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We make aluminum moulds by press casting, can you suggest any thing so that the moulds should shine after casting?
979How is solution annealing carried out? What type of furnace is required? Does one need to be heat in a salt bath?
813What 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?
939When using mercury to recover very, fine gold from ore, what is the best way to separate the gold laden mercury from the ore?
903What 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?
886What are the compositions of brass, how can this metal be heat-treated, what is the melting point of this metal?
964How much gold concentration should be in the organic phase (dbc) before reduction by oxalic acid solution?
951A 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?
1108For what reason would an aluminum casting, when applied with a powder coated paint finish, cause a poor finish to the paintwork.
902When 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.
903How 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?
954
Define boring.
Describe strain aging based on dislocation theory?
Why we are doing post heating in alloy steel welding?
what medal conducts heat best?
Which type of key is used between shaft and pulley?
What is the material of E185
how would you find out the type of stailess steel that has been used to make your dish?
What is the melting point of e70 steel, 304,308,316 stainless steels? In addition, what is the hottest part of the flame in a fire?
How 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?
Explain metallurgical microscopes?
What are the chemical composition of cast iron grade 20
Why same casting has different hardness and machine-ability properties?
Which liquid would oyu use to dissolve gold?
What are the allotropes of iron and carbon?
What is the major difference between quenching and annealing?
