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We make aluminum moulds by press casting, can you suggest any thing so that the moulds should shine after casting?
1014How is solution annealing carried out? What type of furnace is required? Does one need to be heat in a salt bath?
856What is the difference between plaster used in gold investment casting and ceramic used in the process of investment casting of automobile engine parts and turbineblades etc. When both are used in the lost-wax method?
994When using mercury to recover very, fine gold from ore, what is the best way to separate the gold laden mercury from the ore?
953What affect would increasing the charpy impact toughness on an object have on the surface of an object it strikes if all else remains the same? Would it cause moredamage to the object it strikes?
928What are the compositions of brass, how can this metal be heat-treated, what is the melting point of this metal?
1007How much gold concentration should be in the organic phase (dbc) before reduction by oxalic acid solution?
993A plain carbon steel contains 45 wt% of proeutectoid ferrite. What is its average carbon content in weight percent? I know that you need to use a tie line in the phasediagram, but my book does not really give a good example to go by?
1160For what reason would an aluminum casting, when applied with a powder coated paint finish, cause a poor finish to the paintwork.
947When we do cardonitriding or casehardening operation for a plain carbon steel the case depth, hardness & microstructure are not alike why and what are the basicthing, which makes such a difference.
953How would a salt and water solution clean a penny but a vinegar and salt solution will not clean a penny? What is the cause of this?
1025
what is difference between IS 1018 and IS 2062 E 250A
What are the characteristics of the thermodynamic stage of a metal?
Define boring.
Define rivets.
Why same casting has different hardness and machine-ability properties?
Where is iron ferrite found?
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.
is nickel considered a non-sparking metal?
what is proeutectoid ferrite and cementite?
Differentiate between 304 and 316 grades of steel?
What is d2?
Explain cementite?
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?
What type of grinding is used for harder materials?
how can i prevent the backfire occurrence in copper shaft furnaces?
