Novel Techniques of Ceramic Shell Molds Production with Lost-Wax Method

2014 ◽  
Vol 1040 ◽  
pp. 686-689 ◽  
Author(s):  
Igor G. Sapchenko ◽  
Sergey G. Zhilin ◽  
Oleg N. Komarov
Keyword(s):  
Fracture Strength ◽  
Distinguishing Characteristic ◽  
Ceramic Shell ◽  
Shell Mold ◽  
Prime Cost ◽  
Ceramic Shell Mold ◽  
Technological Methods ◽  
Strength Improvement

In this paper we propose novel techniques of ceramic shell mold production with lost-wax method of cast as well as technological methods aimed at fracture strength improvement. The distinguishing characteristic of application of these molds is the possibility to use them without buckling agent resulting in decrease of prime cost in casting.

scholarly journals Effects of Mold Materials on the Interfacial Reaction between Magnesium Alloy and Ceramic Shell Mold during Investment Casting

Metals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 991
Author(s):  
Yiwei Hao ◽  
Jinxue Liu ◽  
Jiang Du ◽  
Wenjie Zhang ◽  
Yang Xiao ◽  
...  
Keyword(s):  
Interfacial Reaction ◽  
Investment Casting ◽  
Casting Process ◽  
Optical Microscope ◽  
Mold Material ◽  
Reaction Interface ◽  
Ceramic Shell ◽  
Shell Mold ◽  
High Thermodynamic Stability ◽  
Ceramic Shell Mold

In order to suppress the interfacial reaction between the ceramic shell mold and the magnesium molten alloy during the investment casting process, a mold material with a high thermodynamic stability based on alkaline zirconium sol (CH4NO3Zr) binder and corundum (Al2O3) powder was prepared. The effects of the mold materials and casting thicknesses on the interfacial reaction were investigated by an optical microscope, X-ray diffraction, a scanning electron microscope, and an energy dispersive spectroscope analysis. The results suggested that the casting poured by the conventional ZrSiO4 mold has a serious reaction on the surface, and the reaction was more severe when the casting thickness was increased. The oxidation layer was approximately 300 μm in some severe areas of 45 mm thickness. The XRD and EDS results showed that the reaction interface mainly contains MgO and Mg2Si. While the casting poured by the Al2O3 mold provides a light and smooth surface, the reaction layer was only 1.5 μm on average. The reaction interface mainly contains MgO and Mg2F.

scholarly journals 3D temperature map reconstruction of a ceramic shell mold in investment casting process

2016 ◽  
Author(s):  
C.S. Greco ◽  
G. Paolillo ◽  
C. Caramiello ◽  
M. Di Foggia ◽  
G. Cardone
Keyword(s):  
Investment Casting ◽  
Casting Process ◽  
Ceramic Shell ◽  
Shell Mold ◽  
Investment Casting Process ◽  
Ceramic Shell Mold

3D Printing of Ceramic Shell Molds for Precision Casting of Turbine Blades

2021 ◽  
Author(s):  
Liubov Magerramova ◽  
Boris Kozlov ◽  
Eugene Kratt
Keyword(s):  
3D Printing ◽  
Turbine Blades ◽  
Shell Shape ◽  
Ceramic Shell ◽  
Labor Costs ◽  
Precision Casting ◽  
Design And Manufacturing ◽  
Refractory Ceramic ◽  
Internal Core ◽  
Ceramic Shell Mold

Abstract Traditionally, the technology used in the production of gas turbine blade castings characterized by a large number of technological conversions, high labor costs with a large amount of manual labor and the need to produce various types of complex and expensive equipment at different stages of production. This work aims to reduce the time and money spent on the manufacturing of ceramic shell shapes — a form suitable for the standard methods of precision casting by traditional heat-resistant nickel alloys. The proposed approached involves obtaining a shell shape with an internal core as a single, non-assembled product, without lengthy and time-consuming design and manufacturing processes involved in forming equipment for the production of castings based on smelted models. The proposed method is based on the use of 3D printing with refractory ceramic pastes. Using both uncooled and cooled blades as examples, models of casting molds were designed, technological processes were developed, and ceramic shell molds were manufactured. Experimental casting into a manufactured ceramic shell mold for an uncooled blade with a bandage shelf was performed and showed satisfactory results.

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