We make aluminum moulds by press casting, can you suggest any thing so that the moulds should shine after casting?
513How is solution annealing carried out? What type of furnace is required? Does one need to be heat in a salt bath?
491What 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?
524When using mercury to recover very, fine gold from ore, what is the best way to separate the gold laden mercury from the ore?
508What 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?
503What are the compositions of brass, how can this metal be heat-treated, what is the melting point of this metal?
514How much gold concentration should be in the organic phase (dbc) before reduction by oxalic acid solution?
590A 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?
717For what reason would an aluminum casting, when applied with a powder coated paint finish, cause a poor finish to the paintwork.
537When 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.
505How 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?
495
Explain heat treatment of brass?
Define what is the melting point of e70 steel, 304,308,316 stainless steels? In addition, define what is the hottest part of the flame in a fire?
What is lathe bed made of ?
What does allotropic mean?
Does case harden steel properties detoriates over time? Especially for guns, parts like bolt carrier, the brand new parts has been kept for 10 year and properly oiled. I am worried about its surface hardness to take the blow during firing.
Define what is the metallurgical explanation of effects of chromium, nickel, molybdenum, and carbon in stainless steels?
What are the chemical composition of cast iron grade 20
Why is chromium molybdenum steels used to build pressure vessels? Define what is special about the properties of chromium molybdenum steels that make them ideal for pressure vessels?
what is proeutectoid ferrite and cementite?
How do you classify shapers?
Throw some light on hardening abilities of metals?
what is widman statten structure?
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?
What are ceramics?
What is the critical speed of shaft?
