奥氏体304不锈钢磁法检测实验研究

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1、奥氏体304不锈钢磁法检测实验研究摘要：奥氏体304不锈钢广泛应用于石油化工、机械制造和核电等行业的重要部位，但由于其使用条件比较恶劣，为保证设备的安全运行，必须加强对这种材料的检测。本文以奥氏体304不锈钢为研究对象，了解到奥氏体不锈钢中的奥氏体相为顺磁性，在应力条件下形变后会诱发马氏体相变，从而能使不锈钢具有磁性的特性，利用这一原理对奥氏体不锈钢进行磁法检测并以此研究应力作用对材料磁性的影响与材料内部微观结构的变化。通过对奥氏体304不锈钢进行拉伸实验运用高斯计测量拉伸过程中的磁场变化，可以建立应力应变与其漏磁场的关系并得到一定规律，再通过X射线衍射实验分析物相变化，观察磁

2、场强度变化与马氏体相转变的相关性，进而证明了可通过检测漏磁场的强度对奥氏体304不锈钢进行检测。通过实验研究得到奥氏体304不锈钢损伤和应力集中的相关评价指标，进而实现对其进行早期的无损评价。本课题为奥氏体304不锈钢提供了一种不同于常规无损检测的新的检测手段，对磁法检测技术的推广具有重要意义。关键词:奥氏体不锈钢马氏体相变磁法检测无损评价指导老师签名：TheExperimentsof304AusteniticStainlessSteelbyMagneticMethodsStudentname：WangYuruClass：110813Supervisor:SongKaiABST

3、RACT:304austeniticstainlesssteeliswidelyusedinimportantpartsofthepetrochemicalindustry,machinerymanufacturing,andnuclearpowerandotherindustries,butusuallytheconditionsisrelativelypoor,soinordertoensurethesaftyofequipmentoperation,thedetectionofthismaterialmustbestrengthened.Inthispaper,304au

4、steniticstainlesssteelforthestudy,learnedofausteniticstainlesssteelintheaustenitephaseisparamagnetic,understressconditionscaninducemartensitictransformationafterdeformation,therebyenablingthemagneticpropertiesofstainlesssteel,Usingthisprincipleofausteniticstainlesssteelandthusdetectmagneticc

5、hangesinstressresearchontheimpactofmagneticmaterialandinteriormaterialmicrostructure.304austeniticstainlesssteelbytensiletestGaussmeasuredthemagneticfieldchangesduringstretching,youcancreatestressandstrainrelationswithitsdrainfieldandgettocertainrules,andthenanalyzedbyX-raydiffractionphasech

6、angeswereobservedmagneticfieldintensityandrelevanceofmartensitictransformation,andthusprovedthattheleakageisdetectedbythemagneticfieldstrengthofaustenitic304stainlesssteelfortesting.Get304austeniticstainlessinjury-relatedevaluationandexperimentalstudyofstressconcentration,thusachievingitsear

7、lynondestructiveevaluation.Thispaperprovidesa304austeniticstainlesssteelwhichisdifferentfromconventionalnon-destructivetestingofnewdetectionmethodsisofgreatsignificanceforthepromotionofmagneticmemorytechnology.Keywords：AusteniticstainlessMartensiti