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10 Cards in this Set
- Front
- Back
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23.1 Of the following cutting conditions, which one has the greatest effect on tool wear: (a) cuttingspeed, (b) depth of cut, or (c) feed? |
Answer. (a). |
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23.2 As an alloying ingredient in high-speed steel, tungsten serves which of the following functions (twobest answers): (a) forms hard carbides to resist abrasion, (b) improves strength and hardness, (c)increases corrosion resistance, (d) increases hot hardness, and (e) increases toughness? |
Answer. (a) and (d). |
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23.3 Cast cobalt alloys typically contain which of the following main ingredients (three best answers):(a) aluminum, (b) cobalt, (c) chromium, (d) iron, (e) nickel, (f) steel, and (g) tungsten? |
Answer. (b), (c), and (g). |
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23.4 Which of the following is not a common ingredient in cemented carbide cutting tools (two correctanswers): (a) Al2O3, (b) Co, (c) CrC, (d) TiC, and (e) WC? |
Answer. (a) and (c). |
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23.5 An increase in cobalt content has which of the following effects on WC-Co cemented carbides (twobest answers): (a) decreases hardness, (b) decreases transverse rupture strength, (c) increaseshardness, (d) increases toughness, and (e) increases wear resistance? |
Answer. (a) and (d). |
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23.6 Steel-cutting grades of cemented carbide are typically characterized by which of the followingingredients (three correct answers): (a) Co, (b) Fe, (c) Mo, (d) Ni, (e) TiC, and (f) WC? |
Answer. (a), (e), and (f). |
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23.7 If you had to select a cemented carbide for an application involving finish turning of steel, whichC-grade would you select (one best answer): (a) C1, (b) C3, (c) C5, or (d) C7? |
Answer. (d). |
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23.8 Which of the following processes are used to provide the thin coatings on the surface of coatedcarbide inserts (two best answers): (a) chemical vapor deposition, (b) electroplating, (c) physicalvapor deposition, (d) pressing and sintering, and (e) spray painting? |
Answer. (a) and (c). |
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23.9 Which one of the following materials has the highest hardness: (a) aluminum oxide, (b) cubic boronnitride, (c) high-speed steel, (d) titanium carbide, or (e) tungsten carbide? |
Answer. (b). |
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23.10 Which of the following are the two main functions of a cutting fluid in machining (two bestanswers): (a) improve surface finish on the workpiece, (b) reduce forces and power, (c) reducefriction at the tool-chip interface, (d) remove heat from the process, and (e) wash away chips? |
Answer. (c) and (d). |
