温度对Super304H合金Cr_2O_3氧化膜开裂影响  

Effect of Temperature on Cracking of Cr_2O_3 Oxide Scale of Super304H Alloy

作　　者：李浩[1,2] 高东强[1] 杨珍[2] 严靖博[2] 刘武[2,3] 朱传志[2,3] 

机构地区：[1]陕西科技大学机电工程学院,西安712000 [2]西安热工研究院有限公司,西安710032 [3]西安理工大学材料科学与工程学院,西安710048

出　　处：《腐蚀科学与防护技术》2017年第6期621-627,共7页Corrosion Science and Protection Technology

基　　金：国家自然科学基金(51301131)~~

摘　　要：合金表面完整致密Cr_2O_3层的形成对其抗氧化腐蚀性能具有重要影响,本文研究发现Super304H合金在620~650℃蒸气条件下温度对其Cr_2O_3膜的保护性具有较显著影响。合金在620℃氧化时,表层Cr_2O_3膜完整覆盖基体,随着时间延长,表面Cr_2O_3出现微裂纹促进瘤状Fe_3O_4形成,当氧化温度达650℃时,Fe_3O_4膜生长率显著提高,最终覆盖合金表面。The formation of an intact and dense Cr2O3 scale on the surface of super304 H alloy has important influence on its oxidation resistance. It has been found that temperature has a significant effect on the stability of the Cr2O3 scale on super 304 H alloy during the steaming process at 620~650 ℃. During oxidation at 620 ℃, the formed Cr2O3 scale covered the matrix completely, while microcracks occurred on the surface of Cr2O3 scale for long term, which facilitated the formation of nodular Fe3O4. When the oxidation temperature reaches 650 ℃, the growth rate of Fe3O4 increased obviously and finally covered the whole alloy surface.

关 键 词：SUPER304H 蒸汽氧化 显微分析 Cr2O3膜破裂 

分 类 号：TG174[金属学及工艺—金属表面处理]