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 Categories >> Engineering >> Metallurgy
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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.    4  4584
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  611
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  599
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  751
what are the ores of copper?    4  2224
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  1305
What metal would be better suited for heat transfer, reliability, and cost...??? I'm currently using Aluminum for a 'hot-wedge'.    3  2036
Please send me the comparision of Mils Steel Specification as per BS EN 10130 & IS 2062    1  1553
what happens when a EM wave is transmitted    1  2374
what is the cause of attenuation due to powerloss    1  1888
What are the superalloys used for?    2  2118
What are the superalloys?    3  4612
Why is non-destructive testing necessary?    9  6495
What kinds of NDT methods are available?    9  7438
What kind of components are fabricated from the superalloys, and what are their roles?    2  1342
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Un-Answered Questions
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where do i get previous question papers of metallurgy? 744
any input on how to spec out(if possible) a larger grain structure(3/8" or larger) on a Al 6061 forging material. 599
what are different grades of mild steel available for making machine structure (housing) 1300
What is equivalent is 2004 cl 5 266
Please send the Sundar TVS Motors placement papers to this mail id. 509
what is wedge load test method . what is offset method . 188
Any body know when the medicals are starting for the BSI P.O , if anybody got any call letter please let me know 472
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 126
what is a rate controlling step ? how is it dependent on reaction path ? explain with an example. 993
dear sir i need some information about prevent eutectic carbide network(as cast) formation in 12% cr steel casting by another alloying element(my analays: c=1.2-1.4 cr=11-13 mo=0.2-0.4 ni=0.2-0.4 )or break network carbid after formation in solidification by heat tretment please help me my email adress: 851
What is the chemical composition of FCVS350 ? 1678
For the same part, it is possible to Specify the two different type of Hardness with same scall(EX-Quenching and tempering==>450 to 500HV30 & Hardening and Austempering 330- 380HV30) 741
white rust formation over zinc plated and passivated fasteners during CED coating. WHY? 2433
sir please send me previous question papers on metallurgy at .....thank you 543
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