1Cr18Ni9Ti的热处理工艺与耐蚀性研究

毕业设计（论文）中文摘要摘要奥氏体不锈钢，是指在常温下具有奥氏体组织的不锈钢。钢中含Cr约18%、Ni8%~10%、C约0.1%时，具有稳定的奥氏体组织。奥氏体铬镍不锈钢包括著名的18Cr-8Ni钢和在此基础上增加Cr、Ni含量并加入Mo、Cu、Si、Nb、Ti等元素发展起来的高Cr-Ni系列钢。奥氏体不锈钢无磁性而且具有高韧性和塑性，但强度较低，不可能通过相变使之强化，仅能通过冷加工进行强化，如加入S，Ca，Se，Te等元素，则具有良好的易切削性。本论文主要对奥氏体不锈钢1Cr18Ni9Ti热处理过程及其耐蚀性的研究，包括锻造、预先热处理、固溶处理、稳定化处理等材料成型的完整的热处理过程的介绍。并且本文还对不锈钢1Cr18Ni9Ti耐蚀性的原因，怎样做才能使其更具耐蚀性等等问题都做了一些介绍。不锈钢热处理过程中所用到的真空热处理炉，其结构、特性相当复杂，本文也对真空热处理炉做了一些介绍，用真空热处理炉做的不锈钢，可以防止不锈钢氧化脱碳保证工件的表面质量和机械性能。本文还对不锈钢1Cr18Ni9Ti的化学热处理、表面处理进行了一些介绍，表出面处理使其性能有更大的提高。最后文章对不锈钢热处理后的检验也做了介绍，主要为金相、力学性能等方面的检验。关键词：奥氏体不锈钢1Cr18Ni9Ti固溶处理稳定化处理耐蚀性毕业设计（论文）中文摘要Title:1Cr18Ni9TiheattreatmentprocessandcorrosionresistanceofAbstract:Austeniticstainlesssteelatroomtemperature,referstowithaustenitestainlesssteel.SteelcontainingCr18%,Ni8%~10%,Capproximately0.1%,withastableaustenite.Austeniticchromiumnickelstainlesssteelincludingtheprestigious18Cr-8NisteelandonthebasisofincreasedCr,NicontentandaddingMo,Cu,Si,Nb,TiandotherelementsofdevelopmentofhighCr-Niseriessteel.Austeniticstainlesssteelnon-magneticandhashightoughnessandplasticity,butitsstrengthislow,notpossiblethroughphasechangetointensive,canonlythroughthecoldhardening,suchastheaccessiontotheS,Ca,Se,Teandotherelements,ithasgoodcuttingperformance.Thisthesismainlyonausteniticstainlesssteel1Cr18Ni9Tiheattreatmentprocessandcorrosionresistanceofthefilm,includingthepreliminaryheattreatment,forging,solidsolutiontreatment,stabilizedmaterialformingacompleteheattreatmentprocessareintroduced.Andthispaperalsostainlesssteel1Cr18Ni9Ticorrosionreason,whatcanIdotomakeitmorecorrosionresistanceandsoonhavemadesomeintroduction.Stainlesssteelheattreatmentprocessusedinthevacuumheattreatmentfurnace,itsstructure,propertiesarecomplicated,thisarticlealsotothevacuumheattreatmentfurnacewereintroduced,withthevacuumheattreatmentKeywords:Austeniticstainlessstee1Cr18Ni9TiSolidsolutiontreatmentStabilizingtreatmentCorrosionresistance常州机电职业技术学院毕业论文第3页共51页目录1绪论.............................................................................................................................................41.1不锈钢的历史起源及分类.............................................................................................51.1.1铁素体不锈钢.....................................................................................................61.1.2马氏体不锈钢.....................................................................................................61.1.3奥氏体不锈钢.....................................................................................................61.2不锈钢的应用及工作环境.............................................................................................71.2.1不锈钢在建筑业中的应用.................................................................................71.2.2不锈钢在海洋装置上的应用.............................................................................81.3国内外不锈钢的发展情况...........................................................................................101.3.1彩色不锈钢.......................................................................................................101.3.2日本废不锈钢利用...........................................................................................121.3.3国内外不锈钢焊条使用现状...........................................................................121.4本论文的目的与意义...................................................................................................142.奥氏体不锈钢1Cr18Ni9Ti的热处理工艺过程...................................................................152.1奥氏体不锈钢1Cr18Ni9Ti的冶炼研究及锻造处理.................................................152.1.11Cr18Ni9Ti的凝固行为..................................................................................152.1.21Cr18Ni9Ti的锻造处理..................................................................................192.2奥氏体不锈钢热处理设备—真空热处理炉...............................................................202.2.1真空热处理炉概述...........................................................................................202.2.2真空热处理炉设计...........................................................................................232.3奥氏体不锈钢1Cr18Ni9Ti的固溶处理与稳定化处理.............................................272.3.1奥氏体不锈钢1Cr18Ni9Ti的固溶处理.........................................................272.3.2奥氏体不锈钢1Cr18Ni9Ti的稳定化处理.....................................................292.3.3奥氏体不锈钢1Cr18Ni9Ti的化学热处理.....................................................332.3全腐蚀试验...................................................................................................................352.4晶间腐蚀试验...............................................................................................................363奥氏体不锈钢1Cr18Ni9Ti的抗蚀性处理.............................................................................383.1造成不锈钢腐蚀的原因及机理...................................................................................383.2奥氏体不锈钢1Cr18Ni9Ti常用的抗蚀热处理方式.................................................403.3固溶处理与稳定化处理对耐蚀性能的影响...............................................................413.4讨论与结论.....................................