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不锈钢及精密合金的冷轧带,在连续炉退火时,必须保证表面光亮,其保护介质,过去都是采用纯氢及氨分解气体。本文对氮加氢取代纯氢及氨分解气体进行了探讨,尤其是对其含氢量进行了讨论和实验,使含氢量由75%降至20～30%,最后降到2%。文中以 Cr 为代表,应用平衡常数对钢的无氧化加热的条件进行了分析,并进行了含氢量对光亮效果影响的试验,以含氧≤10ppm,露点为-60℃以下,含氢只有2%的氮加氢气氛实现了不锈钢及精密合金冷轧带的连续式光亮热处理。
Stainless steel and precision alloy cold-rolled strip, continuous annealing furnace, you must ensure that the surface light, the protective medium, the past are pure hydrogen and ammonia decomposition gas. In this paper, nitrogen and hydrogen were substituted for pure hydrogen and ammonia decomposition gas, especially the hydrogen content was discussed and experimented, the hydrogen content was reduced from 75% to 20 ~ 30% and finally to 2%. In this paper, Cr as the representative, the application of equilibrium constant of steel oxidation-free heating conditions were analyzed and hydrogen content of the light effects of the test, with oxygen ≤ 10ppm, the dew point of -60 ℃ below the hydrogen-containing only A 2% nitrogen hydrogenation atmosphere enables continuous bright heat treatment of stainless steel and precision alloy cold rolled strip.