The optimization of nitrogen control technology for automobile beam steel
Nitrogen element is a harmful element in steel,its content is too high will deterioration of hot rolling and cold rolling performance of steel,reduce the plastic toughness of steel,and even reduce the timeliness of steel or cause blue brittleness,serious may lead to processing cracking.And nitrogen content is easy to react with titanium in steel,reduce the effective titanium,affecting the performance of steel.This paper introduced the change of nitro-gen content in the whole process of industrial production,analyzed the main factors of nitrogen content increase in steel,and made rectification measures.By clarifying the standard of raw materials in the converter such as molten i-ron,lime and alloy,optimizing the converter blow gun position and post-furnace deoxidation process,and impro-ving the submerged arc effect of refining,we could stably control the finished nitrogen content of beam steel≤45ppm and the pass rate reaching 95%.
万方数据
维普
