Developments in investment casting process—A review

Pattnaik, Sarojrani; Karunakar, D. Benny; Jha, Pradeep Kumar

doi:10.1016/j.jmatprotec.2012.06.003

Cited by 348 publications

(166 citation statements)

References 27 publications

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“…Especially, it is useful for castings with complex cavities in its body, which could not be fabricated by forging or machining, or where machining would be too wasteful of materials. Its applications include art castings, turbine blades and many more industrial components [1] . Jones and Yuan [2] pointed out that, in order to achieve a higher ability to resist cracking during dewaxing and casting, an investment casting mould must have sufficient green strength to withstand wax removal without failure as well as high thermal shock resistance to prevent cracking during metal pouring.…”

Section: Key Laboratory Of Materials Processing and Control Engineeringmentioning

confidence: 99%

Bending strength and fracture surface topography of natural fiber-reinforced shell for investment casting process

Lű

Liu²,

et al. 2016

China Foundry

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I nvestment casting has been widely used to manufacture castings for centuries, due to its advantages of producing high quality castings with excellent surface finish, dimensional accuracy, and near-net shape. Especially, it is useful for castings with complex cavities in its body, which could not be fabricated by forging or machining, or where machining would be too wasteful of materials. Its applications include art castings, turbine blades and many more industrial components [1] . Jones and Yuan [2] pointed out that, in order to achieve a higher ability to resist cracking during dewaxing and casting, an investment casting mould must have sufficient green strength to withstand wax removal without failure as well as high thermal shock resistance to prevent cracking during metal pouring. Heat permeability is required to promptly evacuate air and other entrapped gases during metal filling. At the same time, it is possible to break shells quite easily without causing any damage to castings when the molten metal in the shell has solidified Abstract: In order to improve the properties of silica sol shell for investment casting process, various contents of cattail fibers were added into the slurry to prepare a fiber-reinforced shell in the present study. The bending strength of fiber-reinforced shell was investigated and the fracture surfaces of shell specimens were observed using SEM. It is found that the bending strength increases with the increase of fiber content, and the bending strength of a green shell with 1.0 wt.% fiber addition increases by 44% compared to the fiber-free shell. The failure of specimens of the fiber-reinforced green shell results from fiber rupture and debonding between the interface of fibers and adhesive under the bending load. The micro-crack propagation in the matrix is inhibited by the micro-holes for ablation of fibers in specimens of the fiber-reinforced shell during the stage of being fired. As a result, the bending strength of specimens of the fired shell had no significant drop. Particularly, the bending strength of specimens of the fired shell reinforced with 0.6wt.% fiber reached the maximum value of 4.6 MPa.

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Section: Key Laboratory Of Materials Processing and Control Engineeringmentioning

confidence: 99%

Bending strength and fracture surface topography of natural fiber-reinforced shell for investment casting process

Lű

Liu²,

et al. 2016

China Foundry

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“…The experiments are conducted in accordance to Taguchi L9 orthogonal array. To make it easy systematic presentation of the process flow is shown below [4].…”

Section: Manufacturing Processmentioning

confidence: 99%

Effect of Process Parameters on Roughness and Hardness of Surface and Dimensional Accuracy of Lost Wax Process Casting

M¹

2015

J Material Sci Eng

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“…Next, the gates and runners are cut from the casting. After minor final post processing (sandblasting, machining), the castings -identical to the original wax patterns -are complete and ready [2][3][4][5][6]. It is well known that many process parameters may influence on the quality of the final part, its microstructure and finally its properties.…”

Section: Introductionmentioning

confidence: 99%

The Impact of the Thickness of the Ceramic Shell Mould on the (γ + γ′) Eutectic in the IN713C Superalloy Airfoil Blade Casting

Nawrocki

Pietraszek

2017

Archives of Metallurgy and Materials

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In the study the wall thickness of ceramic shell mould influence on (γ + γ') eutectic in the IN713C nickel-based superalloy airfoil blade casting was described.Two castings formed as a blade from two wax pattern assemblies were analysed. In the experiment in one pattern the thick ceramic layer was obtained on pressure side and in another one on suction side of the airfoil blade. The microstructure of the crosssections of the castings were observed on polished and etched metallographic specimens. The microstructure and phases chemical compositions of specimens was analyzed by using the scanning electron microscope Hitachi S-4200 equipped with EDS. It was established, that wall thickness of ceramic shell mould affect size, shape and volume fraction of (γ + γ') eutectic islands in airfoil blade made from IN713C superalloy.The analysis was provided in accordance to the typical statistical methodology [1].

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Developments in investment casting process—A review

Cited by 348 publications

References 27 publications

Bending strength and fracture surface topography of natural fiber-reinforced shell for investment casting process

Bending strength and fracture surface topography of natural fiber-reinforced shell for investment casting process

Effect of Process Parameters on Roughness and Hardness of Surface and Dimensional Accuracy of Lost Wax Process Casting

The Impact of the Thickness of the Ceramic Shell Mould on the (γ + γ′) Eutectic in the IN713C Superalloy Airfoil Blade Casting

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