本文選題：高速電弧噴涂 + 鎳基合金��； 參考：《焊接學(xué)報(bào)》2017年04期

【摘要】：采用高速電弧噴涂技術(shù)在20G鋼基體表面制備三種鉻含量不同的鎳基合金涂層.光學(xué)顯微鏡、X射線衍射、掃描電鏡和能譜分析等技術(shù)對涂層微觀組織結(jié)構(gòu)、相組成及成分進(jìn)行分析.選用摩爾比為7∶3的Na_2SO_4+K_2SO_4水溶液涂敷刷在涂層表面,分析涂層在650℃下的抗熱腐蝕性能.結(jié)果表明,涂層的腐蝕動力學(xué)曲線基本符合拋物線規(guī)律;四種涂層表面均形成了致密連續(xù)的NiO和Cr_2O_3保護(hù)膜.隨著鉻含量升高,涂層表面氧化膜中Cr_2O_3含量升高,NiO逐漸減少,涂層抗熱腐蝕性能明顯提高.Ni-30Cr,Ni-45Cr,Ni-50Cr涂層抗熱腐蝕性能分別為20G鋼基體的10,15和20倍;Ni-50Cr涂層抗腐蝕性能是美國Tafa 45CT材料的1.4倍.
[Abstract]:Three kinds of nickel based alloy coatings with different chromium content were prepared on 20G steel substrate by high speed arc spraying. The microstructure, phase composition and composition of the coating were analyzed by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. The thermal corrosion resistance of the coating was analyzed at 650 鈩，

本文編號：2076526