Ri E.H. et al. Influence of alloying elements on corrosion resistance of low-carbon white cast iron
Influence of carbide-forming elements (W, Cr, Mo, V, Mn) on corrosion resistance and heat resistance low-carbon white cast iron in a cast condition in 38%-solution of a hydrochloric acid within 5, 10, 15, 20, 25, 30 min. is researched. It is established, that corrosion resistance alloyed Cr and Mn changes on difficult dependence on their concentration with its maximum at 1,5% Mn and 10% Cr. In tungsten (up to 15%), molibdenic (up to 5%) and vanadic (up to 7%) cast irons corrosion resistance constantly increases. Hence, Mo and W most effectively increases corrosion resistance of white cast iron. The most heat resisting are chromic cast irons. Unlike chromic, in tungsten and molibdenic white cast irons oxidation rate very high, that is connected with formation friable oxide film because of great value of factor , describing the volume mole oxide-to-gram-atom of metal ratio. Manganese, forming dense oxide film, increases heat resistance.
Ri H. et al. Synthesis in a complex-alloyed white chromic cast iron functional purpose in cast and heat-treated conditions
Results of research of influence carbide-forming elements (Mo, W, V, Mn) on crystallization parameters, physical-mechanical properties and wear resistance of low-carbon chromic (6% Cr) white cast iron in cast and heat-treated state are resulted. Hardness and wear resistance of chromic cast iron in a cast condition at first increases at additional alloying of chromic cast iron Мо (up to 3%) and W (up to 10%). At alloying Mn up to 5% hardness and wear resistance are increase. Despite of insignificant reduction of hardness wear resistance of vanadic cast iron increases on 25%. Air training essentially increases hardness and wear resistance of the alloyed chromic cast iron. The maximal hardness and wear resistance of chromic cast iron were observed at 1 2% Mn, more than 2,5 % W, 0,5 1% Mo, 1 2% V. Low-temperature tempering reduces hardness and wear resistance of alloyed chromic cast irons.
Sapchenko I.G. et al. Performance of Risers with High Thermal Gradient for Steel Castings
The article discusses the results of investigating the properties of thermit compositions for core making with the purpose of enhancing the performance of risers with high thermal gradient. Recommendations on making thermit cores are given.
Dmitriyev E.A. et al. Improving Properties of Sodium Silicate-Bonded Sands by Reinforcing
The article discusses an organic-silicate binder produced by introducing organic fibers directly to sodium silicate and allowing to improve the processing characteristics of sodium silicate-bonded core sand by creating a better space lattice of dispersed reinforcement and forming a carcass in the core volume at a sodium silicate content in sand of not higher than 2…4%. Strengthening of sands was done either by short-time drying in oven or by carbonic acid gas blowing.
Petrov V.V. et al. Core Sand Using Polystyrene Solution as a Binder
The article discusses the possibility of using a polystyrene solution as an independent binder for making cores with improved physical-and-mechanical properties, which makes it possible to obtain a clean surface without using a burn-on preventing coating on the core.
Nekrasov S.A. et al. Influence of Shell Mold Design on the Hydrodynamic Pressure of Melt
The article describes investigations of the influence of special design features of shell molds for investment casting on the hydrodynamics of their filling with molten metal. An optimal embodiment of sump in the shell mold's gating system in the form of half of a torus has been established.
Salina M.V. et al. Effect of Evacuation on the Physical-and-Mechanical Properties and Dimensional Accuracy of Investment Casting Patterns
The article discusses a method of producing investment casting patterns by cold pressing with prior evacuation, allowing to enhance the physical-and-mechanical properties and dimensional accuracy of investment casting patterns.
Zhilin S.G. et al. Determining Properties of Porous Lost Patterns
The article discusses results of investigating the effect of powdered components of pattern compounds used for making porous lost patterns used in investment casting on their physical-and-mechanical and processing characteristics.
Petrov V.V. et al. Making Ceramic Shell Molds by the Electrophoresis Method
Discussed are the merits and demerits of various methods of making shell molds in investment casting. An electrophoretic method of making ceramic molds is described. Influence of various factors on the process of electrophoretic forming is discussed.
Ivanov V.V. et al. Experience of Making Aircraft Castings by V-Process Molding
EGES – a supplier of high-tech furnaces at a moderate price
Budanov Y.N. Modernization of Valve Casting Production in the Czech Republic
Degtyarenko G.I. et al. Rewiew of Domestic and International Information