It is necessary to develop burn-resistant and thermal barrier complex functional coatings on the titanium alloys surface due to the poor high temperature performance for titanium materials and the problem of“titanium...It is necessary to develop burn-resistant and thermal barrier complex functional coatings on the titanium alloys surface due to the poor high temperature performance for titanium materials and the problem of“titanium fire”which is easily happened.MTU Aero Engines GmbH has developed a complex functional coating which has great performance of burn resistant and sealing,the coatings has already been applied on compressor blades and casing for aero-engines and showed great performance.In this study,the complex functional coating which is composed of an electro-spark deposited amorphous Ti40Zr25Ni3 burn-resistant layer and a high-energy plasma spraying prepared YSZ thermal barrier layer was prepared on titanium alloys surface.Then the heat insulation ability,burn resistant performance and the bonding strength were investigated.The experimental results showed that the interface between the coating and the matrix was typical metallurgical bonded,and the average bonding strength was 36.335 MPa;when the temperature of the flame on the one side of the specimen reached 600℃,the average insulated temperature of the coating samples was 70.67℃;when the flame temperature was 350℃,the titanium samples without the complex functional coatings were burned,while the samples with the coating showed great performance of burn resistant even when the temperature was 750℃.This indicates that the new functional coating has good heat-insulating and burn-resistant performance.展开更多
为了评价农机入土部件材料的磨损性能,设计了一台磨损性能试验机,通过整体结构和关键部件设计实现了不同材质的旋耕刀/圆盘耙和犁铧部件在特定磨料条件下的磨损性能测试试验。利用ANSYS Workbench有限元分析软件对犁铧磨损试验系统的旋...为了评价农机入土部件材料的磨损性能,设计了一台磨损性能试验机,通过整体结构和关键部件设计实现了不同材质的旋耕刀/圆盘耙和犁铧部件在特定磨料条件下的磨损性能测试试验。利用ANSYS Workbench有限元分析软件对犁铧磨损试验系统的旋转十字架进行静力学分析,根据实际工况添加载荷和约束,分析得到旋转十字架的总变形和应力分布云图,验证了设计的合理性。基于Dyna Test Expert动态试验软件的测控系统实现试验转速、时长等参数的设置,以及试验结果的存储。展开更多
文摘It is necessary to develop burn-resistant and thermal barrier complex functional coatings on the titanium alloys surface due to the poor high temperature performance for titanium materials and the problem of“titanium fire”which is easily happened.MTU Aero Engines GmbH has developed a complex functional coating which has great performance of burn resistant and sealing,the coatings has already been applied on compressor blades and casing for aero-engines and showed great performance.In this study,the complex functional coating which is composed of an electro-spark deposited amorphous Ti40Zr25Ni3 burn-resistant layer and a high-energy plasma spraying prepared YSZ thermal barrier layer was prepared on titanium alloys surface.Then the heat insulation ability,burn resistant performance and the bonding strength were investigated.The experimental results showed that the interface between the coating and the matrix was typical metallurgical bonded,and the average bonding strength was 36.335 MPa;when the temperature of the flame on the one side of the specimen reached 600℃,the average insulated temperature of the coating samples was 70.67℃;when the flame temperature was 350℃,the titanium samples without the complex functional coatings were burned,while the samples with the coating showed great performance of burn resistant even when the temperature was 750℃.This indicates that the new functional coating has good heat-insulating and burn-resistant performance.
文摘为了评价农机入土部件材料的磨损性能,设计了一台磨损性能试验机,通过整体结构和关键部件设计实现了不同材质的旋耕刀/圆盘耙和犁铧部件在特定磨料条件下的磨损性能测试试验。利用ANSYS Workbench有限元分析软件对犁铧磨损试验系统的旋转十字架进行静力学分析,根据实际工况添加载荷和约束,分析得到旋转十字架的总变形和应力分布云图,验证了设计的合理性。基于Dyna Test Expert动态试验软件的测控系统实现试验转速、时长等参数的设置,以及试验结果的存储。