控轧控冷工艺在低锰（0.75%~0.85%）HRB400E 盘螺生产中的应用.pdfVIP

控轧控冷工艺在低锰（0.75%~0.85% ）HRB400E 盘螺生产中的应用 ·1 · 控轧控冷工艺在低锰 （0.75%~0.85% ）HRB400E 盘螺生产中的应用 马正洪 张玺成 钱 萍 （山西建邦集团轧钢厂，山西临汾 043400 ） 摘 要 利用高线控轧控冷技术轧制无微合金低锰（0.75%~0.85% ）细晶高强度 HRB400E 钢筋，轧制温度区间为 部分奥氏体未结晶区，阐述了在控轧控冷过程中温度与水冷控制对晶粒度尺寸的影响，轧后风冷对成品内部金相组 织构成的影响，通过抽样检测，表明控制加热温度在 995℃左右，进精轧温度 800℃左右，此工艺下生产的无微合 金低锰钢筋的晶粒尺寸已相当接近超细晶微合金化高强度钢筋的极值范围（5~10μm ）。经过理论分析结合现场实际 生产情况得到了无微合金低锰细晶高强度钢筋的最佳金相组织构成百分比，对于今后生产其他类型的特钢产品起到 了很好的借鉴作用。此项轧制细晶高强度钢筋的控制控冷技术是建立在无微合金的基础上的，属于国内一流水平， 同时每年可为公司创造近亿元的利润。 关键词 控轧控冷，无微合金化，细晶高强度，珠光体含量 The Application of Controlled Rolling and Cooling Process in Low Manganese (0.75%~0.85%) HRB400E Rebar Coil Production Ma Zhenghong, Zhang Xicheng, Qian Ping (Shanxi Jianbang Group , Linfen Shanxi 043400, China) Abstract Using TMCP of high-wire rolling to roll HRB400E rebar coil with no micro-alloy and lower Mn content(0.75%~0.85%) , rolling temperature range is not part of the austenite crystalline region, Analysised the effection about heating temperature and water cooling on the grain size, cooling effect on the microstructure of finished structure after rolling, Through sampling and testing, when controlled the heating temperature about 995 ℃ and the temperature into NTM about 800 ℃, no micro-alloy grain size of the low-manganese steel has been quite close to the ultrafine-grained micro-alloyed high strength steel extreme range (5 ~ 10μm). And through theoretical analysis combined with the practical production obtained the best microstructure without micro alloy low manganese fine grained high strength steel structure the percentage, to a very good reference for the future production of other types of steel products. This technology is