硼含量对高硼铁基耐磨合金组织和性能的影响毕业论文.doc

广西大学本科毕业论文硼含量对高硼铁基耐磨合金组织和性能的影响摘要高硼铁基耐磨合金具有硼化物的硬度高和热稳定性良好以及合金元素加入量少和生产成本低且工艺简单的优势，它在未来的耐磨材料领域有着广泛的应用前景。高硼铁基耐磨合金中硼元素主要以硼化物形式存在，硼化物代替传统铁基耐磨合金中的碳化物作为耐磨相，用硼化物替代碳化物后，由于碳已不是形成耐磨相的元素，所以可以大大降低其加入量，得到含碳量较低的基体，因而在保证铸铁具有良好耐磨相的同时，还具有强韧性的基体，得到性能更好的耐磨材料。因此，研究和开发高硼铁基耐磨合金对经济发展有着重要的意义。本文以高硼铁基耐磨合金的成分优化为研究目标，通过优化配比，根据力学性能测试和金相组织分析，考察合金最优性能并得出最优的组合。研究结果表明，经过优化设计后的高硼铁基耐磨合金的成分（wt%）为：0.36%C、3.5%B、1.0%Si、1.0%Mn、1.0%Cu、1.5%Cr、0.5%V，余为Fe。此时合金的综合性能最好，既有较高的强度、硬度和耐磨性能，又有一定的塑性和韧性。关键词：高硼合金硼化物耐磨性耐磨材料AbstractHigh-boroniron-basedwear-resistantalloywithhighhardnessofborideandgoodthermalstabilityandaddingalloyingelements,andlowproductioncostlessandtheadvantagesofsimpleprocess,wear-resistantmaterialsinthefutureithaswideapplicationprospects.High-boroniron-basedwear-resistantalloyofboronexistsmainlyborides,borideinsteadofthetraditionaliron-basedwear-resistantalloyasawear-resistantcarbidephase,boroncarbidereplacement,duetotheformationofwear-resistantcarbonisnotphaseelements,cangreatlyreducetheirdosage,havealowercarboncontentofthematrix,thusensuringagoodwear-resistantcastironphase,itisalsothematrixwithhightoughness,wear-resistantmaterialshavebetterperformance.Therefore,theresearchanddevelopmentofhigh-boroniron-basedwear-resistantalloyhavegreatsignificanceontheeconomicdevelopment.Inthispaper,high-boroniron-basedwear-resistantalloycompositionoptimizationistheresearchobjectivesbyoptimizingtheratioofthetestbasedonthemechanicalpropertiesandmicrostructure,aswellasthebestoptimalperformancealloycombinationwasstudied.Theresultsshowthattheoptimizeddesignofhigh-boroniron-basedpost-wear-resistantalloycomposition(wt%)was:0.36%C，3.5%B,1.0%Si,1.0%Mn,1.0%Cu,1.5%Cr，0.5%V,thanfortheFe.Atthispointthebestoverallperformancealloys,bothhighstrength,hardnessandwearresistance,hasacertainplasticityandtoughness.Keywords:High-boronalloyBorideWearresistanceWear-resistantmaterials目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc296373390"第一章绪论PAGEREF_Toc296373390\h1HYPERLINK\l"_Toc296373391"1.1耐磨材料在经济建设中的作用PAGEREF_Toc296373391\h1