When using mercury to recover very, fine gold from ore, define what is the best way to separate the gold laden mercury from the ore?

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When austenitized, carbon steel is quenched, why is the bcc crystal elongated into a body-centered tetragonal crystal structure?

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What is the help of crowning on pulleys

0 Answers   NIC,

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Explain a silver and deming drill brit?

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Define what are ceramics?

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Is there any way through hardening and anodizing some type of aluminum, it could be as hard as steel? I have hardened steel rollers that run up and down on a ramp along with spring pressure. Alternatively, if you are familiar with snowmobiles, the rollers run on the helix on the secondary clutch.

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what is meant by hardening ability of metals?

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For define what reason would an aluminum casting, when applied with a powder coated paint finish, cause a poor finish to the paintwork.

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Define what are metallurgical microscopes?

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For what reason would an aluminum casting, when applied with a powder coated paint finish, cause a poor finish to the paintwork.

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Define rivets.

0 Answers   Essar,

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The requirement for ASTM A217 Gr. WC9 castings for valves components like Body and Bonnet were Normalising at 920+/- 20 Deg. C and Tempring 780+/- 20 Deg. C The specification calls furnace shall be calibtated within +/-14 deg. C The Heat Chart shows minimum temperature for normalising 900 to 920 Deg. C, but maximum temperature 960-990 Deg. C Tempering 780+/-20 Deg. C is within limits and accepted. Casting having integral test bars, heat trated along with castings passed in chemical znalysis and mechanical properties. Since normalising maximum temperature is not meeting specification, where castings can be salvaged or renormalised and retempered to meet specification. Whether it will have affect on remechanical properties testing

0 Answers   Leader Valves,

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