2. Thin pieces of .25 mm thick strips of 1080 steel are heat treated in the following ways. Determine the microstructure of the steel samples after each treatment: a.) Heat for 1 hour to 875°C; salt water-quench. b.) Heat for 1 hour to 875°C; quench in molten salt to 300°C and hold 1 hour; air cool. c.) Heat for 1 hour to 875°C; quench in molten salt to 700°C and hold 2 hours; water quench. d.) Heat for 1 hour to 875°C; water-quench; reheat for 1 hour at 700°C; air cool. e.) Heat for 1 hour to 875°C; quench in molten salt to 600°C and hold 2 seconds; water quench.

2. Thin pieces of .25 mm thick strips of 1080 steel are heat treated in the following ways. Determine the microstructure of the steel samples after each treatment: a.) Heat for 1 hour to 875°C; salt water-quench. b.) Heat for 1 hour to 875°C; quench in molten salt to 300°C and hold 1 hour; air cool. c.) Heat for 1 hour to 875°C; quench in molten salt to 700°C and hold 2 hours; water quench. d.) Heat for 1 hour to 875°C; water-quench; reheat for 1 hour at 700°C; air cool. e.) Heat for 1 hour to 875°C; quench in molten salt to 600°C and hold 2 seconds; water quench.

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter2: Measurement, Materials, And Safety

Section2.7: Heat Treatment Of Metals

Problem 2RQ: Direct hardening can be performed on steel containing at least________ carbon.

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