水轮机叶片表面聚氨酯弹性涂层的抗磨蚀性分析  

Abrasion Resistance Analysis of Spray Polyurethane Elastic Coating on Turbine Blades

作　　者：张瑞珠[1] 卢伟[1] 严大考[1] 黄荣浩 刘晓东[1] 

机构地区：[1]华北水利水电大学,郑州450011

出　　处：《表面技术》2014年第1期11-15,共5页Surface Technology

基　　金：河南省重点科技攻关项目(122102210241)~~

摘　　要：目的分析聚氨酯弹性涂层的抗磨蚀性机理，并研究其在水利工程表面防护中的应用。方法对水轮机叶片的气蚀磨损机理进行分析，采用Pu喷涂技术在水轮机叶片钢材（0Crl3NiSMo）上做一层聚氨酯弹性耐磨涂层，并对涂层的性能进行检测与分析。结果当聚氨酯组分的官能度为2．4时，聚氨酯弹性涂层表现出优异的综合力学性能，涂层与水轮机叶片间的物理结合力达到12．6MPa．涂层磨耗值保持在较低范围内（2～3mg／1000r）。结论聚氨酯弹性涂层能减缓含沙水流对水利工程中高速运转机械设备的冲刷磨损、空蚀破坏。延长水轮机叶片、水泵叶轮的使用寿命。Objective To analyze the abrasion resistance of polyurethane elastic coating and study its application in water con servancy engineering surface protection. Methods The cavitation erosion mechanism of the hydraulic turbine blade was analyzed, then a polyurethane elastomer wearresistant layer was coated onto the blade of hydraulic turbine（0Crl3NiSMo）using the PU spra ying technology and the performance of the coating was analyzed. Results When the functionality of polyurethane was 2.4, the Pol yurethane elastomers exhibited good mechanical performance, with the binding force between the coating and the turbine blades reaching up to 12.6 MPa and the coating wear value remaining at the lower end of the range of 2 3 mg/1000 r. Conclusion Elas tic polyurethane coating can reduce erosion wear and cavitation damage caused by sediment flow on highspeed operating machine and equipment of water conservancy projects, and thus extends the service life of the pump impeller and turbine blade.

关 键 词：聚氨酯涂层 水轮机叶片 抗磨蚀 微相分离 

分 类 号：TG174.46[金属学及工艺—金属表面处理]