Mitelea Ion, Oancă Octavian, Bordeaşu Ilare, Crăciunescu Corneliu M
Department of Materials and Manufacturing Engineering, Politehnica University of Timisoara, 300026 Timisoara, Romania.
Department of Mechanical Machines, Equipments and Transportation, Politehnica University of Timisoara, 300026 Timisoara, Romania.
Materials (Basel). 2016 Mar 17;9(3):204. doi: 10.3390/ma9030204.
The cavitation erosion resistance of CuAl10Ni5Fe2.5Mn1 following plasma spraying with Al₂O₃·30(NiAl) powder and laser re-melting was analyzed in view of possible improvements of the lifetime of components used in hydraulic environments. The cavitation erosion resistance was substantially improved compared with the one of the base material. The thickness of the re-melted layer was in the range of several hundred micrometers, with a surface microhardness increasing from 250 to 420 HV 0.2. Compositional, structural, and microstructural explorations showed that the microstructure of the re-melted and homogenized layer, consisting of a cubic Al₂O₃ matrix with dispersed Ni-based solid solution is associated with the hardness increase and consequently with the improvement of the cavitation erosion resistance.
考虑到液压环境中使用的部件寿命可能得到改善，对采用Al₂O₃·30(NiAl)粉末进行等离子喷涂并激光重熔后的CuAl10Ni5Fe2.5Mn1的抗气蚀性能进行了分析。与母材相比，其抗气蚀性能有了显著提高。重熔层厚度在几百微米范围内，表面显微硬度从250 HV 0.2提高到420 HV 0.2。成分、结构和微观结构研究表明，重熔和均匀化层的微观结构由具有分散镍基固溶体的立方Al₂O₃基体组成，这与硬度增加相关，从而与抗气蚀性能的提高相关。
