高强度螺栓激光表面强化工艺及性能研究  

Study on Laser Surface Strengthening Technology and Properties of High Strength Bolt

作　　者：夏传帮 周震宇 吴德智 林洲游 金杨福 Xia Chuanbang;Zhou Zhenyu;Wu Dezhi;Lin Zhouyou;Jin Yangfu(State Grid Wenzhou Power Supply Company,Wenzhou 325000,Zhejiang,China;College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou 310014,Zhejiang,China)

机构地区：[1]国网浙江省电力有限公司温州供电公司,浙江温州32500 [2]浙江工业大学材料科学与工程学院,浙江杭州310014

出　　处：《应用激光》2023年第12期116-123,共8页Applied Laser

基　　金：国网浙江省电力有限公司科技项目资助(5211WZ2000X3)。

摘　　要：我国温州沿海地区风力资源丰富,在发展风电新能源方面具有天然优势,然而温州电网的安全运行却受到当地强台风、沿海地区高湿度及高盐度等不良气候环境的影响,螺栓及线路金具在服役过程中发生过早失效。故对螺栓进行激光表面强化处理,改善材料的耐磨损性能,并对激光处理后材料的组织、硬度、耐磨损性能及冲击韧性进行分析。结果表明,激光强化层组织为针状及板条状的马氏体组织,深度最高为1 mm。激光强化后螺栓的耐磨损性能明显提高,与未强化螺栓相比,激光强化螺栓的失重量下降了95.37%,磨损深度下降了91.37%。未强化材料的冲击韧性为89 J,激光强化后材料的冲击韧性略微下降至75 J,但仍符合相关标准要求。Wenzhou coastal area is rich in wind resources and has natural advantages in the development of wind power new energy.However,the safe operation of Wenzhou power grid is affected by local strong typhoon,high humidity and high salinity in coastal areas and other adverse climate environment.Bolts and wire fittings fail prematurely in the service process.Therefore,the bolt was treated with laser surface strengthening to improve the wear resistance of the material,and the structure,hardness,wear resistance and impact toughness of the material after laser treatment were analyzed.The results show that the microstructure of laser enhanced layer is acicular and lath martensite with the maximum depth of 1 mm.The wear resistance of laser strengthened bolts is improved obviously.Compared with unstrengthened bolts,the weight loss and wear depth of laser strengthened bolts are decreased by 95.37%and 91.37%respectively.The impact toughness of the unreinforced material is 89 J/cm^(2),while the impact toughness of the laser reinforced material is slightly reduced to 75 J/cm^(2).The impact toughness of laser reinforced materials still meets the requirements of relevant standards.

关 键 词：螺栓 激光淬火 磨损 冲击韧性 

分 类 号：TG115.21[金属学及工艺—物理冶金] TG115.51[金属学及工艺—金属学] TG115.58