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《二辊斜轧延伸大口径P92厚壁管分层缺陷倾向性研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第47卷第1O期V0【.47,No.102012年1O月Oetoher2012二辊斜轧延伸大口径P92厚壁管分层缺陷倾向性研究尹元德。,李胜祗,康永林,王鹏展。,王向东。,李国涛。(1.北京科技大学材料科学与工程学院,北京100083;2.安徽业大学材料科学与工程学院,安徽马鞍山243002;3.扬州诚德钢管有限公司技术中心,江苏扬州225200)摘要:为研究不同轧辊转速、送进角、轧辊人口锥角等工艺参数对大口径厚壁P92钢管二辊斜轧延伸过程分层缺陷形成倾向性的影响,借助于商用有限元软件MSC.SuperForm,对不同工艺条件
2、下大口径厚壁P92钢管二辊斜轧延伸过程进行了三维热力耦合模拟;采用Oyane韧性断裂准则分析了轧件损伤场及钢管分层缺陷的倾向性。研究结果表明:钢管内表邻近顶头接触区存在破裂高危带,轧件最大损伤特征值随轧辊转速的降低、送进角和轧辊入口锥角的增大而减小,发生分层缺陷的倾向性降低。此研究为揭示钢管分层缺陷形成机制,确定缺陷发生的敏感工况,制定防止或减轻分层缺陷的有效措施提供科学依据。关键词:大口径P92厚壁管;二辊斜轧延伸;工艺参数;分层缺陷;数值模拟文献标志码:A文章编号:0449—749X(2O12)1O一005205钢-呈Te
3、ndency0fLaminationDefect0fThick-WailedP92PipeWithadSLargeDiameterElongatedby2一RollRotaryRollingProcess铁YINYuan—de,LISheng—zhi。,KANGYong—lin,WANGPeng—zhan。,WANGXiang—dong。,IIGuo—tao。(1.SchoolofMaterialsScienceandEngineering,UniversityofScienceandTechnologyBeijing,Bei
4、jing100083.China;2.SchoolofMaterialsScienceandEngineering,AnhuiUniversityofTechnology,Ma’anshan243002,Anhui,China;3.TechnologyCente,YangzhouChengdeSteelPipeCo.,Ltd.,Yangzhou225200,Jiangsu,China)Abstract:Toinvestigatetheinfluenceofdifferenttechnologicalparameterssuch
5、asrollrotationalspeed,feedangleandrollentranceconeangleontendencyoflaminationdefectofseamlessP92steelpipethick-walledwithlargediam—eterelongatedby2Rollrotaryrollingprocess,withtheaidofcommercialFEcodeMSC.SuperForm,3Dthermo—mechanicalsimulationswerepresented.Thedamag
6、efieldoftherollingpieceduringtheelongatingprocess,andthetendencyoflaminationdefectofsteelpipeswereanalyzedusingOyaneductilefracturecriterion.Itisfoundfromthesimulationthatahighdangerouscrackbandexistsintheinternalsurfacelayeroftherollingpiece,adjacenttothecontactzon
7、ewiththeplug.Furthermoretheinfluenceofrollrotationalspeed,feedangleandrollentranceconean—gleonthedamagefiledwereinvestigated.Theresultshowsthatthemaximumcharacteristicvalueofductilefractureofrollingpiecedecreaseswiththedecreaseofrollrotationalspeed,theincreaseoffeed
8、angleandrollentranceconeangle,andthetendencyoflaminationdefectreduces.Thescientificbasiscanbeprovidedforrevealingformationmechanismsof1ami
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