【作者】 冯弘； 王耀武； 田林海； 刘道新； 唐宾；

【Author】 FENG Hong~1 WANG Yaowu~1 TIAN Linhai~1 LIU Daoxin~2 TANG Bin~1 1. Taiyuan University of Technology, Taiyuan 030024 2. School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072

【机构】 太原理工大学表面工程研究所； 西北工业大学航空学院；

【摘要】 利用电火花沉积技术在 H13钢表面制备 Mo 改性层,借助图像分析仪、X 射线衍射、辉光放电光谱分析仪和显微硬度计,观察测试表面改性层的金相组织、相结构、成分分布及对应表面硬度。结果表明,Mo 改性层由白亮层、扩散层、热影响区组成,界面处改性层与基体元素相互扩散,呈现良好的冶金结合;Mo 改性层的显微硬度 HK_0.025=1482较基材 H13钢 HK_0.025=280提高了5倍左右,有利于抗磨损性能的改善。更多还原

【Abstract】 Molybdenum alloying layer was fabricated on the surface of H13 steel by electronic spark deposition （ESD） technique. The microstructure,element distribution and hardness of the alloying layer were analyzed using metalloscope,X-ray diffraction （XRD）,Glow Discharge Optical Emission Spectroscopy （GDOES） and microhardness tester.The results show that the molybdenum alloying layer is composed of "white layer",deposition layer,diffusion layer and heat effect area.Alloy elements in modification layer and H13 substrate near the interface diffuse each other to present an excellent metallurgical bonding of the modification layer with the substrate.The microhardness of molybdenum alloying layer (HK_0.025=1482) is 5 times much larger than that of H13 steel base (HK_0.025=280).The molybdenum alloying layer shows higher bonding strength with H13 steel substrate.更多还原