Answer Posted / mukesh parekh

Annealing means softning of any component for Maching and
core refining. Where as Stress Releaving carried out to
remove stresses from Febrication Body, Casting Components
for Weather distortion, Heavy Maching stresses for avoiding
distortion in Hardning process. Stress Releaving Process is
mainly carried out to remove Stress from components without
reducing basic hardness of material.

Which of different types of cast irons is stronger? Is their strength superior to steels?

883

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I currently use 17-7 PH stainless which is hardened to condition CH after forming. raw matl is .1.75"X .12" X .008". Its main usage after hardening is silicon wafer retainer where it's contantly cycled up and down to putin and remove wafer after 40-60 sec process at 400C temp. At this high temperature this part seemed to deform after a a couple of hundred wafer which is what it was designed for in the first place. THere is a proposal to go to a different material to increase lifeline of this part. My question is..... can 321 SST be a plugin replacement. I know this has a higher temp rating but how about its forming characteristics, will it have spring properties, and wont become brittle after prolonged exposure to 400C.

2388

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Differentiate between stainless steel and alloy steel?

924

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Explain cementite?

1013

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Is brass magnetic?

959

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any input on how to spec out(if possible) a larger grain structure(3/8" or larger) on a Al 6061 forging material.

2271

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Witch type curome oxide in ms matle?

2380

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How would a salt and water solution clean a penny but a vinegar and salt solution will not clean a penny?

922

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What is impact energy?

949

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Discuss the otto cycle with diagram.

1038

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How to calculate heat affected zone in weld?

1096

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How is solution annealing carried out? What type of furnace is required? Does one need to be heat in a salt bath?

856

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How do you classify lathes?

1073

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What is iron ferrite?

1042

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What is d2?

978

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