摘要
以鲨鱼盾鳞表面非光滑形态为模型,制备了由镍基合金粉末熔覆层和45钢基体构成的起伏型、平面型仿生非光滑试样,并进行磨粒磨损实验和磨痕观察,分析磨损机理。结果表明:平面型涂层耐磨性明显优于起伏型涂层;设计和制备耐磨性良好涂层的判据是几何硬化率(GHR)不小于50%。起伏型涂层的磨损机理:硬化带表面自身非光滑磨损机制与磨头对硬化带的冲击磨损机制共同作用。平面型涂层的磨损机理:硬化带表面自身非光滑磨损机制与表面几何形貌非光滑磨损机制相结合。
On the basis of the morphology of organism＇s surface,bionic non-smooth coatings of wave and plane-type on 45 steel were prepared by laser cladding. The abrasive wear test was carried out with abrasion tester, and the wear scar was observed. The wear mechanism was analyzed. The results show that the wear resistance of plane type coating is remarkably better than that of the wave type. The criterion for designing and preparing a good wear-resistant coating is： geometric hardening rate （GHR） was no less than 50%. The wear mechanism of wave-type coating is that the hardening belt＇s non-smooth surface and the impact of the grinding head function together. The wear mechanism of flat-type coating is the combination of the wear mechanisms of the hardening belt＇s non-smooth sur- face and its non-smooth geometric surface morphology.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2013年第12期32-36,共5页
Journal of Materials Engineering
基金
"十二五"农村领域国家科技计划课题资助项目(2011BAD20B01)
