Effect of Cold and Hot Compounds Forming on Microstructures and Mechanical Properties in the Deformation Zone of Sharp-Edged High-Strength Steel Sections

Wenqiu Yao; Jingtao Han; Chunjing Wu; Zhongqian Cao

doi:10.3390/ma16176001

Effect of Cold and Hot Compounds Forming on Microstructures and Mechanical Properties in the Deformation Zone of Sharp-Edged High-Strength Steel Sections

Materials (Basel). 2023 Aug 31;16(17):6001. doi: 10.3390/ma16176001.

Authors

Wenqiu Yao¹, Jingtao Han^{1

2}, Chunjing Wu¹, Zhongqian Cao¹

Affiliations

¹ Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China.
² Guangzhou Sino Precision Steel Tube Industry Research Institute Co., Ltd., Guangzhou 511300, China.

Abstract

We researched the cold and hot composite-forming process, setting the forming speed at 2 m/min, the induction heating frequency at 40 KHz, and the induction current at 3000 A, and manufactured curtain wall steel with sharp corners. We analyzed the microstructure and mechanical properties of the deformation zone of the sharp-edged section using a tensile test, impact test analysis, metallographic observation (OM), fracture morphology observation, and electron backscatter diffraction (EBSD) analysis. The results show that the formed profile had a 96% reduction in the radius of the outer fillet and a 76% increase in the thickness of the corner compared to the pre-formed shape. The tensile strength increased by 3.6%, and the elongation after break increased by 13%. A forming temperature of 850 °C and forming deformation of 70% were determined as the optimum process parameters.

Keywords: cold and hot compound forming; high-strength low-alloy structural steel; roll forming.

Grants and funding

This research received no external funding.