镍基高温合金DZ125激光再铸层化学研磨的实验研究
发布时间：2019-05-25 01:12
【摘要】：研究了镍基高温合金DZ125激光再铸层组织特征、电化学腐蚀行为,并分析了再铸层化学研磨的优化条件,测试了研磨后基体的热疲劳性能。研究发现,DZ125合金激光再铸层主要为枝晶结构,且强化相γ′相析出较少,激光再铸层的耐腐蚀性能明显弱于DZ125合金基体。化学研磨溶液保温在60℃以上、浓度在90%以上时,再铸层的化学研磨高效可靠,研磨后基体表面光滑,无明显腐蚀发生,且基体的热疲劳性能得到明显改善。
[Abstract]:The microstructure and electrochemical corrosion behavior of laser recasting layer of nickel-base superalloy DZ125 were studied, and the optimum conditions of chemical grinding of recasting layer were analyzed, and the thermal fatigue properties of the matrix after grinding were tested. It is found that the laser casting layer of DZ125 alloy is mainly dendritic structure, and the precipitation of strengthened phase 纬 'phase is less, and the corrosion resistance of laser recasting layer is obviously weaker than that of DZ125 alloy matrix. When the chemical grinding solution is kept above 60 鈩，
本文编号：2485358
[Abstract]:The microstructure and electrochemical corrosion behavior of laser recasting layer of nickel-base superalloy DZ125 were studied, and the optimum conditions of chemical grinding of recasting layer were analyzed, and the thermal fatigue properties of the matrix after grinding were tested. It is found that the laser casting layer of DZ125 alloy is mainly dendritic structure, and the precipitation of strengthened phase 纬 'phase is less, and the corrosion resistance of laser recasting layer is obviously weaker than that of DZ125 alloy matrix. When the chemical grinding solution is kept above 60 鈩，
本文编号：2485358
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