材料期刊网

通过系统的实验室研究、中试工场热轧试验和工业生产热轧试验,成功实现了热连轧细晶粒系列C-Mn钢的工业化生产。利用变形诱导铁素体相变（DIFT）机制和变形后快速冷却工艺,在w（[Mn]）为0.2%～0.7%的低碳（w（[C]）为0.13%～0.17%）钢中获得了细晶粒多边形铁素体（PF）＋珠光体（P）＋贝氏体（B）组织。使用奥氏体未再结晶区终轧和快速冷却工艺路线在高锰钢（w（[C]）为0.13%～0.17%,w（[Mn]）为1.5%）中得到了PF＋B组织。在1450mm热带钢连轧生产线上,批量生产出厚度4.0～5.5mm细晶粒热轧板卷。

Industrial mass production was conducted for hot-rolled plain carbon-manganese strip steels with fine-grained microstructure based on systematic studies in laboratory,test-plant rolling trials and a series of industrial rolling trials.The mechanism of deformation-induced-ferrite-transformation（DIFT） is utilized during finish rolling and lamellar water flow cooling employed on run-out table to form fine-grained ferrite microstructure consisting of PF＋P＋B in manganese containing（w（[C]） is 0.13%-0.17%,w（） is 0.2%-0.7%） low carbon steels.The technical approach to produce fine-grained microstructure consisting of PF＋B in low carbon high manganese（w（[C]） is 0.13%-0.17%,w（） is 1.5%） containing steels is featured by conventional finish controlled-rolling in non-recrystallized austenite region followed by the same accelerated cooling as the case for low manganese containing steels.Fine-grained hot rolled strip steels with thickness at 4.0-5.5 mm have been produced with a 1 450 mm hot strip mill.