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? Define what is the ratio of dbc to oxalic acid solution in this step?
868Define what is or define what characterize the thermodynamic state of metal (structure of metal)?
838Is it possible to determine the heat treatment condition in stainless steel (astm a 479 gr xm-19) by checking the microstructure?
862
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.
what is the different between ferrite percentage and ferrite number?
Any body know when the medicals are starting for the BSI P.O , if anybody got any call letter please let me know
Define what is the casting and forging?
What is the major difference between quenching and annealing?
What is the function of washer?
What is heat treatment?
Which is stronger, tungsten or titanium?
how can i prevent the backfire occurrence in copper shaft furnaces?
Aircraft gasturbine is made of ?
Will aluminum alloy like 380 or 356 settle? Meaning while in “liquid form” above melting point will the heavier elements like copper, fe, silicon, zinc etc. Settle to the bottom of the liquid/molten aluminum after a period.
what is the metallurgy use?
Witch type curome oxide in ms matle?
Which liquid can dissolve gold?
Define what is widman statten structure?