摘要
研究了开冷温度、终冷温度和轧制工艺对低碳高锰建筑钢板常温拉伸性能、-40℃冲击功、屈强比和显微组织的影响,分析了工艺参数与性能之间的关系和作用机理。结果表明,随着开冷温度的降低,屈强强度、抗拉强度和-40℃冲击功逐渐降低,而断后伸长率逐渐增加,适当降低开冷温度有助于降低材料的屈强比;随着终冷温度的降低,屈服强度和抗拉强度逐渐升高,而断后伸长率和-40℃冲击功逐渐减小,屈强比上升。试验钢具有较高强塑性的同时具有较低的屈强比,主要与组织中相对软的贝氏体铁素体和较硬的M-A岛复相组织以及晶粒尺寸有关。
The effects of starting cooling temperature, final cooling temperature and rolling process on the tensile properties,impact work at-40℃, yield ratio and microstructure of the low carbon and high manganese building steel plate were studied. The relationship between process parameters and properties and the mechanism of action were analyzed. The results show that with the decrease of starting cooling temperature, the yield strength, tensile strength and impact work at-40℃gradually decrease, but the elongation after fracture increases gradually. Properly decreasing starting cooling temperature is helpful to reduce the yield ratio of the material. With the decrease of the final cooling temperature, the yield strength and tensile strength gradually increase, while the elongation after fracture and the impact work at-40 ℃ gradually decrease, and the yield strength ratio increases. The test steel has high ductility and low yield ratio, Which is mainly related to the relatively soft bainitic ferrite in the microstructure and the hard M-A island multiphase microstructure as well as the grain size.
作者
王锋
WANG Feng(School of Engineering and Technology, Chengdu University of Technology, Leshan 614000, China)
出处
《热加工工艺》
CSCD
北大核心
2018年第11期124-127,共4页
Hot Working Technology
基金
四川省教育厅科研项目(17ZB0064)
成都理工大学青年基金项目(C122016021)
成都理工大学院级教研教改项目(2016-YY-JG10)
关键词
抗震钢板
控轧控冷
工艺参数
显微组织
力学性能
aseismatic steel plate
controlled rolling and controlled cooling
process parameters
microstructure
mechanical properties
