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Categories >> Engineering >> Metallurgy        Suggest New Category      Question  Asked @ Answers Views     select   Why same casting has different hardness and machineability properties? One spot it is found hard for machining and another spot soft? It is FG 260 grade for Cast Iron.  0  5 i want to go to US for Bachlore of computer science, I didn't appeared for SAT. my ielts scores are too low only 5.5 band and I am confused if VISA OFFICERS will ask why u hadn't given SAT. what i have to answer pl suggest?  0  17 any input on how to spec out(if possible) a larger grain structure(3/8" or larger) on a Al 6061 forging material. Novellus  0  13 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. Novellus  0  14 what are the ores of copper?  3  99 i m going to give an interview for iocl on 5th aug . pls tell me what questions can be answered from metallurgical prospect IOCL  0  15 What metal would be better suited for heat transfer, reliability, and cost...??? I'm currently using Aluminum for a 'hot-wedge'.  1  76 Please send me the comparision of Mils Steel Specification as per BS EN 10130 & IS 2062  0  79 what happens when a EM wave is transmitted  1  540 what is the cause of attenuation due to powerloss  1  386 What are the superalloys used for?  1  186 What are the superalloys?  2  441 Why is non-destructive testing necessary?  1  170 What kinds of NDT methods are available?  3  679 What kind of components are fabricated from the superalloys, and what are their roles?  1  131 E-Mail New Answers        Answer Selected Questions      [1]   2   3    Next         Civil Engineering Interview Questions     Mechanical Engineering Interview Questions     Electrical Engineering Interview Questions     Electronics Communications Interview Questions     Chemical Engineering Interview Questions     Aeronautical Engineering Interview Questions     Bio Engineering Interview Questions     Metallurgy Interview Questions     Industrial Engineering Interview Questions     Instrumentation Interview Questions     Engineering AllOther Interview Questions       Un-Answered Questions    Question Views Asked at   Select   i m going to give an interview for iocl on 5th aug . pls tell me what questions can be answered from metallurgical prospect 15 IOCL Why are the superalloys used for land-based turbines? 97   Please send me the comparision of Mils Steel Specification as per BS EN 10130 & IS 2062 79   Why do the Gamma Prime and Gamma Double Prime phases play such an important role in promoting strength in the superalloys? 89   When might secondary melting processes be unnecessary? 85   Isn't power metallurgy an expensive processing route to employ? 89   Why are the superalloys sometimes subjected to secondary melting processes? 65   Why do some of the latest 'single crystal' superalloys contain concentrations of the grain boundary strengthening elements, e.g. carbon and boron? 57   any input on how to spec out(if possible) a larger grain structure(3/8" or larger) on a Al 6061 forging material. 13 Novellus What happens to the microstructure during service exposure? 65   i want to go to US for Bachlore of computer science, I didn't appeared for SAT. my ielts scores are too low only 5.5 band and I am confused if VISA OFFICERS will ask why u hadn't given SAT. what i have to answer pl suggest? 17   What special precautions need to be employed if a powder metallurgy route is chosen? 65   Why same casting has different hardness and machineability properties? One spot it is found hard for machining and another spot soft? It is FG 260 grade for Cast Iron. 5   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. 14 Novellus E-Mail New Answers        Answer Selected Questions

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