Question

what is the name if hot steel cooled rapidly to form a new structure​

Answer 1

Answer:

Through a quenching process known as quench hardening, steel is raised to a temperature above its recrystallization temperature and rapidly cooled via the quenching process. The rapid quenching changes the crystal structure of the steel, compared with a slow cooling.

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Answer 2

Answer:

Martensite

If cooling is fast enough, a new structure known as martensite is formed, although this new structure (an aggregate of iron and cementite) is in the alpha phase. It must be remembered that there are only three phases in steels, but there are many different structures.