For the phase diagram below: The Vickers Hardness measurments of 3 different plain carbon steal samples are
Question:
For the phase diagram below:
The Vickers Hardness measurments of 3 different plain carbon steal samples are shown in the table below
A) 0.25C (Air Cooled): Plain carbon steel with a low carbon content of 0.25 wt% that has been heated to ~ 950°C and cooled slowly in air
B) 0.4C (Air Cooled): Plain carbon steel with a higher carbon content of 0.4 wt% that has been heated to ~ 950°C and cooled slowly in air
C) 0.4C (Water Quenched) Plain carbon steel with a carbon content of 0.4 wt% that has been heated to 950°C and quenched in water.
Q6: For sample C (0.4C Water Quenched) , explain the difference in the hardness in terms of the difference in the relative amounts of the phases present in the microstructure.
- explain in terms of the microstructure why the hardness is higher than for the sample with the same carbon content that was cooled in air (Sample B).
- identify the mechanical property of steel that may be adversely affected by quenching.
Fundamentals of Taxation 2015
ISBN: 9781259293092
8th edition
Authors: Ana Cruz, Michael Deschamps, Frederick Niswander, Debra Prendergast, Dan Schisler, Jinhee Trone