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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
Heat treatment of
steels
247
Martensitic
65
60
u
OS
00
(A
V
c
1
X
50
40
30
20
10
0 0.210.4,0.610.8 |1.0 1.2
% carbon
Figure 12.14 The hardness of carbon steel with martensitic or pearlitic structures
as a
function of carbon content
to transform to martensite M
s
depends on the carbon content of the steel (see
Figure 11.10 and Table 12.1).
Table 12.1
Relation
of M
s
to carbon content
Carbon content
0.2
0.4
0.8
1.2
MJ°c
490
420
250
150
The temperature at which the transformation from austenite to martensite is
complete M
F
is about 215°C below the M
s
temperatures. Thus for the 0.2 per
cent carbon steel the martensite will be complete by 275°C, th ...
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Publisher Resources

ISBN: 9781483141077