CAJ | 학술논문

镍铬-碳化铬涂层是航空发动机常用的高温耐磨涂层之一。本研究通过优化大气等离子喷涂工艺，用烧结型粉末制备了镍铬-碳化铬涂层。涂层显微组织均匀，氧化物弥散分布、孔洞及未熔颗粒较小。Cr3C2-30％NiCr涂层的拉伸结合强度不小于40MPa，显著高于Metco81VF—Ns粉末喷涂的涂层，用两种粉末喷涂涂层的表面洛氏硬度及耐砂粒冲蚀性能相近。Cr3C2-30％NiCr涂层性能符合设计要求，喷涂工艺现已被用于某型号发动机的前轴承机匣零部件的喷涂生产。
얼락-탄화락도층시항공발동궤상용적고온내마도층지일。본연구통과우화대기등리자분도공예，용소결형분말제비료얼락-탄화락도층。도층현미조직균균，양화물미산분포、공동급미용과립교소。Cr3C2-30％NiCr도층적랍신결합강도불소우40MPa，현저고우Metco81VF—Ns분말분도적도층，용량충분말분도도층적표면락씨경도급내사립충식성능상근。Cr3C2-30％NiCr도층성능부합설계요구，분도공예현이피용우모형호발동궤적전축승궤갑령부건적분도생산。
Chromium carbide nickel-chrome cermet coating is one of the most applied wear resistant coatings operating at high temperatures for aero-engine. The present work addresses the chromium carbide nickel-chrome coating prepared by an optimized air plasma spraying process with a sintered Cr3C2-30%NiCr powder. The coating possesses a uniform microstructure and the oxides are evenly distributed with accompanying small porosities and un-melted particles. The Cr3C2-30% NiCr coating has minimum tensile bond strength of 40 MPa which is significantly higher than that of the coating sprayed with Metco 81 VF-NS powder. However, the superficial Rockwell hardness and blast grit erosion resistance of the above two coatings are similar. The developed spray processes have been applied to plasma spray production of a front-bearing casing for an aero-engine due to its satisfaction of all en~neerin~ renllirementg