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Engineering · Mechanical Engineering
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Question A.1 Use the provided Fe-FesC phase diagram (Fig. QA.1) to answer the following questions. plain-carbon steel containing 0.45 weight percent carbon (0.45wt%C) is slowly temperature just slightly below 727C. cooled from 90°Cto a (a ) Sketch the microstructure of the steel (0.45 wt%C). Label the phases, structures in the sketch. (b) Calculate the weight percent of pro-eutectold ferrite and the total weight percent of ferrite, the weight percent of eutectoid cementite, and the weight percent of eutectoid ferrite in the steel. c) Briefly discuss the mechani al properties and potential applications of plain carbon steels including carbon content from 0.05wt%-1.2wt%). , (d) Discuss the purposes of making alloy steels, and the purposes of heat treatment Composition at% C) 10 15 20 25 1600 400 2500 1394-С 1200 1147 C 2.14 4.30 2000 1000 912 c 800 1500 727 C 0.76 600 a-Ferrite+ Fe C 1000 6.67 (Fe) Composition (wt% C) Fe,c) (Fe,C)
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