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时间:2020-04-30
《Fe基电弧喷涂层磨损及腐蚀行为.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第39卷第10期北京工业大学学报V01.39NO.102013年10月JOURNALOFBEIJINGUNIVERSITYOFTECHNOLOGY0ct.2013Fe基电弧喷涂层磨损及腐蚀行为李冉,周正,贺定勇,宋晓艳,赵秋颖(1.北京工业大学材料科学与工程学院,北京100124;2.北京工业大学机械工程博士后流动站,北京100124)摘要:设计开发了Fe.Cr.P.B.C系粉芯丝材,采用双丝电弧喷涂方法在Q235基体表面制备相应涂层,并利用x射线衍射(x—raydiffraction,XRD)、扫描电子显微镜(scanningelectronmicroscope,SEM)、磨粒磨损试验机和电
2、化学工作站,研究添加P元素对涂层微观组织结构、磨损和腐蚀行为的影响规律.结果表明:涂层由变形良好的扁平化粒子相互搭接堆积而成,孔隙率为3%~4%.所制备的涂层均具有非晶/纳米晶复合相结构特征,但引入P元素部分替代合金系中B元素后导致涂层的非晶相质量分数有所降低.随着添加的(P)的提高,涂层显微硬度及耐磨性有所下降,但影响并不显著,涂层相对耐磨性依然保持在基材的5~8倍.而添加P元素后,涂层自腐蚀电位显著提高,有利于其耐蚀性能.在所研究范围内,添加2%P元素时涂层具有相对较为优异的耐蚀、耐磨综合性能.关键词:铁基涂层;微观组织结构;磨损行为;腐蚀行为中图分类号:TG174.4文献标志码:A文章编
3、号:0254—0037(2013)1O一1576—05WearandCorrosionBehaviorofWire--arcSprayedFe--basedCoatingsLIRan,ZHOUZheng,HEDing—yong,SONGXiao.yan,ZHAOQiu—ying(1.CollegeofMaterialsScienceandEngineering,BeijingUniversityofTechnology,Beijing100124,China;2.PostdoctoralResearchStationofMechanicalEngineering,BeijingUniversi
4、tyofTechnology,Beijing100124,China)Abstract:CoredwiresFe-Cr-P—B·Csystemwasdesigned,andcoatingswerepreparedbytwinwirearcsprayingonQ235substrate.Theinfluencelawonmicrostructure,wearresistanceandelectrochemicalcorrosionresistanceofcoatingswithphosphoruswereinvestigatedbyX—raydiffraction(XRD),scanningel
5、ectronmicroscope(SEM),abrasiveweartestingmachine,andelectrochemicalworkstation.Resultsshowedthattheas—depositedcoatingsconsistedofnumerousflattenedlamellaeparalleltothesubstrate.Theporositiesofcoatingswereabout3%一4%.Thecoatingswereamorphous/nanocrystallinecompositecoatings.However,thepartialsubstitu
6、tionPforBinthealloysystemresultedinthereductionofamorphouscontent.Themicrohardnessandwearresistancedecreasedslightlywiththeincreaseof(P),butnotnotable.Theabrasivewearresistanceofcoatingswas5—8timeshigherthanthatoftheQ235substrate.Thefreecorrosionpotentialincreasedafteraddingthephosphoruselementintot
7、hecoatings,whichwasbeneficialtocorrosionresistanceofcoatings.Inthisstudy.thecoatingwith2%phosphorusadditionhadcomparativelybetterwearandcorrosionresistance.Keywords:Fe—basedcoating;microstructure;wear
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