论文部分内容阅读
研究了不同保护气氛(H2、N2)退火对ER80S-1CM热轧盘条表面氧化皮成分及结构的影响。热轧态盘条氧化皮结构致密、总厚度约10μm,中间层及最内层合金元素富集;H_2保护退火后最外层及大部分次外层氧化皮被还原为疏松多孔的金属铁,氧化皮总厚度约13μm,盘条基体表层出现厚度为4~6μm的“氧化前沿”;N_2保护退火后氧化皮结构致密,与基体附着力强,总厚度增加至14~22μm,盘条基体被进一步氧化,且基体表层出现厚度为4~9μm的“氧化前沿”。两种保护气氛退火后盘条表面氧化皮的成分及结构不同,H_2保护退火的氧化皮疏松多孔可用机械剥离法清除,而N_2保护退火的氧化皮与基体附着力强很难用该法除净。
The effects of different protective atmosphere (H2, N2) annealing on the composition and structure of the oxide scale on ER80S-1CM hot-rolled wire rod were studied. The hot rolled wire rod has a dense oxide scale with a total thickness of about 10 μm and the middle and innermost layers of the alloy are enriched. The outermost layer and most of the sub-outer layers of the oxide layer after H_2 protection annealing are reduced to loose porous metallic iron, The total thickness of the oxide scale is about 13μm, and the “oxidation front” with a thickness of 4 ~ 6μm appears on the surface of the wire rod substrate; the oxide scale structure is dense after N_2 protection annealing and has strong adhesion with the matrix, the total thickness is increased to 14-22μm, The substrate is further oxidized, and the “oxidation front” with a thickness of 4 ~ 9μm appears on the surface of the substrate. The composition and structure of the oxide scale on the surface of the wire rod after annealing are different. The loosely porous H 2 annealed annealing can be removed by mechanical stripping method. However, the strong adhesion of the N 2 annealed oxide scale to the substrate is difficult to remove by this method .