 |
Effect of Rare Earth Elements on Thermal Fatigue Property of Low Chromium Semi-Steel |
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| Abstract: | The effect of rare earth elements on eutectic carbide′s morphology of low chromium semi-steel in as-cast state and after heat treatment was investigated, and accordingly, the thermal fatigue property of this material was studied. The results show that RE can improve the eutectic carbide′s morphology, inhibit the formation and propagation of thermal fatigue cracks, therefore, promote the thermal fatigue property, which is more noticeable in case of the RE modification in combination with heat treatment. The optimal thermal fatigue property can be obtained when treated with 0.2% RE modification as well as normalization at 950 ℃ for 3 h. |
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| Keywords: | metal materials low chromium semi steel thermal fatigue property rare earths |
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