熱軋Q235B與Q345B帶鋼邊部缺陷研究.pdf

1、山東大學(xué)碩士學(xué)位論文熱軋Q235B與Q345B帶鋼邊部缺陷研究姓名：蘇士強(qiáng)申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料加工工程指導(dǎo)教師：王作成20080411ABSTRACTABSTRACTThehotrolledplate，whichplaysanimportantrolenotonlyinthedevelopmentofnationaleconomybutalsoinpromotingthedevelopmentofthenationalecono

2、myismainlyusedinships，bridges，boilers，containersandalsomanyotheraspectsjustlikepetrochemicaltechnology，engineeringmachineryandconstructionofnationaldefenseCarbonstructurealsteel，whichisapplicabletoagreatvarietyofconstruc

3、tion、bridge，railwayvehicle，vesselandchemicalengineering，isproducedinlargenumbersIthasvariousspeciesandspecificationsandisaversatileandeconomicalmaterialFoldedgroovemarktrimmingverticalcrack，ordinaryverticalcrack，cornercr

4、ack，edgecrack，verticalcrackintheside，rangepeelaresevenofthecomnlonedgedefectsduringthemanufactureofhotrolledplateMostcustomersmayUSeedgecuttingtomakegoodoftheedgedefectsduringuse，but弱aresultofthedemandoffieldworksomeuser

5、scannotcuttheedges，andthenthesedefectswillseriouslyaffecttheusabilityResearchingthedisciplineoftheformationofthecommondefectsofrolledplatetakingcorrespondingmeasUl骼tosolvetheseproblems，hasanimportantsignificancenotonlyto

6、directingmanufactureofhotrolledplate，butalsotoimprovingthequalityandSUCCESSrateofproductsInthesevendefectsabovestudiesonfoldedgroovemarktrimmingverticalcrackordinaryverticalcrackcomercrackaresomuchthattheformingmechanism

7、ofthemarerevealedcomprehensivelyhoweverstudiesonthelatterthreedefectsarecomparativelyrare，therefore，itisnecessaryforustostudytheformingmechanismofthethreedefects，whichwillbehelpfultofullunderstandingtheproductionsituatio

8、nandimprovingthequalityoftheproductConnectingwiththeproductionpracticeofLaiwuSteelGroup，hotrolledplateswiththedefectsofedgecrack、verticalcrackintheside，rangepeel，justlikeQ235B，Q345B，wereanalyzedbymeansofmacroinspectionop