Discuss the various annealing processes, Chemistry

Assignment Help:

Explain objectives of annealing? Discuss the various annealing processes? Is spheroidising different from annealing? Illustrate.

A  slow  cooling  rate  from  eutectoid  temperature  yields  course  pearlite  -  a  mixture  of comparatively coarse crystals of ferrite and  cementite. Such a slow cooling is known as annealing. Here,  sufficient  time  is  available  for  carbon  in  the  austenite  to  diffuse  and  redistribute itself to 0.02% in ferrite and 6.67% in cementite.  During annealing, effective transformation temperature  is  low,  where  rate  of  growth  is  rapid  compared  to  rate  of  nucleation. Hence, spheroidising is obviously different from annealing.

 


Related Discussions:- Discuss the various annealing processes

What are the chemical properties of ammonia, Q. What are the Chemical Prope...

Q. What are the Chemical Properties of Ammonia? Ans. Combustion: Ammonia does not burn in air but will burn in pure oxygen to form nitrogen and water vapor. 4NH 3 (g) +

Chemical combinations, explain about law of chemical combinations in about ...

explain about law of chemical combinations in about 200 words?

Explain generation of the electrophile, Generation of the electrophile : Th...

Generation of the electrophile : The electrophile is the carbocation produced by protonation of the alcohol  oxygen and loss of water.

Partition coefficient of acetic acid between octanol and h2o, compare your ...

compare your partition coefficient of acetic acid with the literature and calculate percentage error

The oxygen of the hydronium ion, The oxygen of the hydronium ion The ox...

The oxygen of the hydronium ion The oxygen of the hydronium ion has approximately tetrahedral geometry and is therefore sp 3- hybridized. Two of the sp 3 hybrid orbitals conta

Define heat and temperature, Q. What is basic diffrence between heat and te...

Q. What is basic diffrence between heat and temperature? Ans. Heat is energy which flows from hot objects to cooler ones.  It flows because of the temperature difference betw

Explain asymmetric molecule, Explain the following terms: (a) Asymmetric...

Explain the following terms: (a) Asymmetric molecule (b) R and S notations

CALORIMETRY, when a 0.800g sample of CaCl2 is dissolved in 9.85g of water i...

when a 0.800g sample of CaCl2 is dissolved in 9.85g of water in a microscale calorimeter the temperature of the solution rose from 23.4 degrees celcius to 35.8 degrees celcius.calc

Electrolysis of water in the presence of an indicator., Electrolysis of Wat...

Electrolysis of Water in the Presence of an Indicator • Place ~ 50 mL of the thawed cabbage juice in the same glass container (after rinsing) used in Step 1. • Insert the electro

Law of conservation of mass, what are the applications of law of conservati...

what are the applications of law of conservation of mass ?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd