本文選題：材料失效與保護(hù)　切入點(diǎn)：低壓電弧等離子體滲氮　出處：《材料研究學(xué)報(bào)》2017年02期 　論文類型：期刊論文

【摘要】：在低溫下對316奧氏體不銹鋼進(jìn)行低壓電弧等離子體滲氮處理,研究了滲氮處理對不銹鋼耐腐蝕性能的影響。結(jié)果表明:滲氮層有兩個(gè)子層,由納米晶擴(kuò)張奧氏體和少量的Cr N化合物組成的外表層和單一結(jié)構(gòu)的擴(kuò)張奧氏體內(nèi)層。由于低壓電弧等離子體濃度高,在400℃滲氮1 h得到的滲氮層厚度達(dá)到15μm,表現(xiàn)出很高的滲氮速率。納米晶外表層是滲氮不銹鋼耐腐蝕性能的關(guān)鍵,促進(jìn)了鈍化膜的生成,滲氮后試樣表面形成的鈍化膜厚度達(dá)到27 nm,比原始不銹鋼鈍化膜的2倍還多。滲氮不銹鋼試樣的腐蝕電流(3.55×10~(-8)A/cm~2)比基材的腐蝕電流(1.99×10~(-7)A/cm~2)降低一個(gè)數(shù)量級,表明滲氮后試樣的耐腐蝕性能提高了。
[Abstract]:Low pressure arc plasma nitriding treatment was carried out on 316 austenitic stainless steel at low temperature. The effect of nitriding treatment on corrosion resistance of 316 austenitic stainless steel was studied. The results show that the nitriding layer has two sub-layers. The outer layer consisting of nanocrystalline expanded austenite and a small amount of Cr N compounds and the inner layer of expanded austenite with a single structure. Due to the high concentration of low pressure arc plasma, The nitriding layer thickness reached 15 渭 m at 400 鈩，

本文編號：1612374