Effect of controlled rolling and cooling process on microstructure and properties of X65 pipeline steel

2019 International Conference on Advanced Electronic Materials, Computers and Materials Engineering

无线电电子学;计算机科学;材料科学

Zhang, Hai^1^2 ; Li, Shaopo^1 ; Hao, Ning^1 ; Li, Zhangjun^1

Research Institute of Technology, Shougang Group Corporation, Beijing

100043, China^1

Beijing Engineering Research Center of Energy Steel, Beijing

100043, China^2

关键词: Controlled cooling process;    Controlled rolling and cooling;    Crack initiation energy;    Crack propagation energy;    Metallographic microscope;    Microstructure and properties;    Strength and toughness;    X65 pipe-line steel;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/563/2/022053/pdf
DOI  :  10.1088/1757-899X/563/2/022053

来源: IOP

【 摘 要 】

Effect of rolling and cooling process on microstructure and properties of X65 pipeline steel was studied by means of tensile test at room temperature, oscilloscopic impact test and metallographic microscope. And the impact fracture process of samples with different microstructures was analyzed by oscillographic impact curve. The results indicate that controlled cooling process has important influence on the microstructure of the sample. The strength and toughness of sample with acicular ferrite microstructure are better than this with ferrite and pearlite microstructure. The crack initiation energy of the acicular ferrite microstructure is similar to that of ferrite and pearlite microstructure. However the crack propagation energy of the acicular ferrite microstructure is different from that of ferrite and pearlite microstructure.