Answer / malayappan

Generally, When an aloy is to be manufacured and when the
two metals A & B do not exihibit a solubility in both
liquid and solid condition, then the most prepereble method
is Powder Metallurgy. Metal powders are mixed and with a
binding metal (having low melting point than the two
primary powders) or by mechanical bonding the components
are formed by cold or hot pressing. they are placed inside
furnace and heated to a temperature known as sintering
temperature. (generally with a third addinal bonding
metaly, to its melting point. In powder metallrgy the poder
size, sintering temperature, the compacting pressure all
play a vital role.

Answer / raghu

with the help of metallic powders we can produce small size
metal components , specially for automobile industries

Answer / a

powder metallurgy has been defined as the art and science of
producing fine metal powders and objects finished or
semi-finished shaped from individual, mixed or alloyed metal
powders with or without the inclusion of non-metallic
constituents.

Answer / sudipta panda

powder metallurgy is the process of briquetting the fine powder metal particles by mix with binders or by hot or cold pressing with the help of dies in a predetermined temperature.mostly this types processes are used in automotive industries.

Please send me the comparision of Mils Steel Specification as per BS EN 10130 & IS 2062

1 Answers  

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The stress concentration is caused due to ?

0 Answers   NIC,

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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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Define what is proeutectoid ferrite and cementite?

0 Answers  

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what is a rate controlling step ? how is it dependent on reaction path ? explain with an example.

0 Answers  

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What are the properties and application of manganese steel?

0 Answers  

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does any one has gate solutions of 2007,08,09 metallurgical engg papers?

0 Answers  

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what are the causes of scaling in cast iron, after subjecting it to annealing process.

0 Answers  

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Why do the Gamma Prime and Gamma Double Prime phases play such an important role in promoting strength in the superalloys?

1 Answers  

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diffrent beetwen eutoctoid &eutectic steel

8 Answers   KRL, Qatar Steel,

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What is the help of crowning on pulleys

0 Answers   NIC,

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Explain stress corrosion cracking?

0 Answers  

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