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Development of new grade of steel shots for casting cleaning
Author(s) -
Eissa Mamdouh,
ElFaramawy Hoda,
Mattar Taha,
Fathi Ayman,
ElFawakhry Kamal
Publication year - 2002
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.200200176
Subject(s) - metallurgy , nozzle , tempering , materials science , microstructure , chemistry , mechanical engineering , engineering
A technology has been developed for producing a new grade of steel shots used in casting cleaning. The developed technology is based on obtaining molten steel with the specified chemical composition microalloyed with titanium and using a highly efficient method of dispersing molten steel stream by water jet under high pressure followed by spheroidisation of produced particles and their solidification in water bath. The chemical composition and tapping temperature have been adjusted and different parameters of atomization process such as molten stream nozzle internal diameter, impact angle, water nozzle system and water pressure have been optimized to attain steel shots with the desired mechanical properties, microstructure, density and grain size. After drying, the steel shots are screened to different sizes. The desired grain size is then subjected to only one‐step tempering process. This technique reduces the processing steps (by omission of the reheating‐quenching treatment) and consequently gives significant savings in processing cost.