摘要
采用超音速火焰喷涂技术在45钢表面制备纳米NiCrBSi-TiB2涂层,采用XRD、SEM等手段对涂层的微观结构进行表征,同时研究了该纳米涂层和常规NiCr-Cr3C2涂层的抗滑动磨损性能。结果表明,纳米NiCrBSi-TiB2涂层具有晶粒纳米化和组织均匀化特点,其平均晶粒尺寸约为46nm。与NiCr-Cr3C2涂层相比,纳米NiCrBSi-TiB2涂层具有更优的抗磨损性能,这主要归因于纳米涂层优异的断裂韧性和硬度配合以及微观组织均匀化分布。
A nanostructured NiCrBSi-TiB2 coating was prepared on 45 steel substrate by high velocity oxy-fuel process（ HVOF）. The microstructure and crystal structure were characterized and analyzed by means of X-ray diffraction, scanning electron microscopy.Meanwhile, the sliding wear resistance of NiCrBSi-TiB2 coating and NiCr-Cr3C2 coating were evaluated by ball-on-disc testing.Nanostructured NiCrBSi-TiB2 coating has the characteristics of nano grain and microstructure homogenization with the average grain size of about 46 nm. The nanostructured NiCrBSi-TiB2 coating has a better wear resistance than that of the NiCr-Cr3C2 coating,which results in that the nanostructured coating has excellent fracture toughness,hardness and microstructure uniformity distribution.
出处
《金属热处理》
CAS
CSCD
北大核心
2015年第7期74-77,共4页
Heat Treatment of Metals
基金
广东省博士启动项目(S2013040016360)
中山市科技计划项目(20123A380)
