工艺参数对电弧喷涂NiAl涂层孔隙率和显微硬度的影响
Effects of Spraying Process Parameters on Porosity and Microhardness of Arc-sprayed Ni-Al Coating
李汉运 1刘洋 2王博 3彭新 4王福德4
作者信息
- 1. 中国航发沈阳黎明航空发动机有限责任公司,辽宁 沈阳 110043
- 2. 鲁迅美术学院,辽宁 沈阳 110004
- 3. 中国航发沈阳黎明航空发动机有限责任公司,辽宁 沈阳 110043;北京航空航天大学 材料科学与工程学院,北京 100191
- 4. 空装驻沈阳地区第二军事代表室,辽宁 沈阳 110042
- 折叠
摘要
使用PRAXAIR-9935 设备通过电弧喷涂镍铝丝材得到镍铝涂层.采用正交试验设计方法探索电弧喷涂镍铝涂层孔隙率的变化规律,以获得最佳工艺参数;采用在线监测设备测量了不同实验条件下的焰流强度、粒子速度和温度.使用有能谱分析功能的扫描电子显微镜进行涂层成分和显微组织形貌分析,同时对涂层的硬度进行了测试.根据实验结果制定了最佳工艺参数值,喷涂电流 130 A、喷涂电压 33 V、雾化空气压力 0.4 MPa和喷涂距离 120 mm.结果表明,喷涂电压、电流、雾化空气压力和喷涂距离对孔隙率造成不同的影响.使用最佳工艺参数喷涂的镍铝涂层最小孔隙率可降低到 5.5%,涂层的组织呈现出典型的层状结构特征.
Abstract
The Ni-Al coating was sprayed by using an electric arc spray equipment with Ni-Al alloy wires.The porosity variations of Ni-Al coating were examined in a well-designed orthogonal test to attain an optimized spraying process.The intensity and velocity of the flame flow and particle temperature were detected by an online detection system.Morphologies and compositions of the Ni-Al coating were analyzed using a scanning electron microscope,and the microhardness was measured to optimize spraying parameters are as follows:electrical arc current of 130 A,voltage of 33 V and atomizing air pressure of 0.4 MPa,spraying distance of 120 mm.The results show that the spraying voltage,spraying current,atomizing air pressure and spray distance can induce different influence on the porosity of the Ni-Al coating.Under optimized spraying parameters,the minimum porosity of the Ni-Al coating can decrease to 5.5%and the coating shows the typical layer structure.
关键词
电弧喷涂/镍铝涂层/工艺参数/正交试验/孔隙率Key words
arc spraying/Ni-Al coating/process parameters/orthogonal test/porosity引用本文复制引用
出版年
2024
NETL
NSTL
万方数据