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提出了高炉铁水双辊连铸薄带+高温气固反应脱碳生产钢带的全新工艺流程。试验以Ar-H_2-H_2O为脱碳气氛,在可控气氛管式炉内对Fe-C合金薄带进行脱碳。通过正交试验方法,研究了不同水浴温度(40~60℃)、脱碳时间(5~50 min)和脱碳温度(920~1 140℃)对脱碳效果的影响。研究结果表明,升高脱碳温度、水浴温度和延长脱碳时间均有利于合金薄带的脱碳,其中脱碳温度的影响最为显著,其次为脱碳时间,水浴温度对脱碳效果的影响最小。碳质量分数为4.05%,厚度分别为2.0、1.0、0.5 mm的薄带,在水浴温度为60℃时,1 140℃下固态脱碳25 min,薄带平均碳质量分数分别降至1.12%、0.41%和0.017%,证明了碳铁碳合金在可控气氛下通过气固反应脱碳生产中低碳钢带技术上可行。
A new process of producing strip by blast furnace hot metal twin-roll continuous casting strip + high temperature gas-solid reaction decarbonization was proposed. The experiment decarburized the Fe-C alloy ribbons in a controlled atmosphere tube furnace with Ar-H 2 -H 2 O as the decarburization atmosphere. The influence of different water bath temperature (40 ~ 60 ℃), decarburization time (5 ~ 50 min) and decarburization temperature (920 ~ 1 140 ℃) on the decarburization effect was studied by orthogonal test. The results show that the higher decarburization temperature, the bath temperature and the longer decarburization time all contribute to the decarburization of the alloy strip, and the effect of decarburization temperature is the most significant, followed by decarburization time and water bath temperature on the decarburization effect Min. The mass fraction of carbon is 4.05% and the thickness is 2.0, 1.0 and 0.5 mm respectively. When the temperature of the water bath is 60 ℃, the solid state is decarburized at 140 ℃ for 25 min, the average carbon mass fraction of the strip decreases to 1.12% 0.41% and 0.017% respectively, which proves that it is technically feasible for carbon-carbon-carbon alloy to produce medium and low carbon steel strip through gas-solid reaction decarburization in a controlled atmosphere.