S CONTINUOUS COOLING TRANSFORMATION DIAGRAM 40' C (1038-1043) AUSTENITISED AT 850C PREVIOUS TREATMENT ROLLED ANALYSIS W1% CS Mn PS Cr Mo Ni AI Nb v 0.00 0.20 270 0.0200.000 COOLING RATE AT 750 C PER MIN 20.000 10.000 2.000 100 20 10 2.000 1000 100 900 800 Ac START to sens Ac, 700 FINISH 600 500 400) M 300 2005 M 100 mm 0 1 02 200 300 1000 BAR DIAMETER 2000 mm LAIR 50 10 100 190 300 300 100159_3039 500 5 mm OIL mm WATER 800 Time Left::57 100) mm 0.1 02 200 500 TODO AIR BAR DIAMETER 10 10 100190 30300 500 100199 300 300 50 mm OIL -mm WATER 800 HARDNESS AFTER TRANSFORMATION 700 60 600 500 HV 400- -50 HRC -40 AS COOLED 300 200 30 20 F10 100 Record the hardness and final microstructure (estimate the amount of each phase) that would be created if 20mm bars of 1040 steel were quenched to 20C in air and water. Fill in the blanks for hardness and microstructure below. 20mm in Air Hardness (HRC) - Microstructure (% of each phase) - ] 20mm in Water Hardness (HRC) Microstructure (% of each phase)