Research on Microstructure and Mechanical Properties of High Strength Steel

2nd International Conference on Frontiers of Materials Synthesis and Processing

Zhu, Pengxiao^1^2 ; Li, Yi^1^2 ; Feng, Kun^1^2 ; Wang, Xiaoming^3 ; Fan, Huiji^1^2

State Key Laboratory of Intelligent Manufacturing of Advanced Construction Machinery, Xuzhou Construction Machinery Group, Xuzhou

221004, China^1

Jiangsu Xuzhou Construction Machinery Research Institute, Xuzhou Construction Machinery Group, Xuzhou

221004, China^2

XCMG Earth Moving Machinery Business Unit, Xuzhou

221004, China^3

关键词: Brinell hardness;    Fatigue strength;    Ferrite-pearlite;    Impact energy;    Impact fracture;    Internal microstructure;    Microstructure and mechanical properties;    Microstructure and properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/493/1/012147/pdf
DOI  :  10.1088/1757-899X/493/1/012147

来源: IOP

【 摘 要 】

The microstructure and properties of Q460C high strength steel were studied in this paper. The results show that the margin microstructure of the test steel Q460C is banded ferrite pearlite. The internal microstructure is banded ferrite pearlite bainite, the grade of banded microstructure is 2.5. The tensile strength, yield strength, post-fracture elongation and Brinell hardness of Q460C steel are 620MPa, 502MPa, 22% and 175HBW10/3000 respectively. The impact energy of-40°C is above 50J, and a large number of equiaxed dimples are evenly distributed in the impact fracture. The conditional fatigue strength of test steel Q460C under 107 is 250MPa.