金属密封件镀金工艺研究

介绍了金属密封件镀金工艺技术,该工艺采用亚硫酸盐镀金方案,以单脉冲电源为镀覆电源,以预镀镍层为中间镀层来制备金镀层,得到了结晶细致、厚度均匀并与基体上结合牢固的金镀层.研究了金镀层的沉积速率和结合强度,观察了镀层的表面形貌和组织结构,进行了金属密封件气密性试验和典型试验.结果表明：金属密封件金镀层的技术性能指标满足设计要求,能够应用于液体火箭发动机中,该发动机已通过地面热试车考核.

Gold plating technology of metal seal

The gold plating technology of gliding metal seal is introduced in this paper. The sulfite gold plating scheme is adopted in the technology. The gold plating layer with detailed crystal, uniform thickness and firm bonding was obtainedby taking the single pulse power supply as the plating power supply, and the nickel pre-plating layer as an intermediate to prepare gold plating layer. The gold plating deposition rate and bond strength are analyzed in this paper. The surface morphology of the coating and the organizational, structure were observed. Metal seal tightness and typical test results show that the technical performance indicators of the metal seal gold plating layer can meet the design requirement and can be applied to liquid rocker engine. The engine with the metal seal gold plating layer has passed ground hot commissioning assessment.