摘要
为降低Q345C钢中的Mn含量,拟通过加大控冷过程中的水量,实现晶粒的细化来提高钢的强度。为此,计算了不同化学成分Q345C钢的CCT曲线,为制定冷却工艺提供参考;并用经验公式对钢的强度进行了估算。同时对试验钢(Mn质量分数从1.4%降至1.2%)进行了控轧控冷试验,终冷温度从630℃降至580℃,并对其组织性能进行了分析。结果表明:试验钢组织为铁素体+珠光体+少量贝氏体,强度满足标准要求。
To reduce the content of Mn in Q345C steel, the amount of water in controlled cooling process was increased to achieve refinement grain and higher strength. Therefore, the CCT curves of different chemical composition Q345C steels were calculated. It was the reference to design cooling process. The steel strengths of the designed composition were calculated by the empirical formula. Based on these, the controlled cooling experiment was carried out by the tested steel which Mn content was reducted from 1.4% to 1.2%,and the finishing cooling temperature was reduced from 630 ℃ to 580 ℃. The microstructure and properties of the tested steel were analysed. The microstructure of tested steel was F＋P＋B（a few）, and its strength could meet the re- quirement.
出处
《轧钢》
2017年第2期10-13,共4页
Steel Rolling
关键词
合金减量化
TMCP
控冷
组织
强度
alloyment reduction
TMCP
controlled cooling
microstructure
strength
