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对Q235钢在650℃×1.5 h条件下进行O-N-C共渗处理,添加剂以(分别为60～70滴/min和150～160滴/min)液体滴注和气体形式入炉,探索了添加剂加入方式对O-N-C共渗后渗层的厚度及组织、显微硬度、相组成、中性盐雾腐蚀和电化学特性的影响。结果表明,添加剂以液体滴注和气体入炉方式,经O-N-C共渗处理后渗层中化合物层厚度可达60～80μm,总渗层厚度达360～400μm。渗层最高硬度可达550～600 HV0.05。渗层主要由Fe3N、Fe2O3和Fe3O4组成。经O-N-C共渗处理的Q235钢中性盐雾腐蚀试验耐蚀性能大幅提高。渗层电化学自腐蚀电位正移100～230 mV。
ONC co-permeation was performed on Q235 steel at 650 ℃ × 1.5 h. Additives were dropped into the furnace with liquid drops (60-70 drops / min and 150-160 drops / min, respectively) and gas forms, and the addition of additives On the thickness and microstructure, microhardness, phase composition, neutral salt spray corrosion and electrochemical properties of the infiltrated layer after ONC infiltration. The results show that the additives can be dripped into the furnace and infiltrated into the furnace. After the O-N-C co-infiltration treatment, the thickness of the compound layer in the layer can reach 60-80 μm and the total thickness of the layer can reach 360-400 μm. Layer maximum hardness up to 550 ~ 600 HV0.05. The infiltration layer mainly consists of Fe3N, Fe2O3 and Fe3O4. Q235 steel by O-N-C co-infiltration salt spray corrosion test substantially improved corrosion resistance. The electrochemical corrosion potential of the layer is shifted by 100 ~ 230 mV.