稀土對2Cr13不銹鋼耐腐蝕性能影響的研究.pdf

1、內(nèi)蒙古科技大學(xué)碩士學(xué)位論文稀土對2Cr13不銹鋼耐腐蝕性能影響的研究姓名：高學(xué)中申請學(xué)位級別：碩士專業(yè)：鋼鐵冶金指導(dǎo)教師：楊吉春20070530內(nèi)蒙古科技大學(xué)碩士學(xué)位論文6StudyoftheEffectofRareEarthsonCrosionResistanceof2Cr13StainlessSteelsAbstract2Cr13martensitestainlesssteelhasmanygoodpropertiesItisthe

2、typicalmaterialofturbineblade.Butwhen2Cr13isusedunderoceanenvironmentthecrosiveresistanceofitisbaddifficulttomeetcrosiveresistanceneed.Therawmaterialsoftheexperimentarethe2Cr13stainlesssteeltheREadditiveisthepureCe.Itsme

3、ltedexperimentalsteelwithdifferentcontentsofCebyusing6kgvacuuminductancefurnace.ItanalysedREresidualquantityintheexperimentalsteeltheeffectofREto2Cr13stainlesssteel’sstructureinclusionbyusingopticalmicroscopeSEMatthesame

4、timeitanalysedtheeffectofREtocrosiveresistanceofstainlesssteelbyusingacceleratedcrosiontestperiodicsoaktestelectrochemicaltest.WithincreasingtheamountofREadditiveREresidualquantityintheexperimentalsteelincreasedaswell.RE

5、hadeffectoninclusion’smetamphismspheroidizationaluminainclusionmanganesesulfideinclusionwerechangedintodiffusedsphericalellipsoidalCeAlO3、Ce2O2Swhichplayedaroleofrefiningthecrystalgrains.UnderthesameheattreatingREhadobvi

6、ouseffectonstructureofexperimentalsteel.MartensiteofquenchingstructuregotsmallersmallercarbideoftemperstructuregotmediffusedREresultedindelayingofMartensite’sdecompositionhinderedcarbide’saggregationcoarsening.Weightloss

7、testsoakingin10percenthydrochlicacidshowedexperimentalsteeladdedREhadslowercrosionratethanexperimentalsteelnotaddedRE.3.5percentsodiumchlidesolutioncrosiontestshowedREinthe2Cr13stainlesssteelmadeexperimentalsteel’spolari

8、zedresistanceofelectrochemicalimpedancespectroscopygotgreatercrosiveelectricpotentialofpolarizationcurveshuffledcrosioncurrentdensityreduced.DependingonstudyresultsaboveitcouldconcludeREaddedto2Cr13martensitestainlessste