磨损活塞杆化学复合镀修复工艺

Teflon

磨损活塞杆化学复合镀修复工艺
陈名华 夏成宝 葛文军空军第一航空学院,河南信阳464000

摘　要:应用化学复合镀技术修复磨损的作动筒活塞杆，介绍了化学复合镀Ni—P—PTFE（聚四氟乙烯）镀液配方、修复工艺流程及工艺条件。讨论了温度、pH、搅拌方式对PTFE复合量的影响，获得了化学复合镀较佳的工艺条件：温度85～95℃，pH：4．8，机械搅拌10min、间歇1min。修复层测试结果表明，镀层厚度为20gm的修复件，其显微硬度为390HV，使用3个月后的磨损量为1-2g。修复件的使用寿命达到3年，满足用户要求。[著者文摘]

关键词:化学复合镀 镍磷合金 聚四氟乙烯 活塞杆 磨损 修复
分类号:　TQ153.12[著者标引]文献标识码：A文章编号：1004-227X（2010）11-0019-03栏目信息：化学镀
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Reparation process of worn piston rod by electroless composite platingCHEN Ming-hua, XIA Cheng-bao, GE Wen-jun The First Aeronautical Institute of the Air Force, Xinyang 464000, ChinaAbstract:The worn actuator piston rod was repaired by electroless composite plating. The bath formulation of electroless composite Ni-P-PTFE （polytetrafluoroethylene） plating, reparation process flow and technological conditions were introduced. The effects of temperature, pH and stirring method on the amount of PTFE incorporated were discussed. The optimal process conditions were obtained as follows： temperature 85-95 ℃, pH 4.8 and mechanical stirring 10 rain followed by intermission of 1 min. The test results of repaired deposits showed that the deposit with a thickness of 20 μm has a microhardness of 390 HV and its wear loss is 1.2 g after use for three months. The service life of workpiece after reparation is up to three years and thus meets users＇ requirements.[著者文摘]

Key words:electroless composite plating; nickel-phosphorus alloy; polytetrafluoroethylene; piston rod; wear; reparation