Abstract：The thrust foil bearing is an important support element in the aviation gyroscope. In order to improve the wear resistance and corrosion resistance of the supporting surface, Teflon coating is usually coated on the supporting surface, while the addition of this coating brings uncertainty to the subsequent manufacturing process. In this paper, the effects of laser spot welding process parameters on the microstructure and performance of thrust foil bearing joints were studied. The analysis methods such as optical microscope, scanning electron microscope, electronic precision tensile tester and ultrasonic testing were used to analyze the weld surface forming, joint microstructure and mechanical properties. The results showed that the surface diameter of joint increased with the increase of pulse power, while the tensile shear force increased first and then decreased with the increase of heat input. The optimized process parameters of laser spot welding manufacture: pulse power percentage 22%, pulse width 5.0ms, tensile shear force 63.0N; Ultrasonic immersion testing can accurately measure the size of the lap interface, but the tensile shear force was not fully proportional to the size of the interface. The tensile shear force of the joint was mainly related to the fracture modes of the joint.
汪芦婷，罗欣洋，王善林，陈玉华，黄永德 . 激光点焊工艺参数对止推箔片轴承接头组织与性能的影响[J]. 航空制造技术, 2020, 63(11): 56-61.
WANG Luting,LUO Xinyang,WANG Shanlin,CHEN Yuhua,HUANG Yongde. Effects of Process Parameters on Microstructure and Performance of Joints for Laser Spot Welding of Thrust Foil Bearings. Aeronautical Manufacturing Technology, 2020, 63(11): 56-61.
2020, 
