摘要
通过扫描电镜观测、拉曼光谱分析、电化学酸洗模拟等方法,研究了Fe-Si合金钢的氧化铁皮结构和酸洗动力学行为。结果表明,Fe-Si合金钢氧化铁皮-基体分界面上生成的Fe_2SiO_4层能提高Fe-Si合金钢的抗氧化性,使得其氧化铁皮厚度小于DC-03。Fe-Si合金钢的氧化铁皮存在贯穿至基体分界面的原始裂缝,HCl溶液通过原始裂缝渗入基体分界面,导致其酸洗过程跳过＂孕育期＂,直接进入＂加速期＂和＂平稳期＂,使得Fe-Si合金钢的酸洗时间比DC-03短。超声辅助酸洗和酸洗温度的提高,均能提高Fe-Si合金钢酸洗后的表面质量,减少＂红色氧化铁皮＂的残留。
Through the methods such as SEM,Raman spectroscopy and electrochemical pickling simulation,the oxide scale structure and pickling mechanism of Fe-Si alloy had been explored.The results showed that an innermost layer of Fe_2SiO_4 formed at the scale-alloy interface can improve the oxidation resistance of Fe-Si alloy and made the oxide thickness less than DC-03.The oxide of Fe-Si alloy existed throughout the original cracks on the scale-alloy interface,and the HCl solution was penetrated to the scale-alloy interface through the original cracks,which caused that the Fe-Si alloy pickling process skipped the incubation period and went directly to the acceleration period and stable period,resulting in the pickling time of Fe-Si alloy shorter than that of DC-03.Ultrasonic assisted and pickling temperature increasing improved the surface quality of Fe-Si alloy after pickling and reduced the ＂red scale＂ residue.
作者
张赵宁
孔宁
张杰
李洪波
ZHANG Zhao-ning;KONG Ning;ZHANG Jie;LI Hong-bo(School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 10008a,China)
出处
《中国冶金》
CAS
北大核心
2018年第9期28-32,共5页
China Metallurgy
基金
国家自然科学基金资助项目(51605026)
中央高校基本科研业务费专项资金资助项目(FRF-TP-15-082A1)
