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Metallurgy Interview Questions
Questions Answers Views Company eMail

What kind of shell systems are used for investment casting?

 2 3727

Why are the superalloys used for land-based turbines?

 1 3150

What kind of components are fabricated from the superalloys, and what are their roles?

 2 3452

What kinds of NDT methods are available?

 10 15186

Why is non-destructive testing necessary?

 9 14337

What are the superalloys?

 3 7728

What are the superalloys used for?

 2 4792

what is the cause of attenuation due to powerloss

 1 3874

what happens when a EM wave is transmitted

 1 4089

Please send me the comparision of Mils Steel Specification as per BS EN 10130 & IS 2062

 1 3528

What metal would be better suited for heat transfer, reliability, and cost...??? I'm currently using Aluminum for a 'hot-wedge'.

 3 5061

i m going to give an interview for iocl on 5th aug . pls tell me what questions can be answered from metallurgical prospect

IOCL,

2494

what are the ores of copper?

 4 5790

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,

1911

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

Novellus,

1823

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Un-Answered Questions { Metallurgy }

How much gold concentration should be in the organic phase (dbc) before reduction by oxalic acid solution? Is it effective on purity of gold in reduction step? Whatis the ratio of dbc to oxalic acid solution in this step?

588

What are allotropes?

515

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

679

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

509

How gold can be separated from mercury?

554




How much gold concentration should be in the organic phase (dbc) before reduction by oxalic acid solution?

594

What is or what characterize the thermodynamic state of metal (structure of metal)?

531

Define what metal cord transfers electricity?

539

Differentiate between stainless steel and alloy steel?

500

What is thermodynamic state of metal?

548

What are the componentsof SCS14 ?

2738

what is No.1 Laathing Scrap Bundle ( Mill Scrap )

1762

What is dielectric medium in EDM ?

597

Is brass magnetic?

555

Define what kind of cleaning substance or treatments keep or help prevent cast iron from rusting?

536

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