本文選題：高鋁鋼 + Fe-Cr-Al鋼��； 參考：《材料熱處理學(xué)報》2017年01期

【摘要】：研究了Fe-Cr-Al-Si輕質(zhì)耐熱鋼的組織結(jié)構(gòu)及抗氧化性能,結(jié)果表明:鑄態(tài)的Fe-9Cr-5Al-0.5Si-0.02N-0.03C鋼的晶粒直徑達(dá)到0.5 mm,晶粒粗大的原因主要是原子擴(kuò)散系數(shù)大,晶粒長大速度大,又沒有奧氏體鐵素體相變的細(xì)化晶粒作用。鋼在800℃的空氣中平均氧化速率為0.0685 g·h~(-1)·m~(-2),達(dá)到了完全抗氧化級別;隨著氧化溫度增加,鋼的表面氧化膜由Fe、Al、Cr的化合物、低價態(tài)氧化物轉(zhuǎn)變?yōu)橐訟l_2O_3為主的高價態(tài)氧化物;氧化膜中Fe_2O_3呈圓圈層規(guī)則排列在島狀的Al_2O_3組織上,是由于在高溫下鐵、鋁、氧的復(fù)雜的氧化還原反應(yīng)造成的。
[Abstract]:The microstructure and oxidation resistance of Fe-Cr-Al-Si light weight heat-resistant steel were studied. The results showed that the grain diameter of Fe-9Cr-5Al-0.5Si-0.02N-0.03C steel was 0.5 mm. The main reason for the coarse grain size was that the atomic diffusion coefficient was large and the grain growth speed was large. There is no effect of austenitic ferrite transformation on grain refinement. The average oxidation rate of the steel in air at 800 鈩，

本文編號：2019542