Modelling of the investment casting process

Gebelin, Jean‐Christophe; Jolly, Mark

doi:10.1016/s0924-0136(02)00860-9

Cited by 42 publications

(32 citation statements)

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“…Gebelin and Jolly [4] explained that the accuracy of the wax patterns used has a direct bearing on the accuracy achievable in the final cast part. They also concluded that, it is useful for the investment caster to use precision-machined full -metal dies for producing wax patterns when large numbers of highly accurate components are required.…”

Section: Introductionmentioning

confidence: 99%

Recycling of Pattern Wax In The Investment Casting Process Using Microwave Dewaxing

Rani¹

2013

IOSRJEN

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For dewaxing in the investment casting process the use of microwave is steadily growing in industrial processes. The present work studies the possible influence of dewaxing on the wax properties in investment casting process using microwave oven. The wax blend made up of paraffin wax, microcrystalline wax, carnauba wax used in this work was prepared by melting in an oven equipped with a mineral oil bath. The chemical and structural stability of the wax were monitored throughout 10 dewaxing cycles, via various analyses, namely, linear shrinkage, volumetric shrinkage, hardness and roughness. The results showed that microwave dewaxing is viable, significantly decreasing the incorporation of dirt and water. The percentage of linear shrinkage and volumetric shrinkage is increasing gradually in each repeated cycle. The gradual change in linear shrinkage is less as compared to gradual change in volumetric shrinkage. The change in hardness is not following any pattern as it some times decreasing and some time increasing.

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Section: Introductionmentioning

confidence: 99%

Recycling of Pattern Wax In The Investment Casting Process Using Microwave Dewaxing

Rani¹

2013

IOSRJEN

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“…Numerical simulation technology shows great advantages over the conventional trial and error method on forecasting defects such as shrinkage and crack [36] . Many researches have been carried out for numerical simulation of TiAl alloy investment casting process for defects and dimension prediction.…”

Section: Effect Of Shell Mold Deformability On Results Of Investment mentioning

confidence: 99%

Research progress on refractory composition and deformability of shell molds for TiAl alloy castings

et al. 2018

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N ickel based superalloys are currently widely used as high temperature structural materials. However, it is more and more difficult to increase the service temperature because of the inherent limitation of superalloys. Due to the co-existence of metallic and covalent bond, intermetallic materials have higher specific strength and rigidity than common metals and better ductility than ceramics, which can be a potential substitute for conventional superalloys. Among these, TiAl based alloys are becoming competitive materials for heat-resistant structural components in aero and auto engines and have great application potential for their low density, at only half of nickel based alloys, as well as good creep resistance and oxidation resistance [1] . In 2007, the US Boeing company declared that TiAl alloys would be used for low pressure turbine blades in GEnx engine on the 787 airplane, which could reduce the weight of the engine by 800 pounds [2] . That was a milestone for the application of TiAl alloys to reduce Abstract: At present, most TiAl components are produced by an investment casting process. Environmental and economic pressures have, however, resulted in a need for the industry to improve the current casting quality, reduce manufacturing costs and explore new markets for the process. Currently, the main problems for investment casting of TiAl alloys are cracks, porosities, and surface defects. To solve these problems, many studies have been conducted around the world, and it is found that casting defects can be reduced by improving composition and properties of the shell molds. It is important to make a summary for the related research progress for quality improvement of TiAl castings. So, the development on refractory composition of shell molds for TiAl alloy investment castings was reviewed, and research progress on deformability of shell mold for TiAl alloy castings both at home and abroad in recent years was introduced. The existing methods for deformability characterization and methods for improving the deformability of shell molds were summarized and discussed. The updated advancement in numerical simulation of TiAl alloy investment casting was presented, showing the necessity for considering the deformability of shell mold during simulation. Finally, possible research points for future studies on deformability of shell mold for TiAl alloy investment casting were proposed.

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“…Some reliable predicted results can be obtained by finite element method, such as temperature field and position of porosity concentration of castings [5][6][7][8]. However, predicting the final shape of castings is a quantitative problem.…”

Section: Introductionmentioning

confidence: 99%

Dimensional shrinkage prediction based on displacement field in investment casting

Wang

Liu

et al. 2015

Int J Adv Manuf Technol

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The preparation of the wax pattern is a key procedure in investment casting, playing an important role with the solidification of the metal on the final dimensional accuracy of the casting part. This study considered the injection procedure and the metal solidification as a whole and tried to discover the individual influence of both factors on the dimensional accuracy of the part. In this paper, a ring-to-ring wax pattern was scanned by a kind of 3D laser scanner after being injected, and its displacement field was used as the input of numerical analysis of the deformation happened in next step. Experimental measurement and numerical prediction were compared then, and the results indicated that predicted shrinkage based on the deformed wax pattern was close to the measured one with only 0.32 % difference on average, and the introduction of the injection procedure improves the numerical prediction by xxx%. The proposed method would benefit for the control of the shrinkage allowances of the casting part.

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Modelling of the investment casting process

Cited by 42 publications

References 1 publication

Recycling of Pattern Wax In The Investment Casting Process Using Microwave Dewaxing

Recycling of Pattern Wax In The Investment Casting Process Using Microwave Dewaxing

Research progress on refractory composition and deformability of shell molds for TiAl alloy castings

Dimensional shrinkage prediction based on displacement field in investment casting

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