CAJ | 학술논문

为降低纯镍基合金涂层在高接触应力下的摩擦因数并进一步提高其耐磨性能,运用等离子喷涂技术在45#钢表面制备石墨/TiC协同改性镍基合金复合涂层.结果表明:复合涂层的摩擦因数较纯镍基合金涂层降低47.45％,磨损质量降低59.1％.纯镍基合金涂层与GCr15钢对摩时,表面产生明显的滑移和粘着变形,从而使纯镍基合金涂层表现出多次塑变磨损和粘着磨损.在复合涂层的磨损表面形成较软的、富含石墨和铁氧化物的转移层,使得其摩擦因数显著降低,质量磨损大为减少.复合涂层的磨损机理主要为转移层的疲劳剥落.
위강저순얼기합금도층재고접촉응력하적마찰인수병진일보제고기내마성능,운용등리자분도기술재45#강표면제비석묵/TiC협동개성얼기합금복합도층.결과표명:복합도층적마찰인수교순얼기합금도층강저47.45％,마손질량강저59.1％.순얼기합금도층여GCr15강대마시,표면산생명현적활이화점착변형,종이사순얼기합금도층표현출다차소변마손화점착마손.재복합도층적마손표면형성교연적、부함석묵화철양화물적전이층,사득기마찰인수현저강저,질량마손대위감소.복합도층적마손궤리주요위전이층적피로박락.
In order to reduce the friction coefficient of Ni-base alloy coating and further improve its wear resistance,Ni-base alloy composite coatings modified by both graphite and TiC particles were prepared by plasma spray technology on the surface of 45 carbon steel.The results show that friction coefficient of the composite coating is 47.45％ lower than that of the Ni-base alloy coating,and the wear mass loss is reduced by 59.1％.Slip lines and severe adhesive plastic deformation are observed on the worn surface of the Ni-base alloy coating,indicating that the wear mechanisms of the Ni-base alloy coating are multi-plastic deformation wear and adhesive wear.A soft transferred layer abundant in graphite and ferric oxide is developed on the worn surface of the composite coating,which reduces the friction coefficient and wear loss in a great deal.The main wear mechanism of the composite coating is fatigue delamination of the transferred layer.