APSC 131 Study Guide - Final Guide: Close-Packing Of Equal Spheres, Alloy Steel, Ductile Iron
19 Mar 2015
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0 to l00 c will: increase, decrease, remain same, first increase and then decrease, the number of electrons in 1 cm3 of metal would be of the order of, 1010, 1016, 1022, 1040. 10: an example of amorphous material is, zinc, lead, silver, glass, which is false statement about tempering. Tempering is done to: improve machinability, improve ductility, release stresses improve toughness, which is false statement about case hardening. Cemented carbide tools are not found to be suitable for cutting: brass, cast iron, aluminium, steel. Sulphur in steel: acts as deoxidizer, reduces the grain size, decreases tensile strength and hardness, lowers the toughness and transverse ductility. Tungsten in high speed steel provides: hot hardness, toughness, wear resistance, sharp cutting edge, which of the following is not the correct method of increasing fatigue limit, shot peening, nitriding of surface, cold working, surface decarburization.
