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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
Selection of
processes
397
Table 19.2 Roughness values for different
processes
Process R
a
(μτη)
Sand casting
Die casting
Investment casting
Hot rolling
Forging
Extrusion
Cold rolling
Turning
Planing and shaping
Milling
Grinding
12.5
0.8
1.6
12.5
3.2
0.8
0.4
to
to
to
to
to
to
to
0.4
to
0.8
0.8
0.1
to
to
to
25
1.6
3.2
25
12.5
3.2
3.2
6.
15
6.5
1.6
19.2 Casting of metals
Casting can be used for components from about 10"
3
kg in size to 10
4
kg, with
wall thicknesses from about 0.5 mm to
1
m. Castings need to have rounded
corners, no abrupt changes in section and gradual sloping surfaces. Casting is
likely to be the optimum method in the circumstance ...
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Publisher Resources

ISBN: 9781483141077