A 1020 steel contains 0.20% carbon is carburized by a source that maintains a surface carbon content Of 2.0% C. It is desired to produce a 0.80 wt% C concentration 0.1 cm below the steel surface after a 4-hour treatment. At what temperature should the carburization be carried out? R = 8.314 J/mol•K; DO = 2.3x10-5 m2 /s; Qd =148,000 J/mol
A 1020 steel contains 0.20% carbon is carburized by a source that maintains a surface carbon content Of 2.0% C. It is desired to produce a 0.80 wt% C concentration 0.1 cm below the steel surface after a 4-hour treatment. At what temperature should the carburization be carried out? R = 8.314 J/mol•K; DO = 2.3x10-5 m2 /s; Qd =148,000 J/mol
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:A 1020 steel contains 0.20% carbon is carburized by a source that maintains a surface carbon content 0f
2.0% C. It is desired to produce a 0.80 wt% C concentration 0.1 cm below the steel surface after a 4-hour
treatment. At what temperature should the carburization be carried out? R = 8.314 J/mol•K; DO =
2.3x10-5 m2 /s; Qd=148,000 J/mol
erf(z)
erf(z)
erf(z)
0.55
0.5633
1.3
0.9340
0.025
0.05
0.0282
0.60
0.6039
1.4
0.9523
0.0564
0.65
0.6420
1.5
0.9661
0.10
0.1125
0.70
0.6778
1.6
0.9763
0.15
0.1680
0.75
0.7112
1.7
0.9838
0.20
0.25
0.30
0.2227
0.80
0.7421
1.8
0.9891
0.2763
0.85
0.7707
1.9
0.9928
0.3286
0.90
0.7970
2.0
0.9953
0.35
0.3794
0.95
0.8209
2.2
0.9981
0.40
0.4284
1.0
0.8427
2.4
0.9993
0.45
0.4755
1.1
0.8802
2.6
0.9998
0.50
0.5205
1.2
0.9103
2.8
0.9999
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