T6 Solutionizing Heat Treatment Parameter of A356 Alloy by Investment Casting

In this paper, a formula for the calculation of the carbon content during the austenitizing of cast iron was deduced, considering the effect of silicon content upon the heat-treatment parameter. According to this formula, the carbon content of the austenite at a certain austenization temperature for a cast iron with given components can be easily calculated, and the austenization temperature required to give the expected carbon content in the austenite can also be determined. Moreover, according to the relationship between the austenization temperature Tx and the associated carbon content Cax,, and considering the effect of the silicon content, a diagram showing Cax, Tx and the silicon content during the austenitizing of cast iron was prepared.

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Effect of Heat Treatment on the Mechanical Properties of Investment Casting Turbo Charger Wheel using A356 Alloy

Journal of the Korea Foundry Society ◽

10.7777/jkfs.2011.31.5.262 ◽

2011 ◽

Vol 31 (5) ◽

pp. 262-266 ◽

Cited By ~ 1

Author(s):

Sang-Mi Kim ◽

Kee-Do Woo ◽

Ji-Young Kim ◽

Sang-Hyuk Kim ◽

Sang-Hoon Park ◽

...

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Investment Casting ◽

A356 Alloy ◽

Turbo Charger

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Analysis and Calculation of Carbon Content in Austenitizing of Cast Iron

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.772.52 ◽

2013 ◽

Vol 772 ◽

pp. 52-56 ◽

Cited By ~ 1

Author(s):

Wen Bang Gong ◽

Yun Zhang ◽

Gang Yu Xiang

Keyword(s):

Heat Treatment ◽

Cast Iron ◽

Carbon Content ◽

Silicon Content ◽

Heat Treatment Parameter ◽

Treatment Parameter ◽

The Relationship

In this paper, a formula for the calculation of carbon content during austenitizing of cast iron was deduced, considering the effect of silicon content on the heat treatment parameter. According to this formula, the carbon content of the austenite in a certain austenization temperature for a cast iron with given components can be easily calculated, and the austenization temperature for getting the expected carbon content in the austenite can also be determined. Besides, according to the relationship between austenization temperature Tx and the according carbon content Cax, and considering the effect of silicon content, the diagram of Cax, Tx and silicon content during the austenitizing process of cast iron was made.

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Research on the influence of heat treatment parameter on the mechanical property of austempered ductile iron

2010 International Conference on Mechanic Automation and Control Engineering ◽

10.1109/mace.2010.5536871 ◽

2010 ◽

Cited By ~ 1

Author(s):

Wei Wang ◽

Xu-hong Guo ◽

Chi-hong Wang ◽

Hong Wang

Keyword(s):

Heat Treatment ◽

Mechanical Property ◽

Ductile Iron ◽

Austempered Ductile Iron ◽

Heat Treatment Parameter ◽

Treatment Parameter

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Investigation of Functionally Graded Aluminium A356 Alloy and A356-10%SiCp Composite for Hydro Turbine Bucket Application

International Journal of Engineering Research in Africa ◽

10.4028/www.scientific.net/jera.26.30 ◽

2016 ◽

Vol 26 ◽

pp. 30-46 ◽

Cited By ~ 2

Author(s):

Williams S. Ebhota ◽

Akhil S. Karun ◽

Freddie L. Inambao

Keyword(s):

Heat Treatment ◽

Tensile Stress ◽

Centrifugal Casting ◽

A356 Alloy ◽

Casting Process ◽

Ultimate Tensile Stress ◽

Functionally Graded ◽

Cnc Machining ◽

Mould Material ◽

Turbine Bucket

The study investigates the application of centrifugal casting process in the production of a complex shape component, Pelton turbine bucket. The bucket materials examined were functionally graded aluminium A356 alloy and A356-10%SiCp composite. A permanent mould for the casting of the bucket was designed with a Solidworks software and fabricated by the combination of CNC machining and welding. Oil hardening non-shrinking die steel (OHNS) was chosen for the mould material. The OHNS was heat treated and a hardness of 432 BHN was obtained. The mould was put into use, the buckets of A356 Alloy and A356-10%SiCp composite were cast, cut and machined into specimens. Some of the specimens were given T6 heat treatment and the specimens were prepared according to the designed investigations. The micrographs of A356-10%SiCp composite shows more concentration of SiCp particles at the inner periphery of the bucket. The maximum hardness of As-Cast A356 and A356-10%SiCp composite were 60 BRN and 95BRN respectively, recorded at the inner periphery of the bucket. And these values appreciated to 98BRN and 122BRN for A356 alloy and A356-10%SiCp composite respectively after heat treatment. The prediction curves of the ultimate tensile stress and yield tensile stress show the same trend as the hardness curves.

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Macro-, meso- and microstructural characterization of metallic lattice structures manufactured by additive manufacturing assisted investment casting

Scientific Reports ◽

10.1038/s41598-021-84524-y ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

V. H. Carneiro ◽

S. D. Rawson ◽

H . Puga ◽

P. J. Withers

Keyword(s):

Additive Manufacturing ◽

Investment Casting ◽

A356 Alloy ◽

Microstructural Characterization ◽

Lattice Structures ◽

Secondary Phases ◽

Micro Computed Tomography ◽

Fused Filament Fabrication ◽

Promising Alternative ◽

Heterogeneous Microstructures

AbstractCellular materials are recognized for their high specific mechanical properties, making them desirable in ultra-lightweight applications. Periodic lattices have tunable properties and may be manufactured by metallic additive manufacturing (AM) techniques. However, AM can lead to issues with un-melted powder, macro/micro porosity, dimensional control and heterogeneous microstructures. This study overcomes these problems through a novel technique, combining additive manufacturing and investment casting to produce detailed investment cast lattice structures. Fused filament fabrication is used to fabricate a pattern used as the mold for the investment casting of aluminium A356 alloy into high-conformity thin-ribbed (~ 0.6 mm thickness) scaffolds. X-ray micro-computed tomography (CT) is used to characterize macro- and meso-scale defects. Optical and scanning electron (SEM) microscopies are used to characterize the microstructure of the cast structures. Slight dimensional (macroscale) variations originate from the 3D printing of the pattern. At the mesoscale, the casting process introduces very fine (~ 3 µm) porosity, along with small numbers of (~ 25 µm) gas entrapment defects in the horizontal struts. At a microstructural level, both the (~ 70 μm) globular/dendritic grains and secondary phases show no significant variations across the lattices. This method is a promising alternative means for producing highly detailed non-stochastic metallic cellular lattices and offers scope for further improvement through refinement of filament fabrication.

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