2) A 1 in Dia x 3 in long mild steel hammer head is to be heat treated for surface hardening. If the material starts at room temperature (25°C) and must rise to 900 °C, how many Joules of energy will be required to perform this operation? Assume Steel weighs appx 500lb/ft?. Hint: Careful of your mixed units! Material Linear Specific heat Thermal expansivity 10* K capacity conductivity Wm'K Metals Aluminium Сорper Mild steel 24 18 920 385 230 380 480 54 Polymers Polyvinyl chloride Polyethylene Ероху сая гsin 70-80 840-1200 1900-2300 0.3-0.5 1000 0.1-0.2 100-200 45-65 0.1-0.2 Ceramics Alumina Fused silica 750 800 38 0.5 Glass 800
2) A 1 in Dia x 3 in long mild steel hammer head is to be heat treated for surface hardening. If the material starts at room temperature (25°C) and must rise to 900 °C, how many Joules of energy will be required to perform this operation? Assume Steel weighs appx 500lb/ft?. Hint: Careful of your mixed units! Material Linear Specific heat Thermal expansivity 10* K capacity conductivity Wm'K Metals Aluminium Сорper Mild steel 24 18 920 385 230 380 480 54 Polymers Polyvinyl chloride Polyethylene Ероху сая гsin 70-80 840-1200 1900-2300 0.3-0.5 1000 0.1-0.2 100-200 45-65 0.1-0.2 Ceramics Alumina Fused silica 750 800 38 0.5 Glass 800
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Transcribed Image Text:2) A 1 in Dia x 3 in long mild steel hammer head is to be heat treated for surface hardening. If the material
starts at room temperature (25°C) and must rise to 900 °C, how many Joules of energy will be required to
perform this operation? Assume Steel weighs appx 500lb/ft?. Hint: Careful of your mixed units!
Material
Linear
Specific heat Thermal
expansivity
10* K
capacity
conductivity
Wm'K
Metals
Aluminium
Сорper
Mild steel
24
18
920
385
230
380
480
54
Polymers
Polyvinyl chloride
Polyethylene
Ероху сая гsin
70-80
840-1200
1900-2300 0.3-0.5
1000
0.1-0.2
100-200
45-65
0.1-0.2
Ceramics
Alumina
Fused silica
750
800
38
0.5
Glass
800
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