Last phase in patenting process

Q.  Which of the following is the last phase obtained after completing heat treatment cycle in patenting process?
- Published on 11 Sep 15

a. Bainite
b. Martensite
c. Pearlite
d. None of the above

ANSWER: Pearlite


  • Sravanthi    -Posted on 12 Nov 15
    - The process of patenting is similar to austempering process. It differs in the range of temperature used for isothermal transformation.

    - In this process, austenized steel is quenched in molten bath furnace and is maintained at temperature above or below the nose of TTT curve.

    - Till the transformation is completed this temperature is maintained and later cooled to room temperature. Pearlite is obtained by the transformation of austenite.

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