300M钢刷镀镉性能及在某型飞机起落架修理中的应用

Performance of Electric-brush Plating Cadmium on 300M Steel and Application in Landing Gear Repair for a Certain Type of Aircraft

目的研究刷镀镉工艺在300M钢起落架的工程应用和镀层性能。方法采用两种不同的刷镀镉溶液在300M钢表面实现外观质量良好的电刷镀镉层,利用扫描电镜、盐雾箱及力学拉伸机等对镀层显微组织、厚度、结合力、耐腐蚀性能和氢脆性能进行测试,并对起落架零件电刷镀修复进行工艺应用研究。结果选用的两种镀液均可在300M表面获得质量稳定,厚度、结合力符合技术要求的电刷镀镉层。该镀层中性盐雾性能超过500 h,氢脆性能合格。结论刷镀镉工艺可成功应用于某型机起落架零件电镀镉钛镀层的修复。

Objective To investigate the engineering application and coating performance about technology of brush cadmium plating of 300 M steel in the undercarriage. Methods Cadmium coating with good appearance quality was obtained with two different kinds of brush cadmium plating solutions. The microstructure, thickness, binding force,corrosion resistance, property against hydrogen embrittlement of the cadmium coating were tested by SEM, salt-fog cabinet, mechanics experimental machine and so on. Application study of this technology in brushing electroplating of the undercarriage parts. Results Both of the electroplating solutions used could obtain cadmium coatings with stable quality as well as thickness and bonding force that met the technical requirements on the surface of 300 M. The neutral salt spray performance of the cadmium coating was over 500 hours, and the property against hydrogen embrittlement was also qualified. Conclusion The technology of brush cadmium plating can be successfully used in repair of undercarriage parts for a certain type of aircraft.