TBF980钢表面氧化物组成和结构在磷化过程中的变化  

Change of Composition and Structure of Surface Oxides of TBF980 Steel During Phosphating

作　　者：蔡宁 龙袁 郝玉林 姚士聪 CAI Ning;LONG Yuan;HAO Yulin;YAO Shicong(Beijing Key Laboratory of Green Recyclable Process for Iron and Steel Production Technology,Shougang Group Research Institute of Technology,Beijing 100043,China)

机构地区：[1]首钢集团有限公司技术研究院,绿色可循环钢铁流程北京市重点实验室,北京100043

出　　处：《机械工程材料》2024年第3期1-7,共7页Materials For Mechanical Engineering

摘　　要：利用碳萃取复型技术结合扫描电镜、透射电镜、能谱等方法分析了不同时间(0~90 s)磷化处理后TBF980冷轧连退钢表面氧化物的组成、形态及晶体结构变化。结果表明:试验钢表面氧化物主要由薄膜状非晶态SiO_(x)以及MnSiO_(3)单晶颗粒组成。随着磷化时间的延长,表面氧化物数量减少,硅、锰元素含量显著降低,但是当磷化膜完全覆盖试验钢表面时,磷化膜与基体之间仍然存在一层氧化物。在磷化过程中,大部分非晶态SiO_(x)薄膜先断裂再卷成球形,并在磷化液的作用下脱离试验钢表面,小部分保留在磷化膜与基体界面处;MnSiO_(3)单晶在磷化液的作用下先转变成非晶态SiO_(x)与MnSiO_(3)纳米晶的复合颗粒,再完全转变成非晶态SiO_(x)。The composition,morphology and crystal structure change of surface oxides of TBF980 cold rolled continuous annealing steel before and after phosphating for different time intervals(0-90 s)were analyzed by carbon extraction replica technology combined with scanning electron microscope,transmission electron microscope and energy spectrum.The results show that the test steel surface oxides were mainly composed of thin film amorphous SiO_(x)and MnSiO_(3)monocrystalline particles.With the extension of phosphating time interval,the amount of surface oxides decreased,and the content of silicon and manganese decreased significantly.However,when the phosphating film completely covered the surface of the test steel,there was still a layer of oxides between the phosphating film and the substrate.During phosphating,most of the amorphous SiO_(x)film was first broken and then rolled into balls,and separated from the test steel surface under the action of phosphating solution;a small part remained at the interface between the phosphating film and the substrate.Under the action of phosphating solution,the MnSiO_(3)monocrystalline was first transformed into the composite particles of amorphous SiO_(x)and MnSiO_(3)nanocrystalline,and then completely transformed into amorphous SiO_(x).

关 键 词：冷轧连退钢 表面氧化物 碳萃取复型技术 

分 类 号：TG147[一般工业技术—材料科学与工程]