PAGE\*MERGEFORMATXXXXXXXX大学本科生课程论文题目：H型钢残余应力的研究现状学生姓名：学号：专业：班级：指导教师：PAGE\*MERGEFORMATIH型钢残余应力的研究现状摘要H型钢是一种截面面积分配更加优化、强重比更加合理的经济断面高效型材，因其断面与英文字母“H”相同而得名。由于H型钢的各个部位均以直角排布，因此H型钢在各个方向上都具有抗弯能力强、施工简单、节约成本和结构重量轻等优点，已被广泛应用。H型钢分为热轧H型钢和焊接H型钢（H）两种，热轧H型钢又分为宽翼缘H型钢（HW）中翼缘H型钢(HM)和窄翼缘H型钢（HN）三种。众所周知，钢材中残余应力的存在对钢材的使用性能尤其是疲劳性能有很大影响。钢材中残余应力的形成主要有三个途径：钢材在热轧或焊接后其断面的不均匀冷却、钢材组织发生相变、钢材受到矫直等冷加工。本课题以H型钢为研究对象，分别从热轧后冷却残余应力、矫直后残余应力、焊接后残余应力三个方面研究H型钢残余应力的研究现状。关键词：H型钢；残余应力；热轧；矫直；焊接PAGE\*MERGEFORMATIIThecurrentresearchstatusofh-beamresidualstressAbstractHsectionsteelisakindofcrosssectionareaallocationoptimizationandweightmorereasonablethaneconomicsectioneffectiveprofiles,becauseofitscrosssectionthesameastheEnglishletter"H"thename.Sincethedifferentpartsofh-beamwithorthogonalconfiguration,soh-beaminalldirectionshasbendingcapacity,simpleconstruction,costsavingandstructurelightweightetc,andhasbeenwidelyused.H-beamisdividedintohotrolledHsectionsteelandweldingh-beam(H),hot-rolledh-beamisdividedintowideflangeh-beam(HW)oftheh-beamflange(HM)andnarrowtheh-beamflange(HN)three.Itiswellknownthatthepresenceofresidualstressinsteelontheuseofsteelperformanceespeciallyhasagreatimpactonthefatigueperformance.,theformationoftheresidualstressinsteeltherearethreemainways:inthecrosssectionofthesteelafterhotrollingorweldingtheunevencooling,steelgroupphasechange,steelcoldstraighteningetc.Thistopictoh-beamastheresearchobject,respectivelyfromthecoolingafterhotrollingresidualstressandresidualstressafterstraightening,weldingresidualstressafterthreeaspectsstudythecurrentresearchstatusofh-beamresidualstress.Keywords:H-Beam;residualstress;hotrolling;straightening;weld目录TOC\h\z\t"标题1,2,标题2,3,标题3,4,标题,1,其它一级标题,1,副标题,2"HYPERLINK\l"_Toc391975230"摘要PAGEREF_Toc391975230\hIHYPERLINK\l"_Toc391975233"1.引言PAGEREF_Toc391975233\h1HYPERLINK\l"_Toc391975234"1.1研究背景PAGEREF_Toc391975234\h1HYPERLINK\l"_Toc391975235"1.2研究的目的和意义PAGEREF_Toc391975235\h