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Engineering Materials Technology, 2nd Edition
book

Engineering Materials Technology, 2nd Edition

by William Bolton
October 2013
Intermediate to advanced content levelIntermediate to advanced
468 pages
20h 15m
English
Newnes
Content preview from Engineering Materials Technology, 2nd Edition
204 Engineering Materials Technology
For a 1.2 per cent hypereutectoid steel (as in Figure 11.6) at just above
723°C:
Mass of cementite x (1.20 - 0.80) = mass of austenite x (6.67 - 1.2)
mass of cementite _ 6.67 - 1.2
mass of austenite 1.2 - 0.80
= 13.7
Thus at this temperature about 93 per cent is cementite and 7 per cent
austenite. The austenite forms pearlite at 723°C and thus about 7 per cent will
become pearlite. There will be little further change on cooling to room
temperature and thus the composition of a 1.2 per cent hypereutectoid steel
will be 93 per cent cementite and 7 per cent pearlite.
The effect of carbon content
Ferrite is
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Publisher Resources

ISBN: 9781483141077