8.
What does the following diagram represent? Describe the events shown in the diagram.
Answers
Answer:
Where is the diagram?
Explanation:
Answer:
Cast iron is the class of iron–carbon alloys with the carbon content more than 2%. Its very usefulness derives from its relatively low melting temperature. alloy constituents affect its color when fractured: while cast iron has carbide impurities which allow cracks to pass the straight through, grey cast iron has graphite flake which deflect the passing crack and initiate countless new cracks as material breaks, and ductile cast iron has the spherical graphite "nodules" which stop crack from further progressings.
Carbon (C), ranging from the 1.8 to 4 wt%, and silicon (Si), 1–3 wt%, are main alloying elements of the cast iron. Iron alloys with lower carbon content are known as the steel.
Cast iron tends to be a brittle, except for malleable cast irons. With its relatively low melting point, good fluidity, castability, excellent machinability, resistance to the deformation and wear resistance, cast irons have become an engineering material with a wide range of the applications and are used in pipes, machines and automotive industry parts, such as the cylinder heads, cylinder blocks and gearbox cases. It is resistant to the damage by oxidation but is notoriously difficult to weld.
The earliest cast-iron artefacts date to 5th century BC, and they were discovered by archaeologists in what is now Jiangsu in China. Cast iron was used in the ancient China for warfare, agriculture, and architecture. During the 15th century, cast iron became utilized for cannon in the Burgundy, France, and in England during Reformation. amounts of cast iron used for cannons required large-scale production. The first cast-iron bridge was built during 1770s by Abraham Darby III, and is known as Iron Bridge in Shropshire, England. Cast iron was also used in construction of buildings.
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