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 Welding and Metalwork - 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 proce... 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 Welding and Metalwork - Question 4 - 2017 - Paper 1
Step 1
Cementite
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Answer
Hard: Cementite is a rigid structure that resists deformation.
Brittle: It tends to fracture under stress rather than deform.
Step 2
Ferrite
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Answer
Soft: Ferrite is relatively low in strength and is ductile.
Ductile: It can undergo significant deformation without breaking.
Step 3
Identify the diagram shown in FIGURE 4.2.
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Answer
The diagram represents the Iron-Carbon Equilibrium.
Step 4
Label A–E.
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Answer
A = Ferrite and pearlite
B = Pearlite and cementite
C = Ferrite and austenite
D = Austenite and cementite
E = Austenite
Step 5
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 between 700 °C and 800 °C.
