Determine the carburizing time (in s) necessary to achieve a carbon concentration of 0.44 wt% at a position 1.7 mm into an iron- carbon alloy that initially contains 0.031 wt% C. The surface concentration is to be maintained at 1.2 wt% C, and the treatment is to be conducted at 1250°C. Assume that Do = 5.1 x 10-5 m²/s and Qd = 154 kJ/mol. You will find the table below useful. Z 0 0.025 erf(z) 0 0.0282 Z 0.55 0.5633 1.3 0.35 0.60 0.6039 1.4 0.15 0.1680 0.75 0.20 0.2227 0.80 erf(z) Z 0.05 0.0564 0.65 0.6420 1.5 0.9661 0.25 0.2763 0.85 0.10 0.1125 0.70 0.6778 1.6 0.9763 0.30 0.3286 0.90 erf(z) 0.3794 0.95 0.9340 0.9523 0.7112 1.7 0.9838 0.7421 1.8 0.9891 0.7707 1.9 0.9928 0.7970 2.0 0.9953 0.8209 2.2 0.9981

Determine the carburizing time (in s) necessary to achieve a carbon concentration of 0.44 wt% at a position 1.7 mm into an iron- carbon alloy that initially contains 0.031 wt% C. The surface concentration is to be maintained at 1.2 wt% C, and the treatment is to be conducted at 1250°C. Assume that Do = 5.1 x 10-5 m²/s and Qd = 154 kJ/mol. You will find the table below useful. Z 0 0.025 erf(z) 0 0.0282 Z 0.55 0.5633 1.3 0.35 0.60 0.6039 1.4 0.15 0.1680 0.75 0.20 0.2227 0.80 erf(z) Z 0.05 0.0564 0.65 0.6420 1.5 0.9661 0.25 0.2763 0.85 0.10 0.1125 0.70 0.6778 1.6 0.9763 0.30 0.3286 0.90 erf(z) 0.3794 0.95 0.9340 0.9523 0.7112 1.7 0.9838 0.7421 1.8 0.9891 0.7707 1.9 0.9928 0.7970 2.0 0.9953 0.8209 2.2 0.9981

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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