论文部分内容阅读
利用超低碳和微合金化的成分设计,采用TMCP工艺,充分利用晶粒细化和针状铁素体与粒状贝氏体组织强化、下线堆垛缓冷24h等手段,保证热轧状态达到该钢种需要的屈服强度、伸长率,进而去掉热处理调质及回火工艺,同样在工业试制条件下得到韧性良好、屈服强度为570 MPa级的超低碳贝氏体钢。
The use of ultra-low carbon and micro-alloying of the composition design, the use of TMCP process, make full use of grain refinement and acicular ferrite and granular bainite strengthening, slow down stack stacking 24h means to ensure that the hot-rolled state To achieve the required yield strength of the steel, elongation, and then remove the heat treatment tempering and tempering process, also under the conditions of industrial trials to obtain good toughness, yield strength of 570 MPa-class ultra-low carbon bainitic steel.