为了给国内航空发动机风扇叶片Cu Ni In涂层制备提供相关技术支持,利用等离子喷涂技术在Ti6Al4V基体材料上制备Cu Ni In涂层,观察涂层微观结构,分析涂层孔隙率、界面污染物等,研究喷涂功率、喷涂距离及基体表面粗糙度对涂层结合强度、...为了给国内航空发动机风扇叶片Cu Ni In涂层制备提供相关技术支持,利用等离子喷涂技术在Ti6Al4V基体材料上制备Cu Ni In涂层,观察涂层微观结构,分析涂层孔隙率、界面污染物等,研究喷涂功率、喷涂距离及基体表面粗糙度对涂层结合强度、显微硬度等的影响。结果表明:喷涂功率的增加会导致Cu Ni In涂层显微硬度增加,结合强度降低;喷涂距离增加,涂层显微硬度和结合强度都呈现先增后减的趋势;基体表面粗糙度增加,涂层结合强度增加,但粉末沉积率降低;优化工艺为喷涂功率32.3 k W,喷涂距离85 mm,采用36目白刚玉喷砂(基体表面粗糙度6.3μm);优化工艺制备的涂层结合强度达到45.83 MPa,显微硬度达到159.2 HV,孔隙率为0.578%,可为国内风扇叶片Cu Ni In涂层制备提供相关技术支持。展开更多
During atmospheric plasma spraying,a cooling process usually plays an important role in the coating quality,especially for the oxidation containment of metallic coatings.CuNiIn and Mo coatings were prepared using atmo...During atmospheric plasma spraying,a cooling process usually plays an important role in the coating quality,especially for the oxidation containment of metallic coatings.CuNiIn and Mo coatings were prepared using atmospheric plasma spraying with different cooling processes.The obtained coatings were characterized in terms of microstructure,microhardness and tensile strengths.The relation between the coating microstructure and their fretting fatigue behavior was emphasized.The results show that the sensitivity of Mo coatings to the cooling process is lower than CuNiIn coatings.The resistance to fretting fatigue is determined by the coating microhardness,correlated with the contents of oxides and pores.The fretting wear mechanisms of both the coatings are galling,third body abrasive wear and material transfer.展开更多
大气等离子喷涂(APS)工艺喷涂Ni Al/Cu Ni In涂层,常用于提升航空发动机风扇机匣、涡轮轴延伸段和叶片榫头等零部件的抗微动磨损性能。为了保证涂层可以承受零件微动状态下的剪切载荷,需要考核涂层的剪切强度。影响涂层的剪切强度的因...大气等离子喷涂(APS)工艺喷涂Ni Al/Cu Ni In涂层,常用于提升航空发动机风扇机匣、涡轮轴延伸段和叶片榫头等零部件的抗微动磨损性能。为了保证涂层可以承受零件微动状态下的剪切载荷,需要考核涂层的剪切强度。影响涂层的剪切强度的因素主要包括涂层的状态和测试过程等两方面,本文重点研究剪切测试过程,通过六西格玛工具分析涂层的失效状态,分析剪切实验的影响因素并研究改进措施,提高搭接剪切强度实验的一次合格率。展开更多
文摘为了给国内航空发动机风扇叶片Cu Ni In涂层制备提供相关技术支持,利用等离子喷涂技术在Ti6Al4V基体材料上制备Cu Ni In涂层,观察涂层微观结构,分析涂层孔隙率、界面污染物等,研究喷涂功率、喷涂距离及基体表面粗糙度对涂层结合强度、显微硬度等的影响。结果表明:喷涂功率的增加会导致Cu Ni In涂层显微硬度增加,结合强度降低;喷涂距离增加,涂层显微硬度和结合强度都呈现先增后减的趋势;基体表面粗糙度增加,涂层结合强度增加,但粉末沉积率降低;优化工艺为喷涂功率32.3 k W,喷涂距离85 mm,采用36目白刚玉喷砂(基体表面粗糙度6.3μm);优化工艺制备的涂层结合强度达到45.83 MPa,显微硬度达到159.2 HV,孔隙率为0.578%,可为国内风扇叶片Cu Ni In涂层制备提供相关技术支持。
基金the National Natural Science Foundation of China[grant numbers 51875424,51501137 and 51702244]the Fundamental Research Funds for the Central Universities[WUT:2019III033].
文摘During atmospheric plasma spraying,a cooling process usually plays an important role in the coating quality,especially for the oxidation containment of metallic coatings.CuNiIn and Mo coatings were prepared using atmospheric plasma spraying with different cooling processes.The obtained coatings were characterized in terms of microstructure,microhardness and tensile strengths.The relation between the coating microstructure and their fretting fatigue behavior was emphasized.The results show that the sensitivity of Mo coatings to the cooling process is lower than CuNiIn coatings.The resistance to fretting fatigue is determined by the coating microhardness,correlated with the contents of oxides and pores.The fretting wear mechanisms of both the coatings are galling,third body abrasive wear and material transfer.
文摘大气等离子喷涂(APS)工艺喷涂Ni Al/Cu Ni In涂层,常用于提升航空发动机风扇机匣、涡轮轴延伸段和叶片榫头等零部件的抗微动磨损性能。为了保证涂层可以承受零件微动状态下的剪切载荷,需要考核涂层的剪切强度。影响涂层的剪切强度的因素主要包括涂层的状态和测试过程等两方面,本文重点研究剪切测试过程,通过六西格玛工具分析涂层的失效状态,分析剪切实验的影响因素并研究改进措施,提高搭接剪切强度实验的一次合格率。
