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

oxides and oxyacids of sulphur and nitrogen, Environmental pollution cause...

Environmental pollution caused by oxides and oxyacids f nitrogen and sulphur

BHC, structure and uses

structure and uses

Electrochemistry, Explain construction & working of calomel electrode.

Explain construction & working of calomel electrode.

Calculation of empirical formula, Calculation of empirical formula ...

Calculation of empirical formula The steps included in the calculation are as follows, (a) Divide the percentage (%) of each element by its atomic volume. This gives th

Formation of proteins-peptide bond, Formation of proteins-peptide bond: ...

Formation of proteins-peptide bond: Proteins are made by joining the carboxyl group of one amino acid to the α-amino group of other amino acid. The bond build among two amino a

Explain ratio scales, Ratio scales It is also possible to record likin...

Ratio scales It is also possible to record liking or acceptability using magnitude estimation scaling methods, but consumers may find it difficult to handle the concept of rat

Subliamtion, By who can sublimation be useful? How can it be useful?

By who can sublimation be useful? How can it be useful?

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