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Refer to Figure below for the continuous cooling transformation and hardness vs weight % carbon diagrams below. For the composition of 0.8 % carbon, state the appropriate cooling curve to achieve a hardnss of 95HRB. Austenite Percent Feac 15 HRC Transformation Start Transformation Finish 320 35 Pearlite 280 - 30 - 25 HRB 240 Fine pearlite mac->omoEmd Bainite Course poorlite Brineil hatiness rumbar 200 Rock wil hudress 160 Spheroidite 120 70 .FO My BO 0.A 0.0 10 LOG TIME Composition [it's ( 101 10 10 105 time (s)

Refer to Figure below for the continuous cooling transformation and hardness vs weight % carbon diagrams below. For the composition of 0.8 % carbon, state the appropriate cooling curve to achieve a hardnss of 95HRB. TEMPERATURW Austenite Bainite Pearlite 10- 10 Transformation Start LOG TIME 10 2 Transformation Finish 1 10 time (s) M M Brinell hardness number 320 280 240 200- 160 120 80- 0 02 Percent Fe Fine pearlite 12 Coarse pearlite Spheroidite 0.4 O.G Composition (wt% C) 0.0 15 HRC 35 1.0 30 25 20 U HRB 100 90 80 60 Rockwell hardness