Question

15. The process of heating and 2 points
cooling of solid steel article
under carefully controlled
conditions is known as
O Annealing
O Normalizing
O Heat treatment
O Quenching​

Answer 1

Answer:

Heat treatment

I think this is the answer

Answer 2

Answer:

ANNEALING

Annealing. Heating and slowly cooling metal (usually steel) to remove stress, make the metal softer, refine the structure, or change its ductility.