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What metal would be better suited for heat transfer, reliability, and cost...??? I'm currently using Aluminum for a 'hot-wedge'.
3 5970i m going to give an interview for iocl on 5th aug . pls tell me what questions can be answered from metallurgical prospect
IOCL,
2922I 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.
2337any input on how to spec out(if possible) a larger grain structure(3/8" or larger) on a Al 6061 forging material.
2216
What is galvanising?
Any body know when the medicals are starting for the BSI P.O , if anybody got any call letter please let me know
what kind of cleaning substance or treatments keep or help prevent cast iron from rusting?
what is the difference between stainless steel and alloy steel?
What is the most ductile metal?
The requirement for ASTM A217 Gr. WC9 castings for valves components like Body and Bonnet were Normalising at 920+/- 20 Deg. C and Tempring 780+/- 20 Deg. C The specification calls furnace shall be calibtated within +/-14 deg. C The Heat Chart shows minimum temperature for normalising 900 to 920 Deg. C, but maximum temperature 960-990 Deg. C Tempering 780+/-20 Deg. C is within limits and accepted. Casting having integral test bars, heat trated along with castings passed in chemical znalysis and mechanical properties. Since normalising maximum temperature is not meeting specification, where castings can be salvaged or renormalised and retempered to meet specification. Whether it will have affect on remechanical properties testing
how would you find out the type of stailess steel that has been used to make your dish?
Differentiate between 304 and 316 grades of steel?
How is solution annealing carried out? What type of furnace is required?
A cantilever beam carrying uniformly distributed load will be ?
Why same casting has different hardness and machine-ability properties?
Discuss about advatages and limitations of powder metallurgy.
Define what is special about the properties of chromium molybdenum steels that make them ideal for pressure vessels?
What is a boring tool ?
What is the chemical composition of ceramics?
