Wei Shizhong

Phase Structure and Fine Microstructure of In-Situ Vanadium Carbides in Cast High-Vanadium High-Speed Steel

The phase structure and fine-microstructure of in-situ vanadium carbide formed during solidification in cast high-speed steel were studied and observed through high resolution electron microscope (HREM). In addition, the different micro-area compositions in vanadium carbide were analyzed via energy-dispersive spectroscopy (EDS). The results show that vanadium carbides are characterized by large amounts of MC-type nano-particles carbides, an enriched Mo element, distributed in a matrix composed of VC (FCC lattice) and V6C5 (HCP lattice). MC-type nano-particles are coherent or partially coherent with a matrix of vanadium carbide.

Use of Artificial Neural Network in Predicting Mechanical Properties of High-Speed Steel (HSS)

This paper is dedicated to the application of artificial neural networks in building prediction models of mechanical properties of new high-speed steel, including predictions of hardness (H) and impact toughness (Ak) according to quenching and tempering temperatures (T1, T2). multilayer backpropagation (BP) networks are created and trained using comprehensive datasets tested by the authors. And very good performances of the neural networks are achieved. The prediction values sufficiently mine the basic domain knowledge of heat treatment process of HSS. A new application field of neural network was developed by the authors