Abstract
Metal casting is a predominant manufacturing advancement for adeptly fabricating components with complicated shapes. Many of the industrial castings produced are made from steel and iron alloys with attractive properties and less production cost. In this research work, the effect of molybdenum addition to class 30 type grey cast iron for the production of high performance cast iron (HPCI) has been carried out. Molybdenum inclusion not only refines the majority of graphite flakes but also increases the length of a small fraction of graphite flakes and improves the thermal conductivity by a percentage up to 2.2% fixed as per the research conducted, while excessive molybdenum insertion not only induces precipitation and solution reinforcement but it will also enhance the ultimate tensile strength (UTS) and hardness. According to research conducted, it was proved that molybdenum inclusion of 120 gm showed a functional way to spread HPCI with enhancing mechanical and thermal properties in grey cast iron when compared to other percentages of molybdenum used and also the average difference in the percentage of hardness in each type of molybdenum sample is about 5 to 10 %. Finally, after the tests, it was also predicted that the molybdenum's hardenability property was beneficial for white cast iron production which will rise the wear resistance property.
Highlights
Due to superior production and reasonable cost, grey cast iron has been extensively used as one of the important materials for automobile components such as engine blocks and flywheel. These components are predominantly made of grey cast iron in the view of the fact it has the utmost mixture of thermal and mechanical properties
It is necessary to develop high performance cast iron (HPCI) with improved mechanical properties while maintaining high thermal conductivity to restore the elevated cost of ductile iron in the application of automobile components [1]
Surface modification was useful for high-resolution SEM observation which was used for the present research
Summary
Due to superior production and reasonable cost, grey cast iron has been extensively used as one of the important materials for automobile components such as engine blocks and flywheel. It is necessary to develop high performance cast iron (HPCI) with improved mechanical properties while maintaining high thermal conductivity to restore the elevated cost of ductile iron in the application of automobile components [1]. In order to upgrade gray cast iron service performance, some investigators worked on to develop molybdenum based grey cast iron alloys with modified chemical compositions to rise their wear resistance and other significant properties. Higher molybdenum concentration and long cooling times (thick section castings) achieve carbide formation and with it a loss of toughness These molybdenum-containing composite carbides are very stable and cannot be dissolved completely by heat treatment. According to the research performed it is necessary to develop high-performance cast iron (HPCI) with improved mechanical properties with sustaining high thermal conductivity to replace high-cost ductile iron in the application of automobile flywheel
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