Experimental study on mechanical properties and microstructure of PERFORM 700 steel butt-welding joints using in high load-bearing structures

  • Tuan Anh Phung Le Quy Don Technical University, Hanoi, Vietnam
  • Quoc Hoang Pham Le Quy Don Technical University, Hanoi, Vietnam
  • Duc Manh Dinh Le Quy Don Technical University, Hanoi, Vietnam
  • Hong Phong Nguyen Le Quy Don Technical University, Hanoi, Vietnam
  • Xuan Hung Le Le Quy Don Technical University, Hanoi, Vietnam
  • Ngoc Tan Nguyen Hong Ha Shipbuilding Company/General Department of Defense Industry
  • Van Thuong Luc National Key Laboratory for Welding and Surface Treatment Technology (KEYLABWS)/ National Research Institute of Mechanical Engineering (NARIME)
Keywords: PERFORM 700 steel, butt-welding, Radiographic testing (RT) technique, tensile test, bend test, microstructure

Abstract

In this paper, an experimental study on butt-welding technology of high strength PERFORM 700 steel plates was reported. The weldability of the base material, the adaptability of the materials to welding, and the mechanical properties of welding joints were assessed by the Radiographic testing (RT) technique, metallographic analysis, tensile test, bend test. The results show that PERFORM 700 steel has good weldability when using Kiswel K-110TK3 MAG flux-cored wire. The weld joint has fine ductility and after the bend test, there is no appearance of cracks or other defects. The welding joint reaches a high strength with yield and ultimate tensile strength of (712.0-720.0) MPa and (830.0-844.1) MPa, respectively. These results are the basis for manufacturing the high load-bearing structures and moreover, it allows a significant reduction of structural mass in comparison with conventional carbon steel structures.

điểm /   đánh giá
Published
2022-03-17
Issue
Vol. 17 No. 01 (2022)
Section
ARTICLES