Can you explain the refrigeration cycle?

0 Answers   Essar,

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Describe strain aging based on dislocation theory?

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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.

0 Answers   Novellus,

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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?

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A cantilever beam carrying uniformly distributed load will be ?

0 Answers   NIC,

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Why is chromium molybdenum steels used to build pressure vessels? Define what is special about the properties of chromium molybdenum steels that make them ideal for pressure vessels?

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Define what is the difference between plaster used in gold investment casting and ceramic used in the process of investment casting of automobile engine parts and turbine blades etc. When both are used in the lost-wax method?

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HOW TO GET LAST 10 YRS. QUESTION PAPERS

0 Answers   ONGC,

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Why steel is preferred for construction of aircraft?

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what is the hardness of ohns before heat treatment process and hardness of en series before heat treatment process

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What happens to the microstructure during service exposure?

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What is a gray surface?

0 Answers   Essar,

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