Disscussion about high temperature oxidation behavior of low alloy steel casting slab
FAN Yi1,2��WANG Qing-feng1��YANG Ying2��ZHAO Ya-juan3
��1. College of Materials Science and Engineering�� Yanshan University�� Qinhuangdao 066000�� China 2. Research Institute�� Nanjing Iron and Steel Co.�� Nanjing 210035�� China 3. Technology and Quality Department�� Nanjing Iron and Steel Co.�� Nanjing 210035�� China��
Abstract��The oxidation behavior of low alloy steel casting slabs at 1 000-1 250 �� for two hours was studied by means of SEM/EDS/XRD analysis. The results showed that the oxide scale formed at high temperature exhibited a multi-layer structure�� was mainly composed of Fe3O4 and FeO. When the heating temperature was 1 000 �棬 the oxide scale mainly consisted of the outer layer and the inner layer. With an increase of the heating temperature from 1 050 �� to 1 150 �棬 the middle layer was formed and became thicker and thicker. Meanwhile�� the thickness of the outer layer displayed a sharp increase�� but the inner layer thickness was not significantly increased. The middle layer structure changed from single layer to double layers when the heating temperature was 1 200 �棬 and the oxidation behavior on the surface of matrix changed from homogeneous oxidation to serious grain boundary oxidation. When the heating temperature was increased to 1 250 �棬 the middle layer kept the same�� but the oxidation form on the surface of matrix returned to homogeneous oxidation. Besides�� Ni and Cu were enriched in the inner layer�� while Si was concentrated near the interface.
�ո�����: 2016-12-02
��������: 2017-04-18
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E-mail: fanyi80s@126.com
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�� �棬����壬�� Ӣ�����Ǿ�. �ͺϽ����������������Ϊ̽��[J]. �й������ڿ���, 2017, 35(2): 16-20.
FAN Yi����WANG Qing-feng��YANG Ying��ZHAO Ya-juan. Disscussion about high temperature oxidation behavior of low alloy steel casting slab. Chinese Journal of Iron and Steel, 2017, 35(2): 16-20.
2017, Vol. 35 
