Koolstofdiagram Flashcards
What is the primary component of the iron-carbon diagram?
Iron and carbon.
True or False: The iron-carbon diagram is only applicable to pure iron.
False.
What is the maximum carbon content in steel according to the iron-carbon diagram?
2.14% carbon.
Fill in the blank: The iron-carbon diagram is also known as the _____ diagram.
Fe-C diagram.
Which phase is present at temperatures above 912°C in the iron-carbon diagram?
Austenite.
What are the two main phases of iron in the iron-carbon diagram?
Ferrite and cementite.
Which structure forms at 727°C with a carbon content of 0.76%?
Pearlite.
What is the eutectoid reaction temperature in the iron-carbon diagram?
727°C.
True or False: Cementite is a compound of iron and carbon.
True.
What is the significance of the eutectic point in the iron-carbon diagram?
It indicates the composition and temperature at which the liquid phase transforms into two solid phases.
Which phase is stable at room temperature in the iron-carbon diagram?
Ferrite.
What is the carbon content of cast iron according to the iron-carbon diagram?
Typically between 2% and 4% carbon.
Multiple Choice: What happens to austenite when it is cooled slowly?
It transforms into pearlite.
What does the term ‘hypoeutectoid’ refer to in the iron-carbon diagram?
Alloy compositions with less than 0.76% carbon.
True or False: The iron-carbon diagram can predict the mechanical properties of steel.
True.
What is the primary use of the iron-carbon diagram in metallurgy?
To understand the phase changes and properties of steel and cast iron.
What is the formula for cementite?
Fe3C.
What does the term ‘hypereutectoid’ refer to in the iron-carbon diagram?
Alloy compositions with more than 0.76% carbon.
Fill in the blank: The region above the liquidus line in the iron-carbon diagram represents _____ phases.
Liquid.
Multiple Choice: Which component of the iron-carbon diagram has the highest melting point?
Cementite.
What is the primary characteristic of ferrite in the iron-carbon diagram?
It is a relatively soft and ductile phase.
What type of structure is formed from the eutectoid reaction?
A mixture of ferrite and cementite (pearlite).
True or False: The iron-carbon diagram is only useful for understanding steel.
False.
What is the critical temperature range for the transformation of austenite to martensite?
Below 727°C.
What does the term ‘peritectic reaction’ refer to in the iron-carbon diagram?
A reaction where a solid and a liquid phase combine to form a different solid phase.
