310不銹鋼的高溫循環氧化行為研究

High Temperature Cyclic Oxidation Behavior of 310 Stainless Steel

馬祥宸(Hsiang-Cheng Ma) ； 蔡文達(Wen-Ta Tsai) ； 張君華(Jun-Hua Chang)

《防蝕工程》 31卷4期 (2017/12) Pp. 1-7

https://doi.org/10.6376/JCCE.201712_31(4).0001

摘要

本研究探討310不銹鋼在800-1100°C溫度範圍的高溫氧化及在反覆循環升降溫條件下熱循環氧化性質。氧化試驗是在管型高溫爐中進行，量測在不同溫度與持溫時間下的氧化增重，以了解氧化速率的變化。高溫試驗後的試片，以SEM及EDS觀察腐蝕後表面及橫截面的影像、微觀組織與腐蝕產物的化學成分。實驗結果顯示，310不銹鋼呈現拋物線擴散機制的氧化行為，氧化速率隨著持溫時間增加而降低。氧化腐蝕後的表面形貌隨著溫度及持溫時間不同而有所改變：橫截面的影像及分析結果顯示氧化層外層由Cr_2O_3所組成，在氧化層與基材交接處及基材內部有SiO_2的內氧化情形發生。在1000°C下10個週期的循環氧化試驗結果顯示氧化銹皮的附著性良好。

關鍵字

AISI 310不銹鋼 ； 高溫氧化 ； 循環氧化

並列摘要

In this study, high temperature oxidation and cyclic oxidation behaviors of 310 stainless steel (SS) in the temperature range of 800 - 1100 °C were explored. High temperature oxidation tests were conducted in a tube furnace. The weight gains were measured at different time interval and at specific temperatures with various heating conditions. Post SEM/EDS examinations were also performed for surface morphology, cross-section microstructure and chemical composition analyses. The experimental results showed that 310 SS exhibits a diffusion-controlled parabolic oxidation mechanism, while the oxidation rate decreases with increasing holding time. A significant change in scale surface morphology associated with different types of oxide formation was observed. The cross-section SEM images reveal that the scales mainly exhibit a single Cr-rich oxide layer at the temperature range studied. Internal oxidation with the formation of SiO_2 was also observed. Satisfactory adhesion of the scale to the substrate was found for cyclic oxidation at 1000 °C.

並列關鍵字

AISI 310 Stainless Steel ； High Temperature Oxidation ； Cyclic Oxidation