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 turbineblades etc. When both are used in the lost-wax method?

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Does the extrusion process for a355 and a356 alloy have any impact on the impact energy?

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We make aluminum moulds by press casting, can u suggest any thing so that the moulds should shine after casting?

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What is a silver in deming drill bit?

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Define what other events in history might have affected the growth of metallurgy?

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Define what is the strongest metal?

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What are the superalloys used for?

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What is dielectric medium in EDM ?

0 Answers   NIC,

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What is iron ferrite?

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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 can Residual stresses in superalloy components can be minimised?

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why does pure titanium burn on rubbing with pure titanium?

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