Malleable cast iron is produced-
From white cast iron by the annealing process
From white cast iron by the annealing process: White cast iron is brittle and is the *starting material* for producing malleable cast iron, but quick cooling itself produces the brittle white cast iron, not the ductile malleable cast iron.
Which is the isothermal reversible reaction in which a solid phase is converted into two or more intimately mixed solids on cooling?
During heat treatment of steel, the hardness of various structures in increasing order is
Microstructure of annealed hypereutectoid plain carbon steel consists of
Match List - I with List - II and select the correct answer using the codes given below:
| List - I | List - II | ||
| A. | Nitriding | 1. | Improves the hardness of whole mass |
| B. | Annealing | 2. | Refined grain structure |
| C. | Martempering | 3. | Improves surface hardness |
| D. | Normalizing | 4. | Improves ductility |
Which of the steel is best candidate for heat treatment?