Answer to Question #122137 in Material Science Engineering for Bane

Question #122137
For a 1080 steel that has been water quenched, estimate the tempering time at 535 C to
achieve a hardness of 45 HRC.
1
Expert's answer
2020-06-15T14:45:18-0400

This problem asks us to consider the tempering of a water-quenched 1080 steel to achieve a hardness of 45 HRC.  It is necessary to use Figure 10.35 from the text book.



We can see that at a hardness of 45 on the y-axis crosses the blue 535°C curve at around 60 s (1 min) on the x-axis. The time necessary at 535°C is about 1 min. 


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