纯铝中夹杂物检测方法的对比分析

:20110429;:20110511:(50864002);(0991001):(1983),,.:.Email:[e-mail].32No.8Aug.2011FOUNDRYTECHNOLOGY肖罡1,2,许征兵2,曾建民2(1.,332007;2.,530004):介绍了图像分析法溴甲醇法溶剂冲洗法等3种夹杂物检测方法及原理,并对同1炉次纯铝样品中的夹杂物含量进行对比检测分析结果表明,3种检测方法均能检测出纯铝中夹杂物的含量水平其中,图像分析法简便易行,但夹杂物含量检测结果偏大;溶剂冲洗法虽然检测结果较为准确,但检测值易偏小;溴甲醇法在纯铝夹杂物含量较高时,检测结果较准确,在夹杂物含量较低时,检测结果相对偏差较大,但该检测方法的测量值均易偏小本文实验结果可为制定纯铝中不同夹杂物含量水平的检测标准提供依据:纯铝;夹杂物检测;图像分析法;溴甲醇法;溶剂冲洗法:TG146.2+1:A:10008365(2011)08110504ComparisonStudyontheMethodsofInclusionDetectinginPureAluminumXIAOGang12,XUZhengbing2,ZENGJianmin2(1.DepartmentofMechanicalEngineering,JiujiangVocationalandTechnicalCollege,Jiujiang332007,China;2.KeyLab.ofNonferrousMaterialsandNewProcessingTechnology,GuangxiUniversity,Nanning530004,China)Abstract:Theprinciplesofopticalmicroscope(OM)imageanalysis,brominemethanolandsolventflushingmethodswereinvestigatedinthispaper.Theinclusioncontentofpurealuminumwasinvestigatedandanalyzedcomparativelybyusingthesemethods.Theresultsshowthatallthesethreeproposedapproachescandetecttheinclusioncontentofpurealuminum.Itisalsoindicatedthattheopticalmicroscope(OM)imageanalysisismostconvenient,however,itsevaluationresultsarehigherthantheactualones,whilethatoftheothermethodsarelowerthantheactualones.Thesolventflushingmethodcangetmoreaccurateresults.Undertheconditionofhigherinclusioncontent,theresultsofbrominemethanolmethodaremoreaccurate,whilethereisgreatdeviationinthesituationoflowerinclusioncontent.Itisevidentthattheresultsobtainedinthispaperlaythefoundationfortestingstandardofdifferentinclusioncontentsofpurealuminum.Keywords:Purealuminum;Inclusiondetecting;Opticalmicroscope(OM)imageanalysis;Brominemethanol;Solventflushing,,,,[1~3],,[4],,,,,[4~6],,,3,11105FOUNDRYTECHNOLOGYVol.32No.8Aug.201199.99%,,11w(%)Tab.1Thecompositionsofthetestingsamples1234561008060402000204060801001.1图像分析法,,,[7]1#~6#3,QMWLeicaDMRE1750,100,66=36Ai,108,A,:A=A1+A2+!!A107+A108108(1)1.2溴甲醇法,,,,1∀0.0001g,,100mL8mL,5,50#,,650#0.5h,3gNaOH,750#30mL,100mL10mL,50mL,2%~4%2mL,2,4,1+5NH3H2O,5%10mLpH=4.4,,0.5%4mL,100mL,3h[8]:1.7896g(AlCl36H2O),,1000mL100mL,1000mL,(Al2O3)=10g/mL(Al2O3)=00.20.40.60.81.0g/mL61.3溶剂冲洗法,,,,,,,,[5]45%NaCl,45%KCl,10%NaF,200g,780#,15~20min20g,15min,,22.1图像分析法检测分析11#~6#,,22(%)Tab.2Theresultsofimageanalysisofinclusions(area%)10.46920.71831.60043.22655.46767.0432.2溴甲醇法检测分析520nm,6,(2),,A=0.01133+0.936C,R2=0.98867,1#~6#,,,33Tab.3Theresultofinclusioncontentdetectedbycolorimetricmethod1234560.8541.883.104.506.1897.688/(g/mL)0.92.13.34.86.68.2(wt%)0.090.210.330.480.660.822.3溶剂冲洗法检测分析4,345#1106∃%08/2011:1Fig.1ThemorphologyofinclusionsinpureAlsamples2Fig.2Thestandardcurveofaluminasolution4Tab.4Theresultofinclusioncontentfromsolventrinsingmethod123456/g0.0650.1280.1970.2640.3680.424w(%)0.3230.640.9821.3211.842.12,,,,3,,,:35#Fig.3Themicroscopicimageof5#samplebeforesolventrinsing45#Fig.4Themicroscopicimageof5#sampleaftersolventrinsings=v=V0Vs=V0VM+V0(2)m=m0ms=m0mM+m0(3)S&&&;v&&&;1107FOUNDRYTECHNOLOGYVol.32No.8Aug.2011V0&&&;Vs&&&;Vm&&&;m&&&;m0&&&;ms&&&;mM&&&(2)(3),:m=ss+(1-s)kp(4)k&&&,k=m/o,(k1.04);m&&&;o&&&(4),,55(wt%)Tab.5Theresultofinclusioncontentdetectedbyseveralmethods(wt%)1234560.450.691.543.115.276.790.090.210.330.480.660.820.320.640.981.321.842.125,,3,,(1),,,,(2),,,,,(3),,,,43,,,,;,,[1],,,.[J].,2009,(8):827830.[2],,,.[J].,2009,30(10):12861289.[3]AnsonJP,GruzleskiJE.EffectofHydrogenContentonRelativeShrinkageandGasMicroporotityinAl7%SiCasting[J].AFSTransactions,1999,107:135142.[4],,.[J].,2006,(4):1113.[5],.[M].:,1989.[6]MaropoulosS,RidleyN.InclusionsandfracturecharacteristicsofHSLAsteelforgings[J].MaterialsScienceandEngineeringA,2004,384(12):6469.[7],,,.[J].:,2005,41(12):613615.[8],,.[J].2004,2004:219220.1108