A 1020 steel contains 0.20% carbon is carburized by a source that maintains a surface carbon content 0f2.0% C. It is desired to produce a 0.80 wt% C concentration 0.1 cm below the steel surface after a 4-hourtreatment. 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/molerf(z)erf(z)erf(z)0.550.56331.30.93400.0250.050.02820.600.60391.40.95230.05640.650.64201.50.96610.100.11250.700.67781.60.97630.150.16800.750.71121.70.98380.200.250.300.22270.800.74211.80.98910.27630.850.77071.90.99280.32860.900.79702.00.99530.350.37940.950.82092.20.99810.400.42841.00.84272.40.99930.450.47551.10.88022.60.99980.500.52051.20.91032.80.9999

Given that, Carbon content at surface, Cs=2 %CInitial carbon content, Co=0.2 % CCarbon content at a…

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

See similar textbooks

Similar questions

In a binary Fe-Fe3C system, what is the transformation that occurs when cooling an austenistic mixture of 2% C by weight from 1100°C to below the eutectoid temperature? What is the microstructure, and how is it formed? What are the concentrations of the total and partial phases? Data: eutectoid temperature: 723 ºC, eutectoid concentration: 0.76% C, limit concentration of ferrite: 0.022%, limit concentration of cementite: 6.7%.
Q1 A/ Cu has F.C.C structure , lattice parametres of 0. 3615 nm, 83.7 kj / m³ is requried to produce avacncy, N, of 6.022 x 10 23 , K of 1.38 x10-23 j /K Determine : 1. number of atoms per m 2 .number of vacancies at 100 °C
To increase the hardness of a steel gear, it was carburized at 850oC by introducing 1.3%C at its steel surface. What will be the final carbon content 1.4 mm beneath the surface if this treatment was lasted for 26 hours. The initial carbon content of steel is 0.1%C. (gas constant is 8.31 j/mol.K)
Refer to the Time Temperature Transformation (TTT) diagram given in Appendix A: (i) Determine the resulting microstructure for 0.8% carbon steel if the steel is rapidly cooled from the y region to 280°C within 5 seconds. (i) If the resulting microstructure in Question 6b (i) above is reheat to 300°C within 1 minute and hold for 1 hour at remain temperature, then and then rapidly quenched to room temperature, determine its final microstructure. (ii) If the resulting microstructure in Question 6b (i) above is reheat to 300°C within 1 minute and hold for 16 minutes at remain temperature, then and then rapidly quenched to room temperature, determine its final microstructure. (iv) Arrange the mircostructures 6 (b) (i,i and i) from the lowest to the highest hardnes value. (v) Sketch the thermal history from Question 6b (i) to (ii) on a TTT diagram.
Pravinbhai
An FCC iron–carbon alloy initially containing 0.25wt% C is carburized at an elevated temperature and in an atmosphere wherein thesurface carbon concentration is maintained at 1.0 wt%. If after 55.0 h the concentrationof carbon is 0.35 wt% at a position 5.0 mm below the surface, determine thetemperature at which the treatment was carried out.
Identify the microstructures of each of expected to be found in each of these alloys 1095 furnace cooled from 1650 farenheight 1095 air cooled from 1650 farenheight 1095 water quenched from 1650 farenheight
Read the question carefully and give me right solution according to the question
If the initial composition of the carbon steel is c0=0.3 wt%, calculate the carbon concentration (in wt%) at a distance 0.2mm from the surface of the component after 1 hour of decarburization.
Which of the following alloys would form a complete substitutional solid solution? O Metal 1 is HCP, metal 2 is FCC, and atomic radius difference is less than 15%. O Metal 1 is BCC, metal 2 is BCC, and atomic radius difference is at least 15%. O Metal 1 is FCC, metal 2 is FCC, and atomic radius difference is 12%. O Metal 1 is BCC, metal 2 is FCC, and atomic radius difference is 12%. O Metal 1 is FCC, metal 2 is FCC, and atomic radius difference is 15%.
A metal has a certain fraction f = 105 of vacancies at the atomic level at finite temperatures. If the activation energy for vacancy formation was increased by 50%, what would be the new vacancy concentration? Select one: a. 7.43E-10 b. 6.22 E-5 C. 1.24E-6 O d. 3.16E-8 e. 5.48E-4