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10. A 1020 steel is carburized and a case depth of 0.25 mm is needed. The case depth is defined a...
4. (a) Why are the steel gears case hardened? How it is done? (b) For a...
4. (a) Why are the steel gears case hardened? How it is done? (b) For a 1020 steel it has been determined that a carburizing treatment of 15 hr duration at 900 °C will raise the carbon concentration to 0.35 wt% at a point 2.0 mm from the surface. Estimate the time necessary to achieve the same carbon concentration at a 6.0 mm position from the surface for the same steel and at the same carburizing temperature.
6. (10) For a steel alloy at 900'C, it has been determined that a carburizing heat...
6. (10) For a steel alloy at 900'C, it has been determined that a carburizing heat treatment of 8 hours will raise the carbon concentration to 0.35 W% at a point 0 mm from the surface. If the same steel is left in the furnace for 150 hours, to what depth below the surface will there be a carbon concentration of 0.35 wt%? Must show work and support any assumptions. Do = D exf toRT 10
6. (10) For a...
3. For a steel alloy it has been determined that a carburizing heat treatment of 10...
3. For a steel alloy it has been determined that a carburizing heat treatment of 10 h duration will raise the carbon concentration to 0.45 wt% at a point 2.5 mm from the surface. Estimate the time necessary to achieve the same concentration at a 5.0 mm position for an identical steel and at the same carburizing temperature. [40]
9, carbon is diffused into a 1020 steel (0.2 wt% C) for 2 hours at 950°C The surface concentratio...
9, carbon is diffused into a 1020 steel (0.2 wt% C) for 2 hours at 950°C The surface concentration for carbon is 1 wt%. Plot the carbon concentration distance for 0 to 0.5 mm. Note: Use the carbon diffusion data for y-Fe.
9, carbon is diffused into a 1020 steel (0.2 wt% C) for 2 hours at 950°C The surface concentration for carbon is 1 wt%. Plot the carbon concentration distance for 0 to 0.5 mm. Note: Use the carbon...
Current Attempt In Progress For a steel alloy it has been determined that a carburizing heat treatment of 17...
Current Attempt In Progress For a steel alloy it has been determined that a carburizing heat treatment of 17 h duration at 700'C will raise the carbon concentration to 0.39 wt at a point 3.9 mm from the surface. Estimate the time necessary to achieve the same concentration at a 7.7 mm position for an identical steel and at a carburizing temperature of 1030°C. Assume that Dois 3.1 * 10 m/s and Q, is 103 kJ/mol. e Textbook and Media...
2 a) It is given that a carburizing heat treatment of 10-hour duration of a steel...
2 a) It is given that a carburizing heat treatment of 10-hour duration of a steel alloy will raise the carbon content to 0.45 wt% at a point 2.5 mm away from the surface. Compute the time required to get the same concentration at a 5.0-mm position from the surface at the same carburizing temperature for an identical steel alloy (Hint: The diffusion coefficient will be a constant for two identical materials at a given temperature). b) What is the...
UTVER VIS Concentration of Nitrogen (wt%): = 0.21 Position in mm= 7.2 Diffusion Coefficient for Nitrogen...
UTVER VIS Concentration of Nitrogen (wt%): = 0.21 Position in mm= 7.2 Diffusion Coefficient for Nitrogen in Iron at 700°C -8.90E-10 Nitrogen in Iron Heat Treatment Time (hours): = 8 Carburizing Time (hrs): = 7 Steel Alloy Case Depth (mm): 4.8 Steel Alloy New Case Depth (mm) - 9.9 Activation Energy kJ/mol: = 103 Temperature for Problem 3 (Celsius) -809 . Data for Problem 4 Temperature in C: -595 Diffusivity (m2/s) = 5.62E-14 Temperature in C: -702 Diffusivity (m /s)...
QUESTION 1 5 points (Extra Credit) Save Answer Using the table below, which element is most...
QUESTION 1 5 points (Extra Credit) Save Answer Using the table below, which element is most soluble in aluminum? c Rad us Electr Structure Aluminum 0.143 Cubic HCP OL Silicon l. Zinc OV. Copper QUESTION 2 4 points Save Answer A gear made of 1020 steel (0.20 wt%C) is to be gas-carburized at 927°C. Calculate the carbon content (in wt% C) at 1.5 mm below the surface of the gear after an 10-hour carburizing time. Assume the carbon content at...
In the carburizing process the steel piece was exposed, at an elevated temperature (900 °C), to...
In the carburizing process the steel piece was exposed, at an elevated temperature (900 °C), to an atmosphere rich in a hydrocarbon gas, such as methane CH Surface concentration of carbon is to be maintained at 1.18 wt%. Determine the time (in hours) necessary to achieve a carbon content of 0 68 wt% at a position 0.8 mm below the surface. Initial carbon concentration is 0 18 wt% Take the diffusion coefficient for carbon in iron at 900°C = 1.0...
2.4 For a steel alloy it has been determined that a carburizing heat treatment of 5-h...
2.4 For a steel alloy it has been determined that a carburizing heat treatment of 5-h duration will raise the carbon concentration to 0.45 wt% at a point 2.5 mm from the surface. Estimate the time necessary to achieve the same concentration at a 5.0-mm position for an identical steel and at the same carburizing temperature. Dt 2 2. 2. 2.
4. (a) Why are the steel gears case hardened? How it is done? (b) For a 1020 steel it has been determined that a carburizing treatment of 15 hr duration at 900 °C will raise the carbon concentration to 0.35 wt% at a point 2.0 mm from the surface. Estimate the time necessary to achieve the same carbon concentration at a 6.0 mm position from the surface for the same steel and at the same carburizing temperature.
6. (10) For a steel alloy at 900'C, it has been determined that a carburizing heat treatment of 8 hours will raise the carbon concentration to 0.35 W% at a point 0 mm from the surface. If the same steel is left in the furnace for 150 hours, to what depth below the surface will there be a carbon concentration of 0.35 wt%? Must show work and support any assumptions. Do = D exf toRT 10
6. (10) For a...
3. For a steel alloy it has been determined that a carburizing heat treatment of 10 h duration will raise the carbon concentration to 0.45 wt% at a point 2.5 mm from the surface. Estimate the time necessary to achieve the same concentration at a 5.0 mm position for an identical steel and at the same carburizing temperature. [40]
9, carbon is diffused into a 1020 steel (0.2 wt% C) for 2 hours at 950°C The surface concentration for carbon is 1 wt%. Plot the carbon concentration distance for 0 to 0.5 mm. Note: Use the carbon diffusion data for y-Fe.
9, carbon is diffused into a 1020 steel (0.2 wt% C) for 2 hours at 950°C The surface concentration for carbon is 1 wt%. Plot the carbon concentration distance for 0 to 0.5 mm. Note: Use the carbon...
Current Attempt In Progress For a steel alloy it has been determined that a carburizing heat treatment of 17 h duration at 700'C will raise the carbon concentration to 0.39 wt at a point 3.9 mm from the surface. Estimate the time necessary to achieve the same concentration at a 7.7 mm position for an identical steel and at a carburizing temperature of 1030°C. Assume that Dois 3.1 * 10 m/s and Q, is 103 kJ/mol. e Textbook and Media...
2 a) It is given that a carburizing heat treatment of 10-hour duration of a steel alloy will raise the carbon content to 0.45 wt% at a point 2.5 mm away from the surface. Compute the time required to get the same concentration at a 5.0-mm position from the surface at the same carburizing temperature for an identical steel alloy (Hint: The diffusion coefficient will be a constant for two identical materials at a given temperature). b) What is the...
UTVER VIS Concentration of Nitrogen (wt%): = 0.21 Position in mm= 7.2 Diffusion Coefficient for Nitrogen in Iron at 700°C -8.90E-10 Nitrogen in Iron Heat Treatment Time (hours): = 8 Carburizing Time (hrs): = 7 Steel Alloy Case Depth (mm): 4.8 Steel Alloy New Case Depth (mm) - 9.9 Activation Energy kJ/mol: = 103 Temperature for Problem 3 (Celsius) -809 . Data for Problem 4 Temperature in C: -595 Diffusivity (m2/s) = 5.62E-14 Temperature in C: -702 Diffusivity (m /s)...
QUESTION 1 5 points (Extra Credit) Save Answer Using the table below, which element is most soluble in aluminum? c Rad us Electr Structure Aluminum 0.143 Cubic HCP OL Silicon l. Zinc OV. Copper QUESTION 2 4 points Save Answer A gear made of 1020 steel (0.20 wt%C) is to be gas-carburized at 927°C. Calculate the carbon content (in wt% C) at 1.5 mm below the surface of the gear after an 10-hour carburizing time. Assume the carbon content at...
In the carburizing process the steel piece was exposed, at an elevated temperature (900 °C), to an atmosphere rich in a hydrocarbon gas, such as methane CH Surface concentration of carbon is to be maintained at 1.18 wt%. Determine the time (in hours) necessary to achieve a carbon content of 0 68 wt% at a position 0.8 mm below the surface. Initial carbon concentration is 0 18 wt% Take the diffusion coefficient for carbon in iron at 900°C = 1.0...
2.4 For a steel alloy it has been determined that a carburizing heat treatment of 5-h duration will raise the carbon concentration to 0.45 wt% at a point 2.5 mm from the surface. Estimate the time necessary to achieve the same concentration at a 5.0-mm position for an identical steel and at the same carburizing temperature. Dt 2 2. 2. 2.
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