Question

6 Sp19 ().pdf 3/Downloads/Hw6.Sp 19%20(1).pdf In the process of manufacturing a steel forging, answer the following questions: i. During melting, what two principal impurities are introduced into the melt pool when the i. How are these removed from the melt pool in subsequent processing? (Hint: the methods ii. During ingot manufacture, which primary steel alloying element segregates with a low ladle is tapped through the open atmosphere? are different for each) concentration at the bottom and a high concentration at the top of the ingot after solidification? iv. Why does this element segregate in such a manner? During solidification of large ingots what is the name for the macro scale segregation event that occurs when re-melting is achieved by the advancing solidification front? (Hint: This process results in channels of extremely rich chemical composition.) V. vi. What is the typical industrial reduction ratio for an ingot while being processed into a vii. Why is this reduction ratio used? vii. Name at least one of the principal mechanisms for the development of mechanical forging? properties during heat treatment. ix. If one tempers steel to decrease the yield strength, what properties will be increased? x. What are the three principle reasons for industrial materials failures discussed in class? Ils F3

Answer 1

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