Exam 2 ENTC 207 questions well answered 2023 passed

Exam 2 ENTC 207Tool Steels - correct answer - Steels that do work to other steels (Working tools) - High alloy and carbon content - Expensive - Made in smaller lots with more controls - Cleanliness extremely critical - Not many made by many companies (limited accessibility Tool Steel Categories - correct answer - Letter and Number - Cold working - Shock Resisting - Hot working - High speed - Mold - Special Purpose Cold Working - correct answer - hardening methods - Prefix: W (water) - not same alloy - cools quickly - W1-3 O (oil) -O1, O2, O6, O7 A (Medium alloy air) - slowest but still can form martensite - A2, A4, A6-11 D (High C, High Cr) - chromium carbides -cementite = iron carbides - D2-5, D7 Shock Resisting - correct answer Prefix: S - S1, S2, S4-7 Hot Working - correct answer Prefix: H - H10-19 - Cr types -H20-39 - Tungsten types - H40-59 - Molybdenum types High Speed - correct answer Prefix: M, T - molybdenum - tungsten Mold - correct answer prefix: P Special Purpose - correct answer Prefix: L Manufacture - correct answer TABLE 15-2 Carbon Steels - correct answer - cold finished - Hot finished bars - plate sheet - strip Alloy Steels - correct answer - hot finished plates - some plate Tool Steels - correct answer - hot finished bars - forgings - special OCs Composition - correct answer Carbon Steels - correct answer Iron + Carbon + manganese options: sulfur, phosphorus Alloy Steels - correct answer Iron + Carbon + Manganese options: chromium, nickel, molybdenum, silicon, vanadium, sulfur, lead, aluminum Tool Steels - correct answer Iron + Carbon options: chromium, nickel, molybdenum, manganese, silicon, tungsten, cobalt, sulfur, vanadium, aluminum Microstructure - correct answer Carbon Steels - correct answer Hard = martensite soft = ferrite + pearlite Alloy Steels - correct answer Hard = martensite soft = ferrite + pearlite