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8 Cards in this Set
- Front
- Back
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Which of the following are the usual objectives of heat treatment? (3) (a) increase hardness (b) increase melting temperature (c) increase re-crystallization temperature (d) reduce brittleness (e) reduce density (f) relieve stresses |
increase hardness, reduce brittleness. relieve stresses |
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Of the following quenching media, which one produces the most rapid cooling rate? (a) air (b) brine (c) oil (d) pure water |
brine |
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On which one of the following metals is the treatment called austenitizing be performed? (a) aluminum alloys (b) brass (c) copper alloys (d) steel |
steel |
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The treatment in which the brittleness of martensite is reduced is called which one of the following? (a) aging (b) annealing (c) austenitizing (d) normalizing (e) quenching (f) tempering |
tempering |
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The Jominy end-quench test is designed to indicate which one of the following? (a) cooling rate (b) ductility (c) hardenability (d) hardness (e) stength |
hardenability |
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In precipitation hardening, the hardening and strengthening of the metal occurs in which one of the following steps? (a) aging (b) quenching (c) solution treatment |
aging |
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Which one of the following surface-hardening treatments is the most common? (a) boronizing (b) carbonitriding (c) carburizing (d) chromizing (e) nitriding |
carburizing |
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Which of the following are selective surface hardening methods? (3) (a) austenitizing (b) electron beam heating (c) fluidized bed furnaces (d) induction heating (e) laser beam heating (f) vaccum furnaces |
electron beam heating, induction heating, laser beam heating |
