Research on High-Temperature Oxidation Resistance of Fe-Cr-B-Al Alloy

Author of the article:WANG Gengjie 1 , FAN Jingbo 2 , ZHOU Yucheng 3 , LIU Tongyu 1 , HUANG Zhifu 1

Author's Workplace：1. State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi ’ an Jiaotong University, Xi ’ an 710049, China; 2. Shaanxi Yanchang Coal Yulin Energy and Chemical Co., Ltd., Yulin 718506, China; 3. National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials, School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China

Key Words：Fe-Cr-B-Al alloy; high chromium alloy steel; high temperature oxidation; oxidation mechanism

Abstract：The oxidation behavior of Fe-Cr-B-Al alloy at 900 ℃ was studied by introducing elements B and Al into high
chromium alloy steel to improve its high temperature oxidation resistance. The results show that the oxidation weight gain
of Fe-Cr-B-Al alloy is much lower than that of high chromium alloy steel. The reason is that the outer layer of oxidation
products of Fe-Cr-B-Al alloy is dense Al 2 O 3 , which can effectively block the inward diffusion of oxygen element. The inner
layer is FeCr 2 O 4 , and the composite oxide film formed with Al 2 O 3 can weaken the electron flow, so that the Fe-Cr-B-Al
alloy has more excellent oxidation resistance at high temperature.