For a steel alloy it has been determined that a carburizing heat treatment of 18 h duration at 885°C will raise the carbon concentration to 0.46 wt% at a point 2.0 mm from the surface. Estimate the time necessary to achieve the same concentration at a 8.4 mm position for an identical steel and at a carburizing temperature of 1120°C. Assume that Do is 2.5 x 104 m2/s and Qd is 104 kJ/mol.
For a steel alloy it has been determined that a carburizing heat treatment of 18 h duration at 885°C will raise the carbon concentration to 0.46 wt% at a point 2.0 mm from the surface. Estimate the time necessary to achieve the same concentration at a 8.4 mm position for an identical steel and at a carburizing temperature of 1120°C. Assume that Do is 2.5 x 104 m2/s and Qd is 104 kJ/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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![For a steel alloy it has been determined that a carburizing heat treatment of 18 h duration at 885°C will raise the carbon concentration
to 0.46 wt% at a point 2.0 mm from the surface. Estimate the time necessary to achieve the same concentration at a 8.4 mm position
for an identical steel and at a carburizing temperature of 1120°C. Assume that Do is 2.5 x 10-4 m2/s and Qa is 104 kJ/mol.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc9133870-6329-47fc-8646-3a7c388192b7%2F66acb76d-bebd-4efb-8a92-8f64f63dc3b2%2F9prakqu_processed.jpeg&w=3840&q=75)
Transcribed Image Text:For a steel alloy it has been determined that a carburizing heat treatment of 18 h duration at 885°C will raise the carbon concentration
to 0.46 wt% at a point 2.0 mm from the surface. Estimate the time necessary to achieve the same concentration at a 8.4 mm position
for an identical steel and at a carburizing temperature of 1120°C. Assume that Do is 2.5 x 10-4 m2/s and Qa is 104 kJ/mol.
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