期刊论文

中文

湖南农业大学学报(自然科学版)

1007-1032

2018

44

1

106-110

10.13331/j.cnki.jhau.2018.01.020

15B109:湖南省教育厅优秀青年项目 2016NK2158:湖南省重点研发计划项目 CX2017B382:湖南省研究生科研创新项目

本校为第一机构

采用美科LF–HVOF超音速火焰喷涂系统,对45钢表面喷涂厚约300 μm的WC–12Ni硬质涂层,利用显微硬度计、X射线衍射仪和场发射扫描电镜分别表征硬质涂层的硬度、相结构和表面形貌;以65Mn弹簧钢作为对比材料,利用湿砂橡胶轮磨损试验测试涂层的磨料磨损性能。结果表明:WC–12Ni硬质涂层硬度为1 020 HV0.3,碳化钨硬质颗粒的相结构为WC相与少量WC_(1–x)相,粘结相镍为面心立方Ni相,碳化钨硬质颗粒大小为2~10 μm,均匀致密,孔隙率为8%;随砂水比由3∶1降至3∶2、载荷由40 N增至110 N,WC–12Ni硬质涂层的磨损失重在53~80 mg范围波动,仅为65Mn弹簧钢磨损失重的1/14;WC–12Ni硬质涂层的磨损为粘结剂磨损导致...

WC-12Ni hard coating was sprayed on the surface of 45 steel with a thickness of 300 μm by using the LF-HVOF flame spray system. The hardness, phase structure and surface morphology of the hard coatings were characterized by microhardness tester, X-ray diffractometer and field emission scanning electron microscopy. The abrasive wear performance of the hard coatings was tested by using the wet sand rubber wheel abrasion tester, as compared with the 65Mn spring steel. The results showed that the WC-12Ni coatings is mainly composed of 2-10 μm WC ...