Developments in investment casting process—A review |
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| Authors: | Sarojrani Pattnaik D. Benny KarunakarP.K. Jha |
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| Affiliation: | Mechanical & Industrial Engg. Dept., Indian Institute of Technology Roorkee, Roorkee 247667, India |
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| Abstract: | Investment casting has been used to manufacture weapons, jewellery and art castings during the ancient civilization. Today, its applications include jewellery/art castings, turbine blades and many more industrial/scientific components. The present paper reviews various investigations made by researchers in different stages of investment casting and highlights their importance. The paper initially highlights the investigations made on pattern wax properties, effects of blending, additives and fillers. Different ways through which pattern properties (like surface finish, dimensional accuracy, etc.) could be enhanced by properly controlling the injection processing parameters are thoroughly discussed. The paper also looks into the investigations made to enhance the strength, surface finish, etc. of ceramic shell for ferrous alloys/non-ferrous alloys as well as superalloys in investment casting. Investigations made on incorporation of nylon fibers and polymer additions confirm that a ceramic shell reinforced with nylon fibers attains additional permeability compared to the one with polymer additions. |
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| Keywords: | 3D-P, three dimensional printings ATB, aluminum tri-sec-butoxide B140, pattern wax B97, low cost sprue wax BCV, bottom core vane BPM, ballistic particle manufacturing CAD, computer aided design CMM, coordinate measuring machine CT, computer tomography CTE, coefficient of thermal expansion DMLS, direct metal laser sintering ES, ethyl silicate ETS, ethyl silicate FCR, freeze cast process FDM, fused deposition modeling FE, finite element FEA, finite element analysis FSP, friction stir processing FT-IR, Fourier transform-infrared spectroscopy HIPping, hot isostatic pressing HTC, heat transfer coefficient IC, investment casting LENS, laser engineered net shaping LG, laser generating LOM, laminated object manufacturing MJM, multi-jet modeling MRI, magnetic resonance imaging RFP, rapid freeze prototyping RIC, rapid investment casting RP, rapid prototyping RP& T, rapid prototyping and tooling SALD, selective area laser deposition SDM, shape deposition manufacturing SLA, stereolithography SLS, selective laser sintering SR, surface roughness STL, standard tessellation language SW, swaging TP1, airfoil lunate (curvature) TP2, thickness difference of the airfoil VOC, volatile organic compound |
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