Mn含量及卷取温度对TSCR流程生产Ti微合金高强钢组织与力学性能的影响  

Effect of Mn content and coiling temperature on the microstructure and mechanical properties of Ti-microalloyed high-strength steel produced by TSCR process

作　　者：陈麒琳[1] 孙新军[2] 

机构地区：[1]武汉科技大学材料与冶金学院,湖北武汉430081 [2]钢铁研究总院工程用钢研究所,北京100081

出　　处：《武汉科技大学学报》2016年第3期161-165,共5页Journal of Wuhan University of Science and Technology

基　　金：中国博士后科学基金资助项目(2014M562072)

摘　　要：在TSCR流程上研究Mn含量和卷取温度对Ti微合金高强度钢组织与力学性能的影响。结果表明,随着钢中Mn含量的升高,铸坯与热轧成品板组织细化,其强度显著提高;而卷取温度的降低虽使热轧板组织得到细化,但抑制了纳米尺寸含Ti相的充分析出,热轧板强度降低。由此可见,在细化组织的同时提高纳米尺寸析出物数量是生产Ti微合金化高强钢的关键所在。The effects of Mn content and coiling temperature on the microstructures and mechanical properties of Ti-microalloyed high strength steel produced by TSCR process were investigated.The results show that higher Mn content causes finer microstructures for the continuous casting slab and hot-rolled plate,and raises the strength of Ti-microalloyed steel dramatically.On the other hand,lower coiling temperature causes finer microstructure for the hot-rolled plate;however,the full precipitation of nanometer-sized Ti-contained phases will be inhibited,and the overall strength of steel is decreased as a result.Hence,both the grain refinement and the increase of the amount of nanosized precipitates are crucial to the production of Ti-microalloyed high strength steel.

关 键 词：薄板坯连铸连轧 TI微合金钢 Mn 卷取温度 微观组织 力学性能 

分 类 号：TG113.25[金属学及工艺—物理冶金]