保温时间对510L带钢氧化层成分、结构和性能的影响
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摘要
使用X衍射分析仪、扫描电子显微镜、电化学工作站和冷弯试验机对590℃保温不同时间的510L大梁钢氧化层成分、结构及性能进行综合分析。热轧样品氧化层物相成分之间的转变大部分发生在保温的初期,之后物相比例变化不明显;保温处理的样品随时间的延长,氧化层厚度增加,共析比例下降,致密性先提高后降低,孔洞数量先减少后增加;保温处理后的样品与处理前相比,耐蚀性能显著提高,黏附力呈现波动变化;当保温时间为40min时,510L大梁钢具有最好的耐蚀性能和黏附力。
The X diffraction analyzer,scanning election microscope,electrochemical workstation and cold bending test machine were used to analysis the composition,structure and properties of 510L oxidation layer holding at 590 ℃ for different holding times.The phase change between the oxides occurs at the early stage of the heat preservation mostly,and then the change of the phase proportion will be no longer obvious.As the extension of time,the thickness of the oxide layer increases,the eutectoid ratio decrease while the density of oxidation layer increase first and then decrease.After the heat treatment,the corrosion resistance improve significantly while the adhesion force fluctuated.The 510 Lhas the best corrosion resistance and adhesion when the holding time is 40 min.
The X diffraction analyzer,scanning election microscope,electrochemical workstation and cold bending test machine were used to analysis the composition,structure and properties of 510L oxidation layer holding at 590 ℃ for different holding times.The phase change between the oxides occurs at the early stage of the heat preservation mostly,and then the change of the phase proportion will be no longer obvious.As the extension of time,the thickness of the oxide layer increases,the eutectoid ratio decrease while the density of oxidation layer increase first and then decrease.After the heat treatment,the corrosion resistance improve significantly while the adhesion force fluctuated.The 510 Lhas the best corrosion resistance and adhesion when the holding time is 40 min.
引文
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[2]黎先浩,康永林,吴光亮.CSP流程薄板坯及热轧板卷氧化皮组织演变[J].钢铁研究学报,2009,21(12):20.
[3]闫博,王雪莲,焦四海.CSP热轧钢板氧化皮与表面粗糙度的研究[J].轧钢,2009,26(1):10.
[4]余伟,王俊,刘涛.热轧钢材氧化及表面质量控制技术的发展及应用[J].轧钢,2017,34(3):1
[5]杨奕,欧阳可居,刘雍,等.氧化铁皮相结构的光电子能谱分析[J].轧钢,2017,34(6):74.
[6]刘靖群,张国臣,唐勤,等.热轧带钢边部翘皮缺陷成因研究及控制措施[J].轧钢,2016,33(6):77.
[7]吴祝民.热轧带钢氧化铁皮的成因及对策[J].轧钢,2007,24(3):56.
[8]吝章国,贾耿伟,李守华,等.卷取温度对510L钢氧化皮结构的影响[J].材料热处理技术,2011,40(24):78.
[9]刘勇.热轧工艺参数对汽车梁用钢表面氧化铁皮结构的影响[J].轧钢,2010,27(2),14.
[10] Chen R Y,Yuen W Y D.Oxide-Scale structures formed on commercial hot-rolled steel strip and their formation mechanisms[J].Oxidation of Metals,2001,56(1/2):111.
[11] Wolf M M.Scale formation and descaling in continuous casting and hot rolling[J].Iron Making and Steel Making,2000,21(1):22.
[12]何爱花,孟洁,王佳,等.表面氧化膜对B510L热轧钢板腐蚀行为的影响[J].中国腐蚀与防护学报,2008,28(4):197.
[13]曹楚南.腐蚀电化学原理[M].北京:化学工业出版社,2004.
[14] Hamadou L,Kadra A,Benbrahim N.Characterization of passivation films formed on low carbon steel in borate buffer solution(PH 9.2)by electrochemical impedance spectroscopy[J].Appl.Surf.Sci.,2005,252(5):1510.
[15] Glass G K,Hassanein A M,Buenfeld N R.Obtaining impedance information on the steel concrete interface[J].Corrosion,1998,54(11):887.