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

Calculate the e.m.f of the cell , To calculate the e.m.f of the cell when d...

To calculate the e.m.f of the cell when does the nelsons equation is use? Ans) The Nernst equation is useful to measure the e.m.f of the cell when the concentrations of solution

Sodium, what can be formed by sodium reacting with epsum salt

what can be formed by sodium reacting with epsum salt

Dextrorotary compounds and levi rotary compounds, What are dextrorotary com...

What are dextrorotary compounds and Levi rotary compounds? Ans) Compounds that rotate the plane polarized light to the right are known as Dextro rotatory compounds and that rota

Chemical formular, copper reacts with oxygen to form two oxide X and Y .On ...

copper reacts with oxygen to form two oxide X and Y .On analysis 1.535g of X yielded 1.365g of copper and 1.450g of Y yielded 1.160g of copper. [I] determine the chemical formula o

What is the meaning of casting - fabrication processes, What is the meaning...

What is the meaning of Casting - fabrication processes Fe-C alloys with more than 2% carbon are known as cast irons. On crossing liquidus, proeutectic crystallizes first. O

Borazole, preparations and structure borazole?

preparations and structure borazole?

Correct set of four quantum numbers for valence electron, Correct set of fo...

Correct set of four quantum numbers for valence electron of rubidium (Z = 37) is: (1)  5,0,0,+1/2                    (2)  5, 1,0,+1/2    (3)  5,1,1,+1/2

Define polar covalent bond, The covalent bond produced by the unequal shari...

The covalent bond produced by the unequal sharing of electrons among the two atoms is known as polar covalent bond.

Why does methyl ethanoate not give iodoform test?, Why does methyl ethanoat...

Why does methyl ethanoate not give iodoform test while ethyl ethanoate does? Ans) Iodoform test for esters is the test given by its products on hydrolysis methyl ethanoate give

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