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?
522When 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?
501What are the compositions of brass, how can this metal be heat-treated, what is the melting point of this metal?
512How 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?
712For 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?
493
Why post-heating is done in alloy steel welding?
What is the minimum temperature for stress relieving of astm a 519 gr.4130 material and please tell us where we can find the location.
What is the composition of d2?
Why same casting has different hardness and machine-ability properties?
What is the chemical composition of ceramics?
Discuss steam engines. What is its overall efficiency ?
Are the grain boundaries a continuation of regular lattice structure from one grain to another? Explain.
What is iron ferrite and what is it used for, and where is it found?
Define what is the casting and forging?
What is a silver and deming drill bit?
How gold can be separated from mercury?
what is special about the properties of chromium molybdenum steels that make them ideal for pressure vessels?
Explain rupture stress
What is iron ferite? Where is it used?
What is the melting point of e70 steel, 304,308,316 stainless steels?
