本文關(guān)鍵詞：超超臨界機組鍋爐過熱器用T92鋼高溫腐蝕試驗　出處：《熱力發(fā)電》2017年11期 　論文類型：期刊論文

  更多相關(guān)文章： T鋼 應(yīng)力 過熱器 高溫腐蝕 復(fù)合硫酸鹽 蒸發(fā) 涂鹽試驗 腐蝕動力學(xué)

【摘要】：以超超臨界機組鍋爐高溫過熱器用耐熱鋼T92為研究對象,考慮了過熱器工作過程中的應(yīng)力因素,采取螺栓預(yù)緊方式對C型試樣施加應(yīng)力,然后涂鹽進行高溫腐蝕試驗。結(jié)果表明:700℃下復(fù)合硫酸鹽的熔融與揮發(fā)在一定程度上影響了T92鋼涂鹽試樣的高溫腐蝕行為;未加載應(yīng)力時,700℃下T92鋼腐蝕以高溫氧化為主;加載應(yīng)力時,700℃下應(yīng)力能加快涂鹽T92鋼的腐蝕速度。對于大型鍋爐過熱器的T92鋼管道,運行過程中需注意其應(yīng)力變化對高溫作業(yè)的影響。
[Abstract]:Taking heat-resistant steel T92 for boiler superheater of ultra-supercritical unit as the research object, the stress factors during the working process of superheater were considered, and the stress was applied to C type specimen by bolt pre-tightening method. The results showed that the melting and volatilization of composite sulfate affected the corrosion behavior of T92 steel at high temperature to some extent. The corrosion of T92 steel at 700 鈩，

本文編號：1406624