4.1 Name TWO properties of EACH of the following structures of steel:
4.1.1 Cementite
4.1.2 Ferrite
4.2 FIGURE 4.2 below is a diagram that shows the heating process of carbon steel - NSC Mechanical Technology Automotive - Question 4 - 2017 - Paper 1
Question 4
4.1 Name TWO properties of EACH of the following structures of steel:
4.1.1 Cementite
4.1.2 Ferrite
4.2 FIGURE 4.2 below is a diagram that shows the heating proces... show full transcript
Worked Solution & Example Answer:4.1 Name TWO properties of EACH of the following structures of steel:
4.1.1 Cementite
4.1.2 Ferrite
4.2 FIGURE 4.2 below is a diagram that shows the heating process of carbon steel - NSC Mechanical Technology Automotive - Question 4 - 2017 - Paper 1
Step 1
4.1.1 Cementite
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Answer
Cementite is a hard and brittle structure that forms in steel. It contributes to the overall hardness of steel but can also lead to brittleness, making it less ductile.
Step 2
4.1.2 Ferrite
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Answer
Ferrite is a soft and ductile phase in steel. It allows for good machinability and contributes to the overall toughness of the steel.
Step 3
4.2.1 Identify the diagram shown in FIGURE 4.2
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Answer
The diagram shown in FIGURE 4.2 is the Iron-Carbon equilibrium diagram, illustrating the phase changes that occur in carbon steel as temperature and carbon content vary.
Step 4
4.2.2 Label A–E
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Answer
A = Ferrite and pearlite
B = Pearlitic and cementite
C = Ferrite and austenite
D = Austenite and cementite
E = Austenite
Step 5
4.2.3 What is the lower critical temperature for steel with a carbon content of 0.83%?
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Answer
The lower critical temperature for steel with a carbon content of 0.83% is approximately between 700 °C and 800 °C.
