Answer / Prabal Chatterjee

Stress concentration in metallurgy is caused by geometrical discontinuities (like notches, holes, or sharp corners) that focus the local stresses and can lead to cracking or failure.

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 the usgae of angle plate ?

1 Answers   Essar,

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Which type of key is used between shaft and pulley?

1 Answers   NIC,

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difference between sand casting and shell casting

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Define what is the difference between diagrams of it and ct in heat treatment of steels?

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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

1 Answers   Leader Valves,

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Define what is the difference between plaster used in gold investment casting and ceramic used in the process of investment casting of automobile engine parts and turbine blades etc. When both are used in the lost-wax method?

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Where is iron ferite used?

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why magnetite iron ore is not taken into the blast furnace?

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What is spcc material?

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What type of grinding is used for harder materials?

1 Answers   NIC,

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Explain proeutectoid ferrite

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