Effect of Mould Coatings and Pouring Temperature on the Fluidity of Different Thin Cross-Sections of A206 Alloy by Sand Casting

Technical Paper
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Abstract

Thin-wall castings of the A206 alloy can pose a manufacturing problem associated with mould filling which results in fluidity defect. The mould coating generates a smooth surface, and reduces the friction between the melt and mould contact, thus reducing the heat-transfer coefficient, which in turn leads to enhancement of fluidity and mechanical properties. The fluidity of A206 alloy was observed in various cross-sections of the thin channels at three altered pouring temperatures i.e. 700, 750 and 780 °C for uncoated and coated green sand moulds. The Graphite and Soapstone powder coatings were used as sand mould coatings in the present investigation. It was found that the fluidity of aforesaid alloy was significantly increased with the Soapstone powder mould coating at pouring temperature of 750 °C. The characterization of the coating materials was performed by the X-ray diffraction analysis and scanning electron microscope test with EDAX.

Keywords

Sand casting A206 alloy Fluidity Pouring temperature Mould coatings Thin-wall castings 

Notes

Acknowledgements

Authors are glad to acknowledge the National Institute of Technology, Manipur for Financial Support to carry out the Experimental Research work of Mr. Srinivasa Rao Pulivarti, Full-time Research Scholar (Enrolment No: 15PME002) under the guidance of Dr. Anil Kumar Birru, Assistant professor and Head, in Mechanical Engineering Department-India-795004.

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Copyright information

© The Indian Institute of Metals - IIM 2018

Authors and Affiliations

  1. 1.Mechanical Engineering DepartmentNational Institute of TechnologyManipurIndia

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