Question
Magnesium treatment is carried out to produce ______________ cast iron.
The correct answer is
spheroidal graphite
Magnesium Treatment Yields Spheroidal Graphite Cast Iron
Magnesium treatment is a key metallurgical process used in the production of a specific type of cast iron.
Reasoning:
- Adding magnesium (or its alloys like magnesium-ferrosilicon) to molten iron modifies the graphite structure.
- Instead of forming flakes (as in gray iron) or cementite (as in white iron), the graphite precipitates in a spherical or nodular shape.
- This specific graphite morphology is characteristic of spheroidal graphite cast iron, also known as ductile iron or nodular iron.
Therefore, magnesium treatment is carried out to produce spheroidal graphite cast iron.
Was this answer helpful?
Important Questions from Microstructure Ferrite Pearlite Cementite Fraction
- In optical microscopy, which one of the following combinations of wavelength ($\lambda$) and numerical aperture (NA) provides the best spatial resolution?
- A 0.2 wt.% plain carbon steel sheet is heated and equilibrated in the inter-critical region followed by instant water quenching. The microstructure of the quenched steel sheet consists of
- Which one of the following crystal structure changes occurs during the transformation of mild steel from austenite to martensite?
- With increase in carbon content (up to 2 mass%) in Fe-C alloy, which one of the following statements is correct with respect to the lattice parameters ($c$ and $a$) of BCT martensite?
- In a typical scanning electron microscope (SEM) image, information about topography and atomic contrast are obtained from ________.
Need Expert Advice?
