Papers by Author: Wei Hua Sun

Abstract: To save energy, the heavy machinery industries are encountering the challenge of reducing the equipment weight. The paper introduced a 550 MPa grade steel plate to replace the traditional 345 MPa grade steel for heavy machinery manufacturing. The niobium and vanadium micro-alloyed steel plate is characterized as bainite microstructure with high toughness, improved welding performance, and good fatigue resistance. A comparison between the present 550 MPa grade steel plate and a Ni, Mo, Cu bainite steel was studied. The developed steel plate shows competitiveness for a high performance and low cost. The 15% of weight reduction is achieved in a 50 ton digger at a typical engineering machinery plant.