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MMET 207 Exam 1(Texas A&M University Dr. Price) Questions & Answers
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MMET 207 Exam 1(Texas A&M University Dr. Price) Questions & Answers
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MMET 207 Exam 1(Texas A&M UniversityDr. Price) Questions & Answers
EAF Process Correct Ans-Charged with solid pig iron → arc is struck and melts the metal →
oxygen lance is brought in and arc pulls impurities to the top → slag and steel are separated
Secondary steel refining Correct Ans-is aimed at altering chemical composition and reducing
non-metallic inclusions; produces higher quality steels and alloys
Continuous casting Correct Ans-Continuously pouring metal through a tundish into an open
ended mold to make simple slab shapes; end up with semi finished steel
Vacuum Degassing Correct Ans-ingot mold is melted in an evacuated chamber and then is
poured through a vacuum to suck out dissolved gases; makes very flat steel
Vacuum Arc Furnace (VAR) Correct Ans-Ingots are melted in a vacuum by making an arc
b/w each ingot and water-cooled copper mold; as the arc picks up the inclusions they're sucked
out by the vacuum; used for super alloys and extra clean steel
Electroslag Melting (ESM) Correct Ans-Similar to VAR but w/o vacuum; melting metal from
ingot passes through flux that acts as an electrode slag to remove impurities
, Vacuum Induction Melting (VIM) Correct Ans-Charge is melted in a crucible → causes
convection current stirring → inclusions go to the top and are sucked out by a vacuum ; used for
specialty alloys
Electron Beam Refining Correct Ans-Molten metal is poured down a tundish → as it flows
down an electron beam vaporizes (zaps) impurities out of the metal ; used for aerospace kind of
materials
Ladle stirring injection Correct Ans-Bubbling argon through the melt from a port in bottom of
ladle → desulfurization and deoxidation
Ladle Furnace Heating Correct Ans-Used to restore heat to the metal in the ladle; electric arc
heats melt at the top
Killed Steel Correct Ans-strongly deoxidized; chemical segregation is minimized b/c
dissolving elements are added to remove oxygen
Semi-Killed Steel Correct Ans-Intermediate in deoxidation b/w killed and rimmed; has less
killing agents
Capped Steel Correct Ans-Have a thin low-carbon rim; semi killed steel with similar
characteristics to rimmed steel
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