钒对高铬铸铁组织及性能的影响-学位论文.doc

佳木斯大学工学硕士学位论文本科毕业设计（论文）PAGEII第PAGEXXXII页DATE\@"yy-M-d"24-4-10DATE\@"yy-M-d"24-4-10摘要高铬铸铁因其优越的性能而受到越来越广泛的重视。高铬铸铁相对合金钢有优良的耐磨性，相对一般白口铸铁有高得多的韧性、强度，同时它还兼有良好的抗高温和抗腐蚀性能，加之生产便捷、成本适中，所以被誉为当代最优良的抗磨料磨损材料之一。本文就高铬铸铁的铸造及性能进行了比较系统的研究，首先设计高铬铸铁的成分进行铸造，然后利用金相显微镜对试样的组织形态、化学成分、物相组成进行了分析，最后通过硬度测试，冲击实验进行性能检测。结果表明，高铬铸铁的组织主要由基体和碳化物组成，基体的相是主要奥氏体另外还有部分马氏体，而碳化物主要是Cr7C3。高铬铸铁的硬度及耐磨性都比较高。关键词：高铬铸铁；铸造；耐磨性；摩擦磨损；AbstractBecauseofitssuperiorperformance,highchromiumcastironattractedmoreandmoreattention.Highchromiumcastironhasmoreexcellentwearresistancethanalloysteel,relativetothegeneralwhitecastironhashighertoughness,strength,atthesametime,italsohasgoodresistancetohightemperatureandcorrosionresistance,andconvenientproduction,lowcost,andisregardedasthebestofcontemporaryantiabrasionmaterial.Inthispaper,thepropertiesofhighchromiumcastironcastingandcomparesthesystem,firstofallthedesignofhighchromecastironcomponentforcasting,thenbyusingopticalmicroscope,scanningelectronmicroscope,onthesampletissuemorphology,chemicalcomposition,phasecompositionareanalyzed,finally,hardnesstestfrictionandimpacttest,performancetesting.Theresultsshowthat,thestructureofhighchromiumironismainlycomposedofabaseandcompositionofcarbide,matrixphaseisthemainpartofausteniteandmartensite,andthecarbideisCr7C3.Thehardnessofhighchromiumcastironandthewearresistanceishigher.Keywords:highchromiumcastiron;casting;wearresistance;frictionandwear.目录TOC\o\h\zHYPERLINK\l"_Toc194099929"摘要PAGEREF_Toc194099929\hIHYPERLINK\l"_Toc194099930"AbstractPAGEREF_Toc194099930\hIIHYPERLINK\l"_Toc194099931"第1章绪论PAGEREF_Toc194099931\h1HYPERLINK\l"_Toc194099932"1.1课题的目的、意义PAGEREF_Toc194099932\h1HYPERLINK\l"_Toc194099933"1.1.1课题的目的PAGEREF_Toc194099933\h1HYPERLINK\l"_Toc194099934"1.1.2课题的意义PAGEREF_Toc194099934\h1HYPERLINK\l"_Toc194099935"1.2课题背景PAGEREF_Toc194099935\h1HYPERLINK\l"_Toc194099936"1.2.1课题背景PAGEREF_Toc194099936\h1HYPERLINK\l"_Toc194099937"1.3文献综述PAGEREF_Toc194099937\h1HYPERLINK\l"_Toc19409