Answer / Jogender Singh

Ceramics are inorganic solid materials mainly composed of metal compounds (metal oxides, nitrides, etc.). They have a high melting point, hardness, and resistance to heat and corrosion.

Define what is the casting and forging?

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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.

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Define what is carbide?

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Define knurling.

1 Answers   Essar,

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What is mean by D2 Material used for Die tooling? What are the composition in that?

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When might secondary melting processes be unnecessary?

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Why same casting has different hardness and machineability properties? One spot it is found hard for machining and another spot soft? It is FG 260 grade for Cast Iron.

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What is the composition of cast grade iron 35?

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Define what is the different between ferrite percentage and ferrite number?

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How can you separate gold from mercury?

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Define what are the compositions of brass, how can this metal be heat-treated, define what is the melting point of this metal?

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We make aluminum moulds by press casting, can you suggest any thing so that the moulds should shine after casting?

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