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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.
We have seen that different metal/metal ion combinations have different values of electrode potentials. The various elements can be arranged in order of increasing or decreasing va
amphoterism of methanol Compound A is much more basic than compound B (charge effect). By the element effect, C is much more basic than A; this follows from the fact that if we
No, it does not depend upon concentrations of reactants, From the Arrhenius equation, k = Ae^(-Ea/RT) We can say, that it is dependent on activation energy(Ea) and temperatu
catalyst used in polymerization
Define Product process problem in experimental design method In food product design, there are two different kinds of system problems - process and mixture problems - that shou
Q. Write short notes on priming and foaming. Ans. Priming and foaming: When a boiler produces steam rapidly, some particles of the liquid water are carried along with the s
preparation of hydrogen and hydrogen compounds
#questionQ1. 0.28gm of CaCO3 was dissolved in HCl and the solution was made to one litre with distilled water. 100 ml of the above solution required 28 ml of EDTA solution on titra
write a short note on colour and constitution
what are the electron deficient molecule explain with examples
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