Hui Wang's research while affiliated with University of Science and Technology Beijing and other places
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Publications (8)
The austenitizing process of pearlite during homogenization heat treatment of GCr15 bearing steel was studied using dilatometry. A detailed study was conducted on the relationship between the volume fraction of ferrite, cementite, austenite, and residual cementite during the phase transformation process and the changes in heating temperature and he...
The structure, elastic properties and electronic structure of Ti-Al intermetallics including Ti3Al (space group P63/mmc), TiAl (space group I4/mmm) and TiAl3 (space group P4/mmm) are systematically studied by first-principles calculations. The results show that Ti-Al intermetallics can exist stably whether Cr replaces Ti or Al. The ductility of the...
In order to understand the effects of heating temperature and holding time on decarburization of GCr15 bearing steel, an experimental device for heat treatment of bearing steel was designed and the sample was heated and held by a tubular heating furnace. The microstructure and depth of decarburized layer of bearing steel under various working condi...
In the process of steel production, rolling scheduling is a complex problem in hot rolling production. In this paper, according to the hot rolling production process and product constraints of iron and steel enterprises, the problem of rolling plan formulation is attributed to asymmetric traveling salesman problem, and the mathematical model of rol...
Because of the complex morphology of bulk carbides in the core of as-cast bearing steel, their dissolution process is complicated to model, since it is difficult to rationally simplify the bulk carbides using a simple geometric shape. In this study, a metallographic image of an actual bulk carbide is transformed into a two-dimensional physical mode...
The mechanical and chemical properties of alloy materials strongly depend on their chemical composition. Among them, Mn is an essential alloying element. After adding Mn to the α-Fe matrix, Mn will substitute the position of Fe. In the Fe-C-Mn system, Mn atoms will interact with C atoms in their neighbouring positions, thereby affecting C atoms’ co...
In this paper, the distribution of C and Cr in the microsegregation of Fe‐1C‐1.42Cr‐bearing steel was measured by experimental and numerical simulation methods. Melting points of the low‐melting zones were calculated with the Thermo‐Calc system; and then the verifications were made by heat treatment experiments and the temperature and time required...
Citations
... During the decarburization process, the concentration of C and Mn decreases on the surface due to carbon diffusion, while the core retains the same initial carbon concentrations; the same effect occurs with manganese, but to a lesser extent. According to Wang et al. [15], in the decarburization process, the carbon atoms inside the material diffuse outward and react with the gases inside the furnace, inducing the loss of carbon atoms. It is important to highlight that alloying elements have a marked influence on the decarburization resistance of austenitic manganese steels, such as Mn, Cr, and Si. ...
... As the depth of the decarburized layer increases, the fatigue limit of the material decreases [23]. Additionally, the decarburized layer changes the damage mechanism of the rail steel and influences the surface microstructure, hardness, wear, and fatigue resistance [24,25]. It has been observed that the reduction of the decarburized layer positively affects the material's fatigue resistance and service performance [26,27]. ...
... The traveling salesman problem (TSP) is a well-known combinatorial optimization problem with wide applications in real-life scenarios such as transportation [1], scheduling [2], warehouse order picking [3], etc. The problem can be formulated as follows: given n cities and the distance d ij between each pair of cities i and j, starting from an initial city, each city is visited exactly once, and the tour concludes by returning to the initial city. ...
... The martensitic transformation is a diffusionless transformation during quenching from supersaturated austenite to a tetragonal space-distorted lattice structure, which depends largely on the chemical composition of the austenite, as presented by Ishida [6] in their publication. According to Su et al. [7], the chemical composition of the austenite matrix is influenced by the time-and temperature-dependent carbide dissolution during heat treatment. Several empirical equations have been established in the past to predict the onset of martensitic transformations as a function of the chemical composition of the material. ...
... In recent years, the first principles calculation based on the density functional theory (DFT) has been widely used to investigate the adsorption and segregation of atoms on surfaces and interfaces of various materials. [14][15][16] 18) The interface between α-Fe and precipitated MnS inclusions was investigated by calculating the interfacial energy, the work of adhesion and the electronic structure. 19) Therefore, first principles calculation based on DFT has been proved to be a powerful, reliable, and economical method to investigate the adsorption behaviors of the atom on the surface or interface, which was widely applied to investigate the formation of the interface between various materials at the atomic level. ...
... Khan et al [15] demonstrated complete dissolution of the raw carbide of a casting billet after soaking treatment at 1200°C for 4 h. Su et al [16] examined the distribution of C and Cr in the microsegregation of iron-bearing 1C-1.42CR steel by numerical simulation and heat treatment experiments. ...
