5. The process of austempering requires that a steel be quenched to just above its Ms...

 

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5. The process of austempering requires that a steel be quenched to just above its Ms temperature, and then isothermally transformed to a lower bainite structure that resembles tempered martensite. For a steel with the TTT diagram below, estimate the maximum thickness of plate that can be completely austempered by quenching 1 into molten salt at 350°F from a 1600°F austenitizing temperature with h = 50 Btu/hr-ft? °F. For the steel, assume a = 0.46 ft?/hr and k = 20 Btu/hr-ft °F. 1600 F+C 1000 so0 200 TO 10 10 sec 5. The process of austempering requires that a steel be quenched to just above its Ms temperature, and then isothermally transformed to a lower bainite structure that resembles tempered martensite. For a steel with the TTT diagram below, estimate the maximum thickness of plate that can be completely austempered by quenching 1 into molten salt at 350°F from a 1600°F austenitizing temperature with h = 50 Btu/hr-ft? °F. For the steel, assume a = 0.46 ft?/hr and k = 20 Btu/hr-ft °F. 1600 F+C 1000 so0 200 TO 10 10 sec

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Since we must 6ol at such a vale as to brong the center of the plate 1da past the nose of the ... View the full answer