汽车工业学院毕业设计论文 定稿

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1、湖北汽车工业学院毕业设计论文摘要本文采用冷态涂敷方法，用水玻璃和松香作黏结剂，在45钢表面涂敷了镍基自熔性合金粉末Ni60和Ni60+WC25，利用炉内加热和感应加热的方法对涂层进行了重熔处理，并对重熔试样进行了销盘式磨粒磨损实验；对重熔涂层进行了显微硬度分析和金相组织分析，利用扫描电子显微镜(SEM)对涂层磨损后的形貌进行了分析。结果表明：重熔涂层具有很高的耐磨性，明显高于T10钢淬火后的试样；Ni60+WC重熔涂层的耐磨性稍高于Ni60重熔涂层；感应重熔涂层的耐磨性要高于炉内重熔的涂层；用松香作黏结剂的涂层稍高于用水玻璃作黏结剂的涂层；重熔涂层磨损表面的SEM形貌表明磨

2、损属于磨粒磨损。关键词：自熔性合金，感应重熔涂层，炉内重熔涂层，镍基WC，磨粒磨损23湖北汽车工业学院毕业设计论文AbstractNickelbaseself-fluxedalloypowderNi60andNi60+WC25arespreadedonthesurfaceof45steelbycold-statecoatingtechniquehasbeenshowninthispaper，thebondingagentsusewaterglassandrosin，andthecoatingsareremeltedusingfurnaceandinductionheatin

3、gmethods，thewear-resistantoftheremeltingcoatingsareinvestigatedbytheabrasivewearmachine.Thehardnessandmicrostructureofthecoatingsarealsoanalzyed，thewornsurfacemorphologyofthecoatingsareobservedbyelectronscanningmicroscope(SEM).Theresultsindicatethattheremeltingcoatingshaveveryhighwear-resi

4、stant，andapparentlyhigherthanthequenchedT10sample.Thewear-resistantofNi60+WC25remeltingcoatingsarebetterthanthatofNi60coatings，andtheinductionremeltingcoatingsarebetterthanthatofthefurnaceremeltingcoatings，alsotheremeltingcoatingsofrosinbondingagentsarebetterthanthatofwaterglassbondingagen

5、tscoatings.TheSEMmorphologyofthewornsurfaceshownitbelongstoabrasivewear.Keywords：self-fluxedalloy,inductionremeltingcoatings,furnaceremeltingcoatings，WCnickelbase，abrasivewear23湖北汽车工业学院毕业设计论文目录第一章概论.........................................................11.1课题背景及意义........................

6、........................11.2本课题及相关领域的国内外现状及发展............................11.2.1金属表面涂层强化发展现状.................................11.2.2重熔方式简介.............................................21.2.3重熔涂层的研究现状及发展.................................41.3主要研究内容................................................

7、..5第二章实验方法.....................................................62.1实验所用材料..................................................62.1.1自熔性合金粉末...........................................62.1.2实验所用自熔性合金粉末的基本特性.........................72.1.3基体材料........................