SC4312-408-02JT轴系铸锻件订货技术条件

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1、PAGE21/21SC4312-408-02JT轴系铸锻件订货技术条件TECHNICALREQUIREMENTSOFSHAFTINGCASTINGSANDFORGINGSORDERCONTENTS1.Steelforgings1.1General1.2Manufacture1.3Chemicalcomposition1.4Heattreatment1.5Testmaterial1.6Mechanicaltests1.7Visualandnon-destructiveexamination1.8Quality1.9Identif

2、ication1.10Certification1.11Attacheddrawing2.Coppercasting2.1General2.2Manufacture2.3Chemicalcomposition2.4Heattreatment2.5Testmaterial2.6Mechanicaltests2.7Inspectionandnon-destructiveexamination2.8Identification2.9Certification2.10Attacheddrawing面积：0.0625m211122222

3、222711000.06250.0625m2PAGE21/21SC4312-408-02JT轴系铸锻件订货技术条件TECHNICALREQUIREMENTSOFSHAFTINGCASTINGSANDFORGINGSORDER1.Steelforgings1.1General1.1.1Theintermediateandpropellershaftstobemadefromhigh-qualitycarbonsteelwithtensilestrengthlevelof560N/mm2.Onepieceofeachshaftpe

4、rship,andonesparepropellershafttobesuppliedpertwoshipsbyS/Y.Thereamingboltsaretobemadefromalloysteelswithtensilestrengthlevelof880N/mm2.Twenty-fourpiecesofforgingpership.Thepistonandbodyofhydraulicnuttobemadefromhigh-qualitycarbonsteelwithtensilestrengthlevelof600N/

5、mm2.Onepieceofpership.Thesterntubeseatandbearingseattobemadefromhigh-qualitycarbonsteelwithtensilestrengthlevelof400N/mm2.Onepieceofpership.1.2Manufacture1.2.1Forgingsaretobemadeatworks,whichhavebeenapprovedbyBV.Thesteelistobemanufacturedbytheelectricoroneofthebasic

6、oxygenprocesses.1.2.2Forcomponentsforgeddirectlyfromingotsorfromforgedbloomsorbilletsandinwhichthefibredeformationismainlylongitudinalthereductionratioisnottobelessthan3:1.1.2.3Wherethelengthofanysectionofashaftforgingislessthanitsdiameter,thereductionratioistobenot

7、lessthanhalfthatgivenin1.2.2.1.3Chemicalcomposition1.3.1Allforgingsaretobemadefromkilledsteels.1.3.2Forforgingsthechemicalcompositionofladlesamplesistocomplywiththefollowingoveralllimits:Carbon0.60%max(forshaftsandpiston&hyd.nut)0.23%max(forsterntubeseat&bearingseat

8、)Silicon0.45%maxManganese0.30-1.60%Sulphur0.040%maxPhosphorus0.040%maxResidualelements:Copper0.30%maxChromium0.30%maxMolybdenum0.15%maxNic