激光-TIG电弧复合热源熔覆Ni基合金组织与性能的研究  

Study on Microstructure And Properties of Nickel Base Alloy Surfacing Layer By Diode Laser-TIG Cladding

作　　者：李正秋 石玗[2] 张淑婷[1,3,4] 杜开平[1,3,4] 

机构地区：[1]北京矿冶研究总院,北京100070 [2]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州730050 [3]特种涂层材料与技术北京市重点实验室,北京102206 [4]北京市工业部件表面强化与修复工程技术研究中心,北京102206

出　　处：《热喷涂技术》2017年第4期67-71,76,共6页Thermal Spray Technology

基　　金：国家重点研发计划资助(项目编号2017YFB0306100)

摘　　要：研究了半导体激光与TIG电弧复合热源在Q235基体上熔覆Ni60金属粉末熔覆层的宏观形貌、微观组织、显微硬度、耐磨性、耐腐蚀性等性能。研究表明激光-TIG电弧复合热源熔覆中,引入电弧可以显著降低所需激光功率并得到与大功率激光熔覆层相近的宏观形貌,同时复合热源熔覆层具有较好边缘铺展性;复合热源中电弧功率不变,随着激光功率的增加,熔覆层中枝晶尺寸变大,同时Cr的析出物数量减少、尺寸增加且分布趋向不均匀,这导致熔覆层的显微硬度、耐磨性、耐腐蚀性均降低。Study on the macroscopic morphology, micro-structure micro-hardness, abrasive resistance and corrosion resistance of the Q235 which surfaced by Ni60 powder with laser-TIG cl adding. The study shows the layer of diode laser-TIG cladding can get the same macroscopic morphology as the layer of diode laser which has bigger power by using a smaller power compound with arc of TIG, in addition, the layer has a better spreadability of margin. Keep the TIG power invariant in hybrid heat source, with the increase of laser power, dendrite size increases and the educts of layer are getting decreasing, the size increases , and maldistribution,lead to micro-hardness, abrasive resistance and corrosion resistance are getting decreasing in the meantime.

关 键 词：激光-TIG复合热源 堆焊 微观组织 性能 

分 类 号：TG174.442[金属学及工艺—金属表面处理]